Variable Periods Or Intervals Between Controlling Operations Patents (Class 318/444)
  • Patent number: 6384557
    Abstract: A windshield wiper drive device for driving a windshield wiper (11) in an alternating motion in a range of motion (17) between two turning point positions (A, C) includes a motor (1) for moving the windshield wiper (11), a detector (6) for detecting a time at which the windshield wiper (11) moves past a given position (A, C) in the range of motion (17), a control circuit (8) for reversing the direction of motion of the motor (1) at each turning point position (B, D), and an incremental transducer for detecting the distance traveled by the windshield wiper (11) from the given position (A, C). The control circuit (8) reverses the direction of motion of the motor (1) as soon as it is detected that the windshield wiper (11) has traveled a defined distance.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: May 7, 2002
    Assignee: Robert Bosch GmbH
    Inventors: Marcellus Weber, Peter Braun, Michael May
  • Patent number: 6373212
    Abstract: An electrical connection between a potentiometer, an actuating motor and control electronics for controlling an actuating element has heretofore been composed of electrical cables, so that a large number of contact points were necessary overall, whereby however, each additional contact point increased the risk of a fault and made the assembly process more expensive. In order to reduce the number of contact points, the base substrate of the potentiometer and the contact board of the motor are in the form of an integral board, and at least some of the electrical connections comprise conductor tracks embedded in the substrate. Electrical components, such as a motor inductor for radio interference suppression, may also be mounted on the board.
    Type: Grant
    Filed: September 6, 2000
    Date of Patent: April 16, 2002
    Assignee: Mannesmann VDO AG
    Inventor: G√ľnther Bender
  • Patent number: 6362587
    Abstract: In one form, the present invention provides an apparatus for controlling a windshield wiper system of a motor vehicle in combination with the motor vehicle. The motor vehicle has a steering wheel. The apparatus includes a first actuation device coupled to the windshield wiper system. The first actuation device controls continuous operation of the windshield wiper system at a selected speed. The second actuation device is coupled to the windshield wiper system and is operative to temporarily increase the selected speed selected by the first actuation device. The second actuation device includes a button for attachment to the steering wheel.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: March 26, 2002
    Assignee: DaimlerChrysler Corporation
    Inventor: Robert B Hutter
  • Patent number: 6353392
    Abstract: A vehicular rain sensor system for detecting precipitation on an exterior surface of a window includes an illumination sensor that is decoupled from the window. The illumination sensor is preferably an imaging array sensor which communicates a signal to a control which further determines whether rain is present on the window. The control includes an edge detection function for detecting edges of precipitation droplets on the window in response to the light values sensed by the sensor and activating the windshield wipers of the vehicle when the sum of the light values exceeds a predetermined threshold value. The rain sensor system may further include a polarizing filter and an illumination source, such that the rain sensor system not only prevents false signals of rain when only fog is present on an interior surface of the window, but also actually detects fog particles on an interior surface of the window.
    Type: Grant
    Filed: April 27, 2000
    Date of Patent: March 5, 2002
    Assignee: Donnelly Corporation
    Inventors: Kenneth Schofield, Mark L. Larson, Brent J Bos, Niall R Lynam
  • Patent number: 6335601
    Abstract: A wiper control device suitable used for controlling the wiper apparatus possible to solve a difference in the wiping range caused by the difference in the operation speed (inertial force) of the wiper blade by using the wiper linkage provided with an eccentric mechanism and changing the rotational direction of a wiper motor according to the operation speed, the wiper control device is provided with a wiper switch, the wiper motor, a position switch, a controller and a motor driving circuit, and the controller executes control to change the rotational direction of the wiper motor at the time when the wiper blade arrives in the upper or lower turning position in response to switching operation of the wiper mode.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: January 1, 2002
    Assignee: Jidosha Denki Kogyo Kabushiki Kaisha
    Inventors: Masaru Kato, Yasuki Matsumoto, Haruo Yamazaki
  • Patent number: 6329779
    Abstract: An improved method of detecting the presence of an obstacle in the path of a motor-driven panel by computing the slope of a measured motor speed signal in a way that cancels the effect of periodic undulation of the speed signal, and comparing the computed slope to a slope threshold that is selected as a function of the average motor speed. A position sensor produces a series of pulses corresponding to panel movement, and a microprocessor-based controller stores an array of speed-related samples corresponding to the time periods between successively produced sensor pulses. The average speed is computed at two different points in the array, and the slope of the stored speed samples is determined according to a difference between the computed average speeds.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: December 11, 2001
    Assignee: Delphi Technologies, Inc.
    Inventors: John Thomas Pimley, Robert W. Hjelmeland
  • Publication number: 20010043047
    Abstract: Operation of a windshield wiper system for cleaning a windshield of a motor vehicle includes driving at least one wiper by an electric drive motor so that the at least one wiper shifted between two terminal positions, processing by a control unit as the input variable the output signals of a rain quantity and the switching signals of a manually controllable switch means, and processing as the output variable a supply voltage of the electric drive motor so as to control the wiper speed, operating the at least one wiper (8) with variable intermittent interval times and at variable wiper speeds, as a function of a rain quantity detected by the rain sensor (12), so that precisely one wiper speed and precisely one intermittent interval time are associated with each measured rain quantity, and moving the at least one wiper (8) in an intermittent mode with a lower speed than in a continuous mode.
    Type: Application
    Filed: May 24, 2001
    Publication date: November 22, 2001
    Inventors: Hans-Georg Klug, Gebhard Michenfelder, Hans Meier, Henry Blitzke, Michael May
  • Patent number: 6320340
    Abstract: A drive device for a part of a vehicle that can be adjusted between terminal positions, in particular the roof panel of a vehicle roof, having an electric motor that is connected to a pinion via a first step-down gear. A switch device that controls the electric motor for stopping the electric motor in at least one predetermined position of the adjustable part, and a second step-down gear that moves a switch body. A magnetic-field-sensitive sensor, controllable by the switch body, for controlling the switch device. A conductor track board inside a housing and extending with an extension over the path of motion of the switch element. The magnetic-field-sensitive sensor is disposed at a radial distance from the circular path of motion of the switch body and bridges the distance between the magnetic-field-sensitive sensor and the path of motion of the switch body by means of magnetic flux guide bodies.
    Type: Grant
    Filed: October 23, 2000
    Date of Patent: November 20, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Alois Hils, Friedrich-Wilhelm Dreier, Christian Baeuerle
  • Patent number: 6249098
    Abstract: A wiper blade wipes over a predetermined range of a front windshield in response to rotation of a wiper motor in a forward and reverse directions. The wiper blade operates in a wiping range between a predetermined upper reversing position and a predetermined lower reversing position. An upper pre-reversing position is defined inside of the upper reversing position, and a lower pre-reversing position is defined inside of the lower reversing position. A rotation sensor produces pulse signals in response to the rotation of the wiper motor. A CPU counts the pulse signals produced from the rotation sensor when a position detection sensor detects an arrival of the wiper blade at the pre-reversing position. The CPU produces a control signal to a drive circuit and reverses the direction of the drive current of the wiper motor to reverse the rotation of the wiper motor, when the pulse count value reaches a predetermined value.
    Type: Grant
    Filed: October 18, 1999
    Date of Patent: June 19, 2001
    Assignee: ASMO Co., Ltd.
    Inventors: Naomi Miyazaki, Masashi Nakata, Yasuaki Uchida, Akio Oshiro
  • Patent number: 6242876
    Abstract: Windshield wiping systems commonly include a parking control, which delivers power to a wiping motor, while waiting for the wipers to reach a parked position. When the wipers park, the parking control terminates power to the motor. The invention repeatedly exercises the parking control, in order to obtain intermittent wiper operation. That is, the invention allows parking to occur, and then waits for a short time. Next, the invention withdraws a wiper from parked status, and then allows the parking system to park again, and so on.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 5, 2001
    Assignee: Valeo Electrical Systems, Inc.
    Inventor: Peter Hatch Thompson
  • Patent number: 6236180
    Abstract: A windshield washer control system for use on a vehicle is herein disclosed. The windshield washer control system for use on a vehicle having an occupant compartment with a windshield and a windshield wiper device. The wiper device is movable across a predetermined area of the windshield and the windshield washer device includes a sprayer and a sprayer nozzle. The windshield washer device is comprised of a windshield transparency detection system and a controller unit. The controller unit includes three operating modes. The first operating mode is defined by the windshield washer device being manually operable. The second operating mode is defined by the windshield washer device operating by cycle, wherein the windshield washer device is controlled to spray after a predetermined number of wiper cycles. The third operating mode is defined by the windshield washer device being automatically operable by using the windshield transparency detection system.
    Type: Grant
    Filed: October 14, 1999
    Date of Patent: May 22, 2001
    Assignee: DaimlerChrysler Corporation
    Inventors: Joseph G. Contos, Mohamed S. Meskouri, Jerald P. Roach
  • Patent number: 6184642
    Abstract: A system and a method for controlling the operation of a vehicle window wiper device as a function of the quantity of liquid present on the window are described. The wiper device comprises an electric drive motor connected to at least one wiper blade arm provided with a wiper blade. The control system comprises: a first sensor adapted to provide a first output signal corresponding to a first quantity dependent on the instantaneous friction between the wiper blade and the vehicle window; a second sensor adapted to provide a second output signal corresponding to a second quantity correlated to the aerodynamic load acting on the wiper blade; and a processing and control unit coupled to both sensors to receive at its input the first and the second signal).
    Type: Grant
    Filed: December 14, 1999
    Date of Patent: February 6, 2001
    Assignee: Denjo Manufacturing Italia S.P.A.
    Inventor: Francesco Paolo Ausiello
  • Patent number: 6177775
    Abstract: A system and method for use in synchronizing a vehicle wiper to an onboard audio signal. The method typically includes detecting a tempo of the audio signal and moving the wiper based on the detected tempo of the audio signal. Typically, the wiper motion is controlled by a wiper control configured to adjust the speed and/or delay of the wiper, such that the wiper is synchronized with the detected tempo of the audio signal.
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: January 23, 2001
    Inventors: Mary C. Bruington, Mark D. Alleman
  • Patent number: 6175205
    Abstract: A device (10) for operating a windshield wiper (12) is proposed, with a moisture sensor (22) for detecting the wetness of a window that in addition to detecting rain and droplets also detects fog and drizzle. The measured values (Us) of the moisture sensor (22) are allocated incremental values (Ink) by the control unit (16). The difference between two successive incremental values (Ink) is to be added, with a sign (+ or −), in the memory (28) to a sum (&Sgr;) of differences formed previously in the same way, and when a threshold (S) is reached by the sum (&Sgr;) stored in the memory (28), the control unit (16) trips a wiper operating mode.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: January 16, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Gebhard Michenfelder, Harald Buehren, Henry Blitzke, Mario Kroeninger
  • Patent number: 6160369
    Abstract: An optically operated automatic control system for a vehicle's windshield wipers can automatically activate the windshield wipers or a water dispenser filled with cleansing agent in response to the amount of rain cast on a windshield or the level of dirtiness of the same. Thus, a clear vision is constantly kept through a windshield glass for the driver of a vehicle to see. The automatic control system is mainly equipped with a photography device at a proper position adjacent the windshield to take the vision in front of a vehicle via the windshield. Afterwards, a series of calculations via a number of preset mathematical equations are conducted so as to get the wiper control system or the water dispenser to automatically operate accordingly. Thus, the windshield glass of a vehicle can always be kept clear and clean for a driver in driving to see through any time.
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: December 12, 2000
    Assignee: E-Lead Electronic Co., Ltd.
    Inventor: Stephen Chen
  • Patent number: 6157154
    Abstract: In a wiper apparatus for carrying out wiping motion with use of rotational drive of a motor, reverse rotation due to the application of external force on the wiper blade is positively detected. In response to the detection result, the motion of the motor and the wiper blade is controlled. The detection of the reverse rotation is carried our such that two kinds of periodic signals are generated depending on the rotation direction of the drive shaft, and the phase relationship between the periodic signals are arranged to differ depending on the rotation direction, and then the rotation direction is detected from the phase relationship. The wiper apparatus may be an opposing type wiper apparatus having a pair of wiper blades, and control operation of the wiper blades may be arranged such that the position taken by the wiper blade is detected by counting a number of pulses which are generated in association with the rotation of the drive shaft of the motor.
    Type: Grant
    Filed: April 13, 1999
    Date of Patent: December 5, 2000
    Assignee: Mitsuba Corporation
    Inventor: Toshiyuki Amagasa
  • Patent number: 6150783
    Abstract: A regulated windshield wiper device (10), in particular for motor vehicles, is proposed, which predetermines a corrected guidance variable (F) by determining a correction variable (K) so that the regulating deviation of the control circuit becomes approximately zero. In order to regulate the position (X) of at least one wiper (16) that oscillates between two end positions (18.1, 18.2, 18.3), the windshield wiper device (10) includes an electronically reversible drive motor (14) and a regulating unit (12), which compares a regulation variable (R) to a guidance variable (F) and regulates the motor (14) by means of a control variable (S), wherein the deviation between the guidance variable (F) and the regulation variable (R) and/or other parameters, e.g. the control variable (S) or variables derived from the regulation variable (R), is used to calculate a correction variable (K) with which the guidance variable (F) can be corrected.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: November 21, 2000
    Assignee: Robert Bosch GmbH
    Inventors: Gebhard Michenfelder, Michael May
  • Patent number: 6147466
    Abstract: A synchronization system according to the present invention includes a signal generator that provides a "RUN" signal simultaneously to two or more windshield wiper motors in response to simultaneous receipt of position signals generated by the motors. Each motor generates a position signal when the windshield wiper controlled by the motor is at a predetermined position. A gate circuit monitors the output of each motor to determine whether the motor is in the predetermined position. The gate circuit provides a trigger signal to the signal generator of the present invention only when each motor outputs a position signal. The trigger signal causes the signal generator to produce a subsequent "RUN" signal initiating another wipe cycle. Accordingly, the motors begin each cycle in synchronization.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: November 14, 2000
    Assignee: Commercial Vehicle Systems, Inc.
    Inventor: Steven J. Stronczek
  • Patent number: 6144906
    Abstract: An intelligent wiper system and method for wiping a windshield is disclosed having a microprocessor which controls the operation of a motor and which is capable of setting a baseline delay time using one or more wipe times, with the baseline delay time generally corresponding to a time interval between consecutive wipes of at least one wiper blade. The system and method automatically adjusts the baseline delay time in response to the second wipe time if the second wipe time is not substantially the same as a function of the first wipe time, wherein the function includes a predetermined constant which is at least one hundred percent of a first wipe time. An upper baseline wipe time threshold and a lower baseline wipe time threshold may be established such that the delay time is not adjusted if a current wipe time falls between such thresholds.
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: November 7, 2000
    Assignee: Valeo Electrical Systems, Inc.
    Inventors: Harry C. Buchanan, Jr., Richard L. Ponziani, Joseph P. Whinnery
  • Patent number: 6124691
    Abstract: A moisture sensor for detecting moisture on the surface of a transparent material. The moisture sensor includes one or more emitters for producing moisture sensing signals which are influenced by moisture on the transparent material, and one or more detectors for receiving the moisture sensing signals and producing a detector output signal. The moisture sensor further includes a pre-demodulation gain and filtering circuit having high order filtering for removing most of the unwanted ambient light noise and EMI interference from the detector output signal for the accurate detection of moisture in the presence of noise.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: September 26, 2000
    Assignee: Libbey-Owens-Ford Co.
    Inventor: Rein S. Teder
  • Patent number: 6121741
    Abstract: A control device operates a window wiper in a motor vehicle, and includes a switching device for the selection of several wiping functions, a sensor device for determining a wetting degree of a window, and an electronic analyzing system. The window wiper is capable of being operated, depending on the wiping function selected by the user, in a continuous wiping operation and/or in a single wiping operation. The electronic analyzing system, during a first wiping function, analyzes the determined wetting degree of the window and, depending on the determined wetting degree of the window, in a continuous wiping operation, sets a wiping frequency and/or, in a single wiping operation, activates a wiping cycle for the window wiper.
    Type: Grant
    Filed: June 16, 1998
    Date of Patent: September 19, 2000
    Assignee: DaimlerChrysler AG
    Inventors: Josef Berger, Alf Blessing, Rainer Maeckel, Roland Mauser
  • Patent number: 6121738
    Abstract: Proposed is a control device (50) for a windshield wiper that serves in actuating a further window wiper. The control device (50), having an inventive embodiment, includes a control (18), whose signal output (20) provides first control signals (42) for actuating the windshield wiper, preferably a front windshield wiper (26) of a motor vehicle, and whose further signal output (22) provides further control signals (42) for actuating a further windshield wiper, preferably a rear window wiper (30).
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: September 19, 2000
    Assignee: Robert Bosch GmbH
    Inventors: Hans Meier, Guenther Riehl, Henry Blitzke, Manfred Burkart
  • Patent number: 6111378
    Abstract: A window wiper motor system for an automotive vehicle includes an incremental wiper position detection device. A window wiper feedback pattern is disposed on a stationary circuit board mounted within a gear enclosure with its electronic components facing inwardly toward a main gear. A low profile, flip chip integrated circuit attachment to the printed circuit board is also provided.
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: August 29, 2000
    Assignee: UT Automotive Dearborn, Inc.
    Inventors: Philip LeMay, H. Winston Maue
  • Patent number: 6100657
    Abstract: An electric motor drive for an automotive operating element for moving between at least two end positions. A range about at least one selected position of the operating element is established. The drive automatically moves the operating element into the selected position when the automotive operating element has reached the established range.
    Type: Grant
    Filed: May 7, 1998
    Date of Patent: August 8, 2000
    Assignee: Robert Bosch GmbH
    Inventors: Hubert Lamm, Guenter Haderer
  • Patent number: 6097024
    Abstract: A control system for automatically detecting moisture on the windshield of a vehicle. The automatic moisture detecting system includes an optical system for imaging a portion of the windshield on to an image array sensor, such as a CMOS active pixel sensor. The voltages of each of the pixels which represents the illumination level is converted to a corresponding gray scale value by an analog digital converter. The gray scale values corresponding to the image are stored in memory. The spatial frequency composition of the gray scale values are analyzed to determine the amount of rain present. In order to provide a control signal to control the operation of the windshield wipers of the vehicle as a function of the amount of moisture present. The system is also adapted to detect the level of fog both on the interior of the windshield as well as the exterior of the windshield.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: August 1, 2000
    Assignee: Gentex Corporation
    Inventors: Joseph S. Stam, Jon H. Bechtel, John K. Roberts
  • Patent number: 6072295
    Abstract: A windshield wiping device includes a control amplifier 5 for controlling a wiper motor 7 in accordance with a driver's operation of a wiper switch 3. When a vehicle is energized, the control amplifier 5 once outputs a working inhibition signal to a working inhibition relay 15 in order to stop the operation of the wiper. Thus, it is possible to avoid the wiper's working against the driver's will immediately after a key switch has been switched on. When the vehicle begins to travel or the position of the wiper switch 3 is changed by the driver, then the wiper is activated in accordance with the position of the wiper switch 3.
    Type: Grant
    Filed: December 1, 1998
    Date of Patent: June 6, 2000
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Kiichi Kusunoki
  • Patent number: 6069461
    Abstract: The use of a Gray code ganged wiper switch and an electronic circuit controlling the washer-pump motor and wiper motor allow the use of a minimal number of wires in the overall interval wiper system than found in conventional systems. Circuit redundancy and Gray coding method provides several added reliability features at a low manufacturing cost. The system further provides a resistorless control of the several power output functions of the system.
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: May 30, 2000
    Assignee: Ford Global Technologies, Inc.
    Inventors: David Joseph Jaworski, Mark Christian Aaron, Michael J. Buchanan, Kenneth George Slotkowski
  • Patent number: 6057660
    Abstract: A device which determines a condition of at least one wiper blade of a motor-vehicle windshield wiper. The device includes a rain sensor controlling the motor-vehicle windshield wiper and being utilized for determining the condition of the wiper blade. The device also includes an evaluation circuit receiving data from the rain sensor. The evaluation circuit evaluates wear and tear of a rubber wiper element of the wiper blade based on one of a slow and continuous change of the data and a quick and continuous change of the data provided by the rain sensor.
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: May 2, 2000
    Assignee: Robert Bosch GmbH
    Inventors: Hans Meier, Guenther Riehl, Henry Blitzke
  • Patent number: 6040667
    Abstract: A wiper system and method for use in a wiper system on a vehicle, such as an automobile, a truck, an agricultural vehicle, and the like is shown having a wiper motor having a drive shaft which is driven at a substantially linear rate. A first gear is cooperatively coupled to the output shaft and driven thereby at the linear rate. A second gear is coupled to the first gear and it is driven in response to the movement of the drive shaft. The second gear is operatively coupled to a third gear which drives a crank which is coupled to a plurality of wiper blades via suitable linkage. The system and method are have at least one gear which is non-symmetrical about its axis which enables or cause the crank to be driven at a non-linear rate relative to the rate of the drive shaft.
    Type: Grant
    Filed: December 12, 1995
    Date of Patent: March 21, 2000
    Assignee: Valeo Elecrical Systems, Inc.
    Inventor: John Christopher Watts
  • Patent number: 6028408
    Abstract: A control device associated with a wiper motor for motor vehicles, in particular a rear window wiper motor the control device permitting a rapid final test of the motor with virtually no delay. For this purpose, a certain test signal is fed to a control unit via a signal input in response to which test signal the control unit electrically charges the motor for a test mode over an extended period.
    Type: Grant
    Filed: February 22, 1999
    Date of Patent: February 22, 2000
    Assignee: Robert Bosch GmbH
    Inventor: Ansgar Grass
  • Patent number: 6020704
    Abstract: An apparatus for detecting moisture on the windscreen of a motor vehicle has an illumination source and a light sensor mounted within the motor vehicle. The light sensor detects light rays from the light source reflected off the windscreen via a diffusion surface within the motor vehicle. Based upon the sensed reflected light, an image processor in communication with the light sensor creates an image of a portion of the windscreen that the processor analyzes to determine the moisture condition of the windscreen.A method for controlling the operation of the windscreen wiper system monitors light reflected from a portion of a windscreen and creates an image of the moisture condition of the windscreen based on the reflected light. The image is analyzed to determine the configuration of light intensities in predetermined zones. From the light intensity configuration, the moisture condition of the windscreen is determined.
    Type: Grant
    Filed: December 2, 1997
    Date of Patent: February 1, 2000
    Assignee: Valeo Electrical Systems, Inc.
    Inventor: Jeffrey J. Buschur
  • Patent number: 6011369
    Abstract: Windshield wiper mechanism and method for precisely placing a wiper in each reversing position during wiper operation. The local wetness conditions on the windshield after deactivating the motor are taken into account from braking until reaching the reversing positions. The mechanism also includes a pulse generator for generating pulses as a function of the wiper movement, with these pulses being supplied to a controller via a signal input in order to control the motor. The pulses characterizing deceleration of the wiper from the time the motor is deactivated prior to a reversing position until it comes to a standstill are counted by a counter. The controller emits a switching signal for deactivating the motor and/or for reversing its direction of rotation prior to reaching the next reversing position or parking position as a function of the counted deceleration pulses.
    Type: Grant
    Filed: May 12, 1999
    Date of Patent: January 4, 2000
    Assignee: Robert Bosch GmbH
    Inventor: Ansgar Grass
  • Patent number: 6002229
    Abstract: A device for operating a windshield wiper with an automatic wiper control. The wiping operation is optimally adapted to the wetting conditions of a windshield as soon as the automatic wiper control is turned on. This is achieved by a control stage which, during the switching on, triggers at least one initial wiping action when responding to an activation signal emitted by an input stage. Following the initial wiping action, the wiping operation takes place on the basis of the wetting conditions detected by the sensor unit.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: December 14, 1999
    Assignee: Robert Bosch GmbH
    Inventors: Rainer Pientka, Henry Blitzke, Joerg Buerkle
  • Patent number: 5998949
    Abstract: A direct drive type rear wiper in which normal and reverse rotation of a motor causes reciprocating wiping operation of a wiper blade of a vehicle such as an automobile, comprising a motor 1 which rotates in normal and reverse directions, a worm wheel 2 which rotates being interlocked with the motor 1, a relay plate 3 which rotates being interlocked with the worm wheel 2, four contacts S1-S4 provided facing the relay plate 3, and a control circuit 4 for switching direction of electric current for the motor 1. In particular, when the motor 1 is to be stopped at a turning position in reciprocating wiping operation of the wiper blade, electric braking is made to act directly on the motor 1 according to contacting condition between the relay plate 3 and the first and second contacts S1, S2.
    Type: Grant
    Filed: June 26, 1998
    Date of Patent: December 7, 1999
    Assignee: Mitsuba Corporation
    Inventor: Toshiyuki Amagasa
  • Patent number: 5998883
    Abstract: A wiper control device includes a wiper switch having a variable resistor which is switched to the respective resistance value corresponding to the respective operation mode of the wiper apparatus. An interface circuit is provided with a reference resistor and a capacitor. A microcomputer is provided with a reference charging port for changing the capacitor through the reference resistor, a detective charging port for changing the same capacitor through the variable resistor switched into various resistance values corresponding to the respective operation modes and a reading port for reading as to whether the capacitor is changed up to a predetermined potential level. The microcomputer determines the selected operation mode on the basis of a relative value calculated from the time required for charging the capacitor through the reference resistor by the reference charging port and the time required for charging the capacitor through the variable resistor of the wiper switch by the detective charging port.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: December 7, 1999
    Assignee: Jidosha Denki Kogyo Kabushiki Kaisha
    Inventors: Haruo Yamazaki, Eisaku Hori, Yasuki Matsumoto
  • Patent number: 5990647
    Abstract: A sensor for detecting moisture on an outside surface of a windshield is disclosed. The sensor includes an emitter circuit for emitting light energy, and a detector circuit for receiving light energy. A processor controls the emitter circuit and processes signals received from the detector circuit. A self test circuit is connected between the processor and the emitter circuit, the self test circuit is operably associated with the emitter circuit for generating a test signal for simulating the presence of moisture on the outside surface of the windshield.
    Type: Grant
    Filed: October 29, 1998
    Date of Patent: November 23, 1999
    Assignee: Kelsey-Hayes Co.
    Inventor: Gerard J. Zettler
  • Patent number: 5973464
    Abstract: An apparatus for intermittently controlling windshield wipers, comprising a setting switch which is capable of being manually activated, a microconller responsive to the activation of the setting switch, means for programming a time interval into the microcontroller in response to activation of said setting switch, whereby the microcontroller initiates a sweeping action of the windshield wipers corresponding to the time interval between activations of the setting switch and continues to initiate a sweeping action of the windshield wipers during the programmed time interval until a subsequent activation of the setting switch, and, either means for decreasing the time interval after setting of the programmed time interval by a single subsequent activation of the setting switch or means for increasing the time interval after setting of the programmed time interval by two subsequent activations of the setting switch. A method for intermittently controlling windshield wipers is also disclosed.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: October 26, 1999
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Ronny C. Robbins
  • Patent number: 5969493
    Abstract: The invention relates to an apparatus for operating a windshield wiper, having a sensor device for detecting the state of wetness of a windshield, an evaluation device that receives the sensor signal and an actuating unit for the windshield wiper that can be actuated by the evaluation device to effect suitable wiping operation. Even when individual drops impact the windshield, appropriate wiping operation can be initiated during a drying phase of the windshield, because it is provided that current measured values of the sensor signal can be supplied to both the difference-initiating stage and a drop-recognition device that is provided in the evaluation device and in which the sensor signal can be evaluated with respect to individual drops using signal breaks, and that an adapted control signal can be generated by the control-signal-generating stage when a minimum signal break is detected, with which signal corresponding wiping operation can be initiated by way of the actuating unit.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: October 19, 1999
    Assignee: Robert Bosch GmbH
    Inventors: Rainer Pientka, Henry Blitzke, Joerg Buerkle
  • Patent number: 5925997
    Abstract: A drive circuit system includes an opening control circuit Eo adapted to close an opening relay to drive a motor in a window opening direction by operation of a control switch to an opening position, and a closing control circuit Es adapted to close a closing relay to drive the motor in a window closing direction by operation of the control switch to a closing position. The opening control circuit Eo and the closing control circuit Es include final output stage transistors To and Ts, respectively, each of which comprises a PNP-type transistor. When the drive circuit system becomes wet due to the entry or condensation of water or liquid, a leak current I is permitted to flow simultaneously between bases of the final output stage transistors To and Ts and ground 2. Both of the transistors To and Ts are simultaneously turned on to close the opening relay and the closing relay.
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: July 20, 1999
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventor: Koji Yamaoka
  • Patent number: 5923137
    Abstract: In a wiper system using a reversible motor for reciprocating angular movement of a wiper arm, a separate relay and a separate position detecting segment are used for selectively defining a path for regenerative braking. Because the third relay and the third position detecting segment are provided separately from those used for controlling the power supply of the electric motor, and are therefore relatively free from any large time constant, it is possible to start the regenerative braking action at a prescribed angular location without involving any substantial time lag so that the wiper arm can be stopped at a prescribed angular position at each terminal point at high precision at all times.
    Type: Grant
    Filed: February 7, 1997
    Date of Patent: July 13, 1999
    Assignee: Mitsuba Corporation
    Inventors: Toshiyuki Amagasa, Ryoji Shagawa
  • Patent number: 5920167
    Abstract: A detection device has a transducer (10) for emitting and receiving series of ultrasonic pulses. An integrator (23) integrates echo signals resulting from ultrasonic pulses within a time window so as to produce an integral value. A time-delay circuit (28) is used to control the instant of opening T1 of a time window and a control circuit (25) determines an average value of a number of n integral values and for loading the values of the opening a instant T1 into the time-delay circuit (28) so as to maintain the average value at a steady value. The control circuit (25) determines the average value by loading a first value of T1 in the time-delay circuit before the integration of the first x echo signal and a second value of T1 in the time-delay circuit before the integration of the second n-x echo signals.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: July 6, 1999
    Assignee: Asulab, S.A.
    Inventors: Fridolin Wiget, Eric Saurer
  • Patent number: 5920165
    Abstract: A unique electrical control for a defroster has a resistive electrical filament strip and a bi-directional motor having a H-bridge drive. The defroster filament may be simultaneously operated to warm a window or mirror and function as a power or current dissipating resistance to prevent a short circuit within the H-bridge drive.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: July 6, 1999
    Assignee: UT Automotive Dearborn, Inc.
    Inventor: H. Winston Mane
  • Patent number: 5917298
    Abstract: An electric motor control system for a motor vehicle rear wiper assembly. The system includes an electric motor including a motor housing. A gear mechanism is coupled to the electric motor to selectively connect the motor to a motor application. A plurality of resistive contacts are located either on the motor housing or on the gear mechanism and are arranged in a predetermined resistance pattern to indicate motor operational data. A controller is connected to the motor and is programmed to control operation of the motor. A contact mechanism is connected opposite the resistive contacts either on the gear mechanism or the motor housing to selectively contact one of the plurality of resistive contacts dependent upon a selected motor application. A resistance measuring device is connected between the wiper and the controller to generate a sensed resistance signal and communicate the sensed resistance signal to the controller for motor control purposes. Exact output location can be determined at any time.
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: June 29, 1999
    Assignee: UT Automotive Dearborn, Inc.
    Inventor: Robin Mihekun Miller
  • Patent number: 5900821
    Abstract: In a rain sensor system for a motor vehicle, a sensor element is provided as separate part for attachment in the vicinity of a vehicle window. The sensor element is wiped by a separate wiper blade which is fastened to a windshield wiper or driven by the latter. As a function of the a degree of wetness present on its top, the sensor element supplies electric signals to an evaluation electronics. Above a limit value of the signals, the evaluation electronics connects the windshield wiper.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: May 4, 1999
    Assignee: VDO Adolf Schindling AG
    Inventor: Sven Petzold
  • Patent number: 5896018
    Abstract: A device for operating a windshield wiper with an automatic wiper control. A fast reaction to a suddenly occurring heavy wetting event is assured without adversely affecting the sequence of intermittent wiper operation. This is achieved by an evaluation unit which has a surge detection stage that makes it possible to detect, during intermittent operation when a sensor signal falls short of a surge threshold and by triggering a control signal for at least one wiping action when the signal falls short of the surge threshold.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: April 20, 1999
    Assignee: Robert Bosch GmbH
    Inventors: Rainer Pientka, Henry Blitzke, Joerg Buerkle
  • Patent number: 5892343
    Abstract: A windshield wiping arrangement with at least one wiper arm (11) is disclosed, which is operated by an electromotor (10) with reversible rotational direction. A time determination device (19) is provided, which determines the time (T.sub.n ; T.sub.n+1 ; T.sub.n+2 ; T.sub.n+3 ; T.sub.n+4) following the triggering of a wiping operation. Furthermore, a time presetting device (22) is provided, which presets a maximum allowable time (T.sub.max ; T.sub.max,n+1 ; T.sub.max,n+2 ; T.sub.max,n+3) for the duration of half of a wiping cycle. A comparator (21) detects a possibly existing time overrun and, with a time overrun signal (27), triggers a wiping operation in the opposite direction relative to the preceding wiping operation by reversing the electromotor (10). The windshield wiping arrangement according to the invention makes it possible to maintain a limited wiping operation when a blocking occurs (B1, B2, B3), as can be caused, for example, by a snow load on a windshield to be cleaned.
    Type: Grant
    Filed: January 9, 1997
    Date of Patent: April 6, 1999
    Assignee: Robert Bosch GmbH
    Inventors: Rolf Mack, Stefan Koch
  • Patent number: 5872437
    Abstract: A arrangement for operating a windshield wiper in a direct mode, an intermittent mode or a continuous mode, having a sensor device for detecting a degree of moisture on the windshield, an evaluation device for the sensor signal and an actuation unit for the windshield wiper. A non-disturbing smoothing of the interval times is accomplished in a simple manner in that an interval time control has a smoothing stage for the interval time with which it can be determined during which time segment of predetermined time segments within the interval time a wetting event occurs, starting from the beginning of the interval, and with which the second interval time can be shortened all the more, the earlier the time segment appears during which the wetting event occurs.
    Type: Grant
    Filed: January 16, 1997
    Date of Patent: February 16, 1999
    Assignee: Robert Bosch GmbH
    Inventors: Rainer Pientka, Henry Blitzke, Joerg Buerkle
  • Patent number: 5861723
    Abstract: A windscreen wiper device includes at least one wiper arm (10) that is driven by an electric motor (11), whose rotary direction is variable at least in the respective extreme position. Upon the change of rotary direction, the electrical power made available to the electric motor (11) is reduced. The rated power is not made available until either a specified time has elapsed or a specified position of the wiper arm (10) has been reached. For specifying a reduced electrical power, a reduction in the current flowing through the electric motor (11) is especially well-suited. The windscreen wiper device according to the invention makes for a slight thermal load on both the electric motor (11) and the drive stage (19).
    Type: Grant
    Filed: August 15, 1996
    Date of Patent: January 19, 1999
    Assignee: Robert Bosch GmbH
    Inventor: Stefan Koch
  • Patent number: 5847654
    Abstract: An apparatus for operating a windshield wiper having an automatic wiper control. The apparatus is provided with a rain sensor having a light-emitting transmitter and a receiver that responds to the emitted light by emitting a sensor signal, and an evaluation device for the sensor signal. The evaluation device has a microcomputer and a capacitor that is outside of the microcomputer and to which the sensor signal is supplied. Also included is a comparator connected to the capacitor for comparing the voltage built up at the capacitor by the sensor signal to a threshold voltage and for emitting an output signal if the threshold voltage is exceeded. The microcomputer forms a measured value from the output signal, the value of which correspond to a time at which the threshold is exceeded.
    Type: Grant
    Filed: February 3, 1997
    Date of Patent: December 8, 1998
    Assignee: Robert Bosch GmbH
    Inventor: Norbert Hog
  • Patent number: 5844389
    Abstract: The invention relates to an apparatus for operating a windshield wiper, having a sensor device for detecting the state of wetness of the windshield, an evaluating device that receives the sensor signal and in which an adjusting device is provided for updating a reference value, and an actuator unit for the windshield wiper that is actuated by the evaluating device for initiating a wiping process if the difference between the reference value and a current measured value exceeds a predetermined threshold value. The evaluation and analysis of an event that influences the sensor signal, such as a slow buildup on the windshield under drizzly or foggy conditions, are facilitated by the fact that the adjusting device includes at least one adjusting stage whose time constant is in an order of magnitude of one second to a few seconds, and that the reference value can be followed step-wise, taking into consideration all current measured values received at intervals of fractions of a second.
    Type: Grant
    Filed: June 11, 1997
    Date of Patent: December 1, 1998
    Assignee: Robert Bosch GmbH
    Inventors: Rainer Pientka, Henry Blitzke, Joerg Buerkle