Variable Periods Or Intervals Between Controlling Operations Patents (Class 318/444)
  • Patent number: 7420346
    Abstract: The invention relates to a drive arrangement of a wiper device for windows of motor vehicles with at least two swivel-mounted wiper arms (18, 20) that are connected to one another via a crank mechanism, wherein one of the wiper arms (18) is directly coupled with a driven shaft (16) of an electromotive drive (10).
    Type: Grant
    Filed: July 11, 2003
    Date of Patent: September 2, 2008
    Assignee: Robert Bosch GmbH
    Inventor: Ulrich Metz
  • Patent number: 7392565
    Abstract: A tandem windshield wiper system including a first windshield wiper assembly having a first lever arm that is adapted to operatively move in a repeated wiping motion across the surface of a windshield. A second windshield wiper assembly having a second lever arm is spaced apart from the first windshield wiper assembly and is rotatable about a second wiper longitudinal axis and adapted to operative move in a repeated wiping motion across the surface of the windshield. A brushless DC motor that includes a planetary gear set having an output shaft is disposed between the first and the second wiper assemblies. The gear set is operable to reduce the speed of the rotational output of the motor through the output shaft of said gear set. A bellcrank having a central attachment point and a first and a second end is also included. The central attachment point is fixedly mounted to the output shaft of the motor.
    Type: Grant
    Filed: May 5, 2004
    Date of Patent: July 1, 2008
    Assignee: Trico Products Corporation
    Inventors: David L. Holbrook, Michael W. Wilson, Arman Moein, David Emery Peck
  • Patent number: 7389561
    Abstract: A tandem windshield wiper system that includes at least one brushless DC motor to provide drive torque through an output that is rotatable about the longitudinal axis of the motor. A first windshield wiper assembly having a first lever arm is driven by the motor about the longitudinal axis in a repeated wiping motion across the surface of a windshield. A second windshield wiper assembly spaced apart from the first windshield wiper assembly has a second lever arm and is rotatable about a second longitudinal axis to operative move in a repeated wiping motion across the surface of the windshield. A connecting arm is also included that is operatively disposed between the first and the second lever arms that is adapted to translate the drive torque provided to the first windshield wiper assembly to the second windshield wiper assembly. The motor includes a planetary gear set having an output shaft.
    Type: Grant
    Filed: May 5, 2004
    Date of Patent: June 24, 2008
    Assignee: Trico Products Corporation
    Inventors: John Bledsoe, Arman Moein, David Emery Peck
  • Patent number: 7345444
    Abstract: A window washer control system and method administers fluid intermittently to a window based on an intermittent setting. A washer switch includes a plurality of frequency settings for varying a time interval between fluid administering events. The fluid level in a washer fluid reservoir is monitored to ensure a predetermined level. If the fluid level is below a predetermined level, control prevents intermittent washer administration and allows only manual activation.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: March 18, 2008
    Assignee: General Motors Corporation
    Inventors: Phillip M Turner, Yueh-Se J Huang, Pei-Chung Wang
  • Patent number: 7345445
    Abstract: A wiping system for use on a vehicle window comprises a window wiper assembly positioned proximate the window, a first sensor for detecting the presence of moisture on the window and a second sensor for detecting if the vehicle has been remotely started. A controller is coupled to the wiper assembly and to the first and second sensors and enables the wiper assembly when the vehicle has been remotely started and moisture is present on the window. The wiping system also comprises a third sensor for detecting the presence of moisture on the window, a fourth sensor for detecting vehicle shut-down, and a fifth sensor for sensing the temperature of the window. The controller is coupled to each of the third, fourth, and fifth sensors and enables the wiper assembly when the vehicle has been shut-down for less than a predetermined period of time, the temperature of the window exceeds a temperature threshold, and moisture is detected on the window.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: March 18, 2008
    Assignee: General Motors Corporation
    Inventor: Fred W. Huntzicker
  • Patent number: 7323842
    Abstract: A rotating electrical machine has a housing with a shaft mounted rotatably in it. A rotor is fixed to the shaft and has a plurality of magnetic poles. A stator is positioned about the rotor and has a winding. A switch is mounted within the housing and has a first position for allowing current in one direction through the winding and a second position for allowing current in an opposite direction through the winding. A mechanical activator is movable with or by the shaft and acts on the switch to move it between the first and second positions.
    Type: Grant
    Filed: November 27, 2003
    Date of Patent: January 29, 2008
    Assignee: Dolphin Electric Holdings, Inc.
    Inventors: Tony Elijah Muldowney-Colston, Thomas Mahon Shaw
  • Patent number: 7307395
    Abstract: The invention concerns a sequential safety system associated with a moving closing panel driven so as to slide by an electric motor (6), this safety system including means (20) exploiting the signal originating from an optical fiber to stop and reverse the direction of movement of said moving panel in the event of a change in the signal, as well as additional safety means allowing the end-of-travel positions of the moving panel to be determined without ambiguity via the joint exploitation of the results derived from measuring the frequency of the pulses caused by the rotation of the electric motor (6) driving said moving panel, as well as data originating from the optical fiber.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: December 11, 2007
    Assignee: Talltec Technologies Holdings S.A.
    Inventors: Mohamed Bouamra, Jésus Zaldua, Javier Vicandi, Jésus Iriondo
  • Patent number: 7298110
    Abstract: An integrated motor monitoring system includes a housing and a motor disposed within the housing, the motor being configured to provide a power output. The integrated motor monitoring system also includes at least one monitoring device communicatively coupled to the motor and configured to monitor an operational aspect of the motor and generate a data signal associated with the operational aspect. The integrated motor monitoring system further includes a controller, disposed within the housing and in communication with the at least one monitoring device, and configured to energize a plurality of field conductors of the motor and receive the data signal from the at least one monitoring device over at least one of the plurality of field conductors.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: November 20, 2007
    Assignee: Caterpillar Inc.
    Inventor: Robert Wayne Lindsey
  • Patent number: 7294986
    Abstract: A reversing wiper motor system has a first detector including a detectant which rotates in synchronism with the wiper. The detector physically identifies a plurality of distinct angular zones across the entire range of motion of the wiper, including a wiper park zone, a wiping zone, and a wiper out-of-bound zone. A second detector detects incremental movement of the wiper within any given zone. Control circuitry controls the direction of the motor based on the detected zone and the incremental motion of the wiper therein. The system enables the wiper to be located upon power-up.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: November 13, 2007
    Assignee: Intier Automotive Closures Inc.
    Inventor: Leslie Marentette
  • Patent number: 7259532
    Abstract: An MCU monitors changes in motor rotating speed from the motor start so as to detect a peak of the motor rotating speed, and when the peak of the motor rotating speed is detected, it measures a period of time Ta from the motor start to the time, at which the decreasing rate of the motor rotating speed becomes maximal, so as to establish the activation/cancellation time period by adding a time Tb that is a predetermined numerical-fold door vibration period to the time Ta. When a second peak with more than a predetermined amount of the motor rotating speed is detected after the first peak detection, the activation/cancellation time period is established by adding a time Tb1 that is a predetermined numerical-fold door vibration period to the activation/cancellation time period obtained before.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: August 21, 2007
    Assignee: Alps Electric Co., Ltd.
    Inventor: Akihiko Shinohara
  • Patent number: 7248010
    Abstract: A wiper controller includes: a sensor for detecting a waterdrop on a windshield; a wiper for wiping the windshield; and control means for controlling operation of the wiper. The control means monitors a waterdrop reflection when the sensor detects the waterdrop. The waterdrop reflection is a diffuse reflection of light. The control means operates the wiper with an intermittent wiping operation having a time interval in such a manner that the time interval in a case where the control means decides nonexistence of the waterdrop reflection is set to be longer than the time interval in a case where the control means decides existence of the waterdrop reflection.
    Type: Grant
    Filed: January 19, 2006
    Date of Patent: July 24, 2007
    Assignee: DENSO Corporation
    Inventor: Katsunori Michiyama
  • Patent number: 7199541
    Abstract: A method for controlling an electric motor for an automobile wiper system includes a calibration curve in which data is converted into the angular value of the position of an output shaft and a correction is made depending upon a direction and magnitude of deviations. The electric motor has a stator with a lid with permanent magnets and the output shaft has a worm wheel with pole extensions of permanent magnets and a sensor of the angular position of the output shaft.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: April 3, 2007
    Assignee: IQI s.r.o.
    Inventors: Jaroslav {hacek over (S)}pi{hacek over (c)}ka, Vladimir {hacek over (S)}ulc
  • Patent number: 7199346
    Abstract: A control system is disclosed 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 onto an image array sensor, such as a CMOS active pixel sensor. The voltage of each of the pixels which represents the illumination level is converted to a corresponding gray scale value by an analog digital converter. 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: September 20, 2005
    Date of Patent: April 3, 2007
    Assignee: Gentex Corporation
    Inventors: Joseph S. Stam, Jon H. Bechtel, John K. Roberts
  • Patent number: 7173395
    Abstract: A circuit system that includes a sensor circuit for a sensor that detects the state of a motor is provided in an inverter unit for driving the motor. A 0V of the circuit system is connected with a shield braid of a shielded cable that connects the sensor circuit and the sensor. Further, the shield braid of the shielded cable is connected to an earth plate.
    Type: Grant
    Filed: January 29, 2004
    Date of Patent: February 6, 2007
    Assignee: Fanuc Ltd
    Inventors: Shunsuke Matsubara, Shinichi Kono, Shinichi Horikoshi
  • Patent number: 7171718
    Abstract: A windshield wiper assembly including at least one motor having an output shaft and a windshield wiper operatively connected to the output shaft. The motor includes a stator adapted to provide an electromagnetic flux and a rotor assembly supported for rotation about the stator. The rotor assembly includes a back iron and an annular magnet mounted to the back iron so as to be disposed in radially spaced relationship about the stator. The rotor assembly is operatively connected to the output shaft and responsive to electromagnetic flux generated by the stator so as to provide a rotational force to the output shaft to drive the windshield wiper in repeated wiping motion across the windshield.
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: February 6, 2007
    Assignee: TRICO Products Corporation
    Inventors: Arman Moein, David Emery Peck
  • Patent number: 7116072
    Abstract: A method and system for setting a downward force adjustment exerted by a barrier is disclosed. As is known, the barrier operator initiates corrective action if a detected obstruction force is deemed excessive. The inventive method and system comprises pre-setting a force threshold value used by the barrier operator. While in a programming mode, the barrier is moved from one limit position to another limit position. A recorded value is determined during the moving of the barrier and the threshold value is adjusted until equal the recorded value. A feedback device such as a light or a speaker is used to indicate when the threshold value is at least equal the recorded value.
    Type: Grant
    Filed: June 24, 2004
    Date of Patent: October 3, 2006
    Assignee: Wayne-Dalton Corp.
    Inventors: James S Murray, Richard E Gagnon
  • Patent number: 7098618
    Abstract: A rain detection system generates an operation signal for operating a wiper system on a window based on a detected window condition. The rain detection system includes a detection mechanism for intermittently detecting an amount of liquid on the window, a calculation mechanism for calculating an increase rate of the amount of the liquid detected in a detection operation by the detection mechanism and a determination mechanism for determining the window condition based on the increase rate calculated by the calculation mechanism. The determination mechanism distinguishes difference between condensation on the window and rain based on the detected liquid on the window.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: August 29, 2006
    Assignee: DENSO Corporation
    Inventor: Taiji Morishita
  • Patent number: 7095199
    Abstract: An automatic vehicle wiper system including a wiper, a speed sensor which measures vehicle speed, a rainfall measuring device which measures amount of rainfall during predetermined intervals, a calculating device which calculates a wiping action frequency of the wiper as first data, depending on the amount of rainfall measured by the rainfall measuring device, a memory device which stores the first data calculated by the calculating device as second data when the vehicle speed measured by the speed sensor decreases to equal to or less than a predetermined value, and a wiping action frequency determining device which determines the wiping action frequency of the wiper by comparing the first data and the second data when the vehicle speed measured by the speed sensor becomes equal to or greater than a predetermined value after it has been confirmed that the vehicle has stopped.
    Type: Grant
    Filed: September 12, 2005
    Date of Patent: August 22, 2006
    Assignee: Honda Motor Co., Ltd.
    Inventors: Motohisa Hirose, Takashi Kondo, Masaaki Nakai, Taizo Kikuchi
  • Patent number: 7019275
    Abstract: The system of the present invention is configured to detect moisture on a surface and includes a sensor that may be divided into a plurality of subwindows. At least one of the subwindows has a sensitivity that is independently variable. The system may further include an optical system operative to direct light rays from at least a portion of the surface onto the sensor, and a processing system in communication with the sensor and operative to independently adjust the sensitivity of the at least one subwindow and to analyze data from the sensor to detect moisture. The processing system may control the windshield wipers based upon a number of subwindows in which moisture is detected.
    Type: Grant
    Filed: January 19, 2004
    Date of Patent: March 28, 2006
    Assignee: Gentex Corporation
    Inventors: Joseph S. Stam, Harold C. Ockerse, Charles David Kibler, IV
  • Patent number: 7009356
    Abstract: The wiper control apparatus comprises a precipitation detector, a surrounding state detector and a wiper controller. The precipitation detector detects a precipitation condition at a position where the vehicle is. The surrounding state detector detects an exit of the vehicle out of a roofed space. The wiper controller controls the wiper to be in an automatic operation mode according to the precipitation condition detected by the precipitation detector, and controlling the precipitation detector to detect the precipitation condition following the exit detected by the surrounding state detector in a response time shorter than the normal response time for the precipitation detector to detect the precipitation not following the exit.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: March 7, 2006
    Assignee: Denso Corporation
    Inventor: Katsunori Tanida
  • Patent number: 6958585
    Abstract: A windshield wiper system activated by sensing rainwater via a rain sensor placed inside the wiping pattern when a multifunction switch lever is in automatic mode. A rain sensor module activates a relay for low speeds and/or a relay for high speeds depending on the detected amount of rainwater. A first voltage detecting means detects battery voltage, a second voltage detecting means detects voltage of an automatic signal, and a microcomputer adjusts the sensitivity of the rain sensor based on a voltage ratio of the automatic signal voltage and the battery voltage. A reformed wiring structure connects the multifunction switch and the rain sensor module, which contributes to a reduction of the weight and cost of the wiring harness. The sensitivity of the rain sensor is not affected by a voltage change.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: October 25, 2005
    Assignee: Hyundai Motor Company
    Inventor: Ill-Soo Kim
  • Patent number: 6944906
    Abstract: A direct drive windshield wiper assembly including at least one brushless DC motor providing a drive torque through an output that is rotatable about the longitudinal axis of the motor and a windshield wiper that is driven by the motor about the longitudinal axis in a repeated wiping motion across the surface of a windshield. The motor including a planetary gear set having an output shaft, the gear set being coaxially disposed relative to the rotational output and the longitudinal axis of the motor and operatively interconnecting the drive torque and the windshield wiper, the gear set further operable to reduce the speed of the rotational output of the motor to the windshield wiper through the output shaft of the gear set.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: September 20, 2005
    Assignee: TRICO Products Corporation
    Inventors: Arman Moein, David Emery Peck
  • Patent number: 6946639
    Abstract: A control system is disclosed 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 onto an image array sensor, such as a CMOS active pixel sensor. The voltage of each of the pixels which represents the illumination level is converted to a corresponding gray scale value by an analog digital converter. 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: November 29, 2004
    Date of Patent: September 20, 2005
    Assignee: Gentex Corporation
    Inventors: Joseph S. Stam, Jon H. Bechtel, John K. Roberts
  • Patent number: 6940244
    Abstract: An apparatus, which engages wiper blades in operation by interlocking with an operation of a washer switch, drives the wiper blades at a high speed if the vehicle speed during the wiper blade operation is equal to or higher than a predetermined value. As a result, the washer fluid sprayed onto the windshield can be wiped away immediately when the vehicle is traveling at a high speed.
    Type: Grant
    Filed: January 28, 2004
    Date of Patent: September 6, 2005
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Yoshihiro Mitsumoto
  • Patent number: 6936985
    Abstract: A sensing device includes a piezoelectric vibration sensor mounted to a surface for producing an analog signal proportional to raindrops striking the surface, an amplifier, an analog-to-digital converter, and a processor for calculating the rain rate based on an exponential probability density function of a first order point process.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: August 30, 2005
    Assignee: AGC America, Inc.
    Inventors: Brent W. Pankey, Colin John Byrne, Mark S. Ackerman, Mitchell M. Rohde, William J. Williams
  • Patent number: 6917173
    Abstract: The wiper driving apparatus module includes: a motor 12 for driving a wiper unit; a wiper ECU 11 for driving the motor 12; a deceleration mechanism (including gears). The two brush DC motor is employed and driven by a pulse width modulation (PWM) signal, in place of the conventional three brush motor wherein brushes are changed in accordance with a wiper operation speed. Therefore, the number of windings is only a number required for a high speed operation of the wiper unit. The high speed operation is implemented by 100% duty PWM signal, while the low speed operation is implemented by reducing the duty. The PWM signal duty is changed in response to a rainfall, windshield surface state and wind pressure which cause the wiping speed fluctuation.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: July 12, 2005
    Assignee: Denso Corporation
    Inventor: Nobutomo Takagi
  • Patent number: 6911796
    Abstract: A power control device for positioning at a low voltage side of a load for controlling the electrical power available to the load, from a main power supply, the power control device including a current switch for switching current on and off under the control of a pulse width modulating device thus to control the power available to the load, the pulse width modulating device being operated by power derived from the main power supply.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: June 28, 2005
    Assignee: Westland Helicopters LTD
    Inventor: Morris Castro
  • Patent number: 6867559
    Abstract: In a wiper system for vehicles, in particular for automobile windshields, including a first wiper arm, a primary drive motor (12) associated with the wiper arm for generating a defined wiping motion of the first wiper arm, at least one second wiper arm, and a secondary drive motor (13) associated with the second wiper arm for generating a defined wiping motion of the second wiper arm, the secondary drive motor (13) being controlled as a function of the position of the primary drive motor (12), a motor position code element (23) is provided, which is coupled to the primary drive motor (12) and is provided with control codes (24) that are directly representative of the associated position of the secondary drive motor (13). For scanning the control codes (24) of the motor position code element (23), a scanner unit (25) is used, which via a signal connection (22) is connected to a controller (27) of the secondary drive motor (13).
    Type: Grant
    Filed: June 8, 2002
    Date of Patent: March 15, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Martin-Peter Bolz, Hartmut Krueger
  • Patent number: 6853897
    Abstract: The system of the present invention is configured to detect moisture on a surface and includes a sensor that may be divided into a plurality of subwindows. At least one of the subwindows has a sensitivity that is independently variable. The system may further include an optical system operative to direct light rays from at least a portion of the surface onto the sensor, and a processing system in communication with the sensor and operative to independently adjust the sensitivity of the at least one subwindow and to analyze data from the sensor to detect moisture. The processing system may control the windshield wipers based upon a number of subwindows in which moisture is detected.
    Type: Grant
    Filed: January 19, 2004
    Date of Patent: February 8, 2005
    Assignee: Gentex Corporation
    Inventors: Joseph S. Stam, Harold C. Ockerse, Charles David Kibler, IV
  • Patent number: 6802205
    Abstract: A moisture detection system includes an electrical conductor disposed on a surface of a substrate. The electrical conductor has a resonant frequency that varies as a function of an amount of moisture present adjacent the electrical conductor. An oscillator outputs an oscillator signal at a predetermined amplitude and a predetermined frequency. A resonator circuit is coupled to the electrical conductor and is responsive to the oscillator signal and the resonant frequency of the electrical conductor for outputting a resonator signal having an amplitude related to the resonant frequency of the electrical conductor. A filter circuit rectifies and filters the resonator signal and provides it to an analog-to-digital converter which outputs a digital signal related to the rectified and filtered resonator signal. A controller is responsive to the digital signal for causing a system associated with the substrate to operate in accordance with the digital signal.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: October 12, 2004
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Pascal Barguirdjian, Michel Haigron, Allan Rex Hawk, Kwaku Koi Koram
  • Patent number: 6800978
    Abstract: A contact-disk system is described having a rotatable contact disk and a plurality of contact elements, the contact disk having a plurality of paths and each contact element being assigned to one path. Two selected contact elements of the plurality of contact elements are always at the same electrical potential and glide on the same path. A windshield-wiper motor and a method for controlling a windshield-wiper motor are also described.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: October 5, 2004
    Assignee: Robert Bosch GmbH
    Inventor: Roland Bohn
  • Patent number: 6801006
    Abstract: The control device for a wiper device of a window wiper apparatus, especially of a motor vehicle, adapts set values of the wiping angle of the wiper arm to an actually measured operating point of the wiper arm during each wiper cycle. Because of that adaptation both over-wiping and also too little wiping of a wiped area by the wiper device is at least reduced so that the wiper accuracy particularly at the turning points of the wiper arm is improved. Furthermore a method for adjusting of a set value of the wiping angle of a wiper arm of a wiper device to actually existing operating conditions or to an actual operating point is provided.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: October 5, 2004
    Assignee: Robert Bosch GmbH
    Inventors: Johannes Moosmann, Hartmut Krueger
  • Patent number: 6791289
    Abstract: An intermittent driving mechanism is disclosed that includes a driving member having a slot formed in a channel. A driven member of the intermittent driving mechanism is rotatably coupled to the driving member and includes a pin that engages the slot after the driving member, when rotated, causes the pin of the driven member to enter the channel of the driving member.
    Type: Grant
    Filed: April 9, 2003
    Date of Patent: September 14, 2004
    Assignee: SPX Corporation
    Inventors: Sasha Long, James T. Stenberg
  • Publication number: 20040056620
    Abstract: The wiper driving apparatus module includes: a motor 12 for driving a wiper unit; a wiper ECU 11 for driving the motor 12; a deceleration mechanism (including gears). The two brush DC motor is employed and driven by a pulse width modulation (PWM) signal, in place of the conventional three brush motor wherein brushes are changed in accordance with a wiper operation speed. Therefore, the number of windings is only a number required for a high speed operation of the wiper unit. The high speed operation is implemented by 100% duty PWM signal, while the low speed operation is implemented by reducing the duty. The PWM signal duty is changed in response to a rainfall, windshield surface state and wind pressure which cause the wiping speed fluctuation.
    Type: Application
    Filed: September 5, 2003
    Publication date: March 25, 2004
    Inventor: Nobutomo Takagi
  • Patent number: 6703804
    Abstract: The invention concerns a method for controlling a motor vehicle wiper motor comprising steps which consist in: determining at least a range related to an operating parameter of the motor and capable of having several non null values; comparing said range with a predetermined threshold (high LS, low; HS, high INT, low LS, low INT); and controlling the motor on the basis of the result of the comparison. The range is determined when the rotor of the motor occupies a determining position corresponding to a predetermined point on a trajectory of a blade driven by the motor.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: March 9, 2004
    Assignee: Valeo Systemes d'Essuyage
    Inventors: Paul Courdier, Phillipe Gougeon
  • Patent number: 6690130
    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 mechanism, 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 the 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: Grant
    Filed: May 24, 2001
    Date of Patent: February 10, 2004
    Assignee: Robert Bosch GmbH
    Inventors: Hans-Georg Klug, Gebhard Michenfelder, Hans Meier, Henry Blitzke, Michael May
  • Patent number: 6686603
    Abstract: A raindrop detection apparatus has an amplifier circuit, including a plurality of resistors and resistor selection switches. The control circuit performs the first adjustment to an output of the amplifier circuit, roughly adjusting the output to a target value. The first adjustment is made by selecting one of or a combination of resistors. The control circuit then performs the second adjustment to the output, closely adjusting the output to the target value. The second adjustment is made by adjusting a driving instruction signal, which actually adjusts a light emitting device driving current. These adjustments are performed after an IG switch and an AUTO mode switch of a wiper switch are turned on.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: February 3, 2004
    Assignee: Denso Corporation
    Inventor: Junichi Ishikawa
  • Patent number: 6681163
    Abstract: The system of the present invention is configured to detect moisture on a surface and includes a sensor that may be divided into a plurality of subwindows. At least one of the subwindows has a sensitivity that is independently variable. The system may further include an optical system operative to direct light rays from at least a portion of the surface onto the sensor, and a processing system in communication with the sensor and operative to independently adjust the sensitivity of the at least one subwindow and to analyze data from the sensor to detect moisture. The processing system may control the windshield wipers based upon a number of subwindows in which moisture is detected.
    Type: Grant
    Filed: October 4, 2001
    Date of Patent: January 20, 2004
    Assignee: Gentex Corporation
    Inventors: Joseph S. Stam, Harold C. Ockerse, Charles David Kibler, IV
  • Publication number: 20040008000
    Abstract: The present invention is directed to a wiper system (10) using two wipers (12, 14) and two wiper motors (26, 28), which drive the wipers (12, 14) and of which at least one first wiper motor (26) forms a sub-assembly with an electronic control unit (34). It is proposed to design the second wiper motor (28) as rotary motor having only one sensory system (36) for detecting the absolute and relative rotational position of its driven shaft (32), which generates corresponding signals for the control unit (34) of the first wiper motor (26), and the first wiper motor (26), in the rotational speed and the rotational position of its driven shaft (32), is regulated by the control unit (34) as a function of the rotational position and the rotational speed of the driven shaft (32) of the second wiper motor (28).
    Type: Application
    Filed: June 23, 2003
    Publication date: January 15, 2004
    Inventors: Wilfried Merkel, Gebhard Michenfelder, Claus Fleischer
  • Patent number: 6674476
    Abstract: A housing for a TV camera has an automatic wiping mode for automatically driving a wiper, which is provided at a front window of the housing, at predetermined time intervals. The execution of the automatic wiping mode while the TV camera is unused prevents a large amount of snow and frost, etc. from adhering to the front window. The wiper and two nozzles of a window-washing device for jetting a washing liquid are provided on the front window of the housing in a pan/tilt head. If the pan/tilt head is set to the automatic wiping mode, the wiper and the window-washing device automatically operate at predetermined time intervals. This prevents the snow and the frost from adhering to the front window while the pan/tilt head is not operated, e.g., at night. Thus, the shooting can be begun quickly when the need arises.
    Type: Grant
    Filed: June 22, 1999
    Date of Patent: January 6, 2004
    Assignee: Fuji Photo Optical Co., Ltd.
    Inventor: Akihiro Suzuki
  • Patent number: 6657410
    Abstract: A control device for the drive motor of a windscreen wiper device in a vehicle, especially a motor vehicle, comprising a control switch which can be activated by means of a manually actuated wiper switch and which automatically controls the drive motor in a switching stage of said wiper switch according to a rain sensor signal corresponding to a characteristic curve. The operating data for the drive motor varies according to the external effects of lighting, temperature, or speed parameters.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: December 2, 2003
    Assignee: DaimlerChrysler AG
    Inventors: Josef Berger, Alf Blessing, Roland Mauser, Rainer Mackel
  • Patent number: 6624604
    Abstract: A wiper control device in which an abnormal condition of a FET is detected by distinguishing an action of an overheat-cutting protective function normally difficult to be detected with measuring the drain voltage of the FET and by which the control of the pertinent FET is restrained upon the detection of abnormality so as to prevent a short circuit in the wiper control device from occurring. When an FETB (Qb) is set on, whether or not a drain voltage Vd is lower than Vpe ({fraction (l/2)}VG) is judged (step S5), and if lower, it is judged that the drain and ground is short-circuited, that is, an overheat-cutting protective function is acted, and “1” is added to the number of times of short circuit detection Perror (step S7). It is judged whether or not the added value of the number of times of short circuit detection Perror reaches a reference value (step S11).
    Type: Grant
    Filed: November 14, 2001
    Date of Patent: September 23, 2003
    Assignee: Yazaki Corporation
    Inventors: Akihiko Torikoshi, Akira Serizawa, Yuichi Nakazawa
  • Patent number: 6617819
    Abstract: The present invention relates to a motor and especially to a technique for maintaining constant power consumption in preheating a compressor motor in an air conditioner. An object thereof is to permit constant preheating of the motor irrespective of variations in receiving voltage. To accomplish this object, switching control of an inverter (15) that applies a three-phase current to a motor (30) is performed by a control circuit (20) in accordance with a duty based on detected values of voltage (Vm) and current (Im). This duty decreases with increasing receiving voltage.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: September 9, 2003
    Assignee: Daikin Industries, Ltd.
    Inventors: Hiroshi Dohmae, Tomoisa Taniguchi
  • Patent number: 6617813
    Abstract: A raindrop sensor detects an amount of raindrops landed on a window glass and outputs a measurement signal to a microcomputer. The microcomputer calculates an average amount of raindrops by averaging a predetermined number of the latest measurements. The microcomputer calculates an interval time for the wiper based on the calculated average amount of raindrops. At this time, when the calculated average amount of raindrops deviates from a predetermined reference value, the microcomputer calculates the average amount of raindrops using a smaller number of the latest measurements.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: September 9, 2003
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Taiji Morishita, Masao Tokunaga
  • Patent number: 6614043
    Abstract: A method and assembly for sensing moisture on the exterior surface of a sheet of glass (14) comprising the steps of emitting light rays from an illuminator (12) on an illuminator axis (I) intersecting the glass (14) at an illuminator angle of incidence I&thgr; to reflect the light rays on a reflection axis (R) at an angle (R&thgr;) of reflection to the glass (14) and capturing on an imaging axis (C) the reflected light rays including reflections of moisture (19) on the exterior surface of the glass (14). The method is characterized by isolating the reflection of moisture (19) from the direct reflection of the illuminator (12) to prevent the capture of the direct reflection of the illuminator (12). This can be accomplished by offsetting the imaging axis (C) from the reflection axis (R), or by stopping the direct reflection of the illuminator (12) from being captured, as with a beam stop (24).
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: September 2, 2003
    Assignee: Valeo Electrical Systems, Inc.
    Inventor: Peter A. Hochstein
  • Patent number: 6555804
    Abstract: The invention relates to a method and device for detecting objects (3) on a windshield (2). The method comprises the following steps: Placing an optical sensor array (4) on the inner side of a section of the windshield (2), said array having a plurality of individual pixels and being focused on the outer side (7) of the windshield (2); determining the local frequency spectrum S(f) of the intensity fluctuations of pixels of the sensor array (4), said pixels being combined in one or more blocks, and afterwards; evaluating the local frequency spectrum, whereby the detected local frequency spectrum S(f) is compared to one or more reference frequency distributions, and whereby a control signal for triggering one or more actuators is generated when the determined local frequency spectrum S(f) sufficiently conforms to a reference frequency distribution. The device comprises a detecting unit (4) connected to a data processing unit (5).
    Type: Grant
    Filed: July 18, 2000
    Date of Patent: April 29, 2003
    Assignee: Leopold Kostal GmbH & Co. KG
    Inventor: Frank Blasing
  • Patent number: 6425160
    Abstract: An intermittent driving apparatus for a rotary window cleaner comprises a first wiper (2) which is connected to a rotating shaft (10) of a first motor (8) and is rotatably disposed on a front window (1), a second wiper (3) which is connected to a rotating shaft (11) of a second motor (9) and is rotatably disposed on a front window (1) adjacently to the first wiper (2), and an electronic control circuit having brush boards (18, 20) of two motors connected to each other so that the second motor (9) is rotated at a predetermined time after the first motor (8) is rotated. The electronic control circuit includes a signal generating circuit (30) for repeatedly sending signals to the brush board (18) of the first motor (8) at fixed time intervals, and a brake mechanism for stopping the two wipers at the start position for a predetermined time every one rotation.
    Type: Grant
    Filed: October 13, 1999
    Date of Patent: July 30, 2002
    Assignee: Saito Motors Co., Ltd.
    Inventor: Shosaku Saito
  • Patent number: 6420845
    Abstract: A control device for the driving motor (10) of a windshield system. A manually operated wiper switch (18) is provided for selecting an operating mode, in at least one of which the wiper speed is automatically controlled by a characteristic curve and the signal from a rain sensor (13). To modify the characteristic curve based on the use of the system by an individual driver, the manually operated wiper switch (18) conveys control commands to an adaptation algorithm control in a control circuit (16). The control circuit (16), in response to switching out of the automatic mode, generates a new characteristic curve at a modified operating point, with the new characteristic curve incorporating the modified operating point. When the switching stage which is dependent on the quantity of rain is again activated, the diving motor (11) is controlled according to the new characteristic curve.
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: July 16, 2002
    Assignee: DaimlerChrysler AG
    Inventors: Rainer Mäckel, Roland Mauser
  • Patent number: 6400110
    Abstract: A wiper control apparatus includes a combination switch 2, a wiper motor 2, an autostop (AS) switch 8, a first semiconductor switch element 4 for on/off controlling energization of the wiper motor, and a controller for supplying an ON/OFF control signal to the first semiconductor switch element. While the wiper operates in the operation mode set by the combination switch, if the level of the signal produced from said AS switch does not vary for a longer period than a prescribed abnormality detecting period owing to occurrence of abnormality of said wiper motor, said controller forcibly turns off said first semiconductor switch element. In this configuration, a wiper control apparatus can be provided which is compact, reliable and surely operable using a semiconductor switch and a controller digital controlled.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: June 4, 2002
    Assignee: Yazaki Corporation
    Inventors: Hiroo Yabe, Kazuhiro Kubota
  • Patent number: 6400111
    Abstract: A system and method for using a relatively high voltage power source on a locomotive to power a windshield wiper system that is capable of operating at variable and interval delay speeds comprising a first DC electric motor, a second DC electric motor, a controller operatively connected for enabling operation thereof, and a convertor power supply connected to the relatively high voltage power source where the convertor has a dynamic response characteristic emulating the electric power characteristics of a conventional vehicle battery whereby the convertor can be rated for supplying nominal motor current but can supply relatively high currents to the first DC motor to allow the motor to overcome stalled conditions
    Type: Grant
    Filed: January 31, 2000
    Date of Patent: June 4, 2002
    Assignee: General Electric Company
    Inventor: Gail Leroy Detar