Patents Assigned to WABCO Westinghouse Fahrzeugbremsen GmbH
  • Patent number: 5531288
    Abstract: The present invention teaches an activation apparatus for a differential pawl. Such activation apparatus is designed to prevent damage to components of the differential pawl and/or of the drive train resulting from operator error. When a drive wheel slips, a monitoring means acquires a slip signal; and when a wheel slip signal is present, an interrupt means, which can be provided as a switching apparatus, prevents the preassurization of a pressure-medium-operated actuator of the activation mechanism.
    Type: Grant
    Filed: July 28, 1992
    Date of Patent: July 2, 1996
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventors: Horst Deike, Erwin Petersen
  • Patent number: 5496096
    Abstract: This invention provides a method of and an apparatus for regulating an electrically regulated brake circuit of a multi-circuit brake mechanism. To eliminate the cost of brake pressure modulators, this invention measures the brake value of a pressure signal regulated brake circuit and transforms it into an electric brake value signal to regulate or co-regulate the electrically regulated brake circuit in a normal mode of operation by this brake value signal.
    Type: Grant
    Filed: December 7, 1989
    Date of Patent: March 5, 1996
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventors: Erwin Petersen, Manfred Schult
  • Patent number: 5469358
    Abstract: A method is provided for the generation of wheel acceleration control signals and wheel deceleration control signals for an anti-lock system for wheels of a vehicle. The vehicle is furnished with a digital electronic anti-lock system with at least one microprocessor. The microprocessor calculates a wheel comparison speed (v.sub.diff). The wheel comparison speed is obtained by a filtering of the actual wheel speed (v.sub.wheel), and follows in time to the actual wheel speed (v.sub.wheel). A deceleration signal (-b) or an acceleration signal (+b), respectively, is then furnished when the absolute value of the difference (.DELTA.) between the wheel comparison speed (v.sub.diff) and the actual wheel speed (v.sub.wheel) surpasses a preset value as based on the sign of the difference (.DELTA.).
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: November 21, 1995
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventor: Gerhard Ruhnau
  • Patent number: 5400649
    Abstract: An apparatus is furnished for sensing the tire pressure and for generating a signal by way of an actuator. If the tire pressure drops below the predetermined reference tire pressure, then this is signalled immediately and instantly within a relatively small pressure tolerance threshold. The pressure sensitive device 1 includes a valve device 7. The valve device 7 connects the tire pressure, applied to the actuator 4 and acting against the force of the compression spring 6, to the atmosphere if the tire pressure drops below a predetermined reference tire pressure. The apparatus is suitable for generating a permanent signal, even in case no further pressure remains in a tire.
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: March 28, 1995
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventors: Peter Bartscher, Stefan Herzog, Helmut Ulrich, Gerhard Stegemann, deceased
  • Patent number: 5368499
    Abstract: A multi-lead electrical plug connector is disclosed including a plug part (4) and a socket part (5). The plug connector is furnished in particular for the connection of two cables, each cable having two conducting wires. The plug connector is subdivided into two end section (A, C) with round cross-section and a center section (B) with an oval or flat cross-section, respectively. Two contact pins (1, 2) and two contact shells (14, 15) are furnished, which are disposed adjacent to each other on the longitudinal axis (3) of the oval section. The plug connector is furnished in particular for the heavy-duty operating conditions present, for example, in motor vehicles.
    Type: Grant
    Filed: March 28, 1991
    Date of Patent: November 29, 1994
    Assignee: Wabco Westinghouse Fahrzeugbremsen GmbH
    Inventor: Ingo Hirt
  • Patent number: 5341117
    Abstract: In a device for positional fixation of a coil support in a cup-shaped formed casing part, wherein a closure part (4, 8) is attached to the cup-shaped casing part (1, 2, 22). Said closure part (4, 8) is disposed on the side of the coil support (10, 19, 21) , located remotely relative to the floor (22) of the cup-shaped casing part (1, 2, 22), in or, respectively, at the cup-shaped casing part (1, 2, 22). Tongue-shaped adjuncts (9, 33) are furnished at the closure part (4, 8). Said tongue-shaped adjuncts (9, 33) extend in a direction toward the coil support (10, 19, 21) and exhibit nose-shaped protrusions (13, 29) directed toward the wall of the coil support (10, 19, 21) . Projections (11, 31) or, respectively, recesses (12, 30), are formed like a lock toothing, and are furnished at the coil and are disposed toward the tongue-shaped adjuncts (9, 33).
    Type: Grant
    Filed: January 25, 1990
    Date of Patent: August 23, 1994
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventor: Gunther Singbartl
  • Patent number: 5294190
    Abstract: A brake system with at least one brake circuit comprises a mechanical brake-pressure control device and an electrical brake-pressure control device. The brake system is constructed without additional expenditure and by use of a mechanical brake-pressure control device and by an electrical control valve device. The system is constructed such that the brake-pressure modulator (8) of the electrical brake-pressure control device (6, 8, 11, 19) can also be controlled by pressure. The brake-pressure modulator (8) meters the brake pressure, both on the strength of the supplied electrical signal as well as according to the value level of the fed-in redundant brake pressure. The control electronics (11, 19) of the electrical brake-pressure control device (6, 8, 11, 19) is constructed such that it sets the strength of the electrical signal to a value required for covering and for meeting the respective brake-pressure demand request.
    Type: Grant
    Filed: March 5, 1991
    Date of Patent: March 15, 1994
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventors: Joachim Feldmann, Erwin Peterson, Manfred Schult
  • Patent number: 5273139
    Abstract: A brake cylinder is disclosed featuring a reduction of weight and a construction for reducing a tendency to vibrate. The piston (11), serving for the brake actuation, is formed out of a plastic mold part and is furnished with a simplified guiding of the piston. A pressure piece (44) serves for the transfer of the braking force, and is formed at the brake cylinder as a plastic mold part for allowing a relatively large distance from the brake drum. The new brake cylinder can be used advantageously for vehicles with wedge expanding brakes, where the brake force is transmitted by and applied with a pressure agent.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: December 28, 1993
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventors: Bruno Kotarra, Horst Mylius, Wolfgang Pohl, Momcilo Ristic
  • Patent number: 5263556
    Abstract: A brake actuating device is furnished with a device for slack readjustment of a brake, in particular of a vehicle brake. Defects in the area of the readjustment device can result in an erroneous and defective brake behavior. The invention device furnishes a continuous control of the brake release gap and the brake lining wear. The motion of the slack readjustment device (5, 7) is used for generating a measurement distance (n) which is scanned by a signal generator (27, 31) for feeding a signal to an evaluation device and for indicating the readjustment situation. The evaluation device serves for a continuous surveillance and monitoring of the brake release gap and of the brake lining wear in a vehicle or in a diagnostic center, where the evaluation device can be connected to the vehicle.
    Type: Grant
    Filed: June 5, 1991
    Date of Patent: November 23, 1993
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventor: Josef Frania
  • Patent number: 5255962
    Abstract: An electronic brake system for road vehicles includes a decentrally formed electronic device and at least one central module. The central module includes at least one microprocessor with its individual intelligence. A module (1, 2, 3, 4) is coordinated in each case to a respective wheel. The modules (1, 2, 3, 4) also include microprocessors with an individual intelligence function. The wheel modules are hierarchically subordinated to the central module (5, 6). The central module (5, 6) is integrated system-wide into the remaining vehicle electronics. This means that the central module (5, 6) receives signals such as steering angle, vehicle deceleration, values delivered imposed by the driver such as brake requirement, parking brake, retarder, etc. which are of importance for the entire vehicle. The wheel modules (1, 2, 3, 4) are responsible primarily for the supply and the operational control of the in each case respective wheel.
    Type: Grant
    Filed: July 17, 1991
    Date of Patent: October 26, 1993
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventors: Detlev Neuhaus, Wolfgang Stehr
  • Patent number: 5253931
    Abstract: An automatic control logic for an anti-lock protected vehicle braking plants is provided for all-terrain operation. In this case, the standard automatic control logic for road operation is switched, by the driver with an all-terrain switch (13) to a special automatic control logic for all-terrain operation. The special automatic control logic generates time periods, during which a short-term blocking of the automatically controlled wheels (12) is intentionally permitted. The locking time periods have a time duration of about 240 ms. The braking distance of the vehicle in cross-country terrain is shortened while a sufficient cornering force remains based on the all-terrain automatic control logic.
    Type: Grant
    Filed: August 21, 1991
    Date of Patent: October 19, 1993
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventors: Harald Koster, Helmut Pannbacker, Henrich Riedemann
  • Patent number: 5251966
    Abstract: A method for the braking of a vehicle train with pressure-actuated brakes and arrangements for performing this method are disclosed. The prior art shows that, because of a different rapid build-up of a braking pressure in the various rigid vehicles of a vehicle train, there occurs an overrun shock during adjustment transition shifting braking phases. According to one embodiment of the invention, there is furnished a lead and predominance by a predetermined value in the co-braking signal furnished from the one rigid vehicle to the second rigid vehicle of a vehicle train. According to a further embodiment, a predominance by a predetermined amount in the braking pressure in the second vehicle versus the co-braking signal is furnished, if during the preceding brake application actuation the overrun shock has surpassed a preset tolerance width. The invention can be applied in particular for vehicle trains made up of a motor vehicle and one or several trailers or semitrailers.
    Type: Grant
    Filed: November 5, 1990
    Date of Patent: October 12, 1993
    Assignee: Wabco Westinghouse Fahrzeugbremsen GmbH
    Inventors: Otto Friederichs, Johann Rothen, Hartmut Rosendahl
  • Patent number: 5230243
    Abstract: The tire surveillance device of the invention includes a pressure measurement member, where the signal of the pressure measurement member is corrective dependent on the temperature and evaluation unit actuated by the resulting signal. The correction member (21, 34) is disposed such that it is exposed to the temperature prevailing outside of the tire (1). The disposition of the correction member avoids considering erroneous temperatures resulting for example from a heat stream generated by the braking device in the rim of the wheel.
    Type: Grant
    Filed: September 12, 1990
    Date of Patent: July 27, 1993
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventor: Reinecke Erich
  • Patent number: 5222579
    Abstract: An apparatus is furnished for the automatic adjustment of a brake in particular of a vehicle brake. The invention device provides generous assembly tolerances while employing relatively simple device components. The drive of the slack adjustment device (2, 4), formed from the gear rack drive (8, 9, 12), is surrounded in longitudinal direction of the gear rack by free spaces (30, 31), which furnish an appropriate clearance space to the gear rack (9). A pinion engages a second set of gear teeth of the gear rack. The pinion and a lost motion device drive the slack adjustment device. The drive device formed by the gear wheel, by the gear rack and by the pinion is disposed between the brake lever and a slack adjustment device. The device is suitable, in particular, to be employed in a brake lever with an automatic slack adjustment device.
    Type: Grant
    Filed: May 30, 1991
    Date of Patent: June 29, 1993
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventor: Josef Frania
  • Patent number: 5207299
    Abstract: A brake actuating device is furnished with a device for slack readjustment of a brake, in particular of a vehicle brake. Defects in the area of the slack readjustment device can result in an erroneous and defective brake behavior. The invention device furnishes a continuous control of the brake release gap and of the brake lining wear. The motion of the brake mechanism is used for the generation of a first measurement distance (s). The motion of the slack readjustment device (5, 7) is used for the generation of a second measurement distance (n). A regulating distance (q), formed by a superpositioning of the measurement distances (s) and (n), can be scanned and recorded with a distance sensor (17) of a signal generator (18). The signal, corresponding to the regulating distance (q), can be transformed into signals corresponding to the measurement distances (s) and (n) in an evaluation device.
    Type: Grant
    Filed: June 5, 1991
    Date of Patent: May 4, 1993
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventor: Joachim Feldmann
  • Patent number: 5205619
    Abstract: An electronic circuit, in particular for an anti-skid protection system for vehicles is provided with at least with one microcomputer (2). The microcomputer (2) controls a load (4) via a final amplifier (3). A resistor circuit (6, 7, 8) is furnished for surveillance of the final amplifier (3) as well as of the load (4). The resistor circuit (6, 7, 8) is disposed parallel to the final transistor (5). The microcomputer (2) or a separate control circuit scans the voltage at the junction nodal point (9) between the final transistor (5) and the load (4) at predetermined points in time and checks it for appropriate level. The resistor circuit (6, 7, 8) is connectable via an electronic switch (10, 11), controlled by the microcomputer (2) or by the separate control circuit, as desired with the operating voltage U.sub.B or with ground. The circuit allows a distinction of errors of the final transistor (5) and of the load (4).
    Type: Grant
    Filed: August 28, 1990
    Date of Patent: April 27, 1993
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventors: Hans Holst, Klaus Pape, Gerhard Ruhnau
  • Patent number: 5187977
    Abstract: An apparatus for the recognition of a rising slope is provided in particular for commercial vehicles, such as trucks or busses. The device comprises at least one sensor (1) for the axle load of the rear axle and/or of the front axle, as well as a device (4) for measuring the vehicle acceleration relative to the road. The signals of the sensor (1) and of the device (4) are fed into an electronics (2). The electronics (2) recognizes from these fed-in data, whether the vehicle is disposed on an uphill grade or on a downhill grade or on level ground. The thus generated signal can be further employed in various electronic systems, for example, in an automatic drawbar force control system.
    Type: Grant
    Filed: March 28, 1991
    Date of Patent: February 23, 1993
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventors: Ralf Koschorek, Gerd Kruger, Hartmut Rosendahl, Johann Rothen
  • Patent number: 5181418
    Abstract: The invention device monitors the pressure of a measurement chamber subjected to the pressure prevailing in a vehicle tire. A pressure-sensitive device scans the tire pressure with a pressure measurement member in a measurement chamber. In case of a tire-pressure drop, the tire pressure is used to actuate an auxiliary actuator (3, 24, 26). The auxiliary actuator genrates the regulating distance (s) dependent on a tire pressure drop below a pressure value required for an actuation of the actuator (13). The regulating distance (s) is recognizable by a sensor. The invention device is suitable for providing a permanent signal even in case of an absence of pressure in the measurement chamber (21).
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: January 26, 1993
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventors: Peter Bartscher, Gunther Singbartl, Erwin Petersen, Helmut Ulrich
  • Patent number: 5180185
    Abstract: The axial load of the mechanically spring-supported drive axle of a lifting axle structure aggregate is defined by the compression of the suspension spring and the pressure of the lifting bellows. A two-dimensional contour of a signal body is employed to engage a signal pin. The signal pin is axially shiftable based on the pressure and rotatable based on the spring support. A two-dimensional contour (20, 21) is disposed at the signal body. The shiftability of the stator (25) of the distance path sensor (24) is provided depending on the pressure of the lifting bellows (1). The pressure-dependent setting of the immersion depth is superposed to the setting of the immersion depth of the signal pin (22) by the contour (20, 21).
    Type: Grant
    Filed: September 12, 1991
    Date of Patent: January 19, 1993
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventor: Horst Eckert
  • Patent number: 5172959
    Abstract: An anti-lock braking system for a two-axle all-wheel drive vehicle having two intra-axle differentials and an engageable central inter-axle differential comprises a wheel sensor associated with each of the wheels for determining the rotational behavior of each of the wheels, and a four-channel electronic control circuit for providing individual wheel regulation. The electronic control circuit also detects whether the central differential is engaged or not and whether a malfunction has occurred in one of the channels. If one of the regulating channels has a malfunction and the central differential is not engaged, the electronic control circuit switches off regulation only in the malfunctioning channel. If, however, the central differential is engaged when a malfunction in one of the regulating channels has occurred, then the electronic control circuit switches off both the malfunctioning channel as well as an intact channel associated with a diagonally opposite wheel.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: December 22, 1992
    Assignee: WABCO Westinghouse Fahrzeugbremsen GmbH
    Inventors: Jurgen Eickhoff, Konrad Rode, Henrich Riedemann