Patents Assigned to Lucas Industries public limited company
  • Patent number: 6679568
    Abstract: The invention relates to a block-protected braking system for a vehicle, comprising an electronic controller (22, 24) arranged in a housing (12), a valve block (14) to accommodate solenoid valves for controlling the hydraulic fluid in the braking system, and a pump motor (16) for a pump which delivers hydraulic fluid, with the solenoids (20) of the valves being accommodated in an intermediate body (18) which is arranged between the valve block (14) and the housing (12) of the electronic controller, said intermediate body (18) comprising electric connecting means (34, 38) for connecting the electronic controller with the solenoids (20), and said valve block (14) and said housing (12) of the electronic controller being connected with each other by means of the intermediate body (18).
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: January 20, 2004
    Assignee: Lucas Industries public limited company
    Inventors: Daniel Schäfer, Leo Gilles
  • Patent number: 6588855
    Abstract: An electro-hydraulic braking system of the type which operates normally in a brake-by-wire (EHB) mode wherein hydraulic pressure is applied to braking devices at the vehicle wheels in proportion to the driver's braking demand as sensed electronically at a brake pedal, but which, if the brake-by-wire mode should fail, operates in a push-through mode wherein hydraulic pressure is applied to the braking devices at the vehicle wheels by way of a master cylinder coupled mechanically to the brake pedal. In order to minimize jolting within the system when changeover from push-through to brake-by-wire braking takes place, the existence of a push-through condition is recognized during an initialization stage of the EHB mode and the initial EHB demand is set at the prevailing push-through braking or deceleration level and then adapted smoothly to the desired EHB demand.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: July 8, 2003
    Assignee: Lucas Industries Public Limited Company
    Inventor: Alan Leslie Harris
  • Patent number: 6508521
    Abstract: An anti-locking brake system for traction control and vehicle dynamics control such that a pump for actuating a wheel brake removes brake fluid from a brake pressure generating unit and supplies it to the wheel brake. Disposed between the brake pressure generating unit and an input connection of the pump is a valve arrangement in the form of a 2-connection/3-position valve, which in a non-actuated (normal) position blocks the connection between the brake pressure generating unit and the input connection of the pump. In a first actuating position the valve arrangement establishes a secondary flow connection between the brake pressure generating unit and the input connection of the pump, and in a second actuating position establishes a primary flow connection between the brake pressure generating unit and the input connection of the pump. The primary flow connection has a larger flow cross section than the secondary flow connection.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: January 21, 2003
    Assignees: Lucas Industries public limited company, Varity GmbH
    Inventors: Helmut Gegalski, Thomas Wald
  • Patent number: 6494125
    Abstract: A pneumatic brake booster (10) comprises a control valve (22) for controlling a pneumatic pressure difference, a force input element (24) for actuating the control valve (22), a force output element (38) for transmitting the braking force, a reaction disk (34) made of elastomeric material disposed between the force output element (38) and the force input element (24), and a device, which is disposed between the reaction disk (34) and the force input element (24) and acts upon the reaction disk (34), for varying the force transmission ratio between force input element (24) and force output element (38) in dependence upon the force exerted on the force input element (24). For a less expensive design and greater ease of assembly, the device for varying the force transmission ratio is designed as a preassembly unit in the form of a cartridge (30), which after preassembly is insertable into the control valve (22).
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: December 17, 2002
    Assignee: Lucas Industries public limited company
    Inventors: Thomas Hannus, Gerd Puscher
  • Patent number: 6439351
    Abstract: A brake (10) for a hydraulic vehicle brake system has a housing (14) with a bore (18) which is formed therein and in which a brake piston (20) is received in a sealingly and slideably displaceable manner. The brake piston (20) is adapted to press a brake lining (32) against a brake disk (12) by way of hydraulic pressure. For sealing, the brake piston (20) is sealed off relative to the bore (18) by a sealing ring (26) made of elastic material. In order to optimize the adhesive and sliding properties between the sealing ring (26) and brake piston (20), the sealing ring (26) and/or at least that outer surface of the brake piston (20) which cooperates with the sealing ring (26) is coated with a lacquer which contains an organic binder and a solid lubricant.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: August 27, 2002
    Assignee: Lucas Industries public limited company
    Inventors: Franco Sanitate, Willibrord Conrad
  • Patent number: 6431330
    Abstract: The invention relates to a brake arrangement for a land vehicle comprising the following characteristics: an electric motor with a downstream connected (reduction) gear which acts on the friction pads of a brake arrangement, with the gear being designed self-locking, and an actuation mechanism by means of which the self-locking function can be cancelled or established.
    Type: Grant
    Filed: April 19, 2000
    Date of Patent: August 13, 2002
    Assignee: Lucas Industries public limited company
    Inventors: Gregor Poertzgen, Karl-Friedrich Wörsdorfer, Ralf Erben, Guido Zenzen
  • Patent number: 6422122
    Abstract: The invention utilizes the finding that a pressure variation or pressure difference between two chambers of a brake booster is a parameter of considerable influence on the behavior of a brake booster control valve arrangement in the operation of the brake booster. Starting from a holding position for the control valve arrangement, pressure levels related to changeovers from the holding position to a first pressure changing position and a second pressure changing position, respectively, are determined. Depending on the thus determined pressure level differences, current values for an actuation of the control valve arrangement defining upper and lower limits for the holding position are adjusted.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: July 23, 2002
    Assignee: Lucas Industries Public Limited Company
    Inventors: Christoph Linden, Lothar Zeuner
  • Patent number: 6412608
    Abstract: The invention relates to an actuator assembly for a vehicle brake with a drive which is connected with an input side of a transmission. An output side of the transmission is adapted for the actuation of at least one friction element of the vehicle brake, with the transmission being a knee lever arrangement with two arms.
    Type: Grant
    Filed: January 6, 1999
    Date of Patent: July 2, 2002
    Assignee: Lucas Industries public limited company
    Inventors: Kurt Mohr, Frank Martin Müller
  • Patent number: 6386336
    Abstract: The invention relates to an actuator subassembly for a vehicle brake with a drive, which is connected to an input side of a lever arrangement, wherein an output side of the lever arrangement is adapted to operate at least one friction element of the vehicle brake. If a vehicle brake of this kind is used as a parking brake, static preloading forces occur at the friction element. In order that these forces may still be taken up within the actuator subassembly, it is proposed that the lever arrangement be changed over from a service brake region, in which it is self-releasing, beyond its force reversal point into a parking brake position, in which it is self-locking. Various operating possibilities for an actuator subassembly of this kind and the use thereof in a vehicle brake are described.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: May 14, 2002
    Assignee: Lucas Industries public limited company
    Inventors: Kurt Mohr, Siegfried Franz
  • Patent number: 6389575
    Abstract: A data integrity checking apparatus including an array of n latch circuits, each latch circuit having an input terminal and an output terminal, an array of n exclusive OR (XOR) gates, each XOR gate having two inputs and an output, the output terminals of the XOR gates are connected to the input terminals of respective ones of the latch circuits, the XOR gates receiving as one input bit-rotated words from the outputs of the latch circuits and as another input successive words of the data to be checked.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: May 14, 2002
    Assignee: Lucas Industries public limited company
    Inventor: Robin Hill
  • Patent number: 6363719
    Abstract: A hydraulic control unit for a motor-vehicle braking system includes a pump (32) delivering hydraulic fluid under pressure, the pump being capable of being controlled by an electronic control unit (ECU) and supplying the hydraulic fluid for at least one braking device (22) which is coupled to a wheel of the vehicle, and also a first reservoir (34) for pressureless hydraulic fluid, which is assigned to the pump (32) on the input side, and a second reservoir (36) for hydraulic fluid under pressure, which is assigned to the pump (32) on the output side. In order to design the control unit for good packaging and installation space considerations, the pump (32), the first reservoir (34), and the second reservoir (36) are arranged in a common casing (60), and integrated as an electrohydraulic modular unit.
    Type: Grant
    Filed: December 27, 2000
    Date of Patent: April 2, 2002
    Assignee: Lucas Industries Public Limited Company
    Inventors: Kurt Mohr, Salvatore Oliveri, Thomas Wagner
  • Patent number: 6361122
    Abstract: In a pedal assembly for a brake-by-wire vehicle braking system, feedback reaction means (10) is provided so that feedback to the driver through the pedal (3) provides comfortable feel, similar to the pedal feel achieved in a conventional hydraulic braking system fitted to a non-EBS equipped vehicle. The feedback reaction means may comprise a two-rate spring assembly (24, 26) or a variable rate spring assembly, in combination with a damper (40).
    Type: Grant
    Filed: April 23, 1997
    Date of Patent: March 26, 2002
    Assignee: Lucas Industries public limited company
    Inventors: Robert Alan Anderson, Stephen Donald Crisp, Barry John Bridgens, Michael James Ayres
  • Patent number: 6360592
    Abstract: A method of detection and identification of pressure sensor faults in an electro-hydraulic braking system of the type comprising a brake pedal, respective braking devices connected to the vehicle wheels and which communicate with electronically controlled proportional control valves in order to apply hydraulic fluid under pressure to the braking devices, respective pressure sensors for measuring the hydraulic pressures at the individual braking devices, a hydraulic pump driven by an electric motor, a high pressure hydraulic pressure accumulator fed by the pump for the provision of hydraulic fluid under pressure which can be passed to the braking devices via the proportional control valves in order to apply hydraulic fluid under pressure to the braking devices in proportion to the driver's braking demand as sensed at the brake pedal, and a supply pressure sensor for monitoring the hydraulic pressure supplied to the electronically controlled proportional control valves.
    Type: Grant
    Filed: November 24, 1999
    Date of Patent: March 26, 2002
    Assignee: Lucas Industries public limited company
    Inventors: Alan Leslie Harris, Mark Leighton Howell, Mark Ian Phillips
  • Patent number: 6357837
    Abstract: The invention relates to an electronically controllable brake booster with a vacuum chamber and a pressure chamber, which are separated from each other by a movable wall, a control valve arrangement which can be actuated by means of an electromagnetic actuation means, and by means of which a pressure difference between the pressure chamber and the vacuum chamber can be adjusted, with the control valve arrangement, as a function of a current flowing through the electromagnetic actuation means, assuming a holding position in which the current ranges between a higher value and a lower value without the control valve arrangement leaving the holding position, a first pressure changing position in which the current is higher than the higher value, and a second pressure changing position in which the current is lower than the low value, characterized in that upon a changeover of the control valve arrangement from the holding position into the first or the second pressure changing position, or upon a changeover from
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: March 19, 2002
    Assignee: Lucas Industries public limited company
    Inventors: Christoph Linden, Gregor Godlewsky, Lorenz Maack
  • Patent number: 6349801
    Abstract: The invention relates to an electromechanically actuatable disk brake with a housing, a friction pad against which an electrically actuatable actuator acts, with the actuator comprising an electric motor and a spindle/nut transmission arrangement, characterised in that the electric motor is configured as an internal rotor motor with a stator and a rotor, the rotor of which is coupled non-rotably with the spindle, the spindle is operatively coupled with the nut in order to transform a rotational movement of the spindle into a translatory movement of the nut, the spindle is supported along its longitudinal extent in at least two places so as to be rotatable relative to the housing, and the nut is guided axially slidable relative to the housing.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: February 26, 2002
    Assignee: Lucas Industries public limited company
    Inventors: Boris Köth, Kurt Mohr, Salvatore Oliveri
  • Patent number: 6345700
    Abstract: A brake lining module (10) with electric warning device (12) for indicating excessive friction lining wear comprises a back plate (14), to which a friction lining (16) is fastened, wherein the back plate (14) has a radially situated, friction-lining-free region (18). Disposed close to the back plate (14) in the friction lining (16) is a bore (24), in which a plug (28) is provided, which comprises a head (34) and a shank (32) with a longitudinal groove (38), in which an electric conductor (30) passed through the head (34) is accommodated. Projecting up from the head (34) of the plug (28) is a protective shield (36), which is laterally offset relative to the longitudinal groove (38) and has an extension (46), which at a distance above the head (34) protrudes in the direction of the common center plane (40) of the shank (32) and of the longitudinal groove (38).
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: February 12, 2002
    Assignee: Lucas Industries public limited company
    Inventor: Guido Zenzen
  • Patent number: 6328388
    Abstract: The present invention relates to a brake actuation unit comprising a cylinder/piston arrangement which acts on at least one brake lining which can be brought into frictional engagement with a brake disk, a hydraulic pump which is hydraulically connectable with a pressure chamber of the cylinder/piston arrangement in order to move the cylinder of the cylinder/piston arrangement relative to the piston of the cylinder/piston arrangement, and a motor for driving the hydraulic pump.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: December 11, 2001
    Assignee: Lucas Industries public limited company
    Inventors: Kurt Mohr, Thomas Wagner
  • Patent number: 6322162
    Abstract: An actuating device for an electrohydraulic vehicle brake system has an emergency brake cylinder (2) which comprises a piston (24, 25), the latter being displaceable in a housing (21), and which can be actuated by means of a brake pedal (1), and a simulation device (4) for simulating a force/displacement action of the brake pedal (1), wherein the simulation device (4) is connected in series and disposed after the emergency brake cylinder (2) in the direction of force from the brake pedal (1) to the emergency brake cylinder (2). In order to hydraulically uncouple the simulation device (4) from the emergency brake cylinder (2), the emergency brake cylinder (2) is supported at the simulation device (4) and the piston (24, 25) can be locked relative to the housing (21) such that the simulation device (4) can be mechanically actuated by the emergency brake cylinder (2).
    Type: Grant
    Filed: January 8, 2001
    Date of Patent: November 27, 2001
    Assignee: Lucas Industries public limited company
    Inventor: Kurt Mohr
  • Patent number: 6290307
    Abstract: A braking system (10) with a master cylinder (12) which comprises at least one cylinder/piston arrangement (14, 16) which can be actuated by a brake pedal (18) for supplying hydraulic fluid to at least one brake circuit (22, 24) is characterized by a controllable pressure source (54, 78, 90, 92) which, under the control of an electronic control unit ECU subjects the piston (16) of the cylinder/piston arrangement (14, 16) in the sense of supplying hydraulic fluid to the brake circuit (22, 24).
    Type: Grant
    Filed: May 13, 1998
    Date of Patent: September 18, 2001
    Assignee: Lucas Industries Public Limited Company
    Inventors: Gregor Poertzgen, Kurt Mohr
  • Patent number: 6253656
    Abstract: A sensor assembly for a vacuum brake booster (10) comprises a housing (48) arranged outside the brake booster housing (12), in which a differential pressure sensor (56) is located. For connecting the differential pressure sensor (56) with a working chamber (16′) of the brake booster (10), the housing (48) has a first air duct (50) which extends from the sensor assembly (46) to the working chamber (16′) of the brake booster (10). In addition, the sensor assembly (46) has a second air duct (52) which extends into a vacuum chamber (18′) of the brake booster (10) in order to connect the differential pressure sensor (56) with said vacuum chamber (18′). A plug-type or socket-type connector (64) for a further sensor is provided in particular on the side of the sensor assembly (46) which is opposite the air ducts (50, 52).
    Type: Grant
    Filed: January 5, 2000
    Date of Patent: July 3, 2001
    Assignee: Lucas Industries Public Limited Company
    Inventor: Leo Gilles