Patents Assigned to Lucas Industries public limited company
  • Patent number: 5979999
    Abstract: An electrohydraulic braking system for motor vehicles with a brake master cylinder which can be actuated by a brake pedal. A wheel brake is coupled with at least with one vehicle wheel. The wheel brake can be connected with the brake master cylinder in order to subject the wheel brake to pressurized hydraulic fluid. A hydraulic pump, and a hydraulic pressure accumulator supplied by the pump, form an alternative source of pressurized hydraulic fluid which can be supplied to the wheel brake through a control valve arrangement in a controlled manner in order to subject the wheel brake to pressurized hydraulic fluid. A shut-off valve is arranged between the hydraulic pump and the hydraulic pressure accumulator in order to selectively make or shut-off a connection between the hydraulic pump and the hydraulic pressure accumulator to permit the hydraulic pump, in certain situations, to rapidly pressurize the braking system without having to simultaneously recharge the hydraulic pressure accumulator.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: November 9, 1999
    Assignee: Lucas Industries public limited company
    Inventors: Gregor Poertzgen, Karl-Friedrich Worsdorfer, Kurt Mohr
  • Patent number: 5975437
    Abstract: A fuel injector solenoid includes an armature through which a high pressure fuel passage extends. Because the fuel passage is disposed within the armature, the solenoid can be made larger, thereby permitting greater armature forces to be developed.
    Type: Grant
    Filed: November 3, 1997
    Date of Patent: November 2, 1999
    Assignees: Caterpillar, Inc., Lucas Industries Public Limited Company
    Inventors: James J. Streicher, Marvin P. Schneider
  • Patent number: 5971500
    Abstract: The invention relates to an electronically controllable braking system for motor vehicles with a brake pressure generator unit (2) which can be actuated by a brake pedal (1), which supplies hydraulic fluid via a hydraulic fluid path (3) to at least one wheel brake (4) of the motor vehicle, a first electromagnetic valve arrangement (5a, 5b) which is arranged in the hydraulic fluid path between the brake pressure generator unit (2) and the wheel brake (4) for controlling the pressure build-up, pressure relief and pressure holding phases in the wheel brake, a motor-powered controllable hydraulic pressure source (7) which, in addition to or in lieu of the brake pressure generator unit (2), supplies hydraulic fluid to the wheel brake (4), and a motor-powered controllable auxiliary energy source (15, 30) which boosts an actuation of the brake pressure generator unit (2) by the brake pedal (1) or which effects an actuation of the brake pressure generator unit (2) in lieu of the brake pedal (1), with the controllable
    Type: Grant
    Filed: May 31, 1998
    Date of Patent: October 26, 1999
    Assignee: Lucas Industries public limited company
    Inventors: Dieter Voges, Frank Lubischer
  • Patent number: 5971300
    Abstract: A fuel injector includes a center tube which conducts fuel flow. A flat-seat poppet valve surrounds a lower portion of the center tube and controls the application of pressurized fuel to first and second check end passages to assist in check closure.
    Type: Grant
    Filed: November 4, 1997
    Date of Patent: October 26, 1999
    Assignees: Caterpillar, Inc., Lucas Industries Public Limited Company
    Inventors: Dana R. Coldren, Marvin P. Schneider, Colin T. Timms
  • Patent number: 5969443
    Abstract: An electromagnetic actuating device comprises a solenoid coil to which a control current can be applied and an armature associated with the solenoid coil which is adapted to carry out movements which are dependent upon a control current flowing through the solenoid coil and a spring arrangement for biassing the armature into opposite directions, with a holding position being defined which is assumed by the armature at a holding current through the solenoid coil, with the holding current flowing through the solenoid coil being variable to a higher value or to a lower value with the armature not leaving the holding position, and both the higher and the lower current value being able to be dimensioned in such a manner that interference influences on the magnetic and spring forces which actuate the armature do not bring the armature from its holding position into an actuated position which is different from the holding position.
    Type: Grant
    Filed: January 20, 1998
    Date of Patent: October 19, 1999
    Assignee: Lucas Industries Public Limited Company
    Inventors: Christopher Linden, Stefan Helbing
  • Patent number: 5940262
    Abstract: A control circuit for an electromagnetically operable fuel control valve of a vehicle engine includes a tank capacitor which upon closure of first and second controllable switches supplies current to the winding of the valve to achieve a high rate of rise of current in the winding and rapid operation of the valve. Following operation of the valve it is maintained in its operated state by current chopping action, the current rise being achieved by drawing current from a low voltage source through a third controllable switch. The current fall is at a high rate and the resultant high voltage induced in the winding is utilized to recharge the tank capacitor.
    Type: Grant
    Filed: September 18, 1997
    Date of Patent: August 17, 1999
    Assignee: Lucas Industries public limited company
    Inventor: Michael Anthony Archer
  • Patent number: 5937649
    Abstract: A brake master cylinder (10) for a hydraulic vehicle brake system has a master cylinder housing (32) and at least one pressure chamber (40) designed therein. Connected to the pressure chamber (40) is a hydraulic fluid reservoir which, furthermore, is provided for connection to a precharge pump of a brake pressure regulating system. Moreover, the brake master cylinder (10) has a hydraulic fluid return connection (30) which makes a fluid connection between the delivery side of the precharge pump, the reservoir and the at least one pressure chamber (40). A throttle (60) is arranged in this liquid connection, said throttle not impeding a hydraulic fluid stream out of the reservoir into the at least one pressure chamber (40) and throttling a hydraulic fluid stream from the return connection (30) into the reservoir. The throttle (60) makes it possible to cause the precharge pump to act on the at least one pressure chamber (40), without an electromagnetic valve being interposed.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: August 17, 1999
    Assignee: Lucas Industries public limited company
    Inventors: Uwe Barz, Markus Mallmann, Bernd Wagner
  • Patent number: 5934854
    Abstract: A ring fastener, with a circular configuration in the rest condition, comprising two ring ends (11, 12) spaced from each other, an essentially constant cross-section over at least 150.degree. of its circumference, and in the area of each ring end (11, 12) a recess (13, 14) opening toward its inner circumference, enables an easy installation. A special apparatus enables a particularly effective installation of the ring fastener in very confined conditions.
    Type: Grant
    Filed: April 2, 1997
    Date of Patent: August 10, 1999
    Assignee: Lucas Industries public limited company
    Inventors: Hubert Krautkremer, Gerd Mayer, Rene Straub
  • Patent number: 5924435
    Abstract: A method of energizing an electromagnetically operable valve which comprises a valve member movable into engagement with a seating when a winding is energized comprising connecting the winding to a DC supply to achieve a rapid rate of rise of current. The current is controlled at the peak value and is then reduced to a low value after an initial movement of the valve member. The valve member continues its movement towards the seating and the current is restored prior to engagement of the valve member with the seating to substantially eliminate bouncing of the valve member away from the seating.
    Type: Grant
    Filed: November 9, 1995
    Date of Patent: July 20, 1999
    Assignee: Lucas Industries public limited company
    Inventors: Robin Christopher Wall, Brian William Tumber
  • Patent number: 5900149
    Abstract: A sedimenter comprises a housing having an inlet and an outlet. The housing defines a collection chamber located beneath and in communication with a sedimentation chamber. Flow path defining means, for example in the form of a baffle, located within the sedimentation chamber forces fuel flowing between the inlet and the outlet to follow a relatively long, tortuous flow path.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: May 4, 1999
    Assignee: Lucas Industries Public Limited Company
    Inventor: Peter Francis Bradford
  • Patent number: 5896958
    Abstract: The drum brake has a brake support plate which is divided into a supporting body (10) and a back plate (22). The supporting body (10) has a central ring (12) for centering and securing to an axle housing of a vehicle, and an abutment carrier (16) against which brake shoes (38) can bear in a circumferential direction. The brake shoes (38) can bear against the back plate (22) in an axial direction. At the supporting body (10) a mounting means (20) for a wheel speed sensor (46) and a rest (56) for a jacket (58) of a brake cable (60) are additionally formed.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: April 27, 1999
    Assignee: Lucas Industries public limited company
    Inventors: Peter Ludke, Frank Biebricher, Albert Langert, Eckhart Op den Camp
  • Patent number: 5890660
    Abstract: A fuel injection nozzle is disclosed which comprises a value needle slidable within a bore and biased by a spring into engagement with a seating of conical form wherein the valve needle includes an upstream conical region of cone angle slightly larger than the seating and a downstream conical region of cone angle slightly smaller than the seating, and an annular groove provided between the upstream and downstream regions wherein an upstream edge of the groove forms with the upstream region a seating line along which the valve needle engages the seating when the valve needle is in its closed position.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: April 6, 1999
    Assignee: Lucas Industries Public Limited Company
    Inventor: John William Stevens
  • Patent number: 5873247
    Abstract: A vehicle brake system with an electronically controllable brake booster, comprising an actuation member (70, 80) transferring the actuation travel of a brake pedal to a master cylinder, which is allocated a travel limiting element (82) accepted between two abutment faces which limits the actuation travel of the actuation member (70), and a switching element (85) which upon an actuation movement of the actuation member (70) can be activated by one of the abutments (91, 91a) in order to issue a signal to the controller of the brake booster, with the travel limiting element being arranged on the actuation member (80) between two collars (83, 84), and a carrier (86) accepting the switching element (85) being arranged between the travel limiting element and one of the collars.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: February 23, 1999
    Assignee: Lucas Industries public limited company
    Inventors: Peter Schluter, Stefan Bubenheim, Christoph Beuerle, Ulrich Danne
  • Patent number: 5865510
    Abstract: A brake pedal (1) for actuation of a brake cylinder (10) of a motor vehicle, comprises a lever (2), having at an end portion of one lever (3) a stepping plate (4) for actuation by a driver, and an articulation location (5) for introducing actuation forces into the brake cylinder (10), characterized in that the lever (2) comprises a first rotational axis (6) and a second rotational axis (7), the lever (2) rotating about the first rotational axis (6) during a normal actuation, and the lever (2) rotating about the second rotational axis (7) during an emergency actuation.
    Type: Grant
    Filed: October 8, 1996
    Date of Patent: February 2, 1999
    Assignee: Lucas Industries public limited company
    Inventors: Gregor Poertzgen, Peter Martin
  • Patent number: 5864195
    Abstract: A stator component is described which comprises first and second limbs defining respective pole faces. Each limb includes an outer surface which is provided with a pair of elongate recesses, each extending in a direction angled to the pole faces. The recesses conveniently intersect one another, and are conveniently formed using a plunge cutting technique.
    Type: Grant
    Filed: September 8, 1997
    Date of Patent: January 26, 1999
    Assignee: Lucas Industries public limited company
    Inventors: David Leslie George, Barrie Gilbert Barker
  • Patent number: 5864775
    Abstract: A rotary position transducer comprises a sensor cooperating with a toothed wheel which has nominally evenly spaced teeth and which may, for instance, be mounted on the crankshaft of an internal combustion engine. The times at which the teeth pass the sensor are stored. The time intervals between consecutive teeth are calculated, for instance during fuel cut-off operation of the engine. An error in the angular spacing between consecutive teeth is calculated for the time interval between consecutive teeth, a time interval between further teeth disposed symmetrically about the consecutive teeth, and the nominal angular spacing between the further teeth.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: January 26, 1999
    Assignee: Lucas Industries, public limited company
    Inventors: Benjamin James Bradshaw, Anthony Claude Wakeman
  • Patent number: 5857491
    Abstract: A valve arrangement comprises a piezo electric member arranged to control fuel flow through an orifice, the piezo electric member being operable to flex away from the orifice to allow an increased rate of fuel flow therethrough. The piezo electric member is also engageable with a valve member of a pressure relieving valve to control lifting of the valve member from a seating.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: January 12, 1999
    Assignee: Lucas Industries public limited company
    Inventor: Michael Peter Cooke
  • Patent number: 5855420
    Abstract: An electronically controlled brake booster for a vehicle brake system including a housing having a vacuum chamber and a servo chamber separated from the vacuum chamber by a movable wall. The brake booster further includes a control valve operable by an electromagnet. The control valve is coupled to the wall for common relative movement with respect to the housing. The electromagnet is connectable to a control unit generating a drive signal to operate the electromagnet. A braking pressure generation unit is connected to the movable wall for generating a braking pressure for a brake of the vehicle in dependance on the position of the movable wall. The drive signal is generated in the control unit in dependance on a control parameter, the parameter being adjusted in dependance on a dead time of the braking pressure between supplying the electromagnet with the signal and a rising of the braking pressure in response thereto.
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: January 5, 1999
    Assignee: Lucas Industries public limited company
    Inventor: Alan Lawrence
  • Patent number: 5848672
    Abstract: A wear sensing system for the brake linings of a vehicle. Since the sensors are mounted within the brake mechanism, the reduction in the disc thickness must be taken into account to supply an accurate reading. A non-volatile memory stores the position of the brake before replacement and is compared to the position after replacement. However, the latter reading is established only after a predetermined number of brake applications to take up any starting clearances.
    Type: Grant
    Filed: January 6, 1997
    Date of Patent: December 15, 1998
    Assignee: Lucas Industries Public Limited Company
    Inventors: Malcolm Brearley, Andrew John Ward, Dennis John McCann, Paul Antony Fawkes
  • Patent number: 5850138
    Abstract: An electrical generator provides an output at a main stator winding which is excited by a main rotor winding. The main rotor winding is connected via a rectifier to a main exciter rotor winding which is excited by a main exciter field winding. A control circuit controls excitation of the main exciter field winding so as to stabilise the generator output voltage. The control circuit includes a detector for detecting excessive generator output voltage and a transistor switch for connecting a resistor in the current recirculation path of the main exciter field winding so as to prevent transient over-voltages caused by sudden load reductions.
    Type: Grant
    Filed: June 26, 1997
    Date of Patent: December 15, 1998
    Assignee: Lucas, Industries public limited company
    Inventors: Christopher John Adams, Michael David Bailey