Abstract: A drive arrangement for driving a rotary component of a fuel pump comprises a resilient member associated with either a drive shaft or the rotary component and engageable with a surface associated with the other of the drive shaft and rotary component. In use, where a braking force greater than a predetermined level is applied to the rotary component, the member rides out of engagement with the surface permitting relative rotary motion of the drive shaft and rotary component.

Abstract: A fuel control system for a gas turbine engine includes series-connected first and second metering valves for providing a metered fuel flow to an engine supply line. A downward failure condition in either valve is detected by a detector which produces a signal representative of such failure. A changeover device operates in response to the failure signal to place the system in a condition in which a sufficient metered fuel flow is maintained via the non-failed valve.

Abstract: A fully hydraulic brake power generator/master cylinder unit (10) for a vehicle brake system has a housing (12) with a bore (14) which is formed therein and in which a primary piston (16) is arranged sealingly and displaceably. Located in the bore (14) is a first pressure chamber (22), one boundary wall of which is formed by one end wall (20) of the primary piston (16). In order to actuate the unit (10), there is an input member (60) which is displaced during actuation. A hydraulic booster stage (38), which has a booster chamber (44) with an inlet for hydraulic fluid under pressure, acts on the primary piston (16). In order to improve the simulation of brake pressure feedback via the input member (60), a spring arrangement (70) is provided, with a first spring (72) and a second spring (74) which are connected in series. The spring force of the second spring (74) is detectably greater than the spring force of the first spring (72).

Abstract: An electrically-operated disc brake assembly for vehicles is disclosed in which a friction member is adapted to be applied to a rotatable brake disc by a brake-applying apparatus including an electric motor, and transmission in the form of a linear actuator comprising a screw device adapted to apply an axially-directed brake-applying force to the friction member in response to operation of the motor. The screw device comprises inner and outer co-operating screw-threaded members, and one of the members is adapted to co-operate with the armature of the electric motor.

Abstract: A fully hydraulic brake booster/master cylinder unit (10) for a vehicle brake system has a housing (12) and a bore (14) which is formed therein and in which is arranged sealingly and displaceably a primary piston (16) which is coupled to an input member (40) for transmitting an actuating force to the primary piston (16). Located in the bore (14) are a first pressure chamber (22), one boundary wall of which is formed by one end wall (20) of the primary piston (16), and a first booster chamber (46), one boundary wall of which is formed by the other end wall (50), located opposite the end wall (20), of the primary piston (16). The first booster chamber (46) has an inlet for hydraulic fluid under pressure which is used for boosting the actuating force. In order to bring about additional brake boosting comfortably and as required, there is arranged in the bore (14) a second booster chamber (48), to which hydraulic fluid under pressure can be supplied independently of the first booster chamber (46).

Abstract: An outwardly opening fuel injector comprises a valve needle movable within a bore and engageable with a seating to control the supply of fuel from the bore, the needle being moveable outwardly of the bore to move the needle away from its seating, the needle being biased towards its seating by a spring, the spring engaging a spring abutment arrangement associated with a part of the needle remote from the part thereof engageable with the seating, the spring abutment arrangement further acting to guide movement of the needle.

Abstract: A vacuum brake booster (10) has a control valve housing (30) for a control valve (28) actuated by a bar shaped input member (34). A guide sleeve (42) is secured to the control valve housing and has a slot (68) aligned with a vent duct (62) in the control valve housing. A sensing plunger (36) is axially slidable in the guide sleeve by the input member, and a transversely extending stop bar (66) is fixed to the sensing plunger. The stop bar extends through the slot of the guide sleeve and into the vent duct. To improve flow through the vent duct, edges of the slot form axial stops for the stop bar, so that the axial extension of the slot defines the maximum stroke of the sensing plunger. Where the stop bar extends into the vent duct, the vent duct is obliquely oriented towards a working chamber (26), and has an axial extension considerably larger than that of the slot.

Abstract: In a valve arrangement with a first and a second fluid connection (7, 9), a valve element (3) which is biased into a first position by a spring arrangement (4), in which the first and the second fluid connections (7, 9) are blocked from each other, an actuation means (17) in order to bring the valve element (3) into a second position in which the first and the second fluid connections (7, 9) are in a primary flow connection (A), a relatively large flow cross-section between the fluid connections is to be made, on the one hand, the force to be exerted by the actuation means, on the other hand, is to be relatively low in order to save costs, efforts, as well as installation space.

Abstract: An electrical power-assisted steering system is disclosed comprising a brushless electric motor (1) which has a plurality of phase windings connected at a start point and in which a switching means (13) such as a relay is provided in at least one phase of the motor, the switching means being movable between a closed position in which current is able to flow in the phase winding and an open position which prevents current flowing in the respective phase in the event of a fault. Also disclosed is a substantially rigid connector assembly (19) onto which is mounted the switching means (13), conductors (20) for connecting the motor phase windings and a motor position sensor (21) to an associated motor control means (6), the connector acting as a support for the motor stator, which simplifies the steps involved in assembly.

Abstract: The invention relates to a pressure accumulator which may be used in an electronically controllable vehicle braking system for a motor vehicle. In an electronically controllable vehicle braking system with a cylinder/piston arrangement (i.e., a master cylinder) providing a brake fluid , a brake pedal actuates the cylinder/piston arrangement to provide brake fluid acting on the brake of the motor vehicle. The cylinder/piston arrangement is connectable with a pump arrangement and the pressure accumulator.

Abstract: A reservoir assembly for a vehicle hydraulic braking system includes two chambers (2, 3) for the storage of hydraulic fluid. The reservoir assembly is provided with a structure for increasing the effective volume of one of the chambers (2), for example a bellows (12) or a bucket (30), and which may be operable in conjunction with the fitting of a filler cap (17) to seal a filler opening (5) for that chamber. This enables a volume of fluid to be accommodated in a chamber of increased volume, thereby substantially eliminating the possibility of volume in excess of a given volume from overflowing from the chamber (2, 3). When the reservoir assembly is installed in a vehicle braking system of a brake-by-wire electro-hydraulic type (EMB) having a first power circuit (51), and a second back-up hydrostatic circuit (60), the one chamber (2) supplies fluid to the hydrostatic circuit, and the other chamber (3) supplies fluid to the power circuit.

Abstract: A spring assembly comprises a helical compression spring engaged between first and second spring abutments and a collar limiting movement of the second spring abutment away from the first spring abutment.

Abstract: A fuel injector comprises first and second housing parts, the first housing part being located within a bore or recess formed in the second housing part, the housing parts defining therebetween an inlet chamber, a delivery chamber axially spaced from the inlet chamber, and a filtration flow path interconnecting the inlet and delivery chambers to remove particulate contaminants from the flow of fuel therebetween.

Abstract: An electrical power-assisted steering system comprising a brushless electric motor which has a plurality of phase windings connected at a star point and in which a switching device such as a relay is provided in at least one phase of the motor, the switching device being movable between a closed position in which current is able to flow in the phase winding and an open position which prevents current flowing in the respective phase in the event of a fault.

Abstract: The invention relates to a vehicle brake system of a motor vehicle, with an electronically controllable brake booster, comprising 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 an electro-magnetic actuator, wherein a pressure difference between the pressure chamber and the vacuum chamber is adjustable, with the movable wall changing its position as a function of the pressure conditions in the vacuum chamber and in the pressure chamber, thereby actuating a master cylinder, with the electromagnetic being supplied with current signals by an electronic control unit during operation, which the electronic control unit generates as a function of driving dynamics conditions or external influences, characterised in that upon the presence of certain driving dynamics conditions or external influences, or combinations thereof which render the actuation of the master cylinder necessary with a predetermined probability with

Abstract: 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 an electromagnetic actuation device, through 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 device, 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, characterised 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 the first or the second pressure changin

Abstract: A compliance unit (8) for use in an hydraulic braking system is disclosed which is adapted to absorb hydraulic fluid from a master cylinder (1) during normal braking and, in the event that a fault in the braking system is detected the unit is adapted to return fluid to the master cylinder (1). The compliance unit (8) therefore effectively decreases its compliance in the event of a fault. The unit (8) may comprise a pair of pistons (14, 15) working in a stepped bore against a first and second biasing force, with a third variable biasing force provided to cancel out the second biasing force during normal operation to provide an increased compliance.

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 means of hydraulic pressure. For sealing, the brake piston (20) is sealed off relative to the bore (18) by means of 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.

Abstract: A brake-pressure-transmitter arrangement (1) for a hydraulic motor-vehicle brake system, after an actuating force (F) has been introduced via an input member (brake pedal 2), by reduction in the volume of a hydraulic chamber (4) to be filled with brake fluid, provides a brake pressure at the output of the hydraulic chamber (4) for at least one wheel brake (3). In addition to the hydraulic chamber (4), there is a hydraulic chamber (6) for brake fluid, and the volume of this hydraulic chamber (6) is likewise reduced after introduction of the actuating force (F). To amplify the brake force, an output of this additional hydraulic chamber (6) is in fluid connection with the input side (10e) of a booster pump (10), which delivers brake fluid in the direction from the additional hydraulic chamber (6) to the at least one wheel brake (3).

Abstract: An axle journal (20), especially for the front axle of a front wheel drive motor vehicle comprises a main body (30) made of shaped sheet metal parts (32, 34) which enclose a circumferentially extending cavity (36). The cavity (36) houses portions (43) and (46) of mounting components (brake carrier member 42 and a combination 45 steering tie rod mount and transverse link seat) which portions stiffen the axle journal (20). The section of the cavity not taken up by the stiffening portions of the mounting components may be foam-filled. This composite-structure axle journal can be manufactured at low cost due to the reduced mechanical finishing required and can sustain heavy loads, whereby it meets present day requirements of lightweight construction.