Abstract: A master cylinder includes: a cylinder body; an isolation wall provided inside the cylinder body, arranged between a first chamber and a second chamber to isolate the first chamber and the second chamber, wherein, the isolation wall is integrally formed with the cylinder body; a first piston; a second piston; a first rod provided in connection with the first piston; a second rod provided inside the cylinder body, being in connection with the first piston, wherein, the second rod is supported in the isolation wall; and a cap provided at a first opening of the cylinder body, the first opening is at an end of the second chamber along the axial direction. A brake-by-wire system including the master cylinder is also disclosed herein.

Abstract: A compression brake system of an internal combustion engine includes a mechanical system for coupling a camshaft to a brake actuator assembly. The mechanical system includes a stationary housing defining an aperture and a lifter is slidably disposed in the aperture. A resilient element is disposed between the housing and the shoulder and configured to bias the lifter toward the camshaft. The mechanical system is dedicated to compression braking, and therefore the camshaft may have a lobe optimized for braking.

Abstract: A brake system for a vehicle includes: a brake activation element; an input piston displaceable by at least a predefined minimum actuator travel distance when the brake activation element is operated; an output piston to which a driver braking force is transmittable from the brake activation element via the displaced input piston such that an internal pressure in a piston-cylinder unit of the brake system is increased; a first brake booster; and a spring device which, when the brake activation element is operated for an actuator travel distance which is less than the minimum actuator travel distance, is deformed in such a way that transmission of the driver braking force to the output piston is prevented.

Abstract: The invention relates to a master brake cylinder arrangement of a motor vehicle brake system with a master brake cylinder housing, a transmission piston disposed in a displaceable manner in the master brake cylinder housing, and a force input member which can be workingly coupled to the transmission piston in order to introduce a braking force. According to the invention, in order to simplify assembly and to reduce the required construction space, an adapter is coupled to the master brake cylinder housing, to which adapter a contact sleeve is fitted, the force input member being supported at the contact sleeve in a non-actuated starting position.

Abstract: A compression brake system of an internal combustion engine includes a mechanical system for coupling a camshaft to a brake actuator assembly. The mechanical system includes a stationary housing defining an aperture and a lifter is slidably disposed in the aperture. A resilient element is disposed between the housing and the shoulder and configured to bias the lifter toward the camshaft. The mechanical system is dedicated to compression braking, and therefore the camshaft may have a lobe optimized for braking.

Abstract: In order to create a hydraulic transmitting device for vehicles, in particular, for vehicles steered by handlebars, comprising a housing with a hydraulic master cylinder, in which a movable piston is arranged, an actuating lever movable relative to the housing and a push rod transferring movement of the actuating lever to the piston, wherein the push rod is supported on the actuating lever, wherein the push rod is adjustable in the direction of a longitudinal axis as a result of rotation about this axis and wherein the push rod can be secured relative to the actuating lever in specific rotary positions around the longitudinal axis by means of a locking device, with which the assembly thereof is less complicated it is suggested that the locking device comprise a locking element, that the locking element have at least one locking vane and that the at least one locking vane abut with a locking surface on a locking section of the push rod deviating from a circular cross section in a flexible manner and acted upon

Abstract: In a plunger master brake cylinder (1), the closed end (5) of the main bore (3) is manufactured in one piece with the housing (2). The pistons (6,7) are inserted from the open end (4) of the main bore (3). In order to prevent the pistons (6,7) from slipping out of the main bore (3) prior to assembly in the vehicle, a retaining pin 23 is provided, which has a length greater than the diameter of the pistons (6,7) and than the diameter of the open end (4) of the main bore (3). The pin 23 extends through radial holes (20) in the spring retainer (13) of the compression spring 12 coupled to the outer piston (7). The pin is inserted through a small radial opening 26 in the housing 2 and is limited in its outward movement by a step (25) in the main bore (3).

Abstract: An intake apparatus of an engine according to the present invention comprises; an air cleaner unit for filtering intake air defining an air passageway therein and filtering intake air; and a turbocharger-intercooler unit mounted at a lower portion of the air cleaner unit and compressing and cooling air supplied to the engine. An outlet air passageway of the supercharger-intercooler unit is configured to contact an air passageway of the air cleaner unit.

Abstract: A master cylinder apparatus for a BBW system is provided, which eliminates a risk of brake delay, even with the use of a plunger-type master cylinder, and which therefore is able to achieve a reduction in size of a master cylinder. The master cylinder apparatus comprises a tandem-type master cylinder connected to wheel cylinders through fail-safe valves and a stroke simulator for ensuring a desired stroke of a brake pedal upon receiving a brake fluid introduced from a fluid pressure chamber in the master cylinder. The master cylinder is arranged in the form of a plunger-type master cylinder in which cup seals are provided on an inner surface of a bore of the cylinder body. A spring force of a second return spring for a secondary piston is set to be larger than that of a first return spring for a primary piston. A retracted position of the secondary piston is limited by a stopper pin extending through an oblong hole formed in the secondary piston.

Abstract: A master cylinder realizes a stroke simulator function without the need to change the structure around a brake pedal and without impairing brake pedal feel, is easy to form by machining, and also facilitates a hydraulic fluid charging and air bleeding operation. A secondary piston is split to make the axial length thereof variable, thereby imparting the stroke simulator function to the secondary piston. By doing so, brake pedal feel is improved more than by separately adding a stroke simulator.

Abstract: A master cylinder for a vehicle hydraulic brake system, in which the master cylinder includes a body having a stepped bore formed therethrough and at least one piston disposed within the stepped bore. A plug is preferably permanently fixed to one end of the bore providing for a leak tight seal at the end of the bore. The master cylinder preferably includes a spring assembly having a pin with a longitudinally regular end portion which is retained in a bore of the piston.

Abstract: Repeatable no-backlash adjustable hydraulic stops are disclosed which have a rigid body which defines a cavity. One or more elastically deformable end plates are mounted in closing relation to the body cavity for enclosing and encapsulating an amount of liquid therein. A plunger in the body is movable in fluid displacing relation to the cavity for providing an accurate elastic displacement of the enclosing end plates which elastic displacement or movement is accurately repeatable by rotating an actuator rod which engages the plunger for varying the fluid displacing relationship to the interior of the cavity. An initial static pressure is formed within the cavity for pre-stressing the components and providing for no-backlash adjustment. Locating pads are formed exteriorly of the flexible walls defining an accurate stop position.

Abstract: An object of the present invention is to provide a master cylinder in which the buckling of spring is prevented and the packing is not damaged. To achieve this object, in a master cylinder in which a return spring is disposed between the end wall of a cylinder and a piston, and a packing fitted to the piston slides on the inner peripheral wall of the cylinder, the return spring 30 comprises a cylindrical large-diameter coil portion A with a diameter almost in contact with the inner peripheral wall of the cylinder 12 and a small-diameter coil portion B with a diameter enough smaller than the diameter of the inner peripheral wall of the cylinder 12, and the installation length of the small-diameter coil portion B is set so as to be nearly equal to a length of the range in which the packing 24 slides.

Abstract: The invention relates to a master cylinder comprising a body (12) comprising a bore (14) in which slides, in leaktight manner, at least one piston (16, 18) movable between a rest position and at least one working position and defining at least one pressure chamber (20, 22) connected to an application fluid system, the piston (18) having a peripheral groove (44). According to the invention, a finger (42) actuated by an external mechanism (46) is capable of entering the groove (44) so as to lock the piston in one of its positions.

Abstract: Structure for caging a return spring of a master cylinder to define limits for an operational chamber. The structure includes a first cylindrical member which engages a first piston and a second cylindrical member which engages a second piston with the return spring being located between the first and second cylindrical members. A stud which has an irregular shaped end member is retained in a groove in the second piston by the second cylindrical member and mated with a head member to define the limits for the return spring between the first and second cylindrical members and correspondingly the maximum size of the chamber within a bore of a master cylinder.

Abstract: A hydra-jack screw apparatus is provided for exerting a force against an object, for adjusting the magnitude of the force exerted against the object, and for providing a visual indication of the magnitude of the force exerted against the object. The apparatus is comprised of a base member housing a piston chamber, a jack screw extending from the bottom of the base member, a fluid pressure gauge mounted on the base member, and a pair of pistons received in the piston chamber for reciprocating movement. One of the pistons has a piston rod that extends through a center bore of the jack screw and engages against an object against which a force is to be applied. The second piston has a piston rod that extends from the piston chamber of the base member and is attached to a manual forced adjusting knob. A volume of fluid is contained in the piston chamber between the first and second pistons, and as the manual knob is turned, the pressure of the volume of fluid is adjustably increased or decreased.

Abstract: Hydraulic brake systems are known wherein, for the purpose of brake control, a counterforce is built up in the booster (60) for actuation of the master brake cylinder which results in unloading the master brake cylinder. What is disadvantageous in the known system is that this counterforce also resets the pedal (pedal piston 3) so that vehement pedal movements will result from the control action. Therefore, our present invention suggests to interpose a transmission device (3, 4, 5, 6, 7) between the pedal and the actuator (booster) enabling to decouple actuator and pedal.

Abstract: A restraining strap for use with a clutch actuator of the type including a master cylinder, a slave cylinder, a conduit interconnecting the master cylinder and slave cylinder, and a piston in the slave cylinder moved reciprocally in the bore of the slave cylinder housing in response to operation of the vehicle clutch pedal. The clutch actuator is delivered in prefilled form without out output member of the slave cylinder, which is assembled by the motor vehicle manufacturer as a part of the clutch release lever assembly, and a restraining strap is provided to maintain the piston of the slave cylinder in a retracted position to maintain the prefilled system in a pressurized state and preclude the entry of air into the system during shipment, storage and installation of the system.

Abstract: The brake pressure generator (1) includes a tandem master cylinder (2) actuable by two booster pistons (19, 32) to which a hydraulic auxiliary pressure is applied and by a pedal actuating mechanism (17,18). A control valve (14, 20) controls the auxiliary boost pressure. The control valve, through an actuator (16), cooperates with the pedal actuating mechanism (17,18). One booster piston (32) is disposed on the bottom of the tandem master cylinder (2) adjacent the push rod (22). Normally-open valve (37) closes when brake pressure exceeds boost pressure to trap fluid in chamber (34).

Abstract: A brake system with anti-skid control and/or traction slip control is disclosed. This system includes a pedal-operated braking pressure generator and an auxiliary-force-generating system connected between the brake pedal and the braking pressure generator for generating auxiliary forces for assisting the pedal force or for generating an opposed force dependent on the brake pedal travel, the rotational behavior of the wheels and on predetermined control patterns. Control elements in the form of electric linear motors or hydraulically or vacuum-driven servomotors are used for generating the auxiliary forces.

Abstract: A hydraulic actuating and locking device includes a locking piston within a cylinder, an actuating piston within a cylinder in the rear surface of the locking piston and a pressure multiplier connected to the space behind the piston. A passage, constituting a high pressure cylinder, connects the space behind the piston to an oil reservoir and is adapted to receive and be sealed by the high pressure piston of the pressure multiplier.

Abstract: A master cylinder provides a housing defining a reservoir and movably carrying a pair of pistons within a bore in communication with the reservoir. The pair of pistons cooperate with the housing to substantially define a pair of pressure chambers which communicate with respective brake circuits. One of the pistons forms a cavity to receive a reaction piston and the one piston also carries a proportioning valve. The reaction piston forms an auxiliary chamber within the one piston and the proportioning valve is exposed to the auxiliary chamber. The reaction piston extends outwardly into one of the pressure chambers to engage the housing and the valve member is responsive to the fluid pressure in the other pressure chamber to control fluid communication between the auxiliary chamber and the reservoir.

Abstract: An apparatus for use in the generation of impulses, comprising a stepped piston assembly having a large piston and a small piston mechanically linked to one another and reciprocable between forward and rearward positions with the large piston being located in a large cylinder and having a large rearward face in communication with a reservoir for compressed fluid, and with the small piston having a small forward face for delivering the impulse; wherein the stepped piston assembly has an auxiliary piston located between the large piston and the small piston which auxiliary piston is mechanically linked to the large piston and which is reciprocable in an auxiliary cylinder, and wherein there is provided a valve through which fluid can flow from the volume enclosed by the large cylinder forward of the large piston into the volume enclosed by the auxiliary cylinder rearward of the auxiliary piston.

Abstract: A power operated actuator assembly incorporates a stop mechanism for opposing movement of an actuating member if a booster fluid supply is operative. The stop mechanism comprises a chamber which is supplied with a metered proportion of pressurized fluid when the actuating member is moved such that the greater the force on the actuating member, the greater will be the magnitude of the force due to the pressurized fluid opposing movement of the actuating member.

Abstract: A tandem master cylinder for a vehicle split hydraulic braking system which has disc brakes in one part of the system and drum brakes in the other half. One of the pistons in the master cylinder is prevented from developing a substantial pressure until a predetermined pressure is developed by the other piston by virtue of a control piston working in a blind bore in one of the pistons. Hydraulic fluid is trapped in a control chamber formed by the blind bore and the control piston by a first valve means and released by a second valve means at the predetermined pressure. The arrangement allows pressure to the disc brakes to be delayed while pressure to the drum brakes is overcoming the effects of the usual pull-off springs.

Abstract: A booster operated master cylinder piston for use in an anti-skid braking system includes a modulator piston located between the master cylinder piston and the booster valve assembly. In the event of a skid the pressure of booster fluid acting on the modulator piston is equalized across the modulator piston.

Abstract: A vehicle brake booster and master cylinder assembly has a vacuum suspended booster section and a hydraulic booster section in series, and a master cylinder unit in series with the booster sections. During normal operation the vehicle operator obtains boosted brake actuating pressures from the master cylinder by operation of the hydraulic booster section throughout the normal stroke of both booster sections without operating the vacuum booster section. If additional brake actuating pressure is required after the hydraulic booster has reached its run-out condition, the master cylinder is actuated normally through mechanical force transmitting elements which are parts of the booster sections. If there is no hydraulic pressure available for hydraulic booster operation, the control valves of the booster sections move from the first range of operation which normally controls the hydraulic booster section to a second range of operation which actuates the vacuum booster section.