Gm Global Technolgoy Operations, Inc.

Delphi Technologies, Inc.

Beijingwest Industries Co., Ltd.

James William Zehnder, Ii

William Charles Kruckemeyer

Gary Lee Johnston

Michael Leslie Oliver

Timothy Allen Haerr

Gary Chris Fulks

Richard Edward Longhouse

Douglas E Poole

Michael William Hurtt

Alan H Green

Timothy M Schlangen

Donald L Parker

Schuyler Scott Shaw

David Fredrick Reuter, Ii

David John Barta

Craig A Osterday

Herbert Stanley Summers, Iii

Robert Lee Phillis

Jay Michael Shores

Frank M Robinson

Elaine Ann Ruble

John C Layman

Timothy Michael Schlangen

Larry R Miller

Stephen Carey Hagwood

Vivek V Mohile

Michelle Kay Goecke

Scott D McCoy

Chris C Carter

John Dudley Altevers

A hydraulic mount apparatus includes a housing having an upper portion and a lower portion disposed on a center axis and defining a housing chamber. A partition member is disposed in the housing chamber dividing the housing chamber into a pumping chamber and a receiving chamber. The pumping chamber extends between the upper portion and the partition member. The receiving chamber extends between the lower portion and the partition member. A decoupler is attached to the partition member separating the pumping chamber and the receiving chamber. A moving member is disposed in the pumping chamber and attached to the decoupler. The moving member is made from a non-elastomeric polymer sheet secured to the decoupler for providing the additional damping force.

MR mount apparatus using a polymeric sheet decoupler

A hydraulic mount apparatus includes a housing having an upper and a lower portion disposed on a center axis and defining a housing chamber. A partition member is disposed in the housing chamber dividing the housing chamber into a pumping chamber and a receiving chamber. The pumping chamber extends between the upper portion and the partition member. The receiving chamber extends between the lower portion and the partition member. A decoupler attaches to the partition member separating the pumping and the receiving chambers. A moving member of elastomeric material, disposed in the pumping chamber, attaches to the decoupler. The moving member is molded from a first elastomeric material having a first hardness level and a second elastomeric material having a second hardness level with the first hardness level and the second hardness level being different from one another. The second hardness level is less than the first hardness level.

MR mount with a dual hardness rubber decoupler

A brake apply master cylinder includes a body and a piston assembly. The body includes a bore. The bore has a longitudinal axis, a closed front end, a primary fluid outlet fluidly connectable to a primary brake circuit, and a secondary fluid outlet fluidly connectable to a secondary brake circuit. The piston assembly includes a single brake apply piston positioned in the bore. The piston assembly fluidly divides the bore into a primary fluid chamber in fluid communication with the primary fluid outlet and a secondary fluid chamber in fluid communication with the secondary fluid outlet. Another brake apply master cylinder includes a body, a piston assembly, and a return spring assembly. The return spring assembly is positioned in the bore of the body and extends from the closed front end of the bore to a return-spring seat of a single brake apply piston of the piston assembly.

Brake apply master cylinder

An assembly for sensing travel by a piston in a master cylinder comprises a magnet and a retainer for retaining the magnet proximate the piston. An orientation screw engages an axial slot in the piston to inhibit rotation of the piston.

Retainer for brake master cylinder travel sensor

A brake master cylinder-sensor system and method are provided. The system includes a master cylinder, a piston slidably positioned in the master cylinder, a magnet positioned on the piston, and a sensor disposed on the master cylinder. A change of piston linear position causes a linear change in a magnetic field position sensed by the sensor, and a brake control signal proportional to the change of piston linear position is generated. A method of operating a brake master cylinder-sensor system includes applying a brake pedal force, changing a piston linear position within a master cylinder, determining a change in a linear magnetic field position proportional to the change of the piston linear position, and generating a brake control signal based on the change in the linear magnetic field position.

Brake master cylinder-sensor system and method

A brake vacuum booster assembly is provided that includes a power piston with a two-piece member movable relative thereto for opening a valve when a brake pedal is applied. The two-piece member includes a cylinder and a cylinder cap. The cylinder has a passageway vented to atmosphere for providing air to air chamber in the booster. An electric actuator is retained within a cavity in the cylinder for coacting with the valve to more quickly open the valve during a rapid brake pedal apply. A cylinder cap is connected to an end of the cylinder for retaining the electric actuator within the cavity. The cylinder cap has an opening aligned with the passageway. A retaining mechanism is arranged between the cylinder and the cylinder cap for preventing axial and rotational movement of the cylinder cap relative to the cylinder to securely retain the electric actuator within the cavity and maintain alignment of the opening and passageway.

Vacuum booster with retaining mechanism for cylinder cap

A self contained, supplemental vacuum assist unit is provided for use with a vacuum brake booster and a source of vacuum in a motor vehicle. The unit includes, within a single housing, an electric motor, an air pump driven by the motor, a manifold defining air exhaust and assist vacuum chambers, a pair of check valves permitting air flow from the pump outlet and the assist vacuum chamber to the air exhaust chamber, an outlet from the air exhaust chamber with a fitting for connection to the vacuum source, an opening from the assist vacuum chamber with a fitting providing communication directly to the interior of the vacuum chamber of the booster, and a pressure sensor including a diaphragm, plunger, magnet with a Hall effect sensor and motor control circuitry on a circuit board within the assist vacuum chamber. The unit is compact, light weight and efficient and is designed for attachment directly to the booster with no intervening vacuum hose therebetween.

Self contained, supplemental vacuum assist unit for vehicle brake booster

A brake booster provides additional boost capacity without unduly increasing booster size and weight by providing a vacuum pump connected so as to add its additional vacuum capacity to that of the normal vacuum source when activated in response to sensed approaching run-out. The additional vacuum is provided by connecting the vacuum pump in a second conduit between the vacuum source and the booster vacuum chamber in parallel with a first conduit connecting the vacuum source directly with the booster vacuum chamber, with check valve means in the first and second conduits preventing substantial vacuum loss from the vacuum chamber. Approaching run-out is signaled by a sensor responsive to a vacuum level in the working chamber; and control means are responsive to a predetermined low value of the sensed vacuum level in the working chamber to activate the vacuum pump and thus increase the vacuum level in the vacuum chamber over that produced by the vacuum source, whereby a greater pressure differential is available across the booster diaphragm before run-out is encountered. An optional sensor responsive to vacuum level in the vacuum chamber enables the vacuum pump to be additionally used for backup of the vacuum source while still providing the functionality of the invention in most cases. The venting of the vacuum pump to the vacuum source reduces released noise which might otherwise require bulky noise filter apparatus.

Vehicle brake booster with supplemental vacuum assist

A vacuum brake booster provides a braking speed of application enhancement by increasing the air valve opening when a vehicle operator applies braking force quickly and forcefully. This is accomplished with a two part air valve which is normally expanded axially to a normal length by an internal spring but which may be shortened to open the air valve by a greater amount when the brake pedal input force is sufficient to move the air valve axially against another spring into contact with a shoulder of the power piston. The internal spring has a much higher preload than the other spring so that the booster operates with a fully axially expanded air valve in normal, low force brake activation. Once the air valve axially engages the power piston, however, the increase in air valve opening is immediate and substantial with any further increase in braking force. The air valve has an air valve input element having a pin projecting radially outward into an opening in a side wall of an air valve output element surrounding the air valve input element so as to axially engage a side of the opening to limit expansion of the air valve by the spring and thus define the normal axial length of the air valve.

Brake booster with compressible air valve for braking speed of application enhancement

A brake apply system includes a power booster in which, when released and at-rest, a leg of a stop engages a clip and an extension of a valve body engages the clip so that an annular rib of the valve body is axially spaced away from the stop by a distance G. At the same time, a first valve seat is engaged with a first annular valve element closing a pressure supply conduit off from a variable pressure chamber and a second valve seat is spaced away from a second annular valve element by a distance T, opening the variable pressure chamber to an atmospheric pressure chamber. When the power booster is applied, the second valve seat moves the distance T and engages the second annular valve element closing the variable pressure chamber off from the atmospheric pressure chamber and the first valve seat separates from the first annular valve element opening the pressure supply conduit to the variable pressure chamber. The stop moves against the annular rib of the valve body so that when the pushrod is initially released the second annular valve element moves away from the second valve seat a distance equal to G+T. A pressurized air supply communicates with the power booster and includes a compressor and a dryer. When the compressor is turned off a solenoid valve opens and a quantity of dry air contained in a regeneration reservoir passes through the dryer, regenerating the dryer.

Pneumatic assisted brake apply system

A braking system generally provides pressure equalization between the sides of a split braking circuit. The amount of equalization provided is limited to enable the introduction of purposely induced pressure variances. A result is that unintentional pressure variations are moderated and intentional target pressure variations are easily obtainable. The braking system provides power braking operation in response to a manually actuated master cylinder. Fluid pressure is transmitted through isolation valves directly to the wheel brakes. The braking system also provides power operation in response to a powered pump. The pump delivers pressurized fluid through a controllable supply valve. When the supply valve is open, the isolation valve(s) are shifted to provide open fluid communication path between proportional pressure control valves and the wheel brakes. The pressure equalization effecting device is isolated from the master cylinder pressurized circuit during base brake operation.

Pressure equalization in a proportionally regulated fluid system

In a vehicle braking system, integral control and isolation valves are used to individually control the brake line pressure to each wheel brake and to provide pedal isolation for each brake channel. The system is operable on a single fluid or a separated fluid system with an integrated power source. Full proportional anti-lock braking and traction control is provided to each selected wheel independently. The system is applicable as a two, three or four channel base brake system.

Integral control and isolation valve proportional brake system

A hydraulic power booster for a brake apply system includes a mechanically actuated hydraulic booster of compact design that can be integrated in line with a conventional type master cylinder. Additionally, a combination of twin mechanically actuated check valves is arranged to provide a structure with essentially no leakage when the hydraulic booster is at rest and when the hydraulic booster is at poise. A mechanically actuated check valve is normally held open and is positioned in a passageway between the power piston and a fluid reservoir. This check valve is substantially, immediately closed upon the application of force to the brake pedal. Another mechanically actuated check valve is provided in a passageway between the hydraulic power supply and the power piston. This check valve is mechanically opened to supply a selected amount of pressurized fluid to the power piston which generates a selected amount of vehicle braking in response to actuation of the brake pedal.

Hydraulic power booster for a brake apply system

A turnable pneumatic suspension system is provided wherein proper air flow to the diaphragm is ensured through a charging route that is maintained in a securely sealed condition and which includes a nonrotatable point of attachment to a remote pressurization device. The pneumatic suspension system includes an air spring and a damper in combination, mounted to rotate relative to a vehicle with a dynamic seal provided between a nonrotatable seal ring and mating components of the air spring facilitating rotation of the suspension module while the entrance to the air charging route of the suspension module remains stationary.

Pneumatic suspension system

A proportional fluid pressure regulation system is provided using a combination of a proportional valve and a shuttle valve for fluid flow control. A system of fluid pressure regulation is achieved where the desired pressure output is provided by one of two pressure input sources. The two pressure input sources are alternately selected by operation of a pilot operated shuttle valve and a solenoid operated proportional valve. The two pressure sources may comprise a manually actuated vehicle braking system's master cylinder and a power operated fluid pump.

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Tipp City, OH, United States of America

James William Zehnder, Ii