Abstract: A system, device and method of sealing a fluid accumulator assembly to a modulator body in a hydraulic fluid brake system provides a fluid modulator having a body with at least one fluid passageway formed therein. At least one socket is formed in a surface of the body in communication with the at least one fluid passageway. An accumulator assembly includes a housing with an open end. The open end includes a tapered lead-in, the tapered lead-in being positioned in the socket. The socket includes a seizing taper configuration, the angle of the seizing taper being complementary to an angled portion of the tapered lead-in. The housing of the accumulator includes a stake groove. Material from the body is staked into the stake groove, retaining the accumulator to the body thereby.

Abstract: An ABS hydraulic modulator concept designed for application in vehicle braking systems is presented. The design utilizes an integrated hybrid approach of dual apply/release solenoid control and single solenoid/isolation valve assembly control. Opening of the single solenoid induces an ABS release and causes the isolation valve assembly to close effecting wheel brake pressure reduction.

Abstract: A vehicle wheel brake system having a service braking section and a wheel lock control (ABS) section is provided. Under certain conditions the wheel lock control section may not be able to generate sufficient pressure to operate the vehicle wheel brakes when the master cylinder output pressure has been isolated from the wheel brakes. When such conditions occur, the displacement piston of the ABS control section moves to open a bypass valve which connects master cylinder output pressure to the vehicle wheel brake even though the ABS system has isolated it from that wheel brake. The bypass valve is a two-stage orifice valve arrangement which provides orifice control of master cylinder pressure during initial brake actuation and provides two stage valve opening action when the master cylinder output pressure is to be delivered to the wheel brake to actuate that brake irrespective of the attempted control of the wheel brake by the ABS section of the brake system.

Abstract: A vehicle vacuum power system which insures sufficient vacuum power to operate a vacuum brake booster and a vacuum operated road speed control system. Because of the low vacuum, high flow rate needs of a cruise control system, the cruise control is connected directly to the engine manifold through a check valve. A small orifice from the vacuum pump in parallel with engine manifold vacuum provides sufficient vacuum for the cruise control when the manifold vacuum is not sufficient. The vacuum pump is in series with manifold vacuum and is operated in response to a pressure switch which allows the pump to run only when brake booster vacuum is low. Manifold vacuum is sufficient most of the time, but the orifice to the cruise control tends to cause a fast loss of brake booster vacuum, causing the vacuum pump to run when it is not actually needed. The vacuum regulator shuts off the flow through the orifice when it is not needed, considerably reducing the pump operational time.