Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1987-09-28
1990-02-13
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303119, 25112915, B60T 842, B60T 802
Patent
active
049001043
ABSTRACT:
A fluid pressure modulation valve, particularly adapted for use within an anti-lock brake system, includes a housing having a fluid inlet port for force input, an outlet port for force output, and an axial channel in fluid communication with inward apertured ends of both the inlet and outlet ports. Further provided is a piston which is radially centered about and secured to a piston rod; the piston is slideably mounted within the axial channel, wherein the piston and piston rod possess an axial range of travel extending from downstream of the apertured end of the outlet port. The piston and piston rod are fluidly sealed within the axial channel at both the upstream and downstream ends. At the upstream end, the piston rod extends beyond the upstream fluid seal. Disposed within the inlet port, outlet port, and the connecting axial channel is a fluid, such as a hydraulic liquid. Yet further provided is a linear motor for the selective reciprocation of the extending upstream and of the piston rod responsive to external control signals applied to the linear motor. The movement of the piston relative to the apertured end of the outlet port will operate to modulate the pressure outlet therefrom responsive to the electrical input to the linear motor.
REFERENCES:
patent: 3679270 (1972-07-01), Jania
patent: 3851930 (1974-12-01), Grosseau
patent: 3880476 (1975-04-01), Belart et al.
patent: 4083609 (1978-04-01), Cochran
patent: 4121872 (1978-10-01), Burgdorf et al.
patent: 4670271 (1987-06-01), Pasternak
patent: 4756391 (1988-07-01), Agarwal et al.
Le Mark T.
Oberleitner Robert J.
Silverman Melvin K.
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