Brake pressure modulating valve

Details Brake pressure modulating valve Brake pressure modulating valve

1980-12-11

1982-11-09

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Load control

Responsive to fluid pressure spring

303 15, B60T 818

Patent

active

043581633

ABSTRACT:
A vehicle brake system fluid modulating valve has a main piston acted upon by a control spring and master cylinder pressure on one hand and an opposing brake system on the other hand. A slave piston is also acted upon by the master cylinder pressure, and is arranged to control an operating point at which the main piston effects brake pressure modulation. This control is effected by cutting off the master cylinder pressure to the slave piston when the operating point is reached. Electrical transducers sense vehicle load and master cylinder pressure, respectively, and their output signals are processed by a comparator for consequential operation of the valve to cut-off the master cylinder pressure to the slave piston. The operating point is altered by balancing the master cylinder pressure signal in response to changes in the vehicle load signal.

REFERENCES:
patent: 3276822 (1966-10-01), Lister et al.
patent: 3729237 (1973-04-01), Ishikawa et al.
patent: 3981543 (1976-09-01), Atkins
patent: 4289358 (1981-09-01), Dufft et al.

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