Valve for force-reversing modulator

Details Valve for force-reversing modulator Valve for force-reversing modulator

1974-07-24

1976-07-06

Cohan, Alan

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

91 47, 91420, 137DIG8, 303 21F, F15B 13044

Patent

active

039676366

ABSTRACT:
A control valve for use with a force-reversing modulator in a vehicle adaptive braking system is disclosed. The valve includes a housing divided into a first section connected to one side of the modulator, a second connected to engine manifold vacuum, and a third section connected to the other side of the modulator. A solenoid valve controls communication between the first section and air at atmospheric pressure. Upon actuation of the solenoid valve, the first section is communicated to air at atmospheric pressure to thereby communicate the one side of the modulator to atmospheric air. The high pressure air in the first section acts against a piston reciprocal within the housing to open another valve connecting the third section with the second section, to thereby communicate the other side of the modulator with engine manifold vacuum. Upon deenergization of the solenoid valve, a flow-restricting orifice communicates the first and second chambers to thereby communicate the one side of the modulator with engine manifold vacuum, and the other side of the modulator is connected with atmospheric air through a bleed orifice communicating the third section with the atmosphere.

REFERENCES:
patent: 3789735 (1974-02-01), Tam et al.
patent: 3790224 (1974-02-01), Ritsema

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