Dual deceleration and pressure-sensitive proportioning valve

Details Dual deceleration and pressure-sensitive proportioning valve Dual deceleration and pressure-sensitive proportioning valve

1986-10-30

1988-04-12

Kashnikow, Andres

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

303 241, 303 84R, B60T 1300, B60T 800, B60T 846

Patent

active

047369892

ABSTRACT:
A dual proportioning valve assembly (10) for a vehicle braking system comprises a housing (12) having a pair of inlets (29, 30) and outlets (31, 32), a bore (25) within the housing (12) containing a pair of oppositely disposed differential pistons (40, 140) biased apart by a main spring (200). The first and second differential pistons (40, 140) have associated first and second poppet valves (50, 150) which control fluid flow between the respective inlet and outlet. A cage member (60) extends within the first differential piston (40) and is connected with the first poppet valve (50), the cage member (60) extending longitudinally within the bore (25) and having an interior chamber (70) with an inertia-sensing mass (80) therein. The inertia-sensing mass (80) engages a third poppet valve (94) which controls fluid flow between the interior chamber (70) and a variable volume chamber (100) defined by the cage member (60) and a stationary piston ( 160) which engages the cage member (60). The stationary piston (160) abuts a shoulder (13) of the housing (12) and extends into the second differential piston (140) where it is connected with the second poppet valve (150) controlling fluid flow between the respective inlet (30) and outlet (32). The stationary piston (160) and cage member (60) are biased apart by a plunger spring (205).

REFERENCES:
patent: 3252740 (1966-05-01), Stelzer
patent: 3727987 (1973-04-01), Shellhouse
patent: 4281880 (1981-08-01), Gaiser et al.
patent: 4284308 (1981-08-01), Hayashida

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