Operating brake valve for an electrically and pneumatically actu

Details Operating brake valve for an electrically and pneumatically actu Operating brake valve for an electrically and pneumatically actu

1993-05-12

1995-03-07

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Multiple control

Fluid and electric

303 14, 303 28, 303 50, 303DIG3, 303 20, 303 3, 188151A, B60T 1504, B60T 1514, B60T 1368

Patent

active

053951646

ABSTRACT:
An operating brake valve for an electrically and pneumatically actuated braking system in a motor vehicle has a movable thrust piece (2) arranged within a housing (1) and a balance piston (4) actuated via a graduated spring (3), whereby a combined inlet/exhaust valve (7, 9, 10) is arranged downstream of the balanced piston. A position sensor (20) is provided which can be actuated via a push rod (17) connected to the thrust piece (2). A stop valve (29) is located in the connecting line (26) to the reservoir (12) or in the control line (15) coming from the balance chamber, whereby an electrically controlled solenoid valve (40) is provided for actuating the stop valve and, in the nonexcited state, for relieving the valve body of the stop valve (29) opposite to its closing direction.

REFERENCES:
patent: 4002373 (1977-01-01), Mori
patent: 4161341 (1979-07-01), Reinecke et al.
patent: 4166654 (1979-09-01), Snodgrass
patent: 4576416 (1986-03-01), Muller et al.
patent: 4818036 (1989-04-01), Reinecke
patent: 4819992 (1989-04-01), Angelillo
patent: 4861115 (1989-08-01), Petersen
patent: 5129712 (1992-07-01), Feldmann et al.
patent: 5145239 (1992-09-01), Meise et al.
patent: 5251966 (1993-10-01), Friederichs et al.
patent: 5294190 (1994-03-01), Feldmann et al.

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