Fluid-pressure and analogous brake systems – Load control
Patent
1992-07-08
1993-11-09
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Load control
188195, 188356, 303 228, 303 50, B60T 818, B60T 826
Patent
active
052596664
ABSTRACT:
The invention relates to a double brake booster for a motor vehicle, provided with a valve enabling the boost ratio to be varied as a function of the load of the vehicle. In addition to two pistons (64, 66) articulated to an arm (72), this valve comprises a pusher (80) driven by a third piston (68), to a first face of which is applied a first force representative of the load of the vehicle and to a second face of which is applied a second force of elastic nature, in opposition to the first, this third piston adopting, under the effect of the first and second forces, an equilibrium position which determines that of a variable bearing point for the lever which constitutes the arm (72). Moreover, the arm, the pusher and the three pistons are mounted in the same body, the arm and the pusher being housed in a single cavity (74) which is defined in this body and subjected to a low pressure, and toward which the second faces of the three pistons are turned.
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Bendix Europe Services Techniques
Butler Douglas C.
Decker Ken C.
Palguta Larry J.
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