Control valve

Details Control valve Control valve

1996-10-25

1998-08-11

Lopez, F. Daniel

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

Activation of one path disables second path

91390, 91376R, 1376275, F15B 1304

Patent

active

057912270

ABSTRACT:
A control valve is disclosed which is capable of supplying a required control pressure to an actuator such as a brake booster, for example. The control valve includes a valve mechanism within a housing, and the valve mechanism comprises a piston which is associated with a solenoid. When the solenoid is excited, the piston is driven for movement to switch a flow path within the housing. In this manner, the atmosphere, acting as a control pressure, is introduced into a variable pressure chamber defined within the housing. The atmosphere which is introduced into the variable pressure chamber is arranged to push back the piston, so that a control pressure which depends on the magnitude of a current passing through the solenoid can be generated within the variable pressure chamber. As compared with a prior art arrangement, the control valve of the invention reduces the cost of the entire arrangement, and allows a piping arrangement for pressure fluid to be simplified.

REFERENCES:
patent: 3082744 (1963-03-01), Gardner
patent: 3605813 (1971-09-01), Nakano et al.
patent: 4565209 (1986-01-01), Ruchser et al.
patent: 5096267 (1992-03-01), Volz
patent: 5235897 (1993-08-01), Watanabe

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