Electrohydraulic valve for controlling operation of an engine cylinder valve
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United States of America Patent
Stats
-
Nov 22, 2005
Grant Date -
Jul 14, 2005
app pub date -
Jan 8, 2004
filing date -
Jan 8, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electrically operated valve controls the flow of oil to and from a device that activates and deactivates a cylinder of a multi-cylinder engine. A first valve seat is between an inlet and a workport connected to the device and a second valve seat is between the workport and an outlet. A valve element engages the first valve seat when a solenoid actuator is energized. The valve element and the first valve seat cooperate to allow air to bleed from the inlet through the valve upon starting the engine, but prevent the oil from flowing in that path unless the solenoid actuator is energized. In one version of the valve, the valve element engages the second valve seat when disengaged from the first valve seat. In a second version, another valve element engages the second valve seat when oil flows through the first valve seat.
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