Engine valve actuation system
First Claim
1. An engine valve actuation system, comprising:
- an intake valve moveable between a first position to prevent a flow of fluid and a second position to allow a flow of fluid;
a cam assembly mechanically connected to the intake valve to move the intake valve between the first position and the second position;
a fluid actuator configured to selectively prevent the intake valve from moving to the first position;
a fluid rail having a first end and a second end, the fluid rail configured to supply fluid to the fluid actuator;
a directional control valve selectively controllable to move between a first position to prevent a flow of fluid from the fluid rail to the fluid actuator and a second position to allow a flow of fluid from the fluid rail to the fluid actuator;
a source of fluid in fluid communication with the first end of the fluid rail; and
a control valve in fluid connection with the second end of the fluid rail, the control valve being selectively controllable to move between a first position to prevent a flow of fluid from the fluid rail and a second position to allow the flow of fluid from the fluid rail.
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Accused Products
Abstract
An engine valve actuation system is provided. An intake valve is moveable between a first position to prevent a flow of fluid and a second position to allow a flow of fluid. A cam assembly is connected to move the intake valve between the first position and the second position. A fluid actuator is configured to selectively prevent the intake valve from moving to the first position. A source of fluid is in fluid communication with the fluid actuator. A directional control valve is configured to control a flow of fluid between the source of fluid and the fluid actuator. A control valve is disposed between the source of fluid and the directional control valve. The control valve is moveable between a first position to prevent the flow of fluid between the source of fluid and the directional control valve and a second position to allow the flow of fluid from the source of fluid to the directional control valve.
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Citations
21 Claims
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1. An engine valve actuation system, comprising:
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an intake valve moveable between a first position to prevent a flow of fluid and a second position to allow a flow of fluid;
a cam assembly mechanically connected to the intake valve to move the intake valve between the first position and the second position;
a fluid actuator configured to selectively prevent the intake valve from moving to the first position;
a fluid rail having a first end and a second end, the fluid rail configured to supply fluid to the fluid actuator;
a directional control valve selectively controllable to move between a first position to prevent a flow of fluid from the fluid rail to the fluid actuator and a second position to allow a flow of fluid from the fluid rail to the fluid actuator;
a source of fluid in fluid communication with the first end of the fluid rail; and
a control valve in fluid connection with the second end of the fluid rail, the control valve being selectively controllable to move between a first position to prevent a flow of fluid from the fluid rail and a second position to allow the flow of fluid from the fluid rail. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An engine valve actuation system, comprising:
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an intake valve moveable between a first position to prevent a flow of fluid and a second position to allow a flow of fluid;
a cam assembly connected to move the intake valve between the first position and the second position;
a fluid actuator configured to selectively hold the intake valve at a position between the first position and the second position;
a fluid rail having a first end and a second end, the fluid rail configured to supply fluid to the fluid actuator;
a directional control valve selectively controllable to move between a first position to prevent a flow of fluid from the fluid rail to the fluid actuator and a second position to allow a flow of fluid from the fluid rail to the fluid actuator;
a source of fluid in fluid communication with the first end of the fluid rail; and
a control valve in fluid connection with the fluid rail, the control valve being selectively controllable to move between a first position to prevent a flow of fluid relative to the fluid rail and a second position to allow the flow of fluid relative to the fluid rail. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification