Device to actuate a gas shuttle valve in an internal combustion engine
AssigneeTRW Deutschland GmbH
InventorsKlaus Gebauer, Stefan Kellermann
Life of this patent
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Abstract
A device for the actuation of a gas shuttle valve in an internal combustion engine that allows an optimization of both engine performance and fuel consumption by providing a variable valve lift. The lift of the gas shuttle valve can be varied by adjusting the effective axial distance of the actuators. As needed, the valve lift is increased or decreased in order to either improve engine performance or fuel consumption.
Claims13
A device to actuate a gas shuttle valve in an internal combustion engine, having a drive element that acts on a valve stem by moving the valve stem across a valve lift in an axial direction, two actuators, one of the two actuators being located on each side of the drive element at a distance from each other in the axial direction and at least one return spring, the valve lift being variable by adjusting the distance between the actuators, at least one of the actuators having at least one skewed surface bearing axially on a corresponding ramp surface on a wedge which can be moved transversely to the axial direction, and movement of the wedge transversely to the axial direction causing the valve lift to be varied continuously.
A device to actuate a gas shuttle valve in an internal combustion engine, having a drive element that acts on a valve stem by moving the valve stem across a valve lift in an axial direction, two actuators, one of the two actuators being located on each side of the drive element at a distance from each other in the axial direction and at least one return spring, wherein the valve lift is variable by adjusting the distance between the actuators,
- wherein the return spring is supported on a buttress that can be adjusted axially for maintaining a consistent spring force in the closed position of the valve independent of the current value of valve lift,
- wherein the buttress is supported on at least one ramp surface on a wedge that can be moved transversely to the axial direction.
Dependencies are inferred from the claim text.