Device for controlling at least one valve in an internal combustion engine
AssigneeVolvo Truck Corporation
InventorPer PERSSON
Life of this patent
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Abstract
A gas valve actuation device for an internal combustion engine includes a first arrangement for actuating two gas valves in a first lift event, a second arrangement for selectively actuating a first one of the two gas valves in a second lift event, a fluid circuit for controlling actuation of the first gas valve in the second lift event, wherein the fluid circuit includes a first fluid circuit valve which is arranged to be controlled by the first actuation arrangement.
Claims26
A gas valve actuation device for an internal combustion engine, wherein the device comprises
- first means for actuating two gas valves in a first lift event,
- second means for selectively actuating a first one of the two gas valves in a second lift event,
- a fluid circuit for controlling actuation of the first gas valve in the second lift event,
- wherein the fluid circuit comprises a first fluid circuit valve, which is arranged to be controlled by the first actuation means,
- wherein the first fluid circuit valve is arranged to be open when the two gas valves are not actuated for the first lift event and closed when the two gas valves are actuated for the first lift event, for creating conditions for achieving an exact positioning of the second actuation means an engaged state thereof.
A device according to 3, wherein the device comprises a valve bridge extending between the two gas valves for actuating both gas valves in the first lift event, wherein the first rocker arm is adapted for actuating the two gas valves via the vale bridge, wherein the valve bridge comprises an opening in register with the first one of the two gas valves, wherein the device comprises a pin slidably arranged in the opening and wherein the second rocker arm is adapted for selectively actuating the first one of the two gas valves via the sliding pin.
(canceled)
Dependencies are inferred from the claim text.