Veb excenter reset
AssigneeVolvo Lastvagnar AB
InventorsPer Hansson, Alexander Ölén
Life of this patent
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Abstract
A valve mechanism for an internal combustion engine is operable to selectively open and close a gas exchange valve to accomplish an engine brake during an engine brake mode of an engine. The valve mechanism includes a cam follower in biased abutment against a gas exchange cam element for actuation of a rocker arm connected to the gas exchange valve.
Claims16
Valve mechanism for an internal combustion engine operable to selectively open and close an gas exchange valve to accomplish an engine brake during an engine brake mode of the engine, the valve mechanism comprising:
- a first cam follower in biased abutment against a gas exchange cam element for actuation of a rocker arm connected to the gas exchange valve;
- and
- a reset valve actuator with a second cam follower in biased abutment against a reset valve cam element for actuation of a reset valve,
- wherein the reset valve actuator includes a reset member which is pivotally supported around an axis which is parallel and off set in relation to a pivot axle for the rocker arm.
Exhaust valve mechanism for an internal combustion engine comprising:
- a cam shaft having an exhaust valve cam element including a main lift portion and at least one brake lift portion,
- a rocker arm for mounted on a rocker arm shaft, the rocker arm provided with a first cam follower in biased abutment against the cam element for actuation of the rocker arm, an actuator cylinder formed in the rocker arm, the actuator cylinder housing, an actuator piston slidably arranged in the actuator cylinder, the actuator piston is arranged in abutment with an exhaust valve for selective actuation of the exhaust valve,
- a braking fluid circuit formed in the rocker arm the braking fluid circuit connecting the actuator cylinder with a control valve selectively connecting the braking fluid circuit to a braking fluid supply line or a braking fluid drain line,
- a reset valve being arranged in the braking fluid circuit to open or close a passage between the actuator cylinder and the control valve, and a reset valve actuator mechanism controlling actuation of the reset valve, wherein the reset valve actuator includes a second ca follower in biased abutment against a reset valve cam element for actuation of the reset valve,
- wherein the reset valve actuator includes a reset member which is pivotally supported around an axis which is parallel and off set in relation to a pivot axle for the rocker arm.
Dependencies are inferred from the claim text.