Internal-combustion engine of the type with at least one cylinder working in degraded mode
AssigneeIfp
InventorsThierry Colliou, Stéphane Venturi, Yoann Viollet
Life of this patent
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Abstract
The present invention relates to an internal-combustion engine comprising at least one cylinder (10, 12, 14, 16) including intake means with an intake valve (22), exhaust means with an exhaust valve (32) and control means (40, 42) for controlling opening/closing of the valves, said control means comprising drive means (44) and means (56) intended for motion and load transmission between said control means and the valve to be controlled. According to the invention, motion and load transmission means (56) comprise a rocker arm (58) with at least two rockers (72, 74) disengageable from a pad (62) controlling the motion of said valve.
Claims14
An internal-combustion engine,
- comprising at least one cylinder including intake means with an intake valve, exhaust means with an exhaust valve, a system for controlling opening/closing of the valves, the system for controlling opening/closing of the valves comprising a camshaft carrying a plurality of cams, drive means for driving the camshaft and a rocker arm with at least two rockers, each of which is disengageable from a pad controlling the motion of one of the intake valve or the exhaust valve, each of the cams cooperating with each of the at least two rockers, wherein one of the cams comprises a cam profile -cooperating with one of the rockers that is different from the cam profile -of the other cam cooperating with the other rocker.
Dependencies are inferred from the claim text.