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AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsKiyoshi Shimizu, Yoshihiro Fujiyoshi
Estimating the term…
The lever ratio of rocker arms of an internal-combustion engine is varied to control intake air flow so that the internal-combustion engine can be easily restarted. A query is made to see if the present swing angle is equal to an optimum swing angle for restarting the internal-combustion engine and, if the response is negative, a query is made to see if a motor for changing the lever ratio of the rocker arms is to be driven for rotation in the normal direction. If the motor is to be driven for rotation in the normal direction, the motor is driven accordingly. If the motor is to be driven for rotation in the reverse direction, the motor is driven accordingly.
A valve controller for controlling an intake valve of an internal-combustion engine, the internal-combustion engine comprising a cylinder head, intake and exhaust camshafts having cams engaged therewith and being disposed in an upper portion of the cylinder head, an exhaust valve, rocker arms pivotally supported on intake and exhaust rocker shafts so as to be driven for rocking motion by respective cams of the intake and exhaust camshafts to respectively operate the intake valve and the exhaust value, a lever ratio of the respective rocker arm of the intake valve specifying a distance between an axis of the intake rocker shaft and a point at which the respective cam applies pressure to the respective rocker arm, the lever ratio being variable to regulate intake air flow, the valve controller comprising:
A method of controlling an intake valve of an internal-combustion engine, the internal-combustion engine comprising a cylinder head, intake and exhaust camshafts having cams engaged therewith and being disposed in an upper portion of the cylinder head, an exhaust valve, rocker arms pivotally supported on intake and exhaust rocker shafts so as to be driven for rocking motion by respective cams of the intake and exhaust camshafts to respectively operate the intake valve and the exhaust valve, a lever ratio of the respective rocker arm of the intake valve specifying a distance between an axis of the intake rocker shaft and a point at which the respective cam applies pressure to the respective rocker arm, the lever ratio being variable to regulate intake air flow, the method of controlling the intake valve comprising the steps of:
Dependencies are inferred from the claim text.