US 2002/0152976 A1Published application

Cam actuated continuous simultaneously variable valve timing and lifting assembly

OwnerChinh T. Nguyeninventor

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Abstract

A cam actuated continuous simultaneously variable valve timing and lifting assembly for selectively operating the valve of an internal combustion engine. The valve is actuated by a cam on a camshaft driven by a crankshaft. The cam is in operative engagement with a slider. The slider is selectively movable by a slider actuator within a rocker arm. The slider actuator is selectively extended and retracted by a first motor drive unit. A computer controller operatively controls the motor drive unit to selectively and simultaneously vary the timing and lifting of the valve. A modification of the invention is provided with a second motor drive unit provided with a downwardly extending hexagonal transfer shaft drive assembly having a downwardly extending spherical ball which operatively engages a rocker arm assembly provided with a slider thereon to accommodate the movement of the slider as needed. Another modification of the invention is provided wherein the second motor drive unit is provided with a downwardly extending selectively rotatable screw type rotary driving gear in selective operating engagement with the rotary driven gear which engages the rocker arm to operate the slider as needed.

Claims3

Dependent claims

In a cam actuated continuous simultaneously variable valve timing and lifting assembly for operating the valves-of an internal combustion engine so as to achieve the horsepower and torque at any RPM with the best efficiency in terms of horsepower and/or fuel economy, the combination comprising:

an internal combustion engine cylinder head assembly, said cylinder head assembly provided with at least one standard valve assembly;
a cam actuated continuous simultaneously variable valve timing and lifting assembly provided in operative engagement with said cylinder head assembly;
a motor drive unit mounted on said cylinder head assembly adapted to selectively drive said cam actuated continuous simultaneously variable valve timing and lifting assembly;
a pre-programmed computer controller unit in operative controlling engagement with said motor drive unit;
a slider actuator operatively connected to said motor drive unit, said motor drive unit adapted to selectively extend and retract said slider actuator;
a slider provided in operative engagement with said slider actuator, said slider provided with a rotary gear receiving track;
a rocker arm body pivotally mounted on said cylinder head, said rocker arm provided at one end thereof with a slider receiver opening therein, said rocker arm at its opposite end adapted to selectively operatively actuate said standard valve assembly;
a connector arm in operative engagement with said slider actuator, said connector arm provided with a slider engaging rotary gear adapted to operatively engage said slider gear track so as to selectively move said slider, said slider selectively movable within said rocker arm slider opening, said slider provided with a cam lobe follower roller at the external end thereof;
a crank shaft driven assembly provided with a cam lobe, said crank shaft driven cam lobe assembly in operative engagement with said cam actuated continuous simultaneously variable valve timing and lifting assembly, said cam lobe adapted to operatively engage said slider cam lobe follower roller to simultaneously actuate said rocker arm body to selectively pivotally engage said standard valve assembly so as to selectively provide cam actuated continuous simultaneously variable valve timing and lifting assembly whereby said valve assembly can selectively move to open, advanced open and closed positions.

6 more elements

In a cam actuated continuous simultaneously variable valve timing and lifting assembly for operating the valves of an internal combustion engine so as to achieve the horsepower and torque at any RPM with the best efficiency in terms of horsepower and/or fuel economy, the combination comprising:

an internal combustion engine cylinder head assembly, said cylinder head assembly provided with at least one standard valve assembly;
a cam actuated continuous simultaneously variable valve timing and lifting assembly provided in operative engagement with said cylinder head assembly;
a motor drive unit mounted on said cylinder head assembly adapted to selectively drive said cam actuated continuous simultaneously variable valve timing and lifting assembly;
a pre-programmed computer controller unit in operative controlling engagement with said motor drive unit;
a second motor gear drive unit provided on said cylinder head, said second motor drive unit provided with a downwardly extending selectively rotatable rotary drive gear engaging rod;
a rotary driving gear fixedly mounted on said rotary driving gear engaging rod so as to be selectively rotatable therewith;
a rotary driven gear provided in an operative engagement with said rotary driving gear so as to be rotatable therewith;
a hexagonal transfer shaft drive assembly fixedly mounted on said rotary driven gear so as to be selectively rotatable therewith, said hexagonal transfer shaft drive assembly having a downwardly extending spherical ball having rocker arm gear engaging means;
a rocker arm body pivotally mounted on said cylinder head, said rocker arm having a spherical ball receiving socket so as to operatively engage said spherical ball;
a slider slidably provided in said rocker arm said slider provided with gear track means so as to operably engage said spherical ball provided in said rocker arm socket so as to be operatively engaged thereby.

7 more elements

Dependencies are inferred from the claim text.