Internal combustion engine with variable valve gear
AssigneeMitsubishi Jidosha Kogyo Kabushiki Kaisha
InventorShinichi Murata
Life of this patent
Estimating the term…
Abstract
In an engine with a cam phase change mechanism which is disposed on one end portion of an intake camshaft and variably changes a phase of a drive cam of an intake valve relative to a crankshaft, the cam phase change mechanism is configured so that two vane-type hydraulic actuators of which variable-phase torques produced at the same supplied oil pressure are different are arranged axially relative to the intake camshaft.
Claims6
An internal combustion engine with a variable valve gear comprising a first intake valve and a second intake valve in each cylinder and a cam phase change mechanism which is disposed on one end portion of an intake camshaft and varies phases of drive cams of the first and second intake valves relative to a crankshaft of the engine, wherein the cam phase change mechanism is formed of a first vane-type hydraulic actuator that varies, the phase of the drive cam of the first intake valve and a second vane-type hydraulic actuator that varies the phase of the drive cam of the second intake valve;
- the first vane-type hydraulic actuator varies the phase of the drive cam of the first intake valve and a phase of the crankshaft of the engine;
- the second vane-type hydraulic actuator varies the phase of the drive cam of the second intake valve and the phase of the drive cam of the first intake valve;
- and
- variable-phase torques produced at the same supplied oil pressure is larger in the first vane-type hydraulic actuator than in the second vane-type hydraulic actuator.
Dependencies are inferred from the claim text.