Internal combustion engine with variable valve gear
AssigneeMitsubishi Jidosha Kogyo Kabushiki Kaisha
InventorShinichi Murata
Life of this patent
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Abstract
Each cylinder is provided with a first intake valve and a second intake valve, and a first intake cam for driving the first intake valve and a second intake cam for driving the second intake valve are coaxially pivotally supported on an intake camshaft. A first cam phase change mechanism which varies respective phases of the first and second intake cams relative to a crankshaft of the internal combustion engine is combined with a second cam phase change mechanism which varies a phase of the second intake cam relative to the first intake cam. The second cam phase change mechanism is set to have a variable-phase angular range wider than that of the first cam phase change mechanism.
Claims5
An internal combustion engine with a variable valve gear, wherein each cylinder is provided with a first intake valve and a second intake valve, and a first intake cam for driving the first intake valve and a second intake cam for driving the second intake valve are coaxially pivotally supported on an intake camshaft, and the intake camshaft is configured so that a first intake camshaft to which the first intake cam is fixed and a second intake camshaft to which the second intake cam is fixed are located coaxially, the internal combustion engine comprising:
- a first cam phase change mechanism which varies respective phases of the first and second intake cams relative to a crankshaft of the internal combustion engine;
- and
- a second cam phase change mechanism which varies a phase of the second intake cam relative to the first intake cam,
- the second cam phase change mechanism being set to have a variable-phase angular range wider than that of the first cam phase change mechanism,
- the second cam phase change mechanism varying a phase of the second intake camshaft relative to the first intake camshaft, and
- the first cam phase change mechanism varying the phase of the second cam phase change mechanism relative to the crankshaft.
Dependencies are inferred from the claim text.