| 摘要 |
PROBLEM TO BE SOLVED: To improve fuel consumption and output by the optimization of intake/ exhaust efficiency as well as smooth operating characteristics from a low speed range to a high speed range or during acceleration/deceleration. SOLUTION: Two camshafts are arranged at either one of a pair of valves that are an intake valve and an exhaust valve. A cam and a rocker arm are disposed at each valve, and the camshaft is provided with a cam phase angle variable means. COPYRIGHT: (C)2004,JPO
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