| 摘要 |
A variable valve timing system for a vehicle includes an intake camshaft for operating an intake valve, an exhaust camshaft for operating an exhaust valve, an intake cam sprocket mounted on the intake camshaft, an exhaust cam sprocket mounted on the exhaust camshaft, a chain interconnecting the intake cam sprocket and the exhaust cam sprocket, and a device for varying phases of the intake and exhaust camshafts by, according to an engine rpm, pushing and pulling the chain to forcedly rotate the intake and exhaust cam sprockets at a predetermined angle while moving in a perpendicular direction with respect to a longitudinal direction of a power transmission member.
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