Patent ID: 7637235

Claim:
A valve timing controller of an engine, comprising: an intake valve; an exhaust valve; an intake cam shaft that opens and closes the intake valve; an exhaust cam shaft that opens and closes the exhaust valve; a valve timing variable mechanism that varies phases of the intake cam shaft and the exhaust cam shaft; a control target value setting unit that sets a control target value for the valve timing variable mechanism according to an engine operation condition; a variable mechanism control unit that controls the valve timing variable mechanism such that the phases of the intake cam shaft and the exhaust cam shaft shift toward the control target value after a control start condition is acquired; a driver's desire judging means that judges whether a rider desires an output increase; and a throttle opening speed detecting means, wherein the variable mechanism control unit shifts the phases of the intake cam shaft and the exhaust cam shaft toward the control target value at a reference update speed when the driver's desire judging means judges that the rider does not desire an output increase when a throttle opening speed detected by the throttle opening speed detecting means is less than a predetermined value, wherein the predetermined value is greater than zero, and the variable mechanism control unit shifts the phases of the intake cam shaft and the exhaust cam shaft toward the control target value at a transient update speed higher than the reference update speed when the driver's desire judging means judges that the rider desires an output increase when the throttle opening speed detected by throttle opening speed detecting means is equal to or higher than the predetermined value and when an acceleration of the throttle opening speed is zero.