PURPOSE: To reduce the vibrations improving a function as a torque balancer of an engine auxilairy by connecting a flywheel of a turning shaft of the engine auxiliary to a controller in time of partial engine driving.
CONSTITUTION: At the partial cylinder driving of an engine, an electromagnetic clutch 10 makes a flywheel 10 and a turning shaft 6 of an alternator 3 into a state of being locked each, and in time of all cylinder driving, this clutch 10 is controlled so as to make the flywheel 8 and the turning shaft 6 of the alternator 3 into a state of being separated each the other way. That is, an engine driving state is detected by a driving state detecting means from inlet pipe inner pressure (in-manifold pressure) and engine speed or the like, and when the detected result is fed to an electronic control unit 11, it operates the electromagnetic clutch 10 according to the engine driving state detected, thereby forcing the flywheel 8 into a state of being locked or separated. With this constitution, a relative difference between a vibration level in time of the all cylinder driving and that in time of partial cylinder driving being higher than the latter is lessened, whereby a sense of incompatibility against the human body due to a changeover to the driving state is reducible.
MIYAMURA NORIYUKI
AZUMA HIROBUMI
