| 摘要 |
<p>PURPOSE:To improve the drivability of an engine by detecting a loan condition of the engine, and giving a regulation to change from a low-speed mode to a high-speed mode when a predetermined load or more is discriminated just after it is determined that an engine representative temperature reaches a predetermined temperature or more. CONSTITUTION:A fuel injection valve 5 is provided close to a suction port of an engine 1. By controlling an oil pressure generated by an oil pump 7 through an electromagnetic valve 8 and a change control valve 9, the valve timing and lift quantity of a valve unit 6 can be changed in stages. The electromagnetic valve 8 for changing the valve timing and lift quantity is controlled by an output signal from an electronic control circuit 10 as well as the fuel infection valve 5. When a predetermined load or more is discriminated just after it is determined that an engine representative temperature reaches a predetermined temperature or more, a regulation is given to change from a low-speed mode to a high-speed mode.</p> |
