| 摘要 |
PURPOSE:To improve startability at a low temperature starting condition by calculating a compensation coefficient from a temperature of cooling water in consideration of a start time so as to perform switching of compensation, when an adjustment of swirl in air flow is compensated by means of respective compensation coefficients at the opening and closing time. CONSTITUTION:Intake valves 16a, 16b, and exhaust valves 18a, 18b ar provided in a cylinder bore 12. A swirl control valve 32 is arranged in an intake port 12b. When the swirl control valve 32 is closed, air is sucked only from an intake port 12a so as to form the swirl. The swirl control valve 32 is controlled by a negative pressure delay valve 42 and a solenoid 3 direction switching valve 44. The solenoid valve 44 is controlled by a control circuit 50 which receives input signals from an intake pressure sensor 52, crank angle sensors 54, 56, an air-fuel ratio sensor 58, a throttle sensor 59, and a cooling water temperature detector 62, so that the swirl may be generated so as to improve startability at a low temperature starting condition, even in the case when difference between the atmospheric pressure and an intake pressure is small and a swirl adjustment means in its is opening condition. |
