| 摘要 |
<p>Disclosed is a fuel injection control method in the case of a synchronization error. According to the present invention, the fuel injection control method in the case of a synchronization error in a four-stroke engine having four cylinders and not having a cam sensor comprises: a start timing setting step of setting a fuel injection start timing within a range from 180°before the compression top dead center of each of the cylinders to 420°after the compression top dead center; a finish timing setting step of setting a fuel injection finish timing with a range from 300°before the compression top dead center to 540°after the compression top dead center; a synchronization determining step of determining the state of a synchronization through an ECU; and a calibrating step of maintaining the fuel injection start timings and the fuel injection finish timings when the synchronization is determined to be normal in the synchronization determining step, and exchanging the fuel injection start timings and the fuel injection finish timings of a first cylinder and a fourth cylinder among the cylinders with each other and exchanging the fuel injection start timings and the fuel injection finish timings of a second cylinder and a third cylinder among the cylinders with each other when the synchronization is determined to be in error in the synchronization determining step. According to the present invention, in the case of the synchronization error in the engine not having the cam sensor, an increase in the discharge of exhaust gas and deterioration in drivability can be prevented, wherein the increase in the discharge of exhaust gas and the deterioration in drivability are due to an abnormal fuel injection.</p> |
