| 摘要 |
PROBLEM TO BE SOLVED: To improve starting capability of an engine and exhaust gas emission, by properly setting a share ratio between the amount of the fuel to be injected into the inside of a cylinder and that to be injected into an air-intake pipe, taking into consideration the particulated condition of the fuel into the cylinder at the time of engine start. SOLUTION: When an engine is under control for start-up, the whole required amount of fuel injection for start-up is determined based on the temperature of the engine water (S1-S3), and then, referring to the share table based on the pressure of the high pressure fuel, an in-cylinder share of the fuel injection against the whole required amount of fuel injection, that is, a share ratio, is determined (S4-S5). Then, the amount of fuel to be injected into the inside of a cylinder through an in-cylinder injector is determined by multiplying the whole required amount of fuel injection by the share ratio, thereby setting the fuel injection pulse width (S6, S7). Thereafter, the amount of fuel to be injected outside a cylinder through an outside-cylinder injector is determined by multiplying the whole required amount of fuel injection by the complement number of the share ratio (1-share ratio), thereby setting the fuel injection pulse width (S8, S9). This makes it possible to avoid supplying fuel at a time when the injection fuel in particulate form is of poor quality, thereby improving the starting capability of the engine. |
