| 摘要 |
PROBLEM TO BE SOLVED: To correct a fuel injection so as to provide an optimum air-fuel ratio without detecting any exhaust pressure by correcting a basic injection quantity of fuel on the basis of a ship speed, a trim angle, and an engine condition when an engine is operated at a high speed. SOLUTION: A ship speed sensor 50 and a PTT operation sensor 47 detecting an operating condition of a power trim and tilt device are arranged in a hull, while an engine rotational speed sensor 23, an engine temperature sensor 48, a throttle opening sensor 30, and an intake temperature sensor 49 are arranged in an engine, and their output signals are inputted to a fuel injection controller 41. It is determined whether the engine is operated at a high speed or not, and if it is NO, fuel is injected in a basic injection quantity. On the other hand, if it is YES, a trim angle and a ship speed are detected and computed, and on the basis of these computed values, a correction value for a fuel injection quantity is found, and then, fuel is injected in the injection quantity based on the correction value. In this way, the fuel injection quantity can be corrected so as to provide an optimum air-fuel ratio without detecting any exhaust pressure. |
