| 摘要 |
PURPOSE:To enhance fuel economy and drivability, by providing judging means for judging where the present place is a level land or a highland and a compensating means for compensating the spark advance of an engine if it is a highland. CONSTITUTION:Upon operation other than idle operation, a basic spark advance THB is obtained in accordance with a rotational speed NE and an intake-air pipe pressure PM at the step P26. When the intake-air pipe pressure PMA is 650 mm.Hg, a value in a memory area A is added with 5 at the step P32, and is then stored. A compensation computing process is carried out in accordance with the operating condition of the engine at the step P28 to obtain a final spark advance THF. With this arrangement, a desired spark advance may be obtained irrespective of a level land or a highland, and therefore, fuel economy and drivablility may be enhanced. |
