| 摘要 |
PURPOSE:To perform stable warming and to improve fuel consumption by providing means for detecting the warming condition and means for selecting between the ignition timing corresponding with basic air/fuel ration and the ignition timing corresponding with a modified target air/fuel ratio with correspondence to the warming condition. CONSTITUTION:When the engine water temperature is dropped, it is brought to over rich air/fuel ratio and ignition timing selection means 9 will select the ignition timing corresponding with the modified target air/fuel ratio. Upon proceeding of engine warming, it is brought to lean basic air/fuel ratio and said means 9 will select the ignition timing corresponding with the basic air/fuel ratio. Consequently, the ignition timing can be set optimally with correspondence to the air/fuel ratio under warming condition thus to bring near to MBT. Consequently, maximum torque can be produced to stabilized the warming operation and to improve fuel consumption under this operating area.
|
