Ignition-timing control for engine

Abstract

Abstract PURPOSE:To automatically carry-out warming operation on cold start with the simple constitution by carrying-out warming operation by changing the ignition timing to the optimum advance angle position or the position close to the optimum advance angle position in the idling state on cold start. CONSTITUTION:When the existence of idling state is judged in P3, the program advances into P5, and engine temperature is judged. When the engine temperature is low, the advance angle position theta for warming operation is calculated in P6. The obtained advance angle position theta is the value ranging from a fixed advance angle position theta1 to an optimum advance angle position, and the advance angle position comes closer to the optimum advance angle position as the engine temperature is lower. The advance angle position comes closer to the optimum advance angle position, the combustion efficiency of the engine is improved, and the number of revolution increases. Therefore, the warming operation on cold start can be automatically carried-out with the simple constitution.

Inventors

• 👤 Hiroyuki Iwai
• 👤 岩井　弘之

Bibliographic Details