CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE OF VEHICLE

摘要

When the temperature in a cylinder of an engine is low, the fuel injection amount of fuel that has a low vapor pressure and is less likely to be vaporized is increased, and the fuel injection amount of fuel that has a high vapor pressure and is more likely to be vaporized is reduced, so that the start timing of the engine can be kept constant. When the temperature in the cylinder is high, the fuel injection amount of the fuel that has a low vapor pressure and is more likely to be decomposed is reduced, and the fuel that has a high vapor pressure and is less likely to be burned (decomposed) is increased, so that the start timing of the engine can be kept constant. Thus, the start timing of the engine is kept constant irrespective of the fuel property, and deterioration of the drivability can be curbed.

主权项

1. A control system that automatically stops and automatically restarts an internal combustion engine of a vehicle, the control system comprising:
an electronic control unit configured to a) set a fuel injection amount when the internal combustion engine is automatically restarted such that the fuel injection amount is reduced as a temperature in a cylinder of the internal combustion engine at a time of automatic restart is higher, and b) set a relationship between a vapor pressure of a fuel and the fuel injection amount, based on the temperature in the cylinder such that a rate of change of the fuel injection amount relative to the vapor pressure increases as the temperature in the cylinder is higher.