Spark ignition internal combustion engine

摘要

A spark ignition internal combustion engine is equipped with a fuel pressure sensor for detecting a viscosity of fuel supplied to a fuel injector based on a variation in a fuel pressure. In a case of stratified combustion by a spray guided injection, an ECU advances a fuel injection start timing of the fuel injector 4 according to the detected viscosity of the fuel. Thus, even if the viscosity of the fuel is significantly high, the fuel-rich area is well formed at a vicinity of the discharge electrode so that a preferable combustion condition can be maintained.

主权项

1. A spark ignition internal combustion engine in which a fuel starts to be combusted by a spark generated by a spark plug, the spark ignition internal combustion engine comprising:
a fuel viscosity detector which detects a viscosity of the fuel; a fuel injector which injects the fuel into a cylinder of the spark ignition internal combustion engine; and a controller which varies at least one of a fuel injection timing and a fuel injection control pattern of the fuel injector according to the viscosity of the fuel detected by the fuel viscosity detector; wherein the fuel injector directly injects the fuel into the cylinder, and the controller varies at least one of the fuel injection timing and the fuel injection control pattern of the fuel injector according to the viscosity in a case that a stratified combustion is conducted.