CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE AND CONTROL METHOD THEREFOR

摘要

The temperature at the tip of a fuel injection valve (31) is estimated based on first to third parameters. The first parameter is a parameter that indicates the combustion temperature, such as the fuel injection amount and the combustion timing. The second parameter is a parameter that indicates the heat exposure timing and the heat exposure time. Examples of the second parameter include the engine speed and the combustion timing. The third parameter is a parameter that indicates the temperature increase of the fuel along with a decrease in pressure of the fuel at the injection hole (31b, 31c), such as the pressure of the fuel in the fuel injection device (3).