Device for controlling or regulating fuel pressure in internal combustion engine with direct injection changes control gain if demand fuel pressure changes by more than defined amount

摘要

The engine has various engine parameter sensors, a direct fuel injector, a pump for delivering fuel to the injector, a fuel pressure detector for detecting the fuel pressure acting on the injector, a fuel pressure change device for setting the real fuel pressure and a controller for controlling the fuel pressure to the desired value by feedback control. The control gain is changed if the demand pressure changes by more than a defined amount.