Fuel pressure control apparatus for cylinder injection engine

摘要

A fuel pressure control apparatus for cylinder injection engine having a fuel injection valve (508) for injecting fuel into a cylinder of an engine, a pipe (542) for conducting the fuel to the fuel injection valve, a fuel pump (511) for supplying the fuel from a fuel supply system to the pipe, a fuel pressure regulator (513) for regulating the fuel pressure within the pipe by discharging the fuel from the pipe to the fuel supply system, and a control unit (515) for making feed-back control on the fuel pressure within the pipe by applying a control signal determined on the basis of an engine operation parameter to the fuel pressure regulator, wherein the fuel pressure regulator is controlled in a feed-forward manner by a predetermined control value so as to make better fuel pressure control at the time of start and when the fuel pressure transiently changes.