Fuel control system for cylinder injection type internal combustion engine

摘要

A cylinder injection type fuel control system for an internal combustion engine ensuring normal ignition and combustion of air fuel mixture while effectively utilizing two-stroke fuel injection includes sensors (1) for generating a variety of information concerning operation state of the internal combustion engine engine operation state detecting device (11) for detecting an engine operation state (D) on the basis of the various information and fuel injectors (2) disposed so as to inject fuel directly into a combustion chamber of each engine cylinder. An injection mode setting device (12A) selectively sets a fuel injection mode (M) to either a one-stroke fuel injection mode or a two-stroke fuel injection mode in dependence on the engine operation state. An injector driving device (13) drives the fuel injectors (2) in accordance with the selected fuel injection mode. An engine operation state information storing device (14) stores preceding engine operation state information as operation history information of the engine before current operation is started. The injection mode setting device (12A) selectively sets a current fuel injection mode in succession to the engine starting on the basis of the preceding engine operation state information (Dp). When the preceding engine operation state information does not satisfy a predetermined operating condition representing a sufficiently heated state of spark plug within the combustion chamber, the two-stroke fuel injection mode is inhibited from being validated.