Fuel injection amount controller for engines

摘要

A fuel injection amount controller for engines capable of decreasing the shocks caused by the correction of increasing or decreasing the amount of fuel at the time of changing over the operation mode. The fuel injection amount controller includes an operation condition detector for detecting the operation conditions of an engine inclusive of an intake pipe pressure and a crank angle. An air-to-fuel ratio controller controls the air-to-fuel ratio of the engine to a ratio more lean than stoichiometric when operation conditions represent a predetermined operation condition. A pressure deviation detector calculates a pressure deviation in the intake pipe pressure within a predetermined period of time or between predetermined crank angles. A fuel amount correction device injects the fuel in an amount corresponding to the pressure deviation when the deviation is not smaller than a predetermined value. A correction coefficient change-over device changes a correction coefficient for the amount of fuel over to a suppressing direction in response to a timing for changing the operation condition at the stoichiometric air-to-fuel ratio and the operation condition at the lean air-to-fuel ratio over to each other.