ENGINE CONTROL SYSTEM

摘要

An engine control system is a system configured to selectively switch between first fuel and second fuel and perform an operation control of a single engine, including: a sensor configured to detect an oxygen concentration of an exhaust gas that is exhausted from the engine; and a control device configured to perform an air-fuel ratio feedback control such that an air-fuel ratio becomes a target air-fuel ratio based on an output signal of the sensor, wherein the control device calculates a correction coefficient of an air-fuel ratio feedback control during an operation with the second fuel, and further stores a fuel composition correction coefficient that is a value in a predetermined range and corrects a difference between the calculated correction coefficient and a targeted correction coefficient arising from a change in composition of the second fuel.

主权项

1. An engine control system configured to selectively switch between a first fuel and a second fuel and perform an operation control of a single engine, the engine control system comprising:
a sensor configured to detect an oxygen concentration of an exhaust gas that is exhausted from the engine; and a control device configured to perform an air-fuel ratio feedback control such that an air-fuel ratio becomes a target air-fuel ratio based on an output signal of the sensor, wherein the control device comprises:
a correction device configured to calculate a correction coefficient of an air-fuel ratio feedback control during an operation with the second fuel and further correct a difference between the calculated correction coefficient and a targeted correction coefficient arising from a change in composition of the second fuel;a storage device configured to store a fuel composition correction coefficient that is a value in a predetermined range; anda limiting device configured to set a limit to a changing range when the fuel composition correction coefficient is stored.