CONTROL SYSTEM OF ENGINE

摘要

A control system of an engine is provided. The control system includes an exhaust emission control catalyst provided in an exhaust passage, a deceleration fuel cutoff module for performing a deceleration fuel cutoff when a deceleration fuel cutoff condition is satisfied in an engine decelerating state, a purging unit for performing a purge to supply a purge gas to an intake passage during the deceleration fuel cutoff, an evaporated fuel supply amount estimating module for estimating a supply amount of evaporated fuel to the intake passage when the purge is performed, and a catalyst temperature estimating module for estimating a temperature of the exhaust emission control catalyst when the purge is performed, based on the supply amount of the evaporated fuel. The purging unit controls a supply flow rate of the purge gas to the intake passage when the purge is performed, based on the exhaust emission control catalyst temperature.

主权项

1. A control system of an engine in which a purge gas containing evaporated fuel desorbed from a canister is supplied to an intake passage of the engine, the control system comprising:
an exhaust emission control catalyst provided in an exhaust passage of the engine; a deceleration fuel cutoff module for performing a deceleration fuel cutoff to stop a fuel supply from an injector to the engine when a predetermined deceleration fuel cutoff condition is satisfied in a decelerating state of the engine; a purging unit for performing a purge to supply the purge gas to the intake passage of the engine during the deceleration fuel cutoff; an evaporated fuel supply amount estimating module for estimating a supply amount of the evaporated fuel to the intake passage when the purge is performed; and a catalyst temperature estimating module for estimating a temperature of the exhaust emission control catalyst when the purge is performed, based on the estimated supply amount of the evaporated fuel, wherein the purging unit controls a supply flow rate of the purge gas to the intake passage when the purge is performed, based on the estimated temperature of the exhaust emission control catalyst.