Patent ID: 6012435
Filing Date: 2000-01-11
Classification: F02B,F02D,F02M,Y02T

Abstract:
An engine combustion controller for use with an engine wherein fuel supplied by a fuel tank and air aspirated from an intake passage are provided as a fuel-air mixture in a combustion chamber and burnt, said engine comprising a fuel vapor purge mechanism wherein fuel vapor from said fuel tank is first adsorbed by in a canister and then mixed with air in said intake passage, said controller comprising:means for selectively producing said mixture in a specific part of said combustion chamber as a stratified fuel-air mixture, and producing said mixture uniformly in said combustion chamber as a uniform fuel-air mixture,means for prohibiting said fuel vapor purge mechanism from mixing fuel vapor with air in said intake passage when said stratified fuel-air mixture is produced in said combustion chamber,means for computing a fuel vapor adsorption amount in said canister,means for controlling said producing means so as to produce said uniform fuel-air mixture when the fuel vapor adsorption amount exceeds a predetermined value, andmeans for operating said fuel vapor purge mechanism so as to mix fuel vapor with air in said intake passage when the fuel vapor adsorption amount exceeds said predetermined value.