Patent ID: 6024069
Filing Date: 2000-02-15
Classification: F02B,F02D,Y02T

Abstract:
A controller for an internal combustion engine having a cylinder and an injector to inject fuel directly into the cylinder, the controller comprising:a discriminating section to detect a change of combustion in the cylinder from stratified combustion to homogeneous combustion;a homogeneous transient condition discriminating section to detect a transient condition of operation with homogeneous combustion just after a change is made from operation with stratified combustion to operation with homogeneous combustion;a homogeneous steady-state condition discriminating section to detect steady-state homogeneous combustion;a section to calculate a ratio between air and fuel for the cylinder; anda limiter to limit the ratio between air and fuel in a range such that a minimum amount of fuel relative to an amount of air is increased when operating in said transient condition of operation with homogeneous combustion just after a change is made from operation with stratified combustion to operation with homogeneous combustion compared with the ratio between air and fuel during steady-state homogeneous combustion.