Patent ID: 6443120
Filing Date: 2002-09-03
Classification: F02B,F02D,Y02T

Abstract:
A controlling apparatus of an engine that generates torque by combusting air fuel mixture in a combustion chamber, wherein the engine operates in a combustion mode selected from a homogeneous stoichiometric combustion mode and a stratified lean combustion mode, the homogeneous stoichiometric combustion mode including a first homogeneous mode and a second homogeneous mode, wherein, when the engine operates in one of the first and second homogeneous modes, EGR control, in which some of exhaust gas is recirculated to the combustion chamber, is performed, and wherein, when the engine operates in the other of the first and second homogeneous modes, EGR control is not performed, the apparatus comprising:computing means, wherein the computing means computes a torque reflecting value based on the running state of the engine, the torque reflecting value reflecting an engine torque demanded when the engine operates in the first homogeneous mode; intake air control means, wherein, when the engine operates in the homogeneous stoichiometric combustion mode, the intake air control means controls the amount of intake air drawn into the combustion chamber thereby adjusting the engine torque, wherein, when the engine operates in the first homogeneous mode, the intake air control means controls the intake air amount based on the torque reflecting value, and wherein, when the engine operates in the second homogeneous mode, the intake air control means modifies the torque reflecting value for compensating for the difference of the engine torque between the first and second homogeneous modes due to whether EGR control is performed, and wherein the intake air control means controls the intake air amount based on the modified torque reflecting value; and fuel control means, wherein, when the engine operates in the stratified lean combustion mode, the fuel control means controls the amount of fuel supplied to the combustion chamber based on the torque reflecting value thereby adjusting the engine torque.