Hiroshi Iwano

Improvement of drive torque response by applying an integrated control algorithm for a diesel engine and CVT

Abstract This research concerns improvement of drive torque response by applying an integrated engine-CVT control algorithm to a vehicle equipped with a diesel engine. In order to obtain faster and smoother drive torque response, it is necessary to consider the dynamics of CVT ratio control, inertia torque generated during CVT ratio changes and the operation limit of engine torque, which is used to compensate for these influences. This paper describes the result of an investigation of these issues and presents the simulation and experimental data obtained.

A study of a torque control algorithm for direct-injection gasoline engines

Abstract A new torque control system was developed for direct injection gasoline engines. The control algorithm was obtained through an analysis of torque behavior under lean combustion with the application of EGR. Tests were conducted in which the openings of both the throttle valve and EGR valve were used as the control parameters, and the fuel injection quantity was synchronized with the phase of the air flow into the cylinders. It was found that good correspondence was obtained between the actual torque and the target torque even when the air–fuel ratio and the EGR rate were changed under transient operating conditions.