Patent ID: 7520263
Filing Date: 2009-04-21
Classification: F02D

Abstract:
1. An engine torque control method, comprising: analyzing a TPS signal in an engine start-up state and determining whether or not a variation in a load occurs; when a driving condition converts from an idle state to a part load state, linearly setting a first transient period and a torque restriction cancellation value, and linearly canceling the torque restriction amount in the first transient period; setting a first engine RPM weight value based on a target engine RPM, and setting a first alternator load weight value; applying the torque restriction cancellation value set in the setting of the torque restriction cancellation value, and the first engine RPM weight value and the first alternator load weight value set in the setting of the first engine RPM weight value and the first alternator load weight value, and determining a first final engine torque so as to control an air amount of an ISA and an ignition timing; if it is determined in the analyzing of the TPS signal that a driving condition converts from the part load state to the idle state, linearly setting a second transient period and a torque restriction amount, and linearly performing torque restriction in the second transient period; setting a second engine RPM weight value based on the target engine RPM, and setting a second alternator load weight value; and applying the torque restriction amount set in the setting of the torque restriction amount, and the second engine RPM weight value and the second alternator load weight value set in the setting of the second engine RPM weight value and the second alternator load weight value, and determining a second final engine torque so as to control the air amount of the ISA and the ignition timing.