Patent ID: 8874331
Filing Date: 2014-10-28
Classification: F02D,Y02T

Abstract:
1. An idle throttle variation unit for an automobile comprising: an engine having an engine output speed; an engine sensor configured to measure the engine output speed and to generate engine output speed data corresponding to the measured engine output speed; a torque converter coupled to the engine; a transmission coupled to the torque converter and having a transmission input speed; a transmission sensor configured to measure the transmission input speed and to generate transmission input speed data corresponding to the transmission input speed; a throttle coupled to the engine and configured to output an airflow to the engine during a current idle operation of the engine; a memory configured to store throttle airflow compensation values for torque converter loads corresponding to torque converter speed ratio values for an idle operation of the engine; and an engine control unit coupled to at least the engine sensor, the transmission sensor, and the memory, the engine control unit configured to: