Abnormality diagnostic method and abnormality diagnostic device for driving force control system
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United States of America Patent
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Dec 15, 2020
Grant Date -
Jun 20, 2019
app pub date -
May 27, 2016
filing date -
May 27, 2016
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Abstract
An abnormality diagnostic method is provided for a driving force control system in which an automatic transmission is interposed between an engine and a drive wheel, and a target driving force that is transmitted to the drive wheel is calculated based on a driver's output request. The automatic transmission and the engine are controlled based on the target driving force. The abnormality diagnostic method includes calculating a target engine torque based on the target driving force, detecting an actual engine torque of the engine, and detecting an intake temperature of the engine. Upon determining the automatic transmission has been operating normally, abnormality diagnostic method determines an abnormality of the driving force control system exists that is caused by the engine upon determining a difference between the target engine torque and the actual engine torque has exceeded a predetermined threshold value.
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