Automotive transmission control system and method
First Claim
1. A transmission control system comprising a controller operable to determine a simulated transmission fluid temperature value and diagnose the state of health of a transmission fluid temperature sensor, said controller being sufficiently configured and programmed to implement a control loop for performing the following operations:
- calculating a synthetic transmission fluid temperature value;
determining and outputting a simulated transmission fluid temperature value;
enabling diagnostic testing of a transmission fluid temperature sensor;
determining the accuracy of a measured transmission fluid temperature value via a pass/fail algorithm and reporting one of a pass condition and a fail condition; and
generating a default transmission fluid temperature value if said pass/fail algorithm reports said fail condition.
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Abstract
The present invention is a control system and method for the determination of a simulated transmission fluid temperature value using multiple linear regression. The present invention also provides a control system and method to diagnose the health of the transmission fluid temperature sensor and provides a default transmission fluid temperature value should failure of the transmission fluid temperature sensor occur.
8 Citations
8 Claims
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1. A transmission control system comprising a controller operable to determine a simulated transmission fluid temperature value and diagnose the state of health of a transmission fluid temperature sensor, said controller being sufficiently configured and programmed to implement a control loop for performing the following operations:
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calculating a synthetic transmission fluid temperature value; determining and outputting a simulated transmission fluid temperature value; enabling diagnostic testing of a transmission fluid temperature sensor; determining the accuracy of a measured transmission fluid temperature value via a pass/fail algorithm and reporting one of a pass condition and a fail condition; and generating a default transmission fluid temperature value if said pass/fail algorithm reports said fail condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification