Patent ID: 7426433

Claim:
A method for controlling exhaust gas temperature of a combustion engine with at least one accessory to produce maximum power without causing damage to the combustion engine, comprising the steps of: a. setting a predefined high exhaust temperature that is just below a temperature that damages the combustion engine; b. setting a predefined low exhaust temperature that is just above a normal combustion engine operating temperature; c. operating the combustion engine and using at least one sensor to measure at least one exhaust gas temperature from the combustion engine forming at least one measured temperature; d. using a processor to receive the at least one measured temperature; e. using computer instructions in data storage in communication with the processor to instruct the processor to perform the steps comprising: i. comparing the at least one measured temperature to the predefined high exhaust temperature and the predefined low exhaust temperature; ii. determining a change between a first measured temperature and a second measured temperature over a small defined time interval; iii. multiplying the change by a factor that coincides with an internal lag time of the at least one sensor to provide a forecasted exhaust gas temperature in real time on a continuous basis; iv. controlling voltage from a power source to the at least one accessory to reduce the exhaust gas temperature when the forecasted exhaust gas temperature reaches or exceeds the predefined high exhaust temperature; and v. controlling voltage from the power source to the at least one accessory to increase the exhaust gas temperature when the forecasted exhaust gas temperature reaches the predefined low exhaust temperature.