Patent ID: 9022011
Filing Date: 2015-05-05
Classification: F02D,F02M,F02P

Abstract:
1. A method of operating an engine, comprising: (a) determining a peak power condition for the engine by altering an air-fuel mixture ratio delivered to the engine and monitoring a change in an engine parameter that occurs as a result of the altered air-fuel mixture ratio until said monitored engine parameter indicates the peak power condition of the engine at that time; (b) measuring a temperature associated with the engine at said peak power condition; (c) comparing the temperature measured in step (b) with a previously determined temperature associated with a known peak power condition of the engine; (d) determining an offset value based on the comparison made in step (c); and (e) controlling at least one of an air-fuel mixture delivered to the engine or ignition spark timing relative to top dead center of a piston of the engine based on said offset value.