An improvement method for fuel consumption and driving performance of vehicle using improved lean burn condition

摘要

The present invention provides a method of improving fuel economy and driving performance of the vehicle through the improvement of the lean-burn conditions, each step confirmation stage of engine starting; Comparing the reference temperature is set to determine whether the current cooling water temperature entering the lean burn after an engine start is made at the step; Comparing the reference vehicle speed is set in order to determine if the current vehicle speed, if a lean burn approach is based on the current cooling water temperature than in step; Determining whether a change of the current throttle valve opening degree if the current vehicle speed is less than the reference vehicle speed in the phase that exists in the set range; Determining whether the set value or less according to the case within the opening range change is set in the current engine load throttle valve in step height coefficient (fho); When the engine load is less than or equal to set value in the above step according to the high coefficient step of entering the lean burn operation area; And if the current vehicle speed is then entered in the lean phase is greater than the speed set for the running of a continuous lean operation area control steps performed by the children of the dragon lean rpm according to the vehicle but the vehicle has sustained current lean lean-burn operation area after entry is smaller than the vehicle speed set for the running of a characterized in that the control step is carried out in accordance with the vehicle speed to the normal idle rpm.