SYSTEM AND METHOD FOR ENGINE IDLE STOP CONTROL

摘要

A system and method for controlling engine idle stop in a hybrid vehicle balance the extra electrical load imposed on the vehicle during engine stop with the electrical energy saved to achieve net fuel savings. Predictive information is used to determine potential vehicle stops and corresponding stop durations during a time window. To achieve net fuel savings, the engine stop duration time must be long enough for the electrical energy savings to cover electrical load added to the system. If the predicted stop duration time is long enough to yield net fuel savings, engine stop may be initiated. If not, engine stop may be inhibited.

主权项

1. A hybrid vehicle, comprising:
an engine; a starter motor configured to start the engine; and a controller configured to inhibit engine stop during a vehicle stop event in response to a predicted vehicle stop duration time being below a minimum engine stop time, wherein the minimum engine stop time is based on electrical load of components started in response to the engine stop and electrical load of the starter motor to restart the engine.