| 摘要 |
A method and system to improve fuel economy of an engine on a vehicle is offered. An electronic throttle control device is commanded to a wide open throttle position during vehicle coast down, thus improving engine breathing and reducing pumping losses, and improving engine efficiency. This includes monitoring operator inputs to: an accelerator device, a braking device, and a cruise control device, and, monitoring throttle position control input from the electronic controller to the electronically controlled throttle mechanism. The electronically controlled throttle mechanism is commanded to a substantially wide-open throttle condition only when the monitored operator inputs to the accelerator device, the braking device, and the cruise control device are each at a null position. A further limitation on the wide-open throttle command includes monitoring other inputs from the electronic controller to the throttle mechanism.
|
