|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||F02D-015/02 B60W-010/06 B60W-010/101 B60W-030/188 F02D-041/26 F02D-041/14|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 0 인용 특허 : 49|
Methods and systems are provided for integrating a VCR engine with a CVT transmission. Responsive to a driver demand, a controller may determine whether to maintain a current compression ratio or transition to an alternate compression ratio based on the fuel economy benefit of the transition and further based on any engine limitations that may be incurred at the engine speed-load following the transition. To improve the net fuel economy benefit while addressing the engine limitation, a compression ratio transition may be combined with a CVT adjusted engi...
1. A method for an engine coupled with a continuously variable transmission (CVT), comprising: for a driver demand, estimating a first fuel economy associated with maintaining a first compression ratio to a second fuel economy associated with transitioning to a second compression ratio while operating with a knock-adjusted and friction-adjusted engine speed-load profile; andin response to the second fuel economy being higher than the first fuel economy, transitioning to the second compression ratio via mechanical adjustments to a piston position and tran...