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특허 상세정보

Method and system for engine control

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B60W-020/40    B60W-020/17    B60W-010/06    B60W-010/08    B60K-006/24    B60K-006/26    B60K-006/365    B60K-006/48    F02D-015/04   
출원번호 US-0146687 (2016-05-04)
등록번호 US-9944276 (2018-04-17)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Kelley, David
인용정보 피인용 횟수 : 0  인용 특허 : 49
초록

Methods and systems are provided for synergizing the benefits of a variable compression ratio engine in a hybrid vehicle system. A vehicle controller may hold the engine in a lower compression ratio during engine pull-ups and pull-downs, in particular when passing through a low speed region where compression bobbles can occur. During engine operation, in response to a change in driver demand, the controller may opt to switch the compression ratio or maintain a current compression ratio while smoothing a torque deficit using motor torque, the selection ba...

대표
청구항

1. A method for a hybrid vehicle, comprising: shifting between propelling the vehicle via only motor torque and propelling the vehicle via only engine torque or via engine torque and motor torque responsive to driver demand; andduring the shifting, and responsive to engine speed at or below a threshold speed, transitioning an engine to a lower compression ratio. 2. The method of claim 1, wherein the shifting includes, responsive to a decrease in driver demand, shifting from propelling the vehicle via engine torque to propelling via only motor torque duri...

이 특허에 인용된 특허 (49)

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