公开(公告)号：US11821374B2

公开(公告)日：2023-11-21

申请号：US16624356

申请日：2017-06-28

申请人： NISSAN MOTOR CO., LTD.

发明人： Kenji Suzuki ,  Ryouichi Ootaki ,  Yukiyo Yamada ,  Masashi Ono ,  Hiroshi Takada

IPC分类号： F02D15/02 ,  F02D13/02 ,  F02D41/00 ,  F02D41/14

CPC分类号： F02D15/02 ,  F02D13/0234 ,  F02D41/0007 ,  F02D41/1448 ,  F02D2041/001 ,  F02D2200/0406

摘要： An internal-combustion engine includes a variable compression ratio mechanism for changing a mechanical compression ratio, and a variable valve timing mechanism for changing the valve timing of an intake valve. When acceleration is demanded, a target compression ratio is set to a lower compression ratio than the target value in a normal condition, and the valve timing is set to the advance angle side. Since the allowable combustion pressure decreases in a prescribed intermediate compression ratio region, if an actual compression ratio exists in the prescribed intermediate compression ratio region in the course of a compression ratio change accompanying acceleration, the variable compression ratio mechanism restricts the intake pressure by increasing a degree of opening of a wastegate valve or reducing a degree of opening of a throttle valve, for example.

公开(公告)号：US10927772B2

公开(公告)日：2021-02-23

申请号：US16643439

申请日：2017-08-30

申请人： Nissan Motor Co., Ltd.

发明人： Kenji Suzuki ,  Tomoki Itou ,  Yukiyo Yamada

IPC分类号： F02D41/06 ,  F02D15/00 ,  F02D41/16 ,  F02D41/14 ,  F02D41/02

摘要： A control method for an internal combustion engine including a variable compression ratio mechanism which includes: implementing a compression ratio fixing control in which a mechanical compression ratio is fixed to a predetermined low compression ratio, and controlling combustion form in a cylinder to stratified combustion, under engine idling during catalyst warming-up; controlling the combustion form in the cylinder to homogeneous combustion, under an operation state other than the engine idling during the catalyst warming-up; and implementing the compression ratio fixing control and controlling the combustion form in the cylinder to the homogeneous combustion, in response to pressing-down of an accelerator under the engine idling during the catalyst warming-up, and as long as the engine idling during the catalyst warming-up has a possibility to resume in response to release of the accelerator after the pressing-down.