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公开(公告)号:WO2021249214A1
公开(公告)日:2021-12-16
申请号:PCT/CN2021/096973
申请日:2021-05-28
Applicant: 中国第一汽车股份有限公司
IPC: F02D41/40 , F02D41/38 , F02D2041/389 , F02D2200/021 , F02D2200/04 , F02D2200/501 , F02D29/02 , F02D41/0215 , F02D41/0235 , F02D41/402
Abstract: 一种直喷发动机燃料喷射的控制方法,其包括如下步骤:S1、控制系统检测发动机是否满足喷油条件,在发动机满足喷油条件的情况下,继续进行喷油,在发动机不满足喷油条件的情况下,停止喷油;S2、控制系统计算发动机在当前工作状态中所需要的喷油量;S3、控制系统判断是否将喷油量分大于两次喷射,响应于需要进行大于两次喷射的判断结果,执行S4;响应于不需要进行大于两次喷射的判断结果,执行S5;S4、控制系统确定喷油次数、喷油脉宽和喷油角度,并下发喷油指令;S5、控制系统确定喷油脉宽和喷油角度,并下发喷油指令。
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公开(公告)号:WO2021262277A1
公开(公告)日:2021-12-30
申请号:PCT/US2021/025369
申请日:2021-04-01
Applicant: TULA TECHNOLOGY INC. , CUMMINS INC.
Inventor: PHILLIPS, Andrew W. , FUSCHETTO, Jerry F.
IPC: F02D41/00 , F02D41/38 , F02D17/02 , F02D13/06 , F02D13/0242 , F02D2041/389 , F02D41/0087 , F02D41/009 , F02D41/401 , F02D41/402
Abstract: A skip fire engine controller is disclosed that commands an early direct-injection of fuel during a skipped working cycle in which a cylinder is not exhausted. With early direct injection, the fuel has more time to vaporize and mix with air for combustion in an immediately following working cycle in which the cylinder is fired. By increasing the degree of vaporization and mixing, the combustion is both cleaner and more efficient.
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