公开(公告)号：US10655592B2

公开(公告)日：2020-05-19

申请号：US16013304

申请日：2018-06-20

Applicant: Cummins Inc.

Inventor： Marten H. Dane ,  Richard A. Booth ,  Balaji Sampathnarayanan ,  Jagruti Tembe

IPC: F02P5/00 ,  F02P5/04 ,  F02P5/15 ,  F02P5/145 ,  F02P5/152 ,  F02D41/00

Abstract: A system for controlling one or more conditions associated with combustion events in one or more cylinders of an engine while generally maintaining a spark timing value at a relatively constant value. The system includes a controller configured to determine one or more temporary adjustments to the spark timing value that brings one or more conditions, such as, for example, engine knock levels and/or NOx levels to around, or within, a corresponding target or threshold level(s). Following selection and implementation of one of the adjustments to the spark timing value, the controller implement adjustments to the adjusted spark timing value to return to a target spark timing value. The controller can further be adapted to determine adjustments to the air-to-fuel ratio to accommodate operation of the engine at the target spark timing value while maintaining the one or more conditions at or below the corresponding threshold or target level(s).

公开(公告)号：US20180298870A1

公开(公告)日：2018-10-18

申请号：US16013304

申请日：2018-06-20

Applicant: Cummins Inc.

Inventor： Marten H. Dane ,  Richard A. Booth ,  Balaji Sampathnarayanan ,  Jagruti Tembe

IPC: F02P5/04 ,  F02P5/152

Abstract: A system for controlling one or more conditions associated with combustion events in one or more cylinders of an engine while generally maintaining a spark timing value at a relatively constant value. The system includes a controller configured to determine one or more temporary adjustments to the spark timing value that brings one or more conditions, such as, for example, engine knock levels and/or NOx levels to around, or within, a corresponding target or threshold level(s). Following selection and implementation of one of the adjustments to the spark timing value, the controller implement adjustments to the adjusted spark timing value to return to a target spark timing value. The controller can further be adapted to determine adjustments to the air-to-fuel ratio to accommodate operation of the engine at the target spark timing value while maintaining the one or more conditions at or below the corresponding threshold or target level(s).