公开(公告)号：WO2019125355A1

公开(公告)日：2019-06-27

申请号：PCT/US2017/066953

申请日：2017-12-18

Applicant: CUMMINS INC.

Inventor： PERFETTO, Anthony, Kyle ,  SHAMBHAV, Anshul ,  CECIL, Adam, C. ,  SCHULTZ, Ryan, Edward

IPC: F02D13/04 ,  F01L13/06 ,  F02D13/06 ,  F02D41/12 ,  F02M59/36

Abstract: An internal combustion engine system includes an engine with a plurality of pistons housed in respective ones of a plurality of cylinders, an air intake system to provide air to the plurality of cylinders through respective ones of a plurality of intake valves, an exhaust system to release exhaust gas from the plurality of cylinders through respective one of a plurality of exhaust valves. A valve train is provided for cylinder deactivation of a first part of the plurality of cylinders and compression release braking on a second part of the plurality of cylinders.

公开(公告)号：WO2019060131A1

公开(公告)日：2019-03-28

申请号：PCT/US2018/049370

申请日：2018-09-04

Applicant: CUMMINS INC.

Inventor： CECIL, Adam, C. ,  SHAMBHAV, Anshul ,  PERFETTO, Anthony, Kyle

IPC: F01L13/06

Abstract: A system includes an engine with a plurality of pistons housed in respective ones of a plurality of cylinders, an air intake system provides air to the plurality of cylinders through respective ones of a plurality of intake valves, an exhaust system to release exhaust gas from the plurality of cylinders through one of a plurality of exhaust valves, and a controller coupled to a sensor to control a switching tappet for compression release braking. Alternatively to a tappet, the system includes a roller finger follower controlling an opening and closing timing of exhaust valves, the roller finger follower has an inner roller follower arm adjacent an outer sliding follower, and a controller that in response to an engine braking request locks the inner roller follower arm with the outer sliding follower to contact a second cam lobe and open the exhaust valve during a compression stroke of the cylinder.