公开(公告)号：US10156162B2

公开(公告)日：2018-12-18

申请号：US15145069

申请日：2016-05-03

Applicant: Cummins Inc.

Inventor： Thomas Robert Marsh ,  Vaibhav J. Lawand ,  Brendan J. O'Grady

IPC: F01L1/34 ,  F01L1/08 ,  F02M26/04 ,  F02B25/14 ,  F01L1/053 ,  F01L1/18 ,  F01L13/00

Abstract: Systems, apparatus, and methods are disclosed that include an internal combustion engine having a plurality of cylinders and at least one camshaft for opening at least one valve associated with the at least one cylinder. The camshaft includes a cam with a cam lobe defining a cam lobe profile having a base circle portion on a base circle of the cam lobe, a main cam lobe portion, and a low lift dwell portion that extends a constant height from the base circle along a substantial portion of the base circle to increase valve opening overlap and cylinder scavenging.

公开(公告)号：US20170321573A1

公开(公告)日：2017-11-09

申请号：US15145069

申请日：2016-05-03

Applicant: Cummins Inc.

Inventor： Thomas Robert Marsh ,  Vaibhav J. Lawand ,  Brendan J. O'Grady

IPC: F01L1/08 ,  F01L1/047 ,  F02M26/04

CPC classification number: F01L1/08 ,  F01L1/053 ,  F01L1/185 ,  F01L13/0005 ,  F01L13/0015 ,  F01L2001/0537 ,  F01L2201/00 ,  F01L2800/10 ,  F02B25/145 ,  F02M26/04

Abstract: Systems, apparatus, and methods are disclosed that include an internal combustion engine having a plurality of cylinders and at least one camshaft for opening at least one valve associated with the at least one cylinder. The camshaft includes a cam with a cam lobe defining a cam lobe profile having a base circle portion on a base circle of the cam lobe, a main cam lobe portion, and a low lift dwell portion that extends a constant height from the base circle along a substantial portion of the base circle to increase valve opening overlap and cylinder scavenging.