公开(公告)号：US20200232348A1

公开(公告)日：2020-07-23

申请号：US16250591

申请日：2019-01-17

Applicant: GM Global Technology Operations LLC

Inventor： Hong Wai Nguyen ,  Domenic Certo ,  Bradley R. Kaan ,  Joseph J. Moon

IPC: F01L1/047 ,  F01L13/00

Abstract: A camshaft assembly includes an actuator and an axially moveable structure mounted to a base shaft wherein the axially moveable structure includes a plurality of lobe packs and a cam barrel. The axially movable structure moves along the base shaft in the axial direction along a longitudinal axis of the base shaft, but is rotationally fixed to the base shaft. The barrel cam includes an inner wall and an outer wall which defines a control groove therebetween. The control groove further defines first and second regions wherein the first region includes a fixed narrow control groove width and the second region includes a progressively decreasing control groove width. The actuator shifts the axially moveable structure relative to the base shaft between a first position and a second position. A recess is defined in the outer wall such that the recess is disposed adjacent to the first region.

公开(公告)号：US20200072098A1

公开(公告)日：2020-03-05

申请号：US16120744

申请日：2018-09-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Bradley R. Kaan ,  Hong Wai Nguyen ,  Domenic Certo

IPC: F01L13/00 ,  F01L1/047 ,  F02B75/18

Abstract: A camshaft assembly includes a base shaft, an axially movable structure having a barrel cam and a plurality of lobe packs, and an actuator. The barrel cam defines a single control groove having an enlarged region and a converged region. The actuator includes an actuator body with first and second pins. Each of the first and second pins moves relative to the actuator body between a retracted position and an extended position. The axially movable structure may move from a first position to a second position when the second pin rides along at least a portion of a second side of the enlarged region and then enters the converged region. The axially movable structure may also move from a second position to a first position when the first pin rides along at least a portion of a first side of the enlarged region before entering the converged region.