公开(公告)号：US20190316496A1

公开(公告)日：2019-10-17

申请号：US15952578

申请日：2018-04-13

Applicant: Caterpillar Inc.

Inventor： Yanchai ZHANG ,  Zhaoxu DONG ,  Arun RAJENDRAN ,  Yifeng LU ,  Xuefei HU ,  Lidi CHEN ,  Rodney D. HARMS

IPC: F01L1/24 ,  F02D41/00 ,  G07C5/08 ,  G07C5/00 ,  F02D41/24

Abstract: Some examples described herein may involve determining an advance timing window between the valve opening or closing and a designated time that the valve is scheduled to open or close; determining a closing velocity of the valve; monitoring an engine speed of the engine; determining valve lash information based on the advance timing window, the closing velocity, and the engine speed, wherein the valve lash information identifies a magnitude of the valve lash or whether the magnitude of the valve lash associated with the valve satisfies a threshold; and performing an action based on the valve lash information.