| 发明名称 |
Diagnostic system and method for a variable valve lift mechanism |
| 摘要 |
A system according to the principles of the present disclosure includes a timing control module and a diagnostic module. The timing control module controls engine valve timing by sending fluid to an advancing chamber of a cam phaser to adjust the cam phaser to an advanced position and by sending fluid to a retarding chamber of the cam phaser to adjust the cam phaser to a retarded position. The diagnostic module identifies a fault in a variable valve lift (VVL) mechanism based on a first difference between an advancing pressure of the advancing chamber and a retarding pressure of the retarding chamber. |
| 申请公布号 |
US9080516(B2) |
申请公布日期 |
2015.07.14 |
| 申请号 |
US201113237441 |
申请日期 |
2011.09.20 |
| 申请人 |
GM Global Technology Operations LLC |
发明人 |
Zheng Liyun;Bagnasco Andrew P.;York Gregory J. |
| 分类号 |
F02D13/02;F02D28/00;F01L1/344 |
主分类号 |
F02D13/02 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A system, comprising:
a timing control module that controls engine valve timing by sending fluid to an advancing chamber of a cam phaser to adjust the cam phaser to an advanced position and by sending fluid to a retarding chamber of the cam phaser to adjust the cam phaser to a retarded position; and a diagnostic module that identifies a fault in a variable valve lift (VVL) mechanism based on a first difference between an advancing pressure of the advancing chamber and a retarding pressure of the retarding chamber. |
| 地址 |
Detroit MI US |
