Invention Grant
- Patent Title: Methods and systems to identify cam phaser hardware degradation
- Patent Title (中): 识别凸轮移相器硬件退化的方法和系统
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Application No.: US11747515Application Date: 2007-05-11
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Publication No.: US07918130B2Publication Date: 2011-04-05
- Inventor: Jerry W. Kortge
- Applicant: Jerry W. Kortge
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Main IPC: G01M13/02
- IPC: G01M13/02
Abstract:
A cam phaser diagnostic system is provided. The system includes: a first sample variance module that computes a first variance based on a desired cam phaser position. A second sample variance module computes a second variance based on a measured cam phaser position. An evaluation module diagnoses faulty cam phaser operation based on the first variance and the second variance.
Public/Granted literature
- US20080281453A1 METHODS AND SYSTEMS TO IDENTIFY CAM PHASER HARDWARE DEGRADATION Public/Granted day:2008-11-13
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