Invention Grant
- Patent Title: Variable displacement engine diagnostics
- Patent Title (中): 可变排量发动机诊断
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Application No.: US12352987Application Date: 2009-01-13
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Publication No.: US07921709B2Publication Date: 2011-04-12
- Inventor: Jeffrey Allen Doering , John Eric Rollinger
- Applicant: Jeffrey Allen Doering , John Eric Rollinger
- Applicant Address: US MI Dearborn
- Assignee: Ford Global Technologies, LLC
- Current Assignee: Ford Global Technologies, LLC
- Current Assignee Address: US MI Dearborn
- Agency: Alleman Hall McCoy Russell & Tuttle LLP
- Agent Allan J. Lippa
- Main IPC: G01M15/00
- IPC: G01M15/00
Abstract:
Methods and systems are provided for monitoring cylinder valve deactivation of a cylinder valve of an engine. One example method comprises, indicating degradation of cylinder valve deactivation in response to manifold pressure at or around a characteristic frequency.
Public/Granted literature
- US20100175463A1 VARIABLE DISPLACEMENT ENGINE DIAGNOSTICS Public/Granted day:2010-07-15
Information query
