Invention Grant
- Patent Title: Method and apparatus to operate a homogeneous charge compression-ignition engine
- Patent Title (中): 操作均质充气压缩点火发动机的方法和装置
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Application No.: US11398776Application Date: 2006-04-06
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Publication No.: US07246597B2Publication Date: 2007-07-24
- Inventor: Tang-Wei Kuo , Paul M. Najt , James A. Eng , Rodney B. Rask
- Applicant: Tang-Wei Kuo , Paul M. Najt , James A. Eng , Rodney B. Rask
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations, Inc.
- Current Assignee: GM Global Technology Operations, Inc.
- Current Assignee Address: US MI Detroit
- Main IPC: F02B9/04
- IPC: F02B9/04

Abstract:
A method and apparatus for controlling engine operation to compensate for effects of combustion chamber deposits (CCDs) on combustion in a controlled auto-ignition engine is presented. Control methodologies comprise operation of variable valve actuation, fuel injection, spark timing, and intake air and coolant temperature to dynamically compensate for the effect of CCDs. A sensitivity to core gas temperature and chamber wall thermal conditions is shown, which is correlatable to in-cylinder CCD formation. Intake charge or coolant temperature control can be used to compensate for CCD effects. An engine control scheme relies upon a parametric input that quantifies instantaneous CCD formation in the combustion chamber. The result is further applicable to control pre-ignition in a conventional spark-ignition engine.
Public/Granted literature
- US20070107692A1 Method and apparatus to operate a homogeneous charge compression-ignition engine Public/Granted day:2007-05-17
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