Invention Grant
- Patent Title: Valve and fueling strategy for operating a controlled auto-ignition four-stroke internal combustion engine
- Patent Title (中): 用于操作受控自动点火四冲程内燃机的阀和加油策略
-
Application No.: US10899456Application Date: 2004-07-26
-
Publication No.: US07021277B2Publication Date: 2006-04-04
- Inventor: Tang-Wei Kuo , Barry L. Brown , Paul M. Najt , James A. Eng
- Applicant: Tang-Wei Kuo , Barry L. Brown , Paul M. Najt , James A. Eng
- Applicant Address: US MI Detroit
- Assignee: General Motors Corporation
- Current Assignee: General Motors Corporation
- Current Assignee Address: US MI Detroit
- Agent Kathryn A. Marra
- Main IPC: F02B3/04
- IPC: F02B3/04 ; F02M25/07

Abstract:
Part load operating point for a controlled auto-ignition four-stroke internal combustion engine is reduced without compromising combustion stability through load dependent valve controls and fueling strategies. Optimal fuel economy is achieved by employing negative valve overlap to trap and re-compress combusted gases below a predetermined engine load and employing exhaust gas re-breathing above the predetermined engine load. Split-injection fuel controls are implemented during low and intermediate part load operation whereas a single-injection fuel control is implemented during high part load operation. Split-injections are characterized by lean fuel/air ratios and single-injections are characterized by either lean or stoichiometric fuel/air ratios. Controlled autoignition is thereby enabled through an extended range of engine loads while maintaining acceptable combustion stability and emissions at optimal fuel economy.
Public/Granted literature
Information query