发明名称 |
Method for mid load operation of auto-ignition combustion |
摘要 |
A method is disclosed for expanding the mid load operation limit in a four-stroke gasoline direct-injection controlled auto-ignition combustion engine. A system is employed for variably actuating the intake and exhaust valves and for operating the valves with an exhaust re-compression or exhaust re-breathing valve strategy. A spark plug is provided. A fuel injector having multiple injection capability is employed. A first fuel charge is injected into the combustion chamber to form a lean air-fuel mixture. A second fuel charge is injected into the combustion chamber to form a stratified air-fuel mixture having an ignitable mixture located near the spark plug. The ignitable mixture is ignited at the spark gap, thereby causing spark-ignition combustion that causes a sufficient increase in chamber pressure and temperature to trigger auto-ignition of the lean air-fuel mixture, resulting in the obtaining of a higher engine load before a pressure rise rate in the combustion chamber exceeds a prescribed threshold value.
|
申请公布号 |
US6994072(B2) |
申请公布日期 |
2006.02.07 |
申请号 |
US20040997661 |
申请日期 |
2004.11.24 |
申请人 |
GENERAL MOTORS CORPORATION |
发明人 |
KUO TANG-WEI;BROWN BARRY L.;ENG JAMES A.;NAJT PAUL M. |
分类号 |
F02B17/00 |
主分类号 |
F02B17/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|