发明名称 |
System and method for reducing NOx emissions during transient conditions in a diesel fueled vehicle |
摘要 |
The present invention is a dual-stage fuel injection strategy for compression ignition engines in which 15-40% of the fuel is injected into the combustion chamber no later than about -20 to -30 CA ATDC and as early as IVC. The rest of the fuel is then injected in one or more fuel pulses, none of which start before about -20 to -30 CA ATDC. The fuel injected early in the compression stroke forms a lean mixture that burns with low soot and low NOx emissions. The combustion of that fuel serves to increase in-cylinder temperature such that the ignition delay of subsequent fuel injection pulses is short. This mode is utilized when it is predicted that a NOx spike is imminent. Various other alternative methods for reducing NOx spikes are also disclosed such as specialized EGR systems that can provide EGR with low manifold vacuum. |
申请公布号 |
US6863058(B2) |
申请公布日期 |
2005.03.08 |
申请号 |
US20030248633 |
申请日期 |
2003.02.03 |
申请人 |
FORD GLOBAL TECHNOLOGIES, LLC |
发明人 |
KURTZ ERIC MATTHEW;HAN ZHIYU;BAKER RICHARD EUGENE |
分类号 |
F02B1/12;F02D41/02;F02D41/40;F02M25/07;(IPC1-7):F02D41/30;F02B3/00 |
主分类号 |
F02B1/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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