发明名称 |
METHOD AND SYSTEM FOR IMPROVED DILUTION PURGING |
摘要 |
Methods and systems are provided for expediting EGR purging in a hybrid vehicle during transient operations, such as tip-out to lower load conditions. In response to decreasing engine torque demand, engine fueling is disabled and a motor is used to spin the engine unfueled until a desired LP-EGR rate is achieved. Alternatively, engine operation is maintained with EGR disabled until the desired LP-EGR rate is achieved, and the excess engine torque generated is stored in a system battery. |
申请公布号 |
US2015136074(A1) |
申请公布日期 |
2015.05.21 |
申请号 |
US201314085696 |
申请日期 |
2013.11.20 |
申请人 |
Ford Global Technologies, LLC |
发明人 |
Styles Daniel Joseph;Hilditch James Alfred;Bower Stanley Larue;Surnilla Gopichandra |
分类号 |
F02D41/00 |
主分类号 |
F02D41/00 |
代理机构 |
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代理人 |
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主权项 |
1. A method for a hybrid vehicle system, comprising:
in response to decreasing engine torque demand while operating an engine with EGR, disabling EGR; and until EGR in an engine intake is less than a threshold,
operating an engine with EGR disabled and with engine output torque higher than demanded torque; andcharging a system battery. |
地址 |
Dearborn MI US |