Hydrocarbon retaining and purging system for flex-fuel combustion engine
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01N-003/00
F01N-003/02
F02M-025/06
F02D-041/00
F01N-005/02
F02M-025/08
F02B-023/10
F02B-075/12
F02D-013/02
F02D-041/06
F02D-019/08
출원번호
US-0901464
(2013-05-23)
등록번호
US-8915070
(2014-12-23)
발명자
/ 주소
Uhrich, Michael James
Elwart, Shane
Kerns, James Michael
Lupescu, Jason Aaron
출원인 / 주소
Ford Global Technologies, LLC
대리인 / 주소
Voutyras, Julia
인용정보
피인용 횟수 :
0인용 특허 :
43
초록▼
Systems, methods, and computer readable storage media are described in which exhaust gas is routed to a hydrocarbon retaining device during starting, and purged to the engine intake manifold. Various alternative approaches are described for controlling operation and diagnosing degradation. Further,
Systems, methods, and computer readable storage media are described in which exhaust gas is routed to a hydrocarbon retaining device during starting, and purged to the engine intake manifold. Various alternative approaches are described for controlling operation and diagnosing degradation. Further, various interrelated configurations are described.
대표청구항▼
1. An engine method, comprising: selectively routing exhaust gases through a hydrocarbon trap to store exhaust hydrocarbons;initiating purging stored hydrocarbons from the hydrocarbon trap, through a purge canister, and then to an engine intake responsive to an alcohol content of injected fuel; andv
1. An engine method, comprising: selectively routing exhaust gases through a hydrocarbon trap to store exhaust hydrocarbons;initiating purging stored hydrocarbons from the hydrocarbon trap, through a purge canister, and then to an engine intake responsive to an alcohol content of injected fuel; andvarying termination of the selective routing responsive to the alcohol content of the injected fuel by delaying the termination as the alcohol content increases. 2. The method of claim 1, where the initiation of the purging is further responsive to an amount of stored hydrocarbons. 3. The method of claim 1, where the initiation of the purging is further responsive to exhaust temperature. 4. The method of claim 1, where the fuel is injected via a direct injector into an engine cylinder. 5. The method of claim 1, wherein during the selective routing, exhaust gas enters via an inlet and flows in a first direction; and where during the purging, purge gases enter via an outlet and flow in a second, opposite direction to the first direction. 6. The method of claim 1, further comprising determining degradation of the hydrocarbon trap responsive to an exhaust air-fuel ratio sensor during the purging. 7. The method of claim 1, where the selective routing is performed during an engine start. 8. The method of claim 7, wherein the purge canister communicates with a fuel tank to retain at least some fuel vapors from the tank. 9. The method of claim 7, further comprising adjusting fuel injection to the engine based on the purging to learn an amount of stored hydrocarbons. 10. The method of claim 7, wherein varying termination includes varying an ending of the selective routing to store exhaust hydrocarbons at a higher temperature as the alcohol content increases. 11. The method of claim 7, further comprising combusting a rich exhaust air-fuel ratio during at least a portion of the selective routing, even when a temperature of an emission control device is below a light-off temperature, and further operating with an exhaust air-fuel ratio about stoichiometry after an ending of the selective routing to store exhaust hydrocarbons. 12. The method of claim 7, further comprising transferring exhaust gas heat from the exhaust gas to fresh purge air. 13. A method, comprising: selectively routing engine exhaust gases through a hydrocarbon trap to store exhaust hydrocarbons;adjusting an initiation of purging stored hydrocarbons from the hydrocarbon trap, through a purge canister, and then to an engine intake to higher temperatures as an alcohol content of injected fuel increases; anddelaying termination of the selective routing as the alcohol content increases. 14. The method of claim 13, wherein the fuel is injected via a direct fuel injector coupled to an engine cylinder. 15. The method of claim 13, where the selective routing is performed during an engine start. 16. The method of claim 15, wherein the purge canister communicates with a fuel tank to retain at least some fuel vapors from the tank. 17. A method, comprising: selectively routing engine exhaust gases through first and second hydrocarbon traps to store exhaust hydrocarbons;initiating purging stored hydrocarbons from the hydrocarbon traps, through a purge canister, and then to an engine intake based on an alcohol content of injected fuel; anddelaying termination of the selective routing as the alcohol content increases. 18. The method of claim 17, wherein the initiating purging stored hydrocarbons is adjusted to higher temperatures as the alcohol content of injected fuel increases.
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이 특허에 인용된 특허 (43)
Watanabe Takashi,JPX ; Hoshi Koichi,JPX, Apparatus and method for determining amount of unburned fuel component adsorbed by an adsorbent in an internal combustion engine.
Adamczyk ; Jr. Andrew A. (Dearborn MI) Hurley Ronald G. (Shenfield MI GB3) Pakko James D. (Dearborn MI) Hansen Lisa A. (Dearborn MI) Lyon Peter M. (Birmingham MI), Automotive engine exhaust aftertreatment system including hydrocarbon adsorber with internal engine purge flow control.
Patil Mallanagouda D. (Corning NY) Socha ; Jr. Louis S. (Painted Post NY) Lachman Irwin M. (Corning NY), Dual converter engine exhaust system for reducing hydrocarbon emissions.
Uhrich, Michael James; Elwart, Shane; Kerns, James Michael; Lupescu, Jason Aaron, Engine starting control for engine with hydrocarbon retaining system.
Minami Takashi (Toyota JPX) Nagase Toshimi (Toyota JPX), Exhaust gas purification device in variable combination of absorbent and catalyst according to gas temperature.
Gandhi, Harendra S.; Uhrich, Michael James; Elwart, Shane; Kerns, James Michael; Lupescu, Jason Aaron, Hydrocarbon retaining system for flex-fuel combustion engine.
Christensen Louis R. (Canton MI) Gladd Matthew J. (Dearborn MI) Gandhi Harendra S. (Farmington MI) Sweetnam Gordon W. (Milford MI), Method and apparatus for oxidizing hydrocarbons from exhaust gases.
Plapp Gnther (Filderstadt DEX) Entenmann Robert (Benningen DEX) Kratt Alfred (Schwieberdingden DEX), Method and arrangement for checking the operability of a fluid-flow conducting conduit system of an internal combustion.
Adamczyk ; Jr. Andrew A. (Dearborn MI) Hepburn Jeffrey S. (Dearborn MI), Methods and apparatus for monitoring the performance of hydrocarbon engine emission trapping devices.
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