IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
UP-0868591
(2007-10-08)
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등록번호 |
US-7607289
(2009-11-10)
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발명자
/ 주소 |
- Schmeichel, Steve D.
- Schmidt, Fred W.
- Imes, Julian A.
- Dushek, Robert Allen
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
7 인용 특허 :
46 |
초록
▼
Methods, constructions, and systems for treating engine emissions. An engine includes a crankcase, an air intake, a blow-by vent, and an exhaust port; the crankcase emits blow-by gases through the blow-by vent, and the engine produces an exhaust stream through the exhaust port. The blow-by gases ar
Methods, constructions, and systems for treating engine emissions. An engine includes a crankcase, an air intake, a blow-by vent, and an exhaust port; the crankcase emits blow-by gases through the blow-by vent, and the engine produces an exhaust stream through the exhaust port. The blow-by gases are directed through a blow-by filter to produce filtered gases. The filtered gases are directed back into the air intake of the engine; and the exhaust stream is treated with at least one of a catalytic converter, a flow through filter, and a diesel particulate filter. Total particulate matter (PM) emissions of a turbo-charged diesel engine having an engine crankcase and an exhaust tailpipe are reducible. The total emissions includes particulate matter emissions from the engine crankcase added to the particulate matter emissions from the exhaust tailpipe. The method includes filtering blow-by gases and directing filtered blow-by gases back into the engine; and treating the exhaust stream with a catalyst; whereby the total emissions are reduced by greater than 25% when compared to the same engine that does not filter blow-by gases nor treat the exhaust stream. Usable systems include: a blow-by filter in gas-flow communication with a blow-by vent of an engine crankcase; a diesel oxidation catalyst arrangement in gas-flow communication with an exhaust port of an engine crankcase, a diesel particulate filter (active or passive), a flow through filter, and combinations thereof.
대표청구항
▼
What is claimed is: 1. A method for retrofitting a diesel engine, the diesel engine drawing intake air through an air intake structure including an air filter for filtering the intake air, the method comprising: (a) installing a blow-by gas treatment device for treating blow-by gas generated by the
What is claimed is: 1. A method for retrofitting a diesel engine, the diesel engine drawing intake air through an air intake structure including an air filter for filtering the intake air, the method comprising: (a) installing a blow-by gas treatment device for treating blow-by gas generated by the diesel engine to reduce blow-by gas emissions, the blow-by gas treatment device being installed in gas-flow communication with a blow-by vent structure of the diesel engine and in further gas-flow communication with the engine air intake structure; and (b) installing an exhaust treatment device for treating exhaust gas generated by the diesel engine to reduce exhaust gas emissions, the exhaust treatment device being installed in gas-flow communication with an engine exhaust port structure of the diesel engine, the exhaust treatment device including a substrate for reducing the exhaust gas emissions, the substrate being catalyzed with a diesel oxidation catalyst to promote the oxidation of hydrocarbons, wherein the blow-by gas treatment device and the exhaust treatment device are configured to provide at least a 25 percent reduction in total engine particulate matter emissions when the blow-by gas treatment device and the exhaust treatment device are used to retrofit a model year 1991-2003 on-highway diesel engine rated to produce from 150-600 horsepower. 2. The method of claim 1, wherein the blow-by gas treatment device and the exhaust treatment device are installed on a model year 1991-2003 on-highway diesel engine rated to produce from 150-600 horsepower so as to retrofit the diesel engine in a manner that satisfies the minimum reductions in emissions required by government regulations governing retrofits of model year 1991-2003 on-highway diesel engines rated to produce from 150-600 horsepower. 3. The method of claim 1, wherein the blow-by gas treatment device has a mass efficiency that exceeds 80 percent. 4. The method of claim 1, wherein the blow-by gas treatment device has a mass efficiency that exceeds 90 percent. 5. The method of claim 1, wherein the blow-by gas is directed to the air intake system at a location downstream of the air filter. 6. The method of claim 1, wherein the substrate includes a ceramic substrate having a honeycomb like configuration of longitudinal channels. 7. The method of claim 1, further comprising selling the blow-by gas treatment device and the exhaust treatment device as part of a retrofit kit. 8. The method of claim 1, wherein the catalyzed substrate comprises a catalytic converter. 9. The method of claim 1, wherein the catalyzed substrate comprises a flow through filter. 10. The method of claim 1, wherein the catalyzed substrate comprises a diesel particulate filter. 11. The method of claim 10, wherein the diesel particulate filter is a wall flow filter. 12. The method of claim 11, wherein the wall flow filter includes a ceramic substrate having a honeycomb like configuration of longitudinal channels, with ends of the channels selectively plugged to encourage flow through walls of the longitudinal channels. 13. A method reducing air emissions from a diesel engine, the diesel engine drawing intake air through an air intake structure including an air filter for filtering the intake air, the method comprising: using a blow-by gas treatment device for treating blow-by gas generated by the diesel engine to reduce blow-by gas emissions, the blow-by gas treatment device being used in gas-flow communication with a blow-by vent structure of the diesel engine and in further gas-flow communication with the engine air intake structure; and using an exhaust treatment device for treating exhaust gas generated by the diesel engine to reduce exhaust gas emissions, the exhaust treatment device being used in gas-flow communication with an engine exhaust port structure of the diesel engine, the exhaust treatment device including a substrate for reducing the exhaust gas emissions, the substrate being catalyzed with a diesel oxidation catalyst to promote the oxidation of hydrocarbons, wherein the blow-by gas treatment device and the exhaust treatment device are configured to provide at least a 25 percent reduction in total engine particulate matter emissions when the blow-by gas treatment device and the exhaust treatment device are used to treat exhaust from a model year 1991-2003 on-highway diesel engine rated to produce from 150-600 horsepower, and wherein at least one of the blow-by gas treatment device and the exhaust treatment device is installed as part of a retrofit operation. 14. The method of claim 13, wherein the blow-by gas treatment device has a mass efficiency that exceeds 80 percent. 15. The method of claim 13, wherein the blow-by gas is directed to the air intake system at a location downstream of the air filter. 16. The method of claim 13, wherein the substrate includes a ceramic substrate having a honeycomb like configuration of longitudinal channels. 17. The method of claim 13, further comprising selling the blow-by gas treatment device and the exhaust treatment device as part of a retrofit kit. 18. The method of claim 13, wherein the catalyzed substrate comprises a catalytic converter. 19. The method of claim 13, wherein the catalyzed substrate comprises a flow through filter. 20. The method of claim 13, wherein the catalyzed substrate comprises a diesel particulate filter.
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