Exhaust system comprising catalysed soot filter
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0280932
(2007-02-13)
|
등록번호 |
US-8327632
(2012-12-11)
|
우선권정보 |
GB-0603898.8 (2006-02-28) |
국제출원번호 |
PCT/GB2007/050059
(2007-02-13)
|
§371/§102 date |
20080827
(20080827)
|
국제공개번호 |
WO2007/099363
(2007-09-07)
|
발명자
/ 주소 |
- Phillips, Paul Richard
- Twigg, Martyn Vincent
|
출원인 / 주소 |
- Johnson Matthey Public Limited Company
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
10 |
초록
▼
An exhaust system which has a catalysed soot filter (CSF), a control unit, and a catalyzed sensor. The exhaust system, controllable by the control unit, can increase hydrocarbon (HC) and/or carbon monoxide (CO) content in an exhaust gas flowing into the CSF resulting in combustion of the HC and/or C
An exhaust system which has a catalysed soot filter (CSF), a control unit, and a catalyzed sensor. The exhaust system, controllable by the control unit, can increase hydrocarbon (HC) and/or carbon monoxide (CO) content in an exhaust gas flowing into the CSF resulting in combustion of the HC and/or CO in the CSF, a temperature increase of the CSF, and combustion of particulate matter collected on the CSF. The catalyzed sensor is disposed between an engine manifold and the CSF, and combusts CO and/or HC in the exhaust gas and inputs the control unit with a datum correlating with an enthalpy of combustion of HC and/or CO in the exhaust gas, thereby controlling the content of the combustible HC and/or CO in the exhaust gas flowing into the CSF. The catalysed sensor is the only catalysed component in the exhaust system disposed between the engine and the CSF.
대표청구항
▼
1. An exhaust system for a lean burn internal combustion engine comprising: (a) a catalysed soot filter (CSF), comprising a catalyst;(b) a control unit;(c) means, controllable by the control unit, for increasing a content of combustible hydrocarbon (HC) and/or carbon monoxide (CO) in an exhaust gas
1. An exhaust system for a lean burn internal combustion engine comprising: (a) a catalysed soot filter (CSF), comprising a catalyst;(b) a control unit;(c) means, controllable by the control unit, for increasing a content of combustible hydrocarbon (HC) and/or carbon monoxide (CO) in an exhaust gas flowing into the CSF thereby to combust the HC and/or CO in the CSF, to increase the temperature of the CSF and to combust particulate matter collected thereon; and(d) catalysed sensor means disposed between an engine manifold and the CSF for combusting CO and/or HC in exhaust gas flowing in the exhaust system and inputting the control unit with a datum correlating with an enthalpy of combustion of HC and/or CO in the exhaust gas, wherein the catalysed sensor means is the only catalysed component in the exhaust system disposed between the engine manifold and the CSF,whereby the control unit, when in use, controls the combustible HC and/or CO introducing means in response to the datum input thereby to control the content of the combustible HC and/or CO in the exhaust gas flowing into the CSF. 2. An exhaust system according to claim 1, wherein the catalysed sensor means comprises a catalysed thermocouple junction. 3. An exhaust system according to claim 2, wherein the catalysed sensor means comprises the catalysed thermocouple junction and an uncatalysed reference thermocouple junction. 4. An exhaust system according to claim 1, wherein the catalyst in the CSF comprises at least one platinum group metal. 5. An exhaust system according to claim 3, wherein the catalysed thermocouple junction comprises the same catalyst as the CSF. 6. An exhaust system according to claim 1, wherein the control unit is adapted to prevent the temperature of the CSF from exceeding a pre-determined temperature during active regeneration of the CSF. 7. An exhaust system according to claim 1, wherein the control unit is adapted to maintain the CSF at above a pre-determined temperature during active regeneration of the CSF. 8. An exhaust system according claim 1, wherein the means for increasing the content of the combustible HC and/or CO comprises means for injecting combustible HC into the exhaust gas upstream of the CSF. 9. An apparatus comprising an internal combustion engine and an exhaust system according to claim 1. 10. An apparatus according to claim 9, wherein the means for increasing the content of combustible HC and/or CO in the exhaust gas comprises a fuel injector in a cylinder of the engine. 11. An exhaust system according to claim 1, wherein the catalyst in the CSF comprises platinum. 12. An exhaust system according to claim 1, wherein the catalyst in the CSF comprises platinum and palladium. 13. A method of controlling active regeneration of a catalysed soot filter (CSF), comprising a catalyst, in an exhaust system of an internal combustion engine, which method comprising the steps of: (i) increasing a content of combustible hydrocarbon (HC) and/or carbon monoxide (CO) in an exhaust gas flowing into the CSF thereby to combust the HC and/or CO in the CSF, to increase the temperature of the CSF and to combust particulate matter collected thereon; (ii) combusting HC and/or CO in the exhaust gas downstream from an engine manifold and upstream of the CSF on a catalysed sensor means to generate a signal indicative of a concentration of HC and/or CO in the exhaust gas, wherein the catalysed sensor means is the only catalysed component in the exhaust system disposed between the engine manifold and the CSF; (iii) correlating the signal with a value for the enthalpy of combustion of HC and/or CO in the exhaust gas; and (iv) controlling the content of HC and/or CO in step (i) in response to the enthalpy value determined in step (iii), thereby to maintain a temperature of the CSF within and pre-determined range.
이 특허에 인용된 특허 (10)
-
Faber Margaret K. ; Xie Yuming ; Zhou Zhigang, Automotive hydrocarbon sensor.
-
Faber Margaret K. ; Xie Yuming, Automotive hydrocarbon sensor system.
-
Kotwicki Allan J. (Sterling Heights MI) Hamburg Douglas R. (Birmingham MI), Catalyst monitoring using ego sensors.
-
Sugiyama Tomio,JPX ; Miwa Naoto,JPX ; Shibata Masahiro,JPX ; Sano Hiromi,JPX ; Tanaka Akio,JPX, Composite gas sensor.
-
Hirota, Shinya; Tanaka, Toshiaki; Itoh, Kazuhiro; Nakatani, Koichiro; Kimura, Koichi; Asanuma, Takamitsu, Exhaust gas purification device.
-
Kakwani,Ramesh M.; Voss,Kenneth C.; Patchett,Joseph A.; Grimston,Karl R., Exhaust system for enhanced reduction of nitrogen oxides and particulates from diesel engines.
-
Ueno,Shouichirou; Kawashima,Junichi; Otake,Makoto; Kondou,Terunori; Tsutsumoto,Naoya; Inoue,Takao; Koga,Toshimasa, Filter regeneration control.
-
Wang, Yue Yun; Akinyemi, Wole C., Method and apparatus for soot filter catalyst temperature control with oxygen flow constraint.
-
Imai, Takehito; Suzuki, Tsuneo; Gabe, Masashi; Ochi, Naofumi, Regenerative control method for continuous regenerative diesel particulate filter device.
-
Micheli Adolph L. (Mount Clemens MI) Dungan Dennis F. (Mount Clemens MI), Thermoelectric exhaust gas sensor.
이 특허를 인용한 특허 (1)
-
Phillips, Paul Richard; Hatcher, Daniel; Bergeal, David, On-board diagnostics system for catalyzed substrate.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.