IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0904369
(2004-11-06)
|
등록번호 |
US-7331172
(2008-02-19)
|
우선권정보 |
SE-0201410(2002-05-07) |
발명자
/ 주소 |
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출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
11 |
초록
▼
A system and method for the regeneration of a particle filter (13) arranged downstream from a catalyzer unit (14) in an exhaust canal (10) arranged to an internal combustion engine (2), where the internal combustion engine (2) is arranged to assume a first operational mode (60) in which a driving to
A system and method for the regeneration of a particle filter (13) arranged downstream from a catalyzer unit (14) in an exhaust canal (10) arranged to an internal combustion engine (2), where the internal combustion engine (2) is arranged to assume a first operational mode (60) in which a driving torque is emitted and a second operational mode (80) constituting engine braking where the internal combustion engine (2) supplies compression work to a gas mixture which flows through the exhaust canal (10) without a corresponding expansion work having been emitted from the gas mixture, and a vehicle where the method is utilized.
대표청구항
▼
What is claimed is: 1. A method for regenerating a particle filter (13) arranged in thermic connection to a catalyzer unit (14) in an exhaust canal (10) connected to an internal combustion engine (2), and wherein the internal combustion engine (2) is arranged to assume a first operational mode (60)
What is claimed is: 1. A method for regenerating a particle filter (13) arranged in thermic connection to a catalyzer unit (14) in an exhaust canal (10) connected to an internal combustion engine (2), and wherein the internal combustion engine (2) is arranged to assume a first operational mode (60) in which a driving torque is produced and a second operational mode (80) which constitutes engine braking, where the internal combustion engine (2) supplies a compression work to a gas mixture which flows through the internal combustion engine (2) and the exhaust canal (10) without a corresponding expansion work having been emitted from the gas mixture, said method comprising: determining, using a control unit (22), that the internal combustion engine (2) is driven in the second operational mode (80) corresponding to engine braking with the temperature of the gas mixture in the exhaust canal rising; supplying fuel, via an injection unit (21) to the exhaust canal (10) during the second operational mode (80); and exposing the catalyzer unit (14) to the fuel which is oxidized at the particle filter (13) which is heated to such a temperature that the soot particles are transformed to carbon dioxide under reaction with oxygen contained in the gas mixture. 2. The method as recited in claim 1, wherein the fuel is supplied directly to the exhaust canal (10) via an injection unit (21) arranged with the exhaust canal. 3. The method as recited in claim 1, wherein the fuel is supplied when an exhaust gas temperature at the particle filter has reached at least 250�� C. because of engine braking. 4. The method as recited in claim 1, wherein the fuel is supplied when an exhaust gas temperature at the particle filter has reached at least 450�� C. because of engine braking. 5. The method as recited in claim 1, wherein the fuel is supplied via said injection unit (21) which is arranged relative to said internal combustion engine (2) to supply fuel to a combustion chamber (37) thereof at a point in time that the fuel is allowed to pass the combustion chamber (37) into the exhaust canal (10) in a substantially non-spent state, with said substantially non-spent fuel being oxidized when coming into contact with the catalyzer unit (14), and by means of which the soot particle filter (13) is heated to the temperature that soot particles are transformed to carbon dioxide under reaction with oxygen contained in exhaust gases of the engine (2). 6. The method as recited in claim 5, wherein the fuel is supplied during one of an expansion stroke and exhaust stroke of the internal combustion engine. 7. A vehicle (1) comprising an internal combustion engine (2) and an exhaust system (10) connected to the internal combustion engine (2) and a particle filter (13) in thermic connection to a catalyzer (14) in said exhaust system (10) where the internal combustion engine (2) is equipped with members for engine braking (23) and by means of which the internal combustion engine (2) supplies compression work to a gas mixture which flows through the internal combustion engine (2) and the exhaust canal (10), but without expansion work having been emitted from the gas mixture, a control unit (22) is arranged with the internal combustion engine (2) and the engine (2) is configured to assume a first operational mode (60) where the internal combustion engine emits a driving torque and a second operational mode (80) constituting engine braking, an injection system ( 20,21 ) is arranged on said vehicle (1) so that in a case of need for regeneration of the soot particle filter (13), fuel is supplied to the exhaust canal (10) during the second operation mode (80), and by means of which the catalyzer unit (14) is exposed to the fuel which is oxidized, by means of which the soot particle filter (13) is heated to such a temperature that soot particles are transformed to carbon dioxide under reaction with oxygen comprised in said exhaust gases. 8. The vehicle as recited in claim 7, further comprising an injection unit (21) arranged with the exhaust canal to supply fuel directly thereto. 9. The vehicle as recited in claim 7, wherein the injection system (20,21) is connected to the internal combustion engine for the supply of fuel to combustion chambers (37) arranged in the internal combustion engine (2), with the injection system being arranged to supply fuel to said combustion chambers (37) in such a state that the fuel is allowed to pass the combustion chamber (37) into the exhaust canal in a non-spent or only partially spent state. 10. The vehicle as recited in claim 9, wherein the injection system (20,21) is arranged to supply fuel during the expansion stroke or the exhaust stroke of the internal combustion engine. 11. A method for the regeneration of a particle filter (13) arranged in thermic connection to a catalyzer unit (14) in an exhaust canal (10) connected to an internal combustion engine (2), where the internal combustion engine (2) is arranged to assume a first operational mode (60) in which a driving torque is produced and a second operational mode (80) which constitutes engine braking, where the internal combustion engine (2) supplies a compression work to a gas mixture which flows through the internal combustion engine (2) and the exhaust canal (10) without a corresponding expansion work having been emitted from the gas mixture, characterized in that the following steps are carried out: a control unit (22) determines that the internal combustion engine (2) is driven in said second operational mode (80) corresponding to engine braking with the temperature of said gas mixture in the exhaust canal rising, an injection unit (21a-21f, 21g) supplies fuel to the exhaust canal (10) during said second operational mode (80), with said catalyzer unit (14) being exposed to said fuel which is oxidized with the particle filter (13) being heated to such a temperature that the soot particles are transformed to carbon dioxide under reaction with oxygen comprised in said gas mixture. 12. Method for regeneration according to claim 11, characterized in that fuel is supplied directly to the exhaust canal (10) via an injection unit (21g) arranged to the exhaust canal. 13. Method for regeneration according to claim 11, characterized in that fuel is supplied in those cases where the exhaust gas temperature at the particle filter by means of the engine braking effect is at least 250�� C., preferably at least 450�� C. 14. A method for regeneration of a particle filter according to claim 11, characterized in that said fuel is supplied by an injection unit (21a-21f) which is arranged to said internal combustion engine (2) which supplies fuel to a combustion chamber (37) in the internal combustion engine (2) at such a point in time that the fuel is allowed to pass the combustion chamber (37) into the exhaust canal (10) in a non-spent or only partly spent condition, with said spent or only partly spent fuel being oxidized when coming into contact with the catalyzer unit (14), by means of which the soot particle filter (13) is heated to such a temperature that soot particles are transformed to carbon dioxide under reaction with oxygen comprised in said exhaust gases. 15. Method for regeneration according to claim 14, characterized in that said fuel is supplied during the expansion stroke of the internal combustion engine or during its exhaust stroke. 16. A vehicle (1) comprising an internal combustion engine (2) and an exhaust system (10) connected to the internal combustion engine (2) and a particle filter (13) in thermic connection to a catalyzer (14) in said exhaust system (10) where the internal combustion engine (2) is equipped with organs for engine braking (23), by means of which the internal combustion engine (2) is arranged to supply a compression work to a gas mixture which flows through the internal combustion engine (2) and the exhaust canal (10) without a corresponding expansion work having been emitted from the gas mixture, with a control unit (22) arranged to the internal combustion engine (2) arranged to assume a first operational mode (60) where the internal combustion engine emits a driving torque and a second operational mode (80) constituting said engine brake, characterized in that an injection system (20,21) arranged to said vehicle (1) is arranged to, in case of need of regeneration of the soot particle filter (13), supply fuel to the exhaust canal (10) during said second operation mode (80), by means of which the catalyzer unit (14) is exposed to said fuel which is oxidized, by means of which the soot particle filter (13) is heated to such a temperature that soot particles are transformed to carbon dioxide under reaction with oxygen comprised in said exhaust gases. 17. A vehicle according to claim 16, characterized in that the vehicle comprises an injection unit (21g) arranged to the exhaust canal and being arranged to supply fuel directly to the exhaust canal (10). 18. A vehicle according to claim 16, characterized in that said injection system (20,21) consists of an injection system (20,21) connected to the internal combustion engine for the supply of fuel to combustion chambers (37) arranged in the internal combustion engine (2), with the injection system being arranged to supply fuel to said combustion chambers (37) in such a state that the fuel is allowed to pass the combustion chamber (37) into the exhaust canal in a non-spent or only partially spent state. 19. A vehicle according to claim 18, characterized in that said injection system is arranged to supply fuel during the expansion stroke or the exhaust stroke of the internal combustion engine.
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