IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0380581
(2009-02-26)
|
등록번호 |
US-8201393
(2012-06-19)
|
우선권정보 |
DE-10 2008 012 780 (2008-03-05) |
발명자
/ 주소 |
- Zapf, Friedrich
- Stegmann, Heico
- Lannig, Andreas
- Lang, Klaus
- Schmidt, Christian
- Branco, Alexandre
|
출원인 / 주소 |
|
대리인 / 주소 |
Lipsitz & McAllister, LLC
|
인용정보 |
피인용 횟수 :
11 인용 특허 :
67 |
초록
▼
The invention relates to an exhaust-gas aftertreatment device, comprising a control unit (4) for controlling a diaphragm pump (2) that draws a urea/water solution out of a circuit and pumps it, via a pressure filter (3), to a metering unit comprising an atomizing nozzle for atomizing the urea/water
The invention relates to an exhaust-gas aftertreatment device, comprising a control unit (4) for controlling a diaphragm pump (2) that draws a urea/water solution out of a circuit and pumps it, via a pressure filter (3), to a metering unit comprising an atomizing nozzle for atomizing the urea/water solution into an exhaust-gas stream. In advantageous developments, the metering unit comprises a metering valve, including an atomizing nozzle, a pressure and temperature sensor, a heating means and a return baffle.
대표청구항
▼
1. Exhaust-gas aftertreatment device, comprising: a diaphragm pump,a pressure filter disposed downstream of the diaphragm pump,a metering unit,a control unit for controlling the diaphragm pump, anda pump unit, which comprises the diaphragm pump, the pressure filter and the control unit,the diaphragm
1. Exhaust-gas aftertreatment device, comprising: a diaphragm pump,a pressure filter disposed downstream of the diaphragm pump,a metering unit,a control unit for controlling the diaphragm pump, anda pump unit, which comprises the diaphragm pump, the pressure filter and the control unit,the diaphragm pump being adapted to draw a urea/water solution out of a circuit and pump the urea/water solution through the pressure filter to the metering unit,said metering unit comprising an atomizing nozzle for atomizing the urea/water solution into an exhaust-gas stream,wherein: provided between the diaphragm pump and the pressure filter there is a housing part of a pump unit housing within which channels extend for routing the urea/water solution, anda cooling-water channel is provided in the pump unit, the cooling-water channel being connected to a cooling-water circuit of a motor vehicle engine, such that the urea/water solution can be thawed within the pump unit. 2. The exhaust-gas aftertreatment device according to claim 1, wherein the urea/water solution is routed from the pressure filter to a pressure connection of the pump unit, and into a urea/water line, which leads to a metering unit connection of the metering unit. 3. The exhaust-gas aftertreatment device according to claim 1, wherein a catalytic converter succeeds the atomizing nozzle in the exhaust-gas stream. 4. The exhaust-gas aftertreatment device according to claim 1, wherein the atomizing nozzle is a swirl nozzle. 5. The exhaust-gas aftertreatment device according to claim 1, wherein a diaphragm of the diaphragm pump that builds up pressure in a pressure chamber is realized as a closed component, on which a supporting element of a connecting rod bears on one side. 6. The exhaust-gas aftertreatment device according to claim 1, wherein the control unit is arranged in a control housing and comprises a printed circuit board, which is fastened on a metal plate in such a way that heat is directed outwards. 7. The exhaust-gas aftertreatment device according to claim 6, wherein the metal plate has at least one outwardly directed rib. 8. The exhaust-gas aftertreatment device according to claim 1, wherein the diaphragm is moved back and forth by an eccentric gearing. 9. The exhaust-gas aftertreatment device according to claim 1, wherein the pressure filter is tightly screw-connected to the pump unit. 10. The exhaust-gas aftertreatment device according to claim 1, wherein the metering unit comprises a metering valve, which, together with a tank, is integrated into a circuit of the circulating urea/water solution, such that the metering valve is cooled and a pressure in the urea/water solution can be relieved, even without supplied electric power, via a return baffle in the flow from the metering valve to the tank. 11. The exhaust-gas aftertreatment device according to claim 1, wherein the diaphragm of the diaphragm pump is provided in the pump unit, at least one compressible component is provided in the metering unit, a pressure relief device is provided in a tank for the urea/water solution, and elastically deformable urea/water solution lines are provided. 12. The exhaust-gas aftertreatment device according to claim 11, wherein the compressible component of the metering unit is a sealing membrane. 13. The exhaust-gas aftertreatment device according to claim 11, wherein the compressible component of the metering unit is a bellows. 14. The exhaust-gas aftertreatment device according to claim 11, wherein the channels for routing the urea/water solution are connected to a compressible equalization element. 15. The exhaust-gas aftertreatment device according to claim 1, wherein a pressure and temperature sensor, for measuring the pressure and the temperature of the urea/water solution, is provided in the metering unit. 16. The exhaust-gas aftertreatment device according to claim 1, wherein the metering unit has an electric heating means.
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