IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0469876
(2002-03-05)
|
우선권정보 |
DE-201 03 874 U(2001-03-07); DE-101 53 120(2001-10-27) |
국제출원번호 |
PCT/EP02/002363
(2002-03-05)
|
§371/§102 date |
20040209
(20040209)
|
국제공개번호 |
WO02/070871
(2002-09-12)
|
발명자
/ 주소 |
- Ahlborn,Stephan
- May,Thomas
- Pietschner,Sieghard
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
8 인용 특허 :
7 |
초록
▼
The invention relates to a device (1), for the ventilation of the crankcase (20) of an internal combustion engine (2), with a breather tube (3), running from the crankcase (20) to an inlet manifold (22) on the internal combustion engine (2), in the course of which an oil-mist separator (30 ) is arra
The invention relates to a device (1), for the ventilation of the crankcase (20) of an internal combustion engine (2), with a breather tube (3), running from the crankcase (20) to an inlet manifold (22) on the internal combustion engine (2), in the course of which an oil-mist separator (30 ) is arranged. The novel device is characterized in that in the course of the breather line (3), a pump device is arranged, by means of which a reduced pressure may be generated in the crankcase (20) relative to ambient pressure.
대표청구항
▼
The invention claimed is: 1. An apparatus for ventilating a crankcase of a combustion engine, comprising a vent line running from the crankcase to an intake pipe of the combustion engine, with an oil-mist separator being arranged in the course of the vent line, wherein a pump unit is provided in th
The invention claimed is: 1. An apparatus for ventilating a crankcase of a combustion engine, comprising a vent line running from the crankcase to an intake pipe of the combustion engine, with an oil-mist separator being arranged in the course of the vent line, wherein a pump unit is provided in the course of the vent line, with the pump unit being able to generate a vacuum pressure in the crankcase that is negative in comparison with atmospheric pressure, and a bypass line with a controllable opening is conducted out of the vent line downstream of the pump unit and to the crankcase. 2. The apparatus according to claim 1, wherein a regulating valve is arranged in the bypass line and wherein this regulating valve can be adjusted according to the pressure in the crankcase. 3. The apparatus according to claim 2, wherein the regulating valve can, in addition, be adjusted according to a crankshaft speed (n) of the combustion engine and according to a position (α) of throttle valve, if any is provided in the intake pipe. 4. The apparatus according to claim 1, wherein a throttle valve is arranged in the intake pipe, wherein a vent line with a check valve branches off from the intake pipe upstream of the throttle valve and runs into the crankcase. 5. The apparatus according to claim 4, wherein the vent line ends in the intake pipe upstream of the throttle valve and a branch line provided with a regulating valve in its course branches off from the vent line between the oil-mist separator and the pump unit and ends in the intake pipe downstream of the throttle valve. 6. The apparatus according to claim 5, wherein the regulating valve that is arranged in the branch line can be adjusted according to a pressure (p) in the crankcase. 7. The apparatus according to claim 6, wherein the regulating valve can, in addition, be adjusted according to a crankshaft speed (n) of the combustion engine and according to a position (α) of the throttle valve. 8. The apparatus according to claim 5, wherein a remote-controllable shut-off valve is arranged in the vent line in addition to the check valve. 9. The apparatus according to claim 8, wherein the shut-off valve in the vent line can be adjusted according to a crankshaft speed (n) of the combustion engine and can, particularly, be set to a closed position at idle speed. 10. The apparatus according to claim 5, wherein a return line is conducted from the vent line downstream of the pump unit and to the crankcase via a branching valve that can be switched over according to a throttle valve position (α) or according to an intake pressure upstream of the throttle valve. 11. The apparatus according to claim 4, wherein the pump unit is arranged between the oil-mist separator and the point where the vent line ends in the intake pipe. 12. The apparatus according to claim 1, wherein the pump unit is one of a suction pump and an injector. 13. The apparatus according to claim 12, wherein the suction pump that forms the pump unit is one of a radial-flow blower and a side-channel blower with one of an electric motor drive and a mechanical drive derived from the combustion engine. 14. The apparatus according to claim 13, wherein one of an electric switch and voltage regulator is connected in series with the electric motor driving the suction pump, with this switch or regulator being adjustable according to a crankcase pressure (p). 15. The apparatus according to claim 12, wherein the injector forming the pump unit can be driven by one of compressed air from one of the outlet side of a turbocharger arranged in the course of the intake pipe and forming a part of the combustion engine that is equipped with the apparatus and by compressed air from a compressed air system of a motor vehicle that is equipped with the apparatus. 16. The apparatus according to claim 15, wherein that a regulating valve is incorporated in a compressed air supply line running to the injector, wherein the regulating valve can be adjusted according to a crankcase pressure (p). 17. The apparatus according to claim 13, including a vent line that branches off from the intake pipe upstream of the throttle valve and runs into the crankcase and wherein a bypass duct with a regulating valve is connected to the vent line, wherein this bypass duct short-circuits the pump unit and this regulating valve can be adjusted according to a crankcase pressure (p). 18. The apparatus according to claim 1, wherein adjustable and switchable components of the apparatus can be actuated and monitored by one of existing motor electrics and motor electronics associated with the combustion engine.
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