IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0708075
(2010-02-18)
|
등록번호 |
US-8235013
(2012-08-07)
|
우선권정보 |
DE-10 2009 014 087 (2009-03-23) |
발명자
/ 주소 |
- Spiegel, Leo
- Tran, Van-Khanh
- Voss, Hartmut
- Schwarzenthal, Dietmar
|
출원인 / 주소 |
- Dr. Ing. h.c. F. Porsche Aktiengesellschaft
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
11 |
초록
▼
An internal combustion engine with a plurality of cylinders, which are each assigned an inlet valve, an outlet valve and a combustion space, with an inlet camshaft connected to a camshaft adjuster, with an outlet camshaft connected to a camshaft adjuster, with a switchable inlet-valve drive which ha
An internal combustion engine with a plurality of cylinders, which are each assigned an inlet valve, an outlet valve and a combustion space, with an inlet camshaft connected to a camshaft adjuster, with an outlet camshaft connected to a camshaft adjuster, with a switchable inlet-valve drive which has a plurality of inlet cams for actuating the respective inlet valve, with a switchable outlet-valve drive which has a plurality of outlet cams for actuating the respective outlet valve, and with an exhaust-gas system. The internal combustion engine is operated with compression ignition or with spark ignition as a function of the operating point. For this purpose, for the compression ignition, a specific residual exhaust-gas quantity is set in the combustion space. Furthermore, the internal combustion engine is operated as a function of the operating point by means of an outlet cam.
대표청구항
▼
1. Internal combustion engine comprising: a plurality of cylinders, which are each assigned at least one inlet valve, at least one outlet valve and a combustion space,at least one inlet camshaft and at least one outlet camshaft,a switchable inlet-valve drive for actuating the inlet valves,a switchab
1. Internal combustion engine comprising: a plurality of cylinders, which are each assigned at least one inlet valve, at least one outlet valve and a combustion space,at least one inlet camshaft and at least one outlet camshaft,a switchable inlet-valve drive for actuating the inlet valves,a switchable outlet-valve drive for actuating the outlet valves,an exhaust-gas system which is provided with an exhaust-gas back-pressure adjustment device for setting an exhaust-gas back-pressure as a function of an operating point,wherein the internal combustion engine is configured to operate with compression ignition or with spark ignition as a function of the operating point,wherein in a compression-ignition mode, a residual exhaust-gas quantity is capable of being set in the combustion space with the aid of the exhaust-gas back-pressure adjustment device,wherein the outlet-valve drive is configured in such a way that a plurality of cams are selectively provided for actuating a respective outlet valve,wherein at least one outlet cam includes a plurality of cam elevations for setting a plurality of outlet opening phases. 2. Internal combustion engine according to claim 1, wherein the outlet cam for setting a plurality of outlet opening phases is configured as a double cam. 3. Internal combustion engine according to claim 1, wherein the exhaust-gas back-pressure adjustment device is configured as an exhaust-gas flap and is positioned downstream of an exhaust-gas catalytic converter that is in the exhaust-gas system. 4. Internal combustion engine according to claim 1, wherein the exhaust-gas back-pressure adjustment device is positioned upstream of an inlet of an exhaust-gas turbine that is in the exhaust-gas system. 5. Internal combustion engine according to claim 1, wherein the exhaust-gas back-pressure adjustment device is configured as an integral part of an exhaust-gas turbocharger, wherein a setting of the exhaust-gas back-pressure takes place with the aid of a variable turbine geometry of an exhaust-gas turbocharger. 6. Internal combustion engine according to claim 1, wherein the outlet-valve drive is configured in such a way that a first outlet opening phase and a second outlet opening phase can be set, wherein the second outlet opening phase is capable of being set during an inlet opening phase. 7. Internal combustion engine according to claim 1, wherein the outlet-valve drive has a sliding-cam device. 8. Internal combustion engine according to claim 1, wherein the inlet-valve drive has a sliding-cam device. 9. Internal combustion engine according to claim 1, wherein the inlet camshaft and the outlet camshaft are connected in each case to a camshaft adjuster. 10. Method for operating an internal combustion engine according to claim 1, wherein the internal combustion engine is operated, in the compression-ignition mode, by means of an outlet cam, by means of which a first outlet opening phase and a second outlet opening phase take place, the second outlet opening phase commencing during an inlet opening phase, and, at a first operating point of the compression-ignition mode, the residual exhaust-gas quantity in the combustion space being dimensioned as a function of a valve interference set between the inlet and the outlet valve during a charge exchange, and, at a second operating point of the compression-ignition mode, the residual exhaust-gas quantity in the combustion space being dimensioned as a function of a duration of the second outlet opening phase. 11. Method according to claim 10, wherein the internal combustion engine is operated with spark ignition during a changeover from the first operating point to the second operating point, and vice versa. 12. Method according to claim 10, wherein the exhaust-gas system is provided with an exhaust-gas back-pressure adjustment device, by which the exhaust-gas back-pressure in an exhaust manifold of the exhaust-gas system is varied as a function of an operating point. 13. Method according to claim 10, wherein the residual exhaust-gas quantity in the combustion space is dimensioned as a function of a position of the exhaust-gas back-pressure adjustment device. 14. Method according to claim 10, wherein, at the second operating point of the compression-ignition mode, the inlet valves and the outlet valves are controlled in such a way that a specific exhaust-gas quantity is sucked out of the exhaust-gas system back into the combustion space. 15. Method according to claim 10, wherein the outlet-valve drive and the inlet-valve drive are configured in such a way that different valve lifts and/or different control times are set in each case as a function of an operating point on the outlet side and on the inlet side.
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