IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0927866
(2010-11-27)
|
등록번호 |
US-8522547
(2013-09-03)
|
우선권정보 |
DE-10 2008 039 086 (2008-08-21) |
발명자
/ 주소 |
- Sumser, Siegfried
- Krätschmer, Stephan
- Müller, Markus
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
11 |
초록
▼
In an exhaust gas turbocharger for an internal combustion engine of a motor vehicle with a turbine comprising a turbine housing with at least a first and a second spiral channel, each being coupled to an exhaust gas line of an exhaust gas tract of the internal combustion engine for conducting exhaus
In an exhaust gas turbocharger for an internal combustion engine of a motor vehicle with a turbine comprising a turbine housing with at least a first and a second spiral channel, each being coupled to an exhaust gas line of an exhaust gas tract of the internal combustion engine for conducting exhaust gas to a turbine wheel arranged within the turbine housing and driving a compressor wheel of a compressor of the exhaust gas turbocharger, an area ratio Qg of the turbine corresponds to the formula Qg=(Aλ+AAGR)/AR0.40, wherein Aλ refers to a narrowest flow cross-section of the first spiral channel, AAGR to a narrowest flow cross-section of the second spiral channel (52b) and AR to a wheel exit flow cross-section of the turbine exhaust channel. The invention further relates to a motor vehicle with an internal combustion engine and such an exhaust gas turbocharger.
대표청구항
▼
1. An exhaust gas turbocharger (12) for an internal combustion engine (10) of a motor vehicle with a turbocharger including a turbine (26) with a turbine housing (50) having at least a first and a second spiral channel (52a, 52b), each of said channels being connected to an exhaust gas line (34a, 34
1. An exhaust gas turbocharger (12) for an internal combustion engine (10) of a motor vehicle with a turbocharger including a turbine (26) with a turbine housing (50) having at least a first and a second spiral channel (52a, 52b), each of said channels being connected to an exhaust gas line (34a, 34b) of an exhaust gas tract (36) of the internal combustion engine (10) for conducting exhaust gas to the turbine housing (50), including a turbine wheel channel (54) with a turbine wheel (24) arranged therein, said turbine wheel (24) being operable by exhaust gas which is supplied by the internal combustion engine (10) and guided through the spiral channels (52a, 52b) onto the turbine wheel (24) for driving a compressor wheel (20) of a compressor (18) of the exhaust gas turbocharger (12), which is rigidly coupled to the turbine wheel by way of a common shaft (22), said turbine (26) housing having an area ratio Qg which has a value larger than 0.4, the area ratio Qg of the turbine being defined by the formula Qg=(Aλ+AAGR)/AR wherein: Aλ refers to a narrowest flow cross-sectional area of the first spiral channel (52a);AAGR to a narrowest flow cross-sectional area of the second spiral channel (52a); andAR to a wheel exit cross-sectional area of the turbine wheel channel (54). 2. The exhaust gas turbocharger (12) according to claim 1, wherein the area ratio Qg of the turbine is at least 0.45 and preferably at least 0.5. 3. The exhaust gas turbocharger according to claim 1, wherein an area ratio Qλ between the narrowest flow cross-section Aλ of the first spiral channel (52a) and the exit cross-section AR of the turbine wheel channel (54) is at least 0.35. 4. The exhaust gas turbocharger according to claim 3, wherein the area ratio Qλ of the narrowest flow cross-section Aλ of the first spiral channel (52a) and exit cross-section AR of the turbine wheel channel (54) is at least 0.4, preferably at least 0.5 and in particular 0.6. 5. The exhaust gas turbocharger according to claim 1, wherein an area ratio QAGR between the narrowest flow cross-section AAGR of the second spiral channel (52b) and the wheel exit cross-section AR of the turbine wheel channel (54) is at most 0.3. 6. The exhaust gas turbocharger according to claim 5, wherein the area ratio QAGR between the narrowest flow cross-section AAGR of the second spiral channel (52b) and the wheel exit cross-section AR of the turbine wheel channel (54) is at most 0.28, preferably at most 0.25 and in particular not more than 0.1. 7. The exhaust gas turbocharger according to claim 1, wherein the narrowest flow cross-section Aλ of at least one of the first spiral channel (52a) and the narrowest flow cross-section AAGR of the second spiral channel (52b) is provided in the opening region of the first or, respectively, the second spiral channel (52a, 52b) in the turbine wheel channel (54). 8. The exhaust gas turbocharger (12) according to claim 1, wherein at least one of the first and the second channel (52a, 52b) comprises at least two spiral segment channels which are separated in a fluidic manner and which are coupled to different exhaust gas lines (34a, 34b) of the internal combustion engine (10). 9. The exhaust gas turbocharger (12) according to claim 1, wherein the turbine (26) comprises a guide vane structure arranged in at least one of the spiral channel inlet to the turbine wheel. 10. The exhaust gas turbocharger according to claim 9, wherein at least one of the narrowest flow cross-section Aλ of the first spiral channel (52a) and the narrowest flow cross-sectional area AAGR of the second spiral channel (52b) is formed by the guide vane structure which is adjustable. 11. A motor vehicle with an internal combustion engine (10) comprising at least two groups of cylinders (30a-f), which are connected to at least two exhaust gas lines (34a, 34b) of an exhaust gas tract (36) and with an exhaust gas turbocharger (12) comprising a compressor (18) arranged in an intake tract (14) of the internal combustion engine (10) and a turbine (26) arranged in the exhaust gas tract (36) of the internal combustion engine (10), the turbine (26) comprising a turbine housing (50) with at least a first spiral channel (52a) coupled to a first exhaust gas line (34a), a second spiral channel (52b) coupled to a second exhaust gas line (34b), and a turbine wheel (24) arranged within a turbine wheel channel (54) of the turbine housing (50) for driving the turbine wheel (24) by means of the internal combustion engine (10) exhaust gas conducted through the at least first and second spiral channels (52a, 52b) for driving a compressor wheel (20) of the compressor (18), the compressor wheel being rigidly coupled to the turbine wheel by a common shaft (22), said turbine (26) housing having an area ratio Qg which has a value larger than 0.4, the area ratio Qg of the turbine being defined by the formula Qg=(Aλ+AAGR)/AR1 wherein: Aλ refers to a narrowest flow cross-sectional area of the first spiral channel (52a);AAGR to a narrowest flow cross-sectional area of the second spiral channel (52a); andAR to a wheel exit cross-sectional area of the turbine wheel channel (54).
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