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AssigneeDaimler AG
InventorsSiegfried Sumser, Stephan Krätschmer, Markus Müller
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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)/AR>0.40, 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.
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
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
Dependencies are inferred from the claim text.