Two-stage turbocharged engine
AssigneeCaterpillar Motoren GmbH & Co. KG
InventorUdo Schlemmer-Kelling
Life of this patent
Estimating the term…
Abstract
A turbocharged internal combustion engine disclosed that may comprise an engine block with a first end side opposing a second end side and a two-stage turbocharged system. The two-stage turbocharged system may comprise a low-pressure turbocharger with a first turbine and a first compressor and a high-pressure turbocharger with a second turbine and a second compressor. A turbine connection may fluidly connect the first turbine and the second turbine and a compressor connection fluidly connects the first compressor and the second compressor. The low-pressure turbocharger is mounted at the first end side of the engine block and the high-pressure turbocharger is mounted at a second end side of the engine block.
Claims30
A turbocharged internal combustion engine, comprising:
- an engine block with a first end side opposing a second end side having a plurality of cylinders;
- a two-stage turbocharged system comprising
- a low-pressure stage turbocharger mounted at the first end side of the engine block and comprising a first turbine and a first compressor configured for pre-compressing charge air during operation of the turbocharged internal combustion engine,
- a high-pressure stage turbocharger mounted at the second end side of the engine block and comprising a second turbine and a second compressor configured for compressing the pre-compressed charge air during operation of the turbocharged internal combustion engine,
- a compressor connection fluidly connecting the first compressor and the second compressor;
- and
- a turbine connection fluidly connecting the first turbine and the second turbine;
- an selective catalytic reduction catalyst positioned within a catalyst section of the turbine connection;
- an exhaust manifold fluidly connecting exhaust outlets of the plurality of cylinders with an inlet of the second turbine;
- and
- an injection system with an injection inlet configured for injecting a chemical substance for the selective catalytic reduction through the injection inlet into the exhaust manifold and/or the second turbine.
A turbocharged internal combustion engine, comprising:
- an engine block with a first end side opposing a second end side having a plurality of cylinders;
- and
- a two-stage turbocharged system comprising
- a low-pressure stage turbocharger comprising a first turbine and a first compressor configured for pre-compressing charge air during operation of the turbocharged internal combustion engine,
- a high-pressure stage turbocharger comprising a second turbine and a second compressor configured for compressing the pre-compressed charge air during operation of the turbocharged internal combustion engine,
- a compressor connection fluidly connecting the first compressor and the second compressor;
- a turbine connection fluidly connecting the first turbine and the second turbine;
- and
- an SCR catalyst positioned within a catalyst section of the turbine connection;
- wherein a low-pressure side unit comprising the low-pressure stage turbocharger is fixedly mounted at the first end side of the engine block and a high-pressure side unit comprising the high-pressure stage turbocharger is fixedly mounted at the second end side of the engine block.
A turbocharged internal combustion engine, comprising:
- an engine block with a first end side opposing a second end side;
- and
- a two-stage turbocharged system comprising
- a low-pressure stage turbocharger mounted at the first end side of the engine block and comprising a first turbine and a first compressor configured for pre-compressing charge air during operation of the turbocharged internal combustion engine,
- a high-pressure stage turbocharger mounted at the second end side of the engine block and comprising a second turbine and a second compressor configured for compressing the pre-compressed charge air during operation of the turbocharged internal combustion engine,
- a compressor connection fluidly connecting the first compressor and the second compressor;
- and
- a turbine connection fluidly connecting the first turbine and the second turbine.
Dependencies are inferred from the claim text.