Gas guide system for a combustion engine, a combustion engine and a method for operating the engine
AssigneeMTU Friedrichshafen GmbH
InventorsGünter Zitzler, Werner Kasper
Life of this patent
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Abstract
In a gas guide system, a combustion engine and a method for operating the engine comprising a gas supply arrangement for supplying gas to the engine, a gas discharge system including an exhaust gas treatment unit for releasing gas from the engine, the gas guide system including a first partial gas discharge line for discharging a first partial gas stream from a first fired cylinder group via the exhaust gas treatment unit and a second gas discharge line for discharging a second partial gas stream from a second unfired cylinder group separately from the hot gas stream directed through the exhaust gas treatment unit to keep it at operating temperatures.
Claims18
A gas guide system (10) for a combustion engine (20) for guiding gas of the combustion engine (20), the engine having first and second groups (21, 22) of cylinders, said system comprising:
- a gas supply arrangement (1) for supplying gas to the combustion engine (20),
- a gas discharge system (2) including an exhaust gas treatment unit (14) for releasing gas from the combustion engine (20),
- a first gas discharge line (3) for discharging a first partial gas stream (7) from at least one cylinder (A1-A6) of a first cylinder group (21), and
- a second gas discharge line (4) for discharging a second partial gas stream (8) from at least one cylinder (B1-B6, A1-A3) of a second cylinder group (22) wherein, during partial engine operation of the combustion engine (20) in which the at least one cylinder (A1-A6) of the first cylinder group (21) is operable with fuel injection and the at least one cylinder (B1-B6, A1-A3) of the second cylinder group (22) is operated without fuel injection,
- the first gas discharge line (3) and the second gas discharge line (4) being interconnected via a gas conducting connection (V) which includes a first separation means designed for blocking the connection (V) during partial engine operation of the combustion engine (20) and the second gas discharge line (4) including a collection line (5) which is in communication with a supply section (6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6) of the gas guide system (10) so that, during partial engine operation, at least part of the second partial gas stream (8) is supplied to the supply section instead of the exhaust gas treatment unit (14).
A combustion power system (100, 200, 300, 400, 500, 600) comprising a combustion engine (20) including a gas guide system (10) arranged on the periphery of the engine, said system comprising:
- a gas supply arrangement (1) for supplying gas to the combustion engine (20),
- a gas discharge system (2) including an exhaust gas treatment unit (14) for releasing gas from the combustion engine (20), and
- a first gas discharge line (3) for discharging for discharging a first partial gas stream (7) from at least one cylinder (A1-A6) of a first cylinder group (21), and
- a second gas discharge line (4) for discharging a second partial gas stream (8) from at least one cylinder (B1-B6, A1-A3) of a second cylinder group (22, part of 21) wherein, during partial engine operation of the combustion engine (20) in which the at least one cylinder (A1-A6) of the first cylinder group is operable with fuel injection and the at least one cylinder (B1-B6, A1-A3) of the second cylinder group is operated without fuel injection,
- the first gas discharge line (3) and the second gas discharge line (4) being interconnected via a gas conducting connection (V) which includes a first separation means designed for blocking the connection (V) during partial engine operation of the combustion engine (20),
- the discharge gas from the fired and the unfired cylinders being separated during partial engine operation and only the discharge gas from the fired cylinders being supplied to the exhaust gas treatment unit so as to provide for a temperature of the treatment unit which is sufficiently high to ensure its operation and the second gas discharge line (4) including a collection line (5) which is in communication with a supply section (6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6) of the gas guide system (10) so that, during partial engine operation, at least part of the second partial gas stream (8) is supplied to the supply section instead of the exhaust gas treatment unit (14).
Dependencies are inferred from the claim text.