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AssigneeMTU Motoren- und Turbinen-Union Friedrichshafen GmbH
InventorsBernhard Bachle, Hans Sudmanns, Ralph-Michael Schmidt
Estimating the term…
The production of harmful substances during the operation of multi-cylinder diesel engines is reduced by separating the cylinders of the engine into two groups in combination with an exhaust gas return from one group to the other. The first group includes a plurality of the cylinders (2 to 6). The second group includes at least one cylinder (7), which is separated from the first group as far as combustion is concerned. A first fresh air suction intake (9) supplies fresh air to the group of first cylinders (2 to 6). An exhaust gas return device (24) feeds either directly or indirectly exhaust gas from the at least one second cylinder (7) through the first fresh air suction intake (9) to the group of first cylinders (2 to 6). A second fresh air suction intake (10) supplies fresh air to the second group of cylinders (7). The second fresh air suction intake (10) may also receive some exhaust gas which is then combusted by an additional fuel supply in the second fresh air suction intake (10).
A multi-cylinder diesel engine, comprising a fresh air supply (8), a group of first cylinders (2 to 6), and at least one second cylinder (7), a first fresh air suction intake (9) connected to said fresh air supply and to said group of first cylinders (2 to 6), a second fresh air suction intake (10) connected to said fresh air supply and to said at least one second cylinder (7), an exhaust gas system (16) connected to exhaust ports of said group of first cylinders (2 to 6), and an exhaust gas return device (24) connected to an exhaust port of said at least one second cylinder (7), said exhaust gas return device (24) being further connected to said fresh air supply for returning exhaust gas from said at least one second cylinder (7) to said fresh air supply (8, 27), said diesel engine further comprising a connector conduit (CC) interconnecting said exhaust gas system (16) and said exhaust gas return device (24), and a flow control member (1A) in said connector conduit (CC) for adjusting the flow cross-sectional area of said connector conduit (CC).
A multi-cylinder diesel engine, comprising a fresh air supply (8), a group of first cylinders (2 to 6), and at least one second cylinder (7), a first fresh air suction intake (9) connected to said fresh air supply and to said group of first cylinders (2 to 6), a second fresh air suction intake (10) connected to said fresh air supply and to said at least one second cylinder (7), an exhaust gas system (16) connected to exhaust ports of said group of first cylinders (2 to 6), and an exhaust gas return device (24) connected to an exhaust port of said at least one second cylinder (7), said exhaust gas return device (24) being further connected to said fresh air supply for returning exhaust gas from said at least one second cylinder (7) to said fresh air supply (8, 27), said diesel engine further comprising an injector (I) connected to said exhaust gas return device (24) where said exhaust gas return device (24) is connected to said first fresh air suction intake (9).
A multi-cylinder diesel engine, comprising a fresh air supply (8), a group of first cylinders (2 to 6), and at least one second cylinder (7), a first fresh air suction intake (9) connected to said fresh air supply and to said group of first cylinders (2 to 6), a second fresh air suction intake (10) connected independently of said first fresh air suction intake (9) to said fresh air supply and to said at least one second cylinder (7) for producing an exhaust gas flow having a reduced soot content from said at least one second cylinder (7), an exhaust gas system (16) connected to exhaust ports of said group of first cylinders (2 to 6), and an exhaust gas return device (24) connected to an exhaust port of said at least one second cylinder (7), said exhaust gas return device (24) being further connected to said fresh air supply for returning said reduced soot content exhaust gas flow from said at least one second cylinder (7) to said fresh air supply, said reduced soot content being constantly sufficiently low so that wear and tear and contamination of said diesel engine are reduced and particle and NO emission are minimized.
Dependencies are inferred from the claim text.