Multi-cylinder diesel engine
AssigneeMotor und Turbinen-Union Freidrichshafen GmbH
InventorsHerbert Deutschmann, Franz Geray
Life of this patent
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Abstract
A multi-cylinder supercharged diesel engine with low compression ratio, in which for starting and possibly at partial load operation a number of the cylinders are operated as a compressor and the compressed air produced by the same is fed to the remaining cylinders operating as an engine in addition to the combustion air sucked-in by the latter to achieve sufficient ignition conditions. One or several intermediate storage devices for the compressed air are provided which are connected with the cylinders operating as the compessor by way of valves adapted to be closed and with the cylinders operating as the engine by way of valves controlled in dependence on the piston position during the suction stroke and/or compression stroke of the corresponding cylinder operating as the engine.
Claims20
A supercharged diesel engine with a compression ratio of less than 1:12, the engine including a plurality of cylinders each having a piston reciprocally mounted therein and intake valve means and exhaust valve means for each of the cylinders, a number of the plurality of cylinders are operable for a starting operation and during a partial load operation as a compressor means for producing compressed air, the remaining cylinders of the plurality of cylinders are operable as an engine, and means for feeding the compressd air produced by the compressor means to the remaining cylinders such that the remaining cylinders are supplied with compressed air in addition to combustion air sucked in through the intake valve means of the remaining cylinders, characterized in that the feeding means includes at least one intermediate storage means for accommodating the compressed air operatively connected with the compressor means and the remaining cylinders, a first valve means are provided for controlling a flow of compressed air from the compressor means to the intermediate storage means, means are provided for controlling a positioning of the first valve means during the starting operation and partial load operation of the engine, a second valve means is provided for controlling a flow of the compressed air from the at least one intermediate storage means to the remaining cylinders, and in that means are provided for controlling a positioning of the second valve means in dependence upon a position of the piston in the remaining cylinders.
Dependencies are inferred from the claim text.