Method of operating a multi-cylinder internal combustion engine
AssigneeDaimlerChrysler AG
InventorStephen Von Andrian-Werburg
Life of this patent
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Abstract
In a multi-cylinder internal combustion engine in which, for fuel saving purposes during part-load operation, some of the cylinders (2) can be cut off by an interruption of the fuel supply to the respective cylinders and by the shutdown and closing of their inlet valves (6) and outlet valves (7) until the refiring of the cylinders (2) when higher operating loads of the internal combustion engine (1) are required, a smooth operating behavior of the internal combustion engine (1) during the changeover between the fired and the cut-off operation of the cylinders (2) is achieved by an additional compensating opening of the outlet valves (7) irrespective of the gas-exchange control times of the valves for fired cylinder operation.
Claims9
A method of operating a multi-cylinder internal combustion engine, wherein some of the cylinders (2) are cutoff during part-load operation of the engine by an interruption of the fuel supply to the respective cylinders (2) and the shutdown and closing of the inlet valves (6) and outlet valves (7) of the respective cylinders up to the re-firing of the cylinders (2) in the event of higher operating loads (L) of the internal combustion engine (1), said method comprising the steps of opening during changeover between the fired operation and the cut-off operation of the cylinder (2) in a compensating opening procedure, the respective outlet valves (7) irrespective of the gas-exchange control times of the engine for fired operation.
Dependencies are inferred from the claim text.