Piston engine and associated operating process
AssigneeDaimlerChrysler AG
InventorCharles Robert Koch
Life of this patent
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Abstract
A process operates a piston engine in which at least one intake valve and at least one exhaust valve are assigned to each of the cylinders of the piston engine. The piston engine is equipped with a valve actuator permitting variable opening and closing times. An engine control system of the piston engine determines a current actual value of an exhaust gas mass proportion. The value forms the contents of the cylinders together with a fresh gas mass proportion after the fresh gas has been supplied and before combustion. The engine control system actuates the valve actuator in order to set a desired value for the exhaust gas mass proportion.
Claims19
Process for operating a piston engine in which at least one intake valve and at least one exhaust valve are assigned to each cylinder of said piston engine and in which a valve actuator permits variable opening and closing times for the valves, comprising
- determining a current actual value of an exhaust gas mass proportion which forms the contents of each cylinder together with a fresh gas mass proportion after fresh gas has been supplied to each cylinder and before combustion, and
- actuating the valve actuator to set a desired value for the exhaust gas mass proportion.
Piston motor for a motor vehicle and the like, comprising a plurality of cylinders, each of which has at least one intake valve and at least one exhaust valve,
- an engine control system configured to determine a current actual value of an exhaust gas mass proportion which forms contents of the cylinders together with a fresh gas mass proportion after fresh gas has been supplied and before combustion, and
- a valve actuator configured to permit variable opening and closing times for the valves, wherein the engine control system is configured to actuate the valve actuator to set a desired value for the exhaust gas mass proportion.
Dependencies are inferred from the claim text.