Piston engine and associated operating process

Details Piston engine and associated operating process Piston engine and associated operating process

2005-07-12

2005-07-12

Wolfe, Jr., Willis R. (Department: 3747)

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

C123S090110, C123S568210

Reexamination Certificate

active

06915790

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.

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