Two-stroke engine assembly

Details Two-stroke engine assembly Two-stroke engine assembly

2007-06-12

2007-06-12

McMahon, Marguerite (Department: 3747)

Internal-combustion engines

Two-cycle

Rear compression

C123S0730CA

Reexamination Certificate

active

11281412

ABSTRACT:
A two-stroke engine includes an air channel for supplying substantially fuel-free combustion air and a mixture channel for supplying an air/fuel mixture. The air channel and the mixture channel connect the cylinder of the two-stroke engine to an air filter. A section of the mixture channel and a section of the air channel are guided in a common component. In order to prevent induction of mixture into the air channel, the length (a) of the mixture channel and the length (b) of the air channel are so matched to each other that the pressure wave in the air channel, which forms during operation, oscillates in phase with the pressure wave formed in the mixture channel. The length (a) of the mixture channel is matched to an optimal fuel induction via the fuel opening. A method for tuning the two-stroke engine provides that the length (a) of the mixture channel is matched to an optimal fuel discharge from the fuel opening in a first step and, in a second step, the length (b) of the air channel is so matched to the length (a) of the mixture channel that the pressure wave in the air channel and the pressure wave in the mixture channel oscillate in phase during operation of the two-stroke engine.

REFERENCES:
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patent: 6662766 (2003-12-01), Araki et al.
patent: 6889637 (2005-05-01), Rosskamp
patent: 6962132 (2005-11-01), Hoche et al.
patent: 2003/0106508 (2003-06-01), Rosskamp

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