Crankcase scavenged two-stroke internal combustion engine...

Details Crankcase scavenged two-stroke internal combustion engine... Crankcase scavenged two-stroke internal combustion engine...

2004-07-16

2009-12-22

Kamen, Noah (Department: 3741)

Internal-combustion engines

Two-cycle

Rear compression

C123S0730AA, C123S0730PP

Reexamination Certificate

active

07634980

ABSTRACT:
A crankcase scavenged two-stroke internal combustion engine (1) having an additional air supply (2) arranged to its transfer ducts (3), connecting a crankcase volume (4) and a transfer port (5). There is at least one recess (6, 24) in a piston (7) arranged below a piston ring (10, 11), and further there is a flow channel (12; 13; 14) arranged in the piston or in a cylinder wall (29) of the engine cylinder (9), and the recess is arranged to register with the transfer port and the flow channel for certain first piston positions, i.e. to create a communication between the transfer port/s and the crankcase volume.

REFERENCES:
patent: 6895910 (2005-05-01), Geyer et al.
patent: 6945203 (2005-09-01), Amend et al.
patent: 2002/0043227 (2002-04-01), Carlsson et al.
patent: 2002/0112681 (2002-08-01), Rosskamp et al.
patent: 2003/0029398 (2003-02-01), Andersson et al.
patent: 2003/0217710 (2003-11-01), Geyer et al.
patent: 1 006 267 (2000-06-01), None
patent: 513466 (2000-09-01), None

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