Two-stroke engine

Details Two-stroke engine Two-stroke engine

2005-12-20

2005-12-20

Kwon, John T. (Department: 3747)

Internal-combustion engines

Two-cycle

Rear compression

C123S0650VD

Reexamination Certificate

active

06976458

ABSTRACT:
A two-stroke engine (1) has a combustion chamber (3) configured in a cylinder (2). The combustion chamber (3) is delimited by a reciprocating piston (5) and drives a crankshaft (7) which is rotatably journalled in a crankcase (4). The two-stroke engine (1) has an outlet (10) out of the combustion chamber (3) and at least one transfer channel (12, 15) which connects the crankcase (4) to the combustion chamber (3) at pregiven piston positions. The transfer channels (12, 15) open with transfer windows (13, 16) into the combustion chamber (3). To obtain a good start and good idle performance and low exhaust-gas values, an ancillary channel (14) is provided which is connected into the combustion chamber (3) at one end (37) and into the transfer channel (15) with the other end (36). During operation, the ancillary channel (14) opens into the combustion chamber (3) during the downward stroke of the piston (5) while the transfer window (16) to the combustion chamber (3) is still closed.

REFERENCES:
patent: 6513466 (2003-02-01), Bignion et al.
patent: 6578562 (2003-06-01), Aljabari et al.
patent: 6598568 (2003-07-01), Rosskamp et al.
patent: 2002/0043227 (2002-04-01), Carlsson et al.
patent: 2002/0073943 (2002-06-01), Geyer et al.
patent: 2002/0112681 (2002-08-01), Rosskamp et al.
patent: 26 24 249 (1976-12-01), None

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