Internal combustion engine with slot-type gas distribution

Details Internal combustion engine with slot-type gas distribution Internal combustion engine with slot-type gas distribution

1999-01-20

2000-09-19

McMahon, Marguerite

Internal-combustion engines

Multiple cylinder

Cylinders radiating

123 65V, F01L 712

Patent

active

061196401

ABSTRACT:
The present invention pertains to the field of engine construction and relates to internal combustion engines with scavenging and more precisely to two-stroke engines. At the beginning of the exhaust stroke, the exhaust gases are expelled from the engine cylinder through inlet and outlet ports, inlet and outlet passages and slide valves into an exhaust pipe. Scavenging ports are then uncovered by an upper edge of the piston and used to feed a fresh charge into the cylinder from the crank chamber while the cylinder cavity is scavenged. After expelling the exhaust gases from the cylinder cavity, the slide valves rotate to interrupt the communication between the cylinder cavity and exhaust manifold. Upon further rotation of the slide valves, the cylinder cavity is connected with the inlet pipe through the same gas-distribution organs used for the exhaust gas outlet, i.e. the inlet and outlet ports, the inlet and outlet passages and the slide valves. A fresh charge can thus be fed into the cylinder through all the ports it comprises, whereby the cylinder of a two-strike engine may be charged without any losses in the charges and with the appropriate preliminary compression ratio.

REFERENCES:
patent: 1867682 (1932-07-01), Sperry
patent: 3517651 (1970-06-01), Graybill
patent: 5081961 (1992-01-01), Paul et al.
patent: 5261359 (1993-11-01), Hull
patent: 5365899 (1994-11-01), Doragrip

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