Internal-combustion engines – Two-cycle – Whirl through piston-controlled ports
Patent
1989-06-26
1990-10-30
Okonsky, David A.
Internal-combustion engines
Two-cycle
Whirl through piston-controlled ports
123 65VA, 123 73C, F02B 7502
Patent
active
049661043
ABSTRACT:
A two-stroke engine comprises a cylinder which accommodates a piston and which has inlet and outlet ports, means for injecting fuel into the cylinder and control means for controlling the amount of fuel injected. The engine also includes a vent passage communicating with the interior of the cylinder and a first valve which is arranged to prevent communication between the interior of the cylinder and the vent passage and is connected to be opened and closed in synchronism with movement of the piston. Situated in the vent passage downstream of the first valve is a second throttling valve which is coupled to the control means and is arranged to be opened to an increasing extent to permit an increasing proportion of the inlet charge to be discharged as the control means is operated to reduce the amount of fuel which is injected into the cylinder thereby achieving homogeneous combustion at a constant air fuel ratio.
REFERENCES:
patent: 842392 (1907-01-01), Eckhard
patent: 1046738 (1912-12-01), Cross
patent: 1424965 (1922-08-01), Wells
patent: 2481901 (1949-09-01), Bracke
patent: 2503642 (1950-04-01), Tilliet
patent: 3815566 (1974-06-01), Staggs
patent: 4813395 (1989-03-01), Daly et al.
patent: 4838214 (1989-06-01), Barrett
Okonsky David A.
Ricardo Group PLC
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