Two-stroke cycle reciprocating internal combustion engine for sp

Details Two-stroke cycle reciprocating internal combustion engine for sp Two-stroke cycle reciprocating internal combustion engine for sp

1991-08-27

1992-09-08

Okonsky, David A.

Internal-combustion engines

Two-cycle

Whirl through piston-controlled ports

123 73PP, F02B 7502

Patent

active

051449196

ABSTRACT:
A two-stroke cycle reciprocating internal combustion engine for spark ignition and crankcase scavenging comprises a fuel injection nozzle and an arbitrarily operable throttle valve, which is provided in an air intake passage in upstream of leaf spring dampers, which are biased in a cloging sense. To provide such as engine which exhibits a fast response and produces an exhaust gas having a favorable composition also during an operation under a light load and in which even a fast opening of the throttle valve will not result in a formation of an undesirable fuel-air mixture, the leaf spring dampers are close to the throttle valve, which preferably consist of a rotary valve, a branch line is provided, which is designed to direct a flow of air under desirable aerodynamic conditions to the region adjacent to the outlet of the fuel injection nozzle, the throttle valve, which preferably consists of a rotary valve, is designed to open only said branch passage when the throttle valve is in a position between its idling position and a predetermined light load position, at least one leaf spring damper is associated with said branch line and the flow area of said branch line is only a fractional part of the flow area of the entire air intake system.

REFERENCES:
patent: 4768474 (1988-09-01), Fujimoto et al.
patent: 5027759 (1991-07-01), Luo
patent: 5033418 (1991-07-01), Maissant et al.
patent: 5060602 (1991-10-01), Maissant

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