Emission control system for a crankcase scavenged two-stroke eng

Details Emission control system for a crankcase scavenged two-stroke eng Emission control system for a crankcase scavenged two-stroke eng

1989-08-14

1990-06-12

Okonsky, David A.

Internal-combustion engines

Two-cycle

Rear compression

123 65R, 123403, 123339, F02B 3304

Patent

active

049323717

ABSTRACT:
An engine control system is disclosed for reducing the hydrocarbon content in exhaust gas from a crankcase scavenged, two-stroke engine in the operating range near idle, with light operator induced engine loading. As operator demand for engine output power is increased, the control system increases the fuel per cylinder delivered to the engine, while restricting the supplied mass of air per cylinder to a value less than or equal to that flowing at unloaded engine idle.

REFERENCES:
patent: 2332916 (1943-10-01), Johnson
patent: 4213431 (1980-07-01), Onishi
patent: 4768494 (1988-09-01), Hale
patent: 4825821 (1989-05-01), Baltz et al.
patent: 4840148 (1989-06-01), Staerzl
patent: 4850318 (1989-07-01), Torigai et al.

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