| 摘要 |
PROBLEM TO BE SOLVED: To propose a fuel injection control method for a two-cycle cylinder direct injection engine that can purify exhaust gas by keeping idling stable. SOLUTION: Fuel injecting in the low speed rotation region of the engine is started immediately after a scavenging port is closed, and the injection of all the fuel is completed while an exhaust port is open. In the medium-high speed region of the engine, fuel injection is performed also in a other period than that from the closing timing of the scavenging port to the closing timing of the exhaust port, thus injecting the fuel in the quantity demanded by the engine. During the high speed rotation of the engine, the injection start timing of fuel is advanced following the increase of the rotating speed, and finally the injection start timing of fuel is advanced up to the opening timing of the scavenging port or up to the timing immediately after the opening timing.
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