A New Concept of Two-Stroke Gasoline Engine Applying Stratified-charge Auto-Ignition Combustion

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  • 成層自着火燃焼を適用した新しい二行程ガソリン機関コンセプト
  • セイソウジチャッカ ネンショウ オ テキヨウ シタ アタラシイ 2 コウテイ ガソリン キカン コンセプト

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A new concept of two-stroke gasoline engine applying stratified-charge auto-ignition has been designed and studied experimentally for improving fuel economy of vehicles. The engine concept adapts four different combustion modes according to the engine operating conditions, i.e., homogeneous-charge spark-ignition for the high-load range, homogeneous-charge auto-ignition for the medium - to low-load range, stratified-charge auto-ignition for the low-speed and low-load range, and stragified-charge spark-ignition for idling. The new concept two-stroke gasoline experimental engine made operating possible free from irregular combustion throughout the operating range in common use. In the case of a small motorcycle application, great improvements in fuel economy and exhaust emissions were estimated from the experimental reuslts.

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