Mixture formation of direct gasoline injection engine:: in-cylinder gas sampling using fast flame ionization detector |
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| Institution: | 166121. Technical Research Center, Mazda Motor Corporation, 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima 730-8670, Japan;1. Center for Injury Research and Policy, The Research Institute at Nationwide Children''s Hospital, 700 Children’s Drive, Columbus, OH 43205, USA;2. The Ohio State University College of Medicine, Department of Pediatrics, Columbus, OH, USA;3. Child Injury Prevention Alliance, Columbus, OH, USA |
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| Abstract: | Local mixture concentration near the spark plug of a direct gasoline injection engine was observed by a fast flame ionization detector. To ensure combustion stability in DISC (Direct Injection Stratified Charge) operation using conventional lean burn intake ports, the swirl ratio and the piston configuration were optimized. Swirl is needed to retain well-vaporized and stable mixture near the spark plug, especially under light load. Also, adequate volume in the piston cavity is required for trapping curved fuel spray. Measurement with a fast flame ionization detector was very effective for understanding the mixture features on DISC operation. |
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