Development of Combustion System for New 2.0-Liter Inline 4-Cylinder Turbocharged Direct-Injection Gasoline Engine

新型 2.0L 直列 4 気筒ガソリン直噴過給エンジンの燃焼システム開発

D-4S that combines direct and port fuel injection was made it adapted to turbocharged engine. Combustion speed was raised to correspond to high “Pme” of turbocharged engine by high tumble ratio. Simultaneously, piston which specialized in catalyst heating was improved to raise turbulence intensity and direct injection spray pattern was optimized. In addition, multiple direct injection strategy enabled optimization of mixture according to engine speed or load and decreased minimum direct injection quantity by detection the timing of valve open. This system reduced number of PM and oil dilution, furthermore achieved to improve 3% engine power and 2% fuel consumption.直噴とポートの両方のインジェクタを備えたD-4S過給エンジンにおいて,噴射システムを開発.最適な混合気形成を狙い,ピストン頂面形状および直噴の噴霧レイアウトの最適化,ポート噴射と組合せた直噴マルチ噴射制御の構築を実施.本制御は,直噴インジェクタの開弁時期を電流により検出し,噴射精度を向上させて実現.

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  • Accession Number: 01673403
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: May 15 2018 3:03PM