PFI Dual Injection 엔진의 연료 분사각도와 분무각에따른 엔진 내부 유동 및 연료 거동 특성

Abstract

The PFI dual injection engine using one injector per an intake port was developed for solving the DISI enginecost problem. Excellent fuel atomization and targeting of the PFI dual injection engine made enhancement on the fuelefficiency and engine power. In order to develop a PFI dual injection engine, characteristics of the in-cylinder flow andfuel behavior with respect to fuel injection angle and cone angle of the PFI dual injection engine was investigated. Numerical calculation was conducted to analyze 3D unsteady in-cylinder flow and fuel behavior using STAR-CD. Theengine operating condition was 2,000rpm at WOT. As a result, the amount of intake air, evaporated fuel and fuel filmaccording to injection angle and cone angle were presented. The results were influenced by interaction between injectedfuel and intake port wall.