소형 가솔린 엔진의 VVT적용을 위한 엔진 성능 기초 연구 = A Preliminary Study on Engine Performance for the application VVT system in Small Gasoline Engine

다국어 초록 (Multilingual Abstract)

Due to wider operation engine speed range, from 3000 to 12,000 rpm, in small gasoline engine, EFI(Electronic fuel injection) with ECU and VVT (Variable Valve Timing) systems are necessary in order to increase engine performance. In Korea, both system are already adopted in automotive engines but are not in the engine for motorcycle. In this study, to check the applicability of VVT, various cams with different valve timings are tested in small single cylinder gasoline engines with EFI system. In oder to optimize valve timing with engine speed, intake valve opening timing is changed by every 5 CA deg with commercial cam. Compared to conventional valve timing in 4 valve SOHC single cylinder engine, 12% increase of engine power was obtained at low engine speed with 15° advanced IVO(intake valve opening) and 7% increase at high engine speed with 5° retarded IVO.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 실험 장치 및 방법
• 3. 실험 및 고찰
• 4. 결론
• 후기
• References