초록

연구개발 결과
국내의 대기환경개선 기술을 이용하여 운행 중인 디젤엔진을 EURO-4 배기규제를 만족할 수 있도록 CNG 전환 주요 부품의 성능과 신뢰성을 개선하여 안정된 전환시스템 성능과 품질로 경쟁력을 확보할 수 있게 됨. 현재 해외로 수출되고 있는 중대형 디젤엔진용 CNG 전환 KIT의 상품성을 증대하여 해외시장에서 경쟁력 우위를 확보할 수 있을 것으로 기대 함.

Abstract ▼

Ⅱ. The Objective & Necessity of the Research
Most of Natural gas vehicles(NGV) in the world are converted from gasoline or diesel cars. It is expected that competition among manufacturers to supply the retrofit system with the increase of the conversion of these markets also become more intense.<

Ⅱ. The Objective & Necessity of the Research
Most of Natural gas vehicles(NGV) in the world are converted from gasoline or diesel cars. It is expected that competition among manufacturers to supply the retrofit system with the increase of the conversion of these markets also become more intense.
One of the features of the CNG engine is that it is large thermal load. This feature will affect the durability and reliability of the exhaust system and the piston. Therefore, consider themal load to prevent excessively increased to optimize the combustion. Since the conversion target most engines do not implement the EGR, techniques to lower the combustion temperature in Lean-Burn maching is essential. Furthermore, a system that comprehensively manages and apparatus for controlling the boost pressure and temperature of the fuel and apparatus for controlling the supply of fuel to ensure the emission of exhaust gas characteristic of a high level to ensure the power performance of the retrofit engine development is required.
In particular, Feedback control, due to ETC-control, ECU to control the ignition timing (Air / Fuel Ratio) air-fuel ratio system components that affect the most sensitive to the emission of exhaust gas and the performance of the engine in accordance with the control accuracy by improving the quality of the performance, it is intended to improve the product competitiveness of CNG Retofit KIT in overseas markets.
Ⅲ. Contents and Scope
The EURO 3 or level EURO 2 by engine, optimization and development of key core components necessary for converting to CNG dedicate engine to improve the responsiveness of the system, allowing the control, which is more sophisticated heavy duty diesel engine it was developed to convert to CNG dedicate engine diesel engine, to be able to meet the emission level of EURO4 level.
It was developed to meet the retrofit system the core components needed to retrofit the CNG engine, such as Fuel Temperature Control Module, Fuel Supply Control Module, Air-Fuel Control Device, and Boost Pressure Control Module. By then applied directly to the engine that has been converted, it advances the optimized development, it is possible to secure the engine output performance of more than 90% diesel engine existing ratio.
Further, it was confirmed the durability and reliability of the developed product by performing a durability rating of the engine target by applying the development part. The figure below shows the schematic diagram fuel supply and control system of CNG conversion system. The components within the dotted line have been developed by integrated with each other functions or added new function. As a result the performance of the module parts was improved than the original parts.
Ⅳ. Outcomes
Ⅴ. Business Application Based the Outcomes
Technology systems and components that have been developed in this challenge is expected to be able to replace the components of the CNG retrofit Kit Currently, our company have been exported to foreign countries. Thus, by being so as to further enhance the reliability and performance quality of the system and are expected to be able to improve the product competitiveness in overseas CNG conversion markets. The ECU was developed, is expected to expand the application fields such as industrial gas engines and gas power generation system of the car other than.

목차 Contents

• 표지 ... 1
• 제 출 문 ... 2
• 요 약 서 ... 3
• 요 약 문 ... 4
• SUMMARY ... 7
• 제 1 장 서 론 ... 11
• 제1절 연구개발과제의 개요 ... 11
• 1. 연구개발의 목적 및 필요성 ... 11
• 2. 연구개발대상 기술의 차별성 ... 11
• 제2절 연구개발의 국내외 현황 ... 12
• 1. 해외 시장 및 기술개발 동향 ... 12
• 제3절 연구개발의 내용 및 범위 ... 17
• 1. 연구개발의 최종목표 ... 17
• 2. 연도별 연구개발 목표 및 평가방법 ... 17
• 3. 연도별 추진체계 ... 18
• 제 2 장 연구개발 수행내용 및 결과 ... 19
• 제1절 연구개발 결과 및 토의 ... 19
• 1. 엔진개조 설계 및 제작 ... 19
• 2. CNG 전환 핵심부품 모듈화 개발 ... 26
• 3. 엔진성능 최적화 ... 37
• 4. 배출가스 성능 개발 ... 43
• 5. 신뢰성 확보를 위한 내구평가 ... 47
• 제2절 연구개발 결과 요약 ... 54
• 제 3 장 목표 달성도 및 관련분야 기여도 ... 56
• 제1절 연도별 연구개발목표의 달성도 ... 56
• 제2절 관련분야의 기술발전 기여도(환경적 성과 포함) ... 57
• 제 4 장 연구개발결과의 활용계획 등 ... 58
• 제1절 연구개발 결과의 활용계획 ... 58
• 제2절 연구개발과정에서 수집한 해외 과학기술정보 ... 59
• 제3절 연구개발결과의 보안등급 ... 59
• 제4절 NTIS에 등록한 연구시설·장비현황 ... 60
• 끝페이지 ... 62