Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
권호 표지
DOI QR코드

DOI QR Code

Study on Full Load Operation Characteristics and Thermal Efficiency of 1.4L Turbo CNG SI Engine

1.4L급 터보 CNG SI엔진의 전부하 운전 특성 및 열효율에 대한 연구

  • Bae, Jong-Won (Dept. of Mechanical Engineering, Graduate School, Soongsil University) ;
  • Park, Cheol-Woong (Dept. of Engine Research, Korea Institute of Machinery and Material) ;
  • Lee, Jeong-Woo (Dept. of Engine Research, Korea Institute of Machinery and Material) ;
  • Kim, Yong-Rae (Dept. of Engine Research, Korea Institute of Machinery and Material) ;
  • Kim, Chang-Gi (Dept. of Engine Research, Korea Institute of Machinery and Material) ;
  • Lee, Sun-Youp (Dept. of Engine Research, Korea Institute of Machinery and Material) ;
  • Lee, Jin-Wook (School of Mechanical Engineering, Soongsil University)
  • 배종원 (숭실대학교 대학원 기계공학과) ;
  • 박철웅 (한국기계연구원 그린동력연구실) ;
  • 이정우 (한국기계연구원 그린동력연구실) ;
  • 김용래 (한국기계연구원 그린동력연구실) ;
  • 김창기 (한국기계연구원 그린동력연구실) ;
  • 이선엽 (한국기계연구원 그린동력연구실) ;
  • 이진욱 (숭실대학교 기계공학과)
  • Received : 2018.10.12
  • Accepted : 2018.11.29
  • Published : 2018.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

Natural gas is attracting attention as an alternative to existing fossil fuels. Natural gas has a high octane number. Therefore, knocking does not occur even if the compression ratio is increased, so that the thermal efficiency and the output can be improved. And it is relatively easy to apply the natural gas supply system to the internal combustion engine hardware system. In this study, a gasoline direct injection turbo engine was converted into a natural gas port injection type turbo engine. Therefore, the combustion and performance of the engine are measured and compared comprehensively in the region where the turbo operates.

최근 탈석유 에너지 이행의 목표가 분명해지는 가운데 천연가스가 가교연료로서 주목받고 있다. 천연가스는 옥탄가가 높아 압축비를 높여도 노킹이 일어나지 않기 때문에 열효율과 출력을 두루 향상시킬 수 있을 뿐 아니라 기존 내연기관 하드웨어 시스템에 천연가스 공급 시스템 적용을 비교적 용이하게 할 수 있다. 본 연구에서는 승용 가솔린 직분사 터보 엔진을 천연가스 포트분사식 터보 엔진으로 개조하여 터보가 작동되는 운전 영역에서 대상 엔진의 연소 및 성능을 종합적으로 측정 및 비교하였다.

Keywords

GSGSBE_2018_v22n6_34_f0001.png 이미지

Fig. 1. Schemetic of experimental setup.

GSGSBE_2018_v22n6_34_f0002.png 이미지

Fig. 2. Torque distribution by engine speed.

GSGSBE_2018_v22n6_34_f0003.png 이미지

Fig. 3. Comparison of thermal efficiency by fuel.

GSGSBE_2018_v22n6_34_f0004.png 이미지

Fig. 4. Comparison of brake specific fuel consumption by fuel.

GSGSBE_2018_v22n6_34_f0005.png 이미지

Fig. 5. Exhaust temperature comparison by fuel.

GSGSBE_2018_v22n6_34_f0006.png 이미지

Fig. 6. Lambda comparison by fuel.

GSGSBE_2018_v22n6_34_f0007.png 이미지

Fig. 7. Comparison of Combustion Pressure and Heat Release Rate by Fuel.

GSGSBE_2018_v22n6_34_f0008.png 이미지

Fig. 8. PV diagram by Fuel.

Table 1. Specifications of the spark-ignited en-gine.

GSGSBE_2018_v22n6_34_t0001.png 이미지

Table 2. Comparison of fuel characteristics

GSGSBE_2018_v22n6_34_t0002.png 이미지

Table 3. Engine operating condition

GSGSBE_2018_v22n6_34_t0003.png 이미지

References

  1. J. M. Song, "Energy Transition and International Natural Gas Order: Shale Gas and U.S. Hegemony of Gas", Journal of Korean Politics, Vol.22 No.2, pp. 275-301, (2013)
  2. C. G. Kim, S. Y. Lee, Y. R. Kim, and C. W. Park, "Current Trend in Natural Gas Vehicle Technology in Korea", AUTO JOURNAL, 39(4), 33-38, (2017)
  3. Yuji Yamamoto and Katsuhiko Sato, "Study of Combustion Characteristics of Compressed Natural Gas as Automotive Fuel", SAE 940761, (1994)
  4. G. C. Kim, O. S. Kwon, Y. D. Pho, C. J. Koh, and Y. J. Lee, "Development of Conversion Technology to CNG Dedicated Engine for Small Van ", KOSEE, 237-242, (2000)
  5. K. Kato, K. Igarashi, M. Masuda, K. Otsubo, A. Yasuda, and K. Takeda, "Development of engine for natural gas vehicle" SAE Technical Paper, 1999-01-0574, (1999)
  6. C. H. Chang, K. Min. and C. L. Myung, and K. J. Yoon, "Development of Hyundai MPI CNGEngine", KSAE, 546-554, (1993)
  7. C. W. Park, C. G. Kim, Y. Choi, S. Y. Lee, S. W. Lee, U. H. Yi, and J. H. Lee, "Development of Hydrogen-Compressed Natural Gas Blend Engine for Heavy Duty Vehicles", FISITA 2016, F2016-ESYC-018, (2016)
  8. J. Y. Kim, J. S. Lee, S. S. Chung, and J. Y. Ha, "Combustion Characteristic of the Dedicated CNG engine", KSAE, 61-66, (2001)
  9. C. G. Kim, and C. W. Park, "A Study on Performance Characteristics for a CNG Regulators of Automotive Vehicle", KIGAS, 11(4), 12-16, (2007)