Experimental test of a new compressed natural gas engine with direct injection

M. A. Kalam, H. H. Masjuki, T.m. Indra Mahlia, M. A. Fuad, Ku Halim, A. Ishak, M. Khair, A. Yusoff, A. Shahrir

Research output: Contribution to conferencePaper

13 Citations (Scopus)

Abstract

This paper presents experimental test results of a new compressed natural gas direct injection (CNG-DI) engine that has been developed from modification of a multi cylinder gasoline port injection (PI) engine. The major modifications done are (1) the injection system has been modified to gas direct injection using new high pressure gas injectors, (2) compression ratio has been changed from 10 to 14 through modification of piston and cylinder head, and (3) new spark plugs with long edge were used to ignite the CNG fuel. The CNG pressure at common rail was kept at 20 bar to be injected into engine cylinder. The engine has been operated with full throttle conditions to compare all the results with original base engine such as gasoline port injection engine and the CNG bi-fuel engine where the base engine has been converted to bi-fuel injection system to be operated with gasoline and CNG fuels. Hence, it can be mentioned that the original gasoline port injection engine has been modified to CNG bi-fuel and CNG-DI systems. The bi-fuel injection was developed using a gas conversion kit with gas port injection injectors. The test results obtained from CNG fuel using two different systems (i.e. bi-fuel and DI) will be investigated and compared with original gasoline engine. The test was conducted with computer controlled dynamometer to measure brake power, specific fuel consumption (SFC), exhaust emissions such as carbon monoxide (CO), oxides of nitrogen (NOx), and unburned hydrocarbon (HC). The objective of this investigation is to compare the test results between "CNG-DI", with "CNG-BI" and "gasoline - PI" engines with the same displacement volume. It was found that the CNG-DI engine produces 4% higher brake power at 6000 rpm as compared to original gasoline fueled engine. The CNG-BI engine produces maximum power of 57 kW at 5500 rpm which is 23% lower than CNG-DI engine's peak power (at 6000 rpm). The average BSFC of CNG-DI engine was 0.28% and 8% lower than gasoline-PI and CNG-BI engines respectively. The CNG-DI engine reduces 50% NOx emission as compared to base engine. However, the CNG-DI engine produces higher HC and CO emissions as compared to base engine by 34% and 48% respectively. The results of this experiment will be used for further improvement of the CNG-DI engine as well as to develop a new CNG-DI car.

Original languageEnglish
DOIs
Publication statusPublished - 01 Dec 2009
EventPowertrains, Fuels and Lubricants Meeting, SFL 2009 - Florence, Italy
Duration: 15 Jun 200915 Jun 2009

Other

OtherPowertrains, Fuels and Lubricants Meeting, SFL 2009
CountryItaly
CityFlorence
Period15/06/0915/06/09

Fingerprint

Compressed natural gas
Gas engines
Direct injection
Engines
Gasoline
Fuel injection
Engine cylinders
Gases
Brakes
Carbon monoxide
Hydrocarbons

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

Cite this

Kalam, M. A., Masjuki, H. H., Mahlia, T. M. I., Fuad, M. A., Halim, K., Ishak, A., ... Shahrir, A. (2009). Experimental test of a new compressed natural gas engine with direct injection. Paper presented at Powertrains, Fuels and Lubricants Meeting, SFL 2009, Florence, Italy. https://doi.org/10.4271/2009-01-1967
Kalam, M. A. ; Masjuki, H. H. ; Mahlia, T.m. Indra ; Fuad, M. A. ; Halim, Ku ; Ishak, A. ; Khair, M. ; Yusoff, A. ; Shahrir, A. / Experimental test of a new compressed natural gas engine with direct injection. Paper presented at Powertrains, Fuels and Lubricants Meeting, SFL 2009, Florence, Italy.
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title = "Experimental test of a new compressed natural gas engine with direct injection",
abstract = "This paper presents experimental test results of a new compressed natural gas direct injection (CNG-DI) engine that has been developed from modification of a multi cylinder gasoline port injection (PI) engine. The major modifications done are (1) the injection system has been modified to gas direct injection using new high pressure gas injectors, (2) compression ratio has been changed from 10 to 14 through modification of piston and cylinder head, and (3) new spark plugs with long edge were used to ignite the CNG fuel. The CNG pressure at common rail was kept at 20 bar to be injected into engine cylinder. The engine has been operated with full throttle conditions to compare all the results with original base engine such as gasoline port injection engine and the CNG bi-fuel engine where the base engine has been converted to bi-fuel injection system to be operated with gasoline and CNG fuels. Hence, it can be mentioned that the original gasoline port injection engine has been modified to CNG bi-fuel and CNG-DI systems. The bi-fuel injection was developed using a gas conversion kit with gas port injection injectors. The test results obtained from CNG fuel using two different systems (i.e. bi-fuel and DI) will be investigated and compared with original gasoline engine. The test was conducted with computer controlled dynamometer to measure brake power, specific fuel consumption (SFC), exhaust emissions such as carbon monoxide (CO), oxides of nitrogen (NOx), and unburned hydrocarbon (HC). The objective of this investigation is to compare the test results between {"}CNG-DI{"}, with {"}CNG-BI{"} and {"}gasoline - PI{"} engines with the same displacement volume. It was found that the CNG-DI engine produces 4{\%} higher brake power at 6000 rpm as compared to original gasoline fueled engine. The CNG-BI engine produces maximum power of 57 kW at 5500 rpm which is 23{\%} lower than CNG-DI engine's peak power (at 6000 rpm). The average BSFC of CNG-DI engine was 0.28{\%} and 8{\%} lower than gasoline-PI and CNG-BI engines respectively. The CNG-DI engine reduces 50{\%} NOx emission as compared to base engine. However, the CNG-DI engine produces higher HC and CO emissions as compared to base engine by 34{\%} and 48{\%} respectively. The results of this experiment will be used for further improvement of the CNG-DI engine as well as to develop a new CNG-DI car.",
author = "Kalam, {M. A.} and Masjuki, {H. H.} and Mahlia, {T.m. Indra} and Fuad, {M. A.} and Ku Halim and A. Ishak and M. Khair and A. Yusoff and A. Shahrir",
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Kalam, MA, Masjuki, HH, Mahlia, TMI, Fuad, MA, Halim, K, Ishak, A, Khair, M, Yusoff, A & Shahrir, A 2009, 'Experimental test of a new compressed natural gas engine with direct injection' Paper presented at Powertrains, Fuels and Lubricants Meeting, SFL 2009, Florence, Italy, 15/06/09 - 15/06/09, . https://doi.org/10.4271/2009-01-1967

Experimental test of a new compressed natural gas engine with direct injection. / Kalam, M. A.; Masjuki, H. H.; Mahlia, T.m. Indra; Fuad, M. A.; Halim, Ku; Ishak, A.; Khair, M.; Yusoff, A.; Shahrir, A.

2009. Paper presented at Powertrains, Fuels and Lubricants Meeting, SFL 2009, Florence, Italy.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Experimental test of a new compressed natural gas engine with direct injection

AU - Kalam, M. A.

AU - Masjuki, H. H.

AU - Mahlia, T.m. Indra

AU - Fuad, M. A.

AU - Halim, Ku

AU - Ishak, A.

AU - Khair, M.

AU - Yusoff, A.

AU - Shahrir, A.

PY - 2009/12/1

Y1 - 2009/12/1

N2 - This paper presents experimental test results of a new compressed natural gas direct injection (CNG-DI) engine that has been developed from modification of a multi cylinder gasoline port injection (PI) engine. The major modifications done are (1) the injection system has been modified to gas direct injection using new high pressure gas injectors, (2) compression ratio has been changed from 10 to 14 through modification of piston and cylinder head, and (3) new spark plugs with long edge were used to ignite the CNG fuel. The CNG pressure at common rail was kept at 20 bar to be injected into engine cylinder. The engine has been operated with full throttle conditions to compare all the results with original base engine such as gasoline port injection engine and the CNG bi-fuel engine where the base engine has been converted to bi-fuel injection system to be operated with gasoline and CNG fuels. Hence, it can be mentioned that the original gasoline port injection engine has been modified to CNG bi-fuel and CNG-DI systems. The bi-fuel injection was developed using a gas conversion kit with gas port injection injectors. The test results obtained from CNG fuel using two different systems (i.e. bi-fuel and DI) will be investigated and compared with original gasoline engine. The test was conducted with computer controlled dynamometer to measure brake power, specific fuel consumption (SFC), exhaust emissions such as carbon monoxide (CO), oxides of nitrogen (NOx), and unburned hydrocarbon (HC). The objective of this investigation is to compare the test results between "CNG-DI", with "CNG-BI" and "gasoline - PI" engines with the same displacement volume. It was found that the CNG-DI engine produces 4% higher brake power at 6000 rpm as compared to original gasoline fueled engine. The CNG-BI engine produces maximum power of 57 kW at 5500 rpm which is 23% lower than CNG-DI engine's peak power (at 6000 rpm). The average BSFC of CNG-DI engine was 0.28% and 8% lower than gasoline-PI and CNG-BI engines respectively. The CNG-DI engine reduces 50% NOx emission as compared to base engine. However, the CNG-DI engine produces higher HC and CO emissions as compared to base engine by 34% and 48% respectively. The results of this experiment will be used for further improvement of the CNG-DI engine as well as to develop a new CNG-DI car.

AB - This paper presents experimental test results of a new compressed natural gas direct injection (CNG-DI) engine that has been developed from modification of a multi cylinder gasoline port injection (PI) engine. The major modifications done are (1) the injection system has been modified to gas direct injection using new high pressure gas injectors, (2) compression ratio has been changed from 10 to 14 through modification of piston and cylinder head, and (3) new spark plugs with long edge were used to ignite the CNG fuel. The CNG pressure at common rail was kept at 20 bar to be injected into engine cylinder. The engine has been operated with full throttle conditions to compare all the results with original base engine such as gasoline port injection engine and the CNG bi-fuel engine where the base engine has been converted to bi-fuel injection system to be operated with gasoline and CNG fuels. Hence, it can be mentioned that the original gasoline port injection engine has been modified to CNG bi-fuel and CNG-DI systems. The bi-fuel injection was developed using a gas conversion kit with gas port injection injectors. The test results obtained from CNG fuel using two different systems (i.e. bi-fuel and DI) will be investigated and compared with original gasoline engine. The test was conducted with computer controlled dynamometer to measure brake power, specific fuel consumption (SFC), exhaust emissions such as carbon monoxide (CO), oxides of nitrogen (NOx), and unburned hydrocarbon (HC). The objective of this investigation is to compare the test results between "CNG-DI", with "CNG-BI" and "gasoline - PI" engines with the same displacement volume. It was found that the CNG-DI engine produces 4% higher brake power at 6000 rpm as compared to original gasoline fueled engine. The CNG-BI engine produces maximum power of 57 kW at 5500 rpm which is 23% lower than CNG-DI engine's peak power (at 6000 rpm). The average BSFC of CNG-DI engine was 0.28% and 8% lower than gasoline-PI and CNG-BI engines respectively. The CNG-DI engine reduces 50% NOx emission as compared to base engine. However, the CNG-DI engine produces higher HC and CO emissions as compared to base engine by 34% and 48% respectively. The results of this experiment will be used for further improvement of the CNG-DI engine as well as to develop a new CNG-DI car.

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Kalam MA, Masjuki HH, Mahlia TMI, Fuad MA, Halim K, Ishak A et al. Experimental test of a new compressed natural gas engine with direct injection. 2009. Paper presented at Powertrains, Fuels and Lubricants Meeting, SFL 2009, Florence, Italy. https://doi.org/10.4271/2009-01-1967