Optimum Combustion Chamber Geometry for a Compression Ignition Engine Retrofitted to Run Using Compressed Natural Gas (CNG)

Osman, Shahrul Azmir; Alimin, Ahmad Jais; Liong, V.S.

doi:10.4028/www.scientific.net/amm.315.552

Cited by 11 publications

(4 citation statements)

References 9 publications

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“…The reason is endothermic process responded prematurely in higher engine speed condition. Therefore, the temperature in the intake manifold is higher than mass and density of air, producing lower volumetric efficiency [6,17]. This process affected the engine performance [21,22].…”

Section: Engine Brake Power (Bp)mentioning

confidence: 99%

Effect of Performance and Exhaust Emission using Liquid Phase LPG Sequential Injection as an Alternative Fuel in Spark Ignition Engine

Tukiman

Osman

Fawzi

et al. 2018

IJIE

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LPG has a higher research octane number (RON) and low carbon to hydrogen ratio contains. Thus, LPG has prospects to gain more performance and reducing the exhaust emission in spark ignition (SI) engine. The objectives of this study are to identify the influence liquid phase LPG system tested on SI engine and investigate the performance and exhaust emission of LPG and gasoline. The contain LPG has 60% butane and 40% propane, according to Materials Safety Data Sheet (MSDS). The experiment was operating on a 1.6 Liter, 4 inline cylinders from a Proton Gen 2 (S4PH). The engine fuel delivery was equipped with Multiport Injection (MPI) system. Injectors LPG Liquid Sequential Injection (LSI) was mounted at close intake valve without disturbing gasoline injectors. To control the LPG injector system, the piggy-back system was installed as to emulate the stock Electronic Control Unit (ECU). The engine was tested via chassis dynamometer at steady state conditions to analyze the Brake Power (BP) and Brake Torque (BT) at a desired engine speed from 1500rpm to 4000rpm with increments of 500rpm. Meanwhile, the Throttle Position (TP) was varied at four conditions that were 25%, 50%, 75% and 100% for every single engine speed. The result of the performance showed liquid phase LPG increased BT and BP in the range of 3% to 7%, BSFC was reduced in the range 21% to 52%. The exhaust emission from carbon monoxide (CO) was decreased in the range of 2% to 19%, exhaust emission from a hydrocarbon (HC) was emitted with increment in the range of 40% to70% and nitrogen oxide (NOX) exhaust emission was elevated in an average of 60% in comparison with gasoline. The LPG LSI system is more effective than gasoline in Spark Ignition (SI) engine at lower engine speed (1500rpm to 2500rpm) due to low Brake Specific Fuel Consumption (BSFC) and exhaust emission.

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Section: Engine Brake Power (Bp)mentioning

confidence: 99%

Effect of Performance and Exhaust Emission using Liquid Phase LPG Sequential Injection as an Alternative Fuel in Spark Ignition Engine

Tukiman

Osman

Fawzi

et al. 2018

IJIE

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“…Correspondingly, positive ignition system [19] must be equipped to ensure the normal order of each cylinder firing to keep the engine working reliable. Compared with the gasoline engine, natural gas for the engine has its particularity [20][21][22][23]:…”

Section: Introductionmentioning

confidence: 99%

Study on the Method of Closed Loop Control for Gas Engine

Ge¹,

Xu²,

Li³

et al. 2015

IJSH

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With the increasing number of vehicles, society and environmental problems become much more seriously. Aiming at the serious problems, CNG engine, which has better emission performance, has been paid much more attention. However, the CNG engine also has its own disadvantages, such as engine power deterioration, great influence of different mixture ratios of the gas and air on the optimum ignition time of the engine, and so on. Therefore, adaptive control for the air-fuel ratio and ignition timing should be properly adjusted with the consideration of the engine power, economy and emissions. There are two methods of controlling the ignition timing: mechanical and electronic control. In this paper, we develop an adoptive control method based on electronic control. According to the verification, the method can improve the efficiency of the CNG engine. It can be shown the validity of the adoptive method.

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“…Natural gas or Compressed Natural Gas (CNG) has been one of the highly considered alternative fuels for both S.1 and C.I. engines [2]. CNG is the favorite for fossil fuel substitution, which is made up primarily of methane (CH4).…”

Section: Introductionmentioning

confidence: 99%

Performance and Emission Characteristics of Direct Injection C.I Engine Retrofitted with Mono-CNG System

Osman

Alimin

Ismail

et al. 2013

AMM

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Abstract. Diesel engines are widely used in logistics and haulage as vehicular prime movers. In the mechanized and fast-moving forward world of today, the consumption of petroleum products has become an important yardstick of a country's prosperity. This ever-increasing consumption has led the world to face the twin challenge of energy shortage and environmental deterioration. Natural gas has been one of the highly considered alternative fuels for both spark ignition (S.1) and compressed ignition (C.I.) engines. The advantages and benefits of CNG have made it the preferred choice as alternative fuel in the transportation sector. This present study focused on the effects of retrofitted direct injection C.I. engine with mono-CNG system to its performance and exhaust emissions. The engine speed was varied from 850 rpm to 2500 rpm, with load test conditions of ONm, 27.12Nm and 53.23Nm, using an engine dynamometer. Results indicated that CNG has the potential to provide better fuel consumption compared to diesel fuel. Meanwhile, the characteristics of exhaust gas emissions such as smoke opacity and C 0 2 gave promising results compared to CO, HC and NOX, for diesel combustion.

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Optimum Combustion Chamber Geometry for a Compression Ignition Engine Retrofitted to Run Using Compressed Natural Gas (CNG)

Cited by 11 publications

References 9 publications

Effect of Performance and Exhaust Emission using Liquid Phase LPG Sequential Injection as an Alternative Fuel in Spark Ignition Engine

Effect of Performance and Exhaust Emission using Liquid Phase LPG Sequential Injection as an Alternative Fuel in Spark Ignition Engine

Study on the Method of Closed Loop Control for Gas Engine

Performance and Emission Characteristics of Direct Injection C.I Engine Retrofitted with Mono-CNG System

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