Effects of Temperature Distribution on Operational Parameters of a Spark Ignition Engine

2014 ◽  
Vol 659 ◽  
pp. 201-204 ◽  
Author(s):  
Mihai Alin Girbaci ◽  
Iulian Agape ◽  
Lidia Gaiginschi
Keyword(s):  
Thermal Analysis ◽  
Fuel Consumption ◽  
Combustion Engine ◽  
Operating Temperature ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Exhaust Gas ◽  
Operational Parameters ◽  
Gas Fuel ◽  
Effects Of Temperature

In recent years, automobile manufactures have been required to meet stringent fuel consumption specification. An important factor with regard to this problem is the operating temperature and its effect on functional parameters. In this paper, the effect of heat transfer on the various parameters such as inlet mixture temperature, compression ratio, exhaust gas, fuel consumption, lubrication oil of a spark ignition engine is studied. A number of studies have been reported which dealt with the thermal analysis of the structure of internal combustion engine. Because of the complexity of the problem, these analyses are approximate. Thus, to improve the accuracy of the results of the thermal analysis, we must work with experimental results prelevated from a 24 valve – 6 cylinder spark ignition engine. Included are comparisons between cooling characteristics of the water solutions with those of 100% ethylene glycol coolant.

scholarly journals The impact of ignition system damage on the emission of toxic substances in a spark-ignition internal combustion engine

2019 ◽  
Vol 179 (4) ◽  
pp. 86-92
Author(s):  
Mieczysław DZIUBIŃSKI ◽  
Ewa SIEMIONEK ◽  
Artur DROZD ◽  
Michał ŚCIRKA ◽  
Adam KISZCZAK ◽  
...  
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Spark Ignition ◽  
Operating Conditions ◽  
Spark Ignition Engine ◽  
Exhaust Gas ◽  
Toxic Substances ◽  
Ignition System ◽  
The Impact

The article discusses the impact of ignition system damage on the emission of toxic subcategories in a spark-ignition internal combustion engine. The aim of the work was to develop an analytical model of ignition system diagnostics, test performance and comparative analysis of the results of simulations and experiments. The model developed allows to analyse the basic parameters of the ignition system affecting the content of toxic substances in the exhaust. Experimental tests were carried out using the MAHA MGT5 exhaust gas analyser for four different combustion engines fueled with petrol at various operating conditions. During the tests, the content of toxic substances in the exhaust gas of a properly working engine and the engine working with damage to the ignition system were registered. The tests will be used to assess the impact of the damage of the spark-ignition engine on the emission of individual components of toxic fumes.

Semiclosed Cycle Internal Combustion Engine Utilizing Cryogenic Exhaust Solidification for Undersea Applications

1974 ◽  
Vol 96 (3) ◽  
pp. 1089-1096
Author(s):  
A. D. Rathsam
Keyword(s):  
Internal Combustion Engine ◽  
Storage Capacity ◽  
Combustion Engine ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Liquid Oxygen ◽  
Exhaust Gas ◽  
Closed Cycle ◽  
Oxygen Excess ◽  
And Performance

The paper describes the design, hardware, testing, and performance of a breadboard semi-closed cycle power system proposed for undersea operations by the Naval Undersea Center. The work was performed to prove the feasibility of the system. The system includes a commercially available spark-ignition engine, which operates on natural gas, oxygen, and recirculated exhaust gas, and a specially designed liquid oxygen/excess exhaust gas converter. The converter utilizes heat from dry, precooled exhaust gas to vaporize liquid oxygen and provide oxygen for the engine. While providing heat for liquid oxygen vaporization, the exhaust gas becomes frozen. The well-insulated converter is designed with ample storage capacity for both liquid oxygen and solidified exhaust. Nonoptimized hardware provided reliable airbreathing and nonairbreathing operation. Tests indicate that the approach is feasible for undersea applications.

scholarly journals Different Boosting Systems and their Control Strategies for a Spark Ignition Internal Combustion Engine

2016 ◽  
Vol 14 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Ondřej Bolehovský ◽  
Jan Macek
Keyword(s):  
Steady State ◽  
Gas Exchange ◽  
Combustion Engine ◽  
Control Strategies ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Exhaust Gas ◽  
Engine Exhaust ◽  
Partial Load ◽  
Boost Control

Abstract This research uses 1-D simulation in GT-Power for evaluation of boosting systems for a spark ignition engine. Exhaust gas driven (waste-gated turbocharger) and mechanical driven (Roots blower) boosting systems are assessed in both steady state and transient modes in terms of performance, efficiency, fuel consumption, drivability, energy distribution and other aspects that influence gas exchange phase. Moreover, different boost control strategies, particularly at partial load, are also evaluated. Results of the research are aimed at helping identify an optimal boosting system for standardized or real-world drive cycles.

EGR Effect On Performance of a Spark Ignition Engine Fueled with Blend of Methanol-Gasoline

2013 ◽  
Vol 1 (2) ◽  
pp. 110-92
Author(s):  
Miqdam Tariq Chaichan
Keyword(s):  
Fuel Consumption ◽  
Compression Ratio ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Specific Fuel Consumption ◽  
Exhaust Gas ◽  
Brake Specific Fuel Consumption ◽  
Test Results ◽  
Brake Thermal Efficiency ◽  
Spark Timing

This paper examines the results of performance of a single cylinder spark-   ignition engine fuelled with 20% methanol +80% gasoline (M20), compared to gasoline. The experiments were conducted at stoichiometric air–fuel ratio at wide open throttle and variable speed conditions, over the range of 1000 to 2600 rpm. The tests were conducted at higher useful compression ratio using optimum spark timings and adding recirculated exhaust gas with 20% to suction manifold. The test results show that the higher compression ratio for the tested gasoline was 7:1, 9.5:1 for M20 and 9:1 for M20 with added EGR. M20 at higher useful compression ratio (HUCR) and optimum spark timing (OST) characteristics are significantly different from gasoline. Within the tested speed range, M20 consistently produces higher brake thermal efficiency by about 6%. Also it resulted in approximately 3.06% lower brake specific fuel consumption compared with gasoline. Adding EGR to M20 caused reduction in HUCR and advancing the OST. This addition increased brake specific fuel consumption (BSFC), reduced brake thermal energy, volumetric efficiency and exhaust gas temperatures.

scholarly journals EXHAUST GAS RECIRCULATION EFFECT ON COMBUSTION AND EMITTED NOX IN A SPARK IGNITION ENGINE USING HIGH OCTANE NUMBER FUEL

2021 ◽  
Vol 21 (2) ◽  
pp. 80-95
Author(s):  
Noor Hassan ◽  
Adel M Saleh
Keyword(s):  
Fuel Consumption ◽  
Internal Combustion Engines ◽  
Spark Ignition ◽  
Environmental Pollutant ◽  
Volumetric Efficiency ◽  
Spark Ignition Engine ◽  
Specific Fuel Consumption ◽  
Exhaust Gas ◽  
The Impact ◽  
High Octane

Pollutants emitted from internal combustion engines cause significant environmental pollution, and the reduction of these pollutants is the goal of all. The deterioration of air quality is increasing year after year due to increasing the population and cars and low awareness of pollution reduction. In this study, the impact of recycling of exhaust gas in a spark ignition engine was tested on the NOx emitted from it, which is considered one of the most dangerous environmental pollutant. The results of the study showed that the brake specific fuel consumption increases by increasing the amount of the EGR interning the engine, also the brake thermal efficiency increases and the volumetric efficiency decreases with this increase. The NOx concentrations emitted are significantly reduced when high rates of EGR (15% and 20%) are added. The use of high octane fuel RON94.5 has helped to reduce the expected EGR damage, such as greater reduction in the specific fuel consumption, or a greater reduction in the volumetric efficiency.

scholarly journals Performance and Emission Characteristics of a Four Stroke Spark Ignition Engine with Recirculation of Hot and Cold Exhaust Gases

2018 ◽  
Vol 7 (4.5) ◽  
pp. 405
Author(s):  
Aritra Ganguly ◽  
Baidya Nath Murmu ◽  
Somnath Chakrabarti
Keyword(s):  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Specific Fuel Consumption ◽  
Intake Manifold ◽  
Emission Characteristics ◽  
Exhaust Gas ◽  
Brake Specific Fuel Consumption ◽  
Brake Thermal Efficiency

An experiment has been conducted on a four-stroke, four-cylinder spark ignition engine with and without recirculation of exhaust gas for different loads at a constant speed. Two cases were considered, the first in which 10% and later 20% of the exhaust gas was directly supplied to the intake manifold at a temperature of 820°C, while in the second case the same proportions of exhaust gas were cooled in a heat-exchanger to a temperature of 210°C before supply. Engine performance parameters like brake specific fuel consumption, brake thermal efficiency were evaluated under those conditions and compared with the same engine operating without recirculation. The corresponding emission characteristics of the engine were also measured using an exhaust gas analyzer which measured the amount of NOx, CO, CO2 and un-burnt HC. The performance and emissions characteristics of the engine obtained with hot and cold EGR were compared with reference to the same engine operating without EGR. The study revealed that the performance of the engine was better in terms of brake thermal efficiency and brake specific fuel consumption with cold EGR compared to hot EGR. However, the emissions of CO and HC were higher with cold EGR compared to that of hot EGR.   

scholarly journals Numerical study on the effects of intake charge on oxy-fuel combustion in a dual-injection spark ignition engine at economical oxygen-fuel ratios

2021 ◽  
pp. 146808742110222
Author(s):  
Xiang Li ◽  
Yiqiang Pei ◽  
Zhijun Peng ◽  
Tahmina Ajmal ◽  
Khaqan-Jim Rana ◽  
...  
Keyword(s):  
Combustion Engine ◽  
Numerical Study ◽  
Carbon Capture And Storage ◽  
Spark Ignition ◽  
Fuel Combustion ◽  
Spark Ignition Engine ◽  
Gasoline Direct Injection ◽  
Brake Mean Effective Pressure ◽  
Dual Injection ◽  
Injection Strategies

In order to decrease Carbon Dioxide (CO2) emissions, Oxy-Fuel Combustion (OFC) technology with Carbon Capture and Storage (CCS) is being developed in Internal Combustion Engine (ICE). In this article, a numerical study about the effects of intake charge on OFC was conducted in a dual-injection. Spark Ignition (SI) engine, with Gasoline Direct Injection (GDI), Port Fuel Injection (PFI) and P-G (50% PFI and 50% GDI) three injection strategies. The results show that under OFC with fixed Oxygen Mass Fraction (OMF) and intake temperature, the maximum Brake Mean Effective Pressure (BMEP) is each 5.671, 5.649 and 5.646 bar for GDI, P-G and PFI strategy, which leads to a considerable decrease compared to Conventional Air Combustion (CAC). [Formula: see text], [Formula: see text] and [Formula: see text] of PFI are the lowest among three injection strategies. With intake temperature increases from 298 to 378 K, the reduction of BMEP can be up to 12.68%, 12.92% and 12.75% for GDI, P-G and PFI, respectively. Meantime, there is an increase of about 3% in Brake Specific Fuel Consumption (BSFC) and Brake Specific Oxygen Consumption (BSOC). Increasing OMF can improve the performance of BMEP and BSFC, and the trend is more apparent under GDI strategy. Besides, an increasing tendency can be observed for cylinder pressure and in-cylinder temperature under all injection strategies with the increase of OMF.

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