scholarly journals Temperature, Heat Distribution and Performance Analysis in a Variable Compression Ratio Internal Combustion Engine

2020 ◽  
Vol 8 (5) ◽  
pp. 4825-4829
Keyword(s):  
Heat Loss ◽  
Compression Ratio ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Mechanical Energy ◽  
Cooling Water ◽  
Internal Combustion ◽  
Heat Distribution ◽  
Variable Compression Ratio ◽  
Variable Compression

The internal combustion engines are also known as heat engines because of the utilization of heat energy of the fuel to convert it in to mechanical energy of the engine which finally runs the vehicle. Therefore, it is necessary to examine the generation and utilization of heat inside and outside the engine. For the above mentioned purpose, a variable compression ratio engine was used to perform experiment. The heat distribution of the used engine was investigated to recognize the heat loss areas from the engine. The experiments were performed by changing compression ratio from 15 to 21 and an optimum compression ratio was found. The experiments are further extended to find an optimum load value at standard compression ratio of the engine. The analysis was performed by using various factor of heat utilization such as heat supplied by fuel, heat equivalent to brake power, heat loss to exhaust gases, heat loss to engine cooling water and heat unaccounted. The proposed research will be useful to overcome the challenges during selection of compression ratio for design of an engine in industries.

scholarly journals Unaccounted Heat Distribution in a Variable Compression Ratio Internal Combustion Engine

2019 ◽  
Vol 8 (6) ◽  
pp. 2149-2155
Keyword(s):  
Fuel Consumption ◽  
Compression Ratio ◽  
Combustion Engine ◽  
Specific Fuel Consumption ◽  
Quantitative Relation ◽  
Heat Distribution ◽  
Chemical Action ◽  
Variable Compression Ratio ◽  
Variable Compression Ratio Engine ◽  
Variable Compression

The compression ratio on heat distribution in an exceedingly variable compression ratio engine. The compression ratio powerfully affects the operating method and provides an exceptional degree of management over engine performance. Variable Compression quantitative relation (V.C.R) engine check rig is employed to see the result of Compression ratio (C.R) on the performance and emissions of the engine and also the distribution of warmth during a variable compression ratio engine. The performance frequency parameters like efficiencies, power adopted, and specific fuel consumption square measure determined. Further, combustion development is additionally discovered through this work, we will notice the optimum compression ratio that the simplest performance is feasible. So as to search out optimum compression ratio, experiments were dispensed on one cylinder four stroke variable compression ratio diesel motor. Tests were dispensed at compression ratios of fifteen, 16, 17.5, 19 and 21 at totally different masses the performance characteristics of engine like Brake power (BP), Brake Thermal potency (BTE), Brake Specific Fuel Consumption (BSFC). Results show a major improved performance at a compression ratio twenty one. The compression ratios lesser than 21 showed an increase in brake thermal potency, come by fuel consumption. The warmth is that the governing issue that operates whole engine and turn out power. Compression ratio between 19 to 21 provides optimum results in distribution of unaccounted heat also improves thermal performance of engine, Each fuel within the world is employed to supply certain quantity of warmth by either mechanical or chemical action. The heat is created by fuel is employed to reciprocate piston within combustion chamber and this reciprocatory motion is regenerate to movement power to regulator by exploitation crank and rod mechanism.

scholarly journals Determination of Combustion Process Model Parameters in Diesel Engine with Variable Compression Ratio

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Saša Milojević ◽  
Radivoje Pešić
Keyword(s):  
Diesel Engine ◽  
Compression Ratio ◽  
Process Model ◽  
Internal Combustion Engines ◽  
Combustion Process ◽  
Exhaust Emission ◽  
Model Parameters ◽  
Connecting Rod ◽  
Variable Compression Ratio ◽  
Variable Compression

Compression ratio has very important influence on fuel economy, emission, and other performances of internal combustion engines. Application of variable compression ratio in diesel engines has a number of benefits, such as limiting maximal in cylinder pressure and extended field of the optimal operating regime to the prime requirements: consumption, power, emission, noise, and multifuel capability. The manuscript presents also the patented mechanism for automatic change engine compression ratio with two-piece connecting rod. Beside experimental research, modeling of combustion process of diesel engine with direct injection has been performed. The basic problem, selection of the parameters in double Vibe function used for modeling the diesel engine combustion process, also performed for different compression ratio values. The optimal compression ratio value was defined regarding minimal fuel consumption and exhaust emission. For this purpose the test bench in the Laboratory for Engines of the Faculty of Engineering, University of Kragujevac, is brought into operation.

Calculation of Exhaust Gas Heat Produce for Ron 95, Ron97 and Vpower Racing Base Fuels use in Internal Combustion Engines

2017 ◽  
Vol 9 (3) ◽  
Author(s):  
I.B. Lias ◽  
H.B. Sharudin ◽  
M.H.B. Ismail ◽  
A.M.I.B. Mamat
Keyword(s):  
Heat Transfer ◽  
Heat Loss ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Exhaust System ◽  
Internal Combustion ◽  
Exhaust Gas ◽  
Combustion Engines ◽  
Exhaust Temperature ◽  
Different Types

The purpose of this study is to identify and analyse the calculation of exhaust gas heat produce (EGHP) in internal combustion engine (ICE) based on three types of fuel used specifically Petrol Ron 95, Petrol Ron 97 and Vpower racing base. The experimental test rig has used 1.6 CamPro Proton engine with 1561cc capacity and dynamometer. The calculation has used the basic formula of heat transfer equation and heat loss through the exhaust that included the mass flow rate of exhaust gas, specific heat of exhaust gas and temperature gradient. The exhaust temperature of ICE is generally in range from 400C to 600C and exhaust gas heat transfer affects the emissions burn-up in the exhaust system. This contributes significantly to the engine requirement. The experimental data was statistically analysed to identify the unknown parameter. High correlation of data variables can be determined based on the heat loss produced or EGHP. This also has significance by using different types of fuel in ICE.

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