scholarly journals Mechanical features of the combustion engine electric starting system

2018 ◽  
Vol 19 (6) ◽  
pp. 661-668
Author(s):  
Józef Pszczółkowski
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Diagnostic Process ◽  
Total Resistance ◽  
System Operation ◽  
Factors Influencing ◽  
Resistance Torque ◽  
The Moment ◽  
Engine Crankshaft

Engine crankshaft driving by the starter is characterised as a diagnostic process. The article discusses the working conditions of the electric starter when driving the engine crankshaft in terms of the equilibrium of the engine resistance torque and the moment of force generated by starting system. The resistance sources in the internal combustion engine were characterized and factors influencing them were discussed, its components and dependencies allowing for their determination were indicated. The variability of the engine resistance torque in the cycle of its operation as well as the variability of the torque and rotational speed of the crankshaft in the process of propelling the shaft are indicated. The stand and the methodology for testing the engine's internal combustion engine and the influence of the temperature and power of the starting system on registered start signals are presented. The cause and effect relationships of the engine resistance torque and the features – parameters of the starting system operation were indicated. It was shown that the values of signals recorded during the crankshaft driving have the features of engine diagnostic parameters in the aspect of the combustion chamber tightness and the total resistance of the internal combustion engine.

Multi-objective optimization design of engine crankshaft bearing

2016 ◽  
Vol 68 (1) ◽  
pp. 86-91 ◽  
Author(s):  
Jun Sun ◽  
Lei Shu ◽  
Xianhao Song ◽  
Guangsheng Liu ◽  
Feng Xu ◽  
...  
Keyword(s):  
Internal Combustion Engine ◽  
Power Loss ◽  
Optimization Design ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Multi Objective Optimization ◽  
Content Type ◽  
Multi Objective ◽  
Engine Crankshaft ◽  
Bearing System

Purpose – This paper aims to use the crankshaft-bearing system of a four-cylinder internal combustion engine as the studying object, and develop a multi-objective optimization design of the crankshaft-bearing. In the current optimization design of engine crankshaft-bearing, only the crankshaft-bearing was considered as the studying object. However, the corresponding relations of major structure dimensions exist between the crankshaft and the crankshaft-bearing in internal combustion engine, and there are the interaction effects between the crankshaft and the crankshaft-bearing during the operation of internal combustion engine. Design/methodology/approach – The crankshaft mass and the total frictional power loss of crankshaft-bearing s are selected as the objective functions in the optimization design of crankshaft-bearing. The Particle Swarm Optimization algorithm based on the idea of decreasing strategy of inertia weight with the exponential type is used in the optimization calculation. Findings – The total frictional power loss of crankshaft-bearing and the crankshaft mass are decreased, respectively, by 26.2 and 5.3 per cent by the multi-objective optimization design of crankshaft-bearing, which are more reasonable than the ones of single-objective optimization design in which only the crankshaft-bearing is considered as the studying object. Originality/value – The crankshaft-bearing system of a four-cylinder internal combustion engine is taken as the studying object, and the multi-objective optimization design of crankshaft-bearing based on the crankshaft-bearing system is developed. The results of this paper are helpful to the design of the crankshaft-bearing for engine. There is universal significance to research the multi-objective optimization design of crankshaft-bearing based on the crankshaft-bearing system. The research method of the multi-objective optimization design of crankshaft-bearing based on the crankshaft-bearing system can be used to the optimization design of the bearing in the shaft-bearing system of ordinary machinery.

Gas Driven Micro-Cogenerator Incorporating Heat Pump: Exergetic, Economic and Environmental Analysis

2006 ◽  
Author(s):  
Raffaello Possidente ◽  
Carlo Roselli ◽  
Maurizio Sasso ◽  
Sergio Sibilio
Keyword(s):  
Natural Gas ◽  
Internal Combustion Engine ◽  
Heat Pump ◽  
Environmental Analysis ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Operating Conditions ◽  
Heating And Cooling ◽  
Commercial Applications ◽  
The Moment

A natural gas-fired micro-cogenerator (MCHP) based on a reciprocating internal combustion engine that drives an electric heat pump (EHP), MCHP/EHP, has been analyzed. It allows a high degree of flexibility in terms of operating conditions, due to the possibility to use the two devices separately supplying electric and thermal (heating and cooling) energy (CCHT, Combined Cooling Heating and Power). The MCHP/EHP is a gas cooling technology that can contribute to optimize the natural gas and electricity consumptions in those countries where the HVAC systems are widespread. In particular, our interest was focused on micro-cogenerators (electric power ≤ 15 kW) at the moment available on the market, based on reciprocating internal combustion engine, that could have a great diffusion in the near future for domestic and light commercial applications. Starting by the results of an intense experimental activity an exergetic, economic and environmental analysis has been carried out to compare the proposed MCHP/EHP system to the conventional one based on separate “production”.

scholarly journals Study of the electric starter characteristics

2019 ◽  
Vol 24 (6) ◽  
pp. 240-247
Author(s):  
Józef Pszczółkowski
Keyword(s):  
Internal Combustion Engine ◽  
Power Supply ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Constant Load ◽  
Technical Condition ◽  
Stationary Conditions ◽  
Engine Crankshaft ◽  
Friction Brake ◽  
Operation Characteristics

The article describes the principle of operation of the electric starter of the starting system of the internal combustion engine. Basic processes and dependencies were described, and the characteristics of the starter's work were discussed. The station for the starter testing, allowing the examination of its characteristics and technical condition when powered by a battery and braking by means of an electro-spin and friction brake, was characterized. The station also allows testing the battery operation characteristics in the conditions of the starter power supply at its constant load. The results of tests of the functioning of the starting system and its components, the battery and the starter in the stationary conditions and while driving the engine crank-shaft are presented. The possibilities of using the crankshaft driving signals as diagnostic signals of the state of the battery, starter and combustion engine are indicated. The signals recorded while driving the engine crankshaft by the starter were discussed.

scholarly journals Determination of Differential Equations of Motion and Parameters of an Elastic Internal Combustion Engine Crankshaft

2016 ◽  
Vol 40 (2) ◽  
pp. 83-95
Author(s):  
Aleksandar Milašinović ◽  
Zdravko Milovanović ◽  
Darko Knežević ◽  
Indir Mujanić
Keyword(s):  
Differential Equations ◽  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Equations Of Motion ◽  
Internal Combustion ◽  
Engine Crankshaft

A Theoretical Investigation into the Porting of a Two-Cycle High Mean Effective Pressure Internal Combustion Engine

1947 ◽  
Vol 157 (1) ◽  
pp. 367-374
Author(s):  
George Parker
Keyword(s):  
Internal Combustion Engine ◽  
Theoretical Investigation ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Effective Pressure ◽  
Factors Influencing

The paper is an attempt to determine on paper the sizes of ports and their timing to attain a high mean effective pressure—that is, a mean effective pressure of the order of 200 lb. per sq. in. as is usual in present day high-duty four-cycle engines—in a two-cycle engine of the half-stroke sleeve type. In the course of this attempt the various unknown factors influencing the accuracy of the results are pointed out and comments are made about these factors.

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