IMPROVING THE ENERGY EFFICIENCY OF AN AUTONOMOUS SOURCE OF ELECTRIC ENERGY BY REGULATING THE GAS DISTRIBUTION OF AN INTERNAL COMBUSTION ENGINE

The efficiency of an agricultural car or tractor depends on the characteristics of the engine determined by the gas distribution mechanism (GRM). Traditional timing with fixed valve timing does not provide high-quality gas exchange at all engine operating modes. The aim of the work is to improve the characteristics of the engine by using the hydraulic drive of the timing valves. The drive allows you to turn off individual valves, set the moments of their opening and closing in an arbitrary way, provide several triggering of the internal combustion engine valves during the operating cycle. The drive is controlled by an electronic control unit (ECU). The advantage of the drive is its ease of integration into the internal combustion engine. The hydraulic drive ensures that the timing valves are lifted to a height of about 14 mm. The law of displacement of the valve, revealed experimentally, is close to trapezoidal. The use of a hydraulic valve drive has a positive effect on the "time-section" factor in the area of low and medium crankshaft rotational speeds. The increment of the factor "time-section" is due to the significant speeds of opening and closing the valves. Due to the peculiarities of the kinematic characteristics of the movement of the valves when using a hydraulic drive for their movement, the use of serial phases of gas distribution of the engine is impractical. Numerical modeling of the operation of the internal combustion engine determined the regularity of the change in valve timing from the high-speed operating mode of the engine. Optimization criterion is the achievement of maximum engine power. When choosing the valve timing, the possibility of meeting the intake and exhaust valves with the engine piston was excluded. The use of optimal phases leads to an increase in power up to 4.5% at a low crankshaft speed. With an increase in the speed mode, the increase in power decreases, and with a high frequency of rotation of the crankshaft, its slight decrease (1.4%) is observed. An increase in torque, up to a power utilization factor of 0.9, and its subsequent decrease, allow stabilizing the vehicle speed on a road with variable resistance. An increase in the working pressure in the hydraulic drive of the valves makes it possible to intensify gas exchange even at a high speed of rotation of the crankshaft

Download Full-text

Comparison of the Overall Energy Efficiency for Internal Combustion Engine Vehicles and Electric Vehicles

Environmental and Climate Technologies ◽

10.2478/rtuect-2020-0041 ◽

2020 ◽

Vol 24 (1) ◽

pp. 669-680

Author(s):

Aiman Albatayneh ◽

Mohammad N. Assaf ◽

Dariusz Alterman ◽

Mustafa Jaradat

Keyword(s):

Energy Efficiency ◽

Renewable Energy ◽

Power Plant ◽

Natural Gas ◽

Internal Combustion Engine ◽

Electric Vehicles ◽

Combustion Engine ◽

Internal Combustion ◽

Basic Question ◽

Electric Cars

Abstract The tremendous growth in the transportation sector as a result of changes in our ways of transport and a rise in the level of prosperity was reflected directly by the intensification of energy needs. Thus, electric vehicles (EV) have been produced to minimise the energy consumption of conventional vehicles. Although the EV motor is more efficient than the internal combustion engine, the well to wheel (WTW) efficiency should be investigated in terms of determining the overall energy efficiency. In simple words, this study will try to answer the basic question – is the electric car really energy efficient compared with ICE-powered vehicles? This study investigates the WTW efficiency of conventional internal combustion engine vehicles ICEVs (gasoline, diesel), compressed natural gas vehicles (CNGV) and EVs. The results show that power plant efficiency has a significant consequence on WTW efficiency. The total WTW efficiency of gasoline ICEV ranges between 11–27 %, diesel ICEV ranges from 25 % to 37 % and CNGV ranges from 12 % to 22 %. The EV fed by a natural gas power plant shows the highest WTW efficiency which ranges from 13 % to 31 %. While the EV supplied by coal-fired and diesel power plants have approximately the same WTW efficiency ranging between 13 % to 27 % and 12 % to 25 %, respectively. If renewable energy is used, the losses will drop significantly and the overall efficiency for electric cars will be around 40–70% depending on the source and the location of the renewable energy systems.

Download Full-text

Electric Energy Saving Systems for Internal Combustion Engine Run-in and Test Rigs

Vestnik MEI ◽

10.24160/1993-6982-2018-3-80-85 ◽

2018 ◽

Vol 3 (3) ◽

pp. 80-85

Author(s):

Yuriy M. Chikunov ◽

Keyword(s):

Internal Combustion Engine ◽

Energy Saving ◽

Combustion Engine ◽

Electric Energy ◽

Internal Combustion

Download Full-text

908 Electric Energy Consumption during Cranking Process of Internal Combustion Engine

The Proceedings of Conference of Hokuriku-Shinetsu Branch ◽

10.1299/jsmehs.2006.43.305 ◽

2006 ◽

Vol 2006.43 (0) ◽

pp. 305-306

Author(s):

Takahiro MIYASHITA ◽

Kazuhiro OYO ◽

Tatuya NISHINAKA ◽

Koji KOREMATSU ◽

Junya TANAKA

Keyword(s):

Energy Consumption ◽

Internal Combustion Engine ◽

Combustion Engine ◽

Electric Energy ◽

Internal Combustion ◽

Electric Energy Consumption

Download Full-text

Computational Intelligence techniques for maximum energy efficiency of an internal combustion engine and a steam turbine of a cogeneration process

International Journal of Energy and Environmental Engineering ◽

10.1007/s40095-014-0121-5 ◽

2014 ◽

Vol 5 (2-3) ◽

Cited By ~ 1

Author(s):

Sandra Seijo Fernández ◽

I. del Campo ◽

J. Echanobe ◽

J. García-Sedano ◽

E. Suso ◽

...

Keyword(s):

Energy Efficiency ◽

Internal Combustion Engine ◽

Steam Turbine ◽

Computational Intelligence ◽

Combustion Engine ◽

Internal Combustion ◽

Maximum Energy

Download Full-text

To the question of the history of development of electric cars

Bulletin of Sumy National Agrarian University. The series: Mechanization and Automation of Production Processes ◽

10.32845/msnau.2019.4.9 ◽

1970 ◽

pp. 42-44

Author(s):

S Geruk ◽

О Sukmanyuk ◽

O Kalnahus

Keyword(s):

Internal Combustion Engine ◽

Electric Vehicles ◽

Combustion Engine ◽

Electric Energy ◽

Internal Combustion ◽

Environmental Conservation ◽

Passenger Cars ◽

Electric Cars ◽

Automotive Market ◽

History Of

The work is devoted to the urgent issue of the invention and development of foreign and domestic electric vehicles, which is one of the possible directions in solving the issue of environmental conservation. Almost 80% of the global automotive market is heading for a ban on gasoline and the switch to electric cars and hybrids. However, this movement was, until recently, leisurely, if not slow. The popularity of electric vehicles in the world is due to the fact that they have several advantages compared to cars with an internal combustion engine. The principle of operation of an electric vehicle is based on the fact that the movement is provided by the operation of an engine that uses electric energy for its work. The electric motor plays the same role as the internal combustion engine, in addition, in the electric car, it is possible to install several engines that are able to distribute energy more efficiently and more rationally. Batteries play the function of a fuel tank, which supplies the engine with the energy necessary to ensure the movement of the car. For Ukraine, innovation is very important for the development of our country. Constant demand makes it clear that the future of electric cars. Ukrainians are paying more and more attention to such passenger cars, or hybrid ones. Every year the number of registered electric vehicles becomes more and more. The article highlights the main stages of the development of electric vehicles and presents the main problems of these vehicles, which indicate that they tend to be constantly improved.

Download Full-text