Diagnostics of fuel efficiency indicators of internal combustion engines in the logging industry

Internal combustion engines have been improved markedly in recent years through efforts to conserve resources, reduce emissions and improve fuel efficiency. In this regard, the authors have been working to reduce friction and improve the seizure properties of the crankshaft main journal and main bearing. These mechanical components of internal combustion engines incur large friction losses. In order to reduce friction, journals have been coated with a diamond-like carbon (DLC) coating, which has been reported to reduce friction in the fluid lubrication regime in recent years. Another current issue of journals and bearings is the need to improve seizure resistance. Therefore, these properties were evaluated for material combinations of aluminium alloy bearings and DLC-coated journals, which have low affinity. The results revealed that friction was reduced under a fluid lubrication regime and seizure resistance was improved under a mixed lubrication regime.

Download Full-text

Calculation and Optimization of Tribocontacts and Lubrication Systems of Internal Combustion Engines for Various Types of Lubricant

World Tribology Congress III, Volume 2 ◽

10.1115/wtc2005-63021 ◽

2005 ◽

Cited By ~ 1

Author(s):

S. Sivrikova ◽

J. Rojdestvensky ◽

I. Petrov ◽

S. Popova

Keyword(s):

Steady State ◽

Internal Combustion Engines ◽

Fuel Efficiency ◽

Internal Combustion ◽

Combustion Engines ◽

Lubrication System ◽

Optimum Choice ◽

Transient And Steady State

Quality, reliability and fuel efficiency of internal combustion engines (ICE) substantially depend upon optimum choice of lubrication system and tribocontact design and a lubricant liquid. This paper describes a quasistatic method of analysis of ICE lubrication systems for Newtonian and non-Newtonian oils. The method allows for both transient and steady-state conditions.

Download Full-text

Heat and Power Plants and Their Automatic Control and Regulation Systems

Herald of the Bauman Moscow State Technical University Series Mechanical Engineering ◽

10.18698/0236-3941-2020-6-106-130 ◽

2020 ◽

pp. 106-130

Author(s):

V.A. Markov

Keyword(s):

Power Plant ◽

Automatic Control ◽

Power Plants ◽

Internal Combustion Engines ◽

Energy Transport ◽

Fuel Efficiency ◽

Internal Combustion ◽

Technical Conference ◽

Combustion Engines ◽

Russian Scientific

The paper emphasizes the relevance of research aimed at further improving the systems of automatic control and regulation of heat and power plants, mainly plants with reciprocating internal combustion engines. The study assessed the current level of the development of these systems, and analyzed the prospects of their use as mobile and stationary heat and power plants. These plants are widely used in various sectors of the economy --- energy, transport, agriculture, so it appears important to describe the main directions of further improvement of these plants and their automatic control and regulation systems. The purpose of the research was to further increase the power indicators of heat and power plants, improve their fuel efficiency and exhaust gas toxicity, and enhance the dynamic qualities of internal combustion engines. In our study, we also examined the main directions of improving the fuel supply and air supply systems of engines, their work process, adaptation of engines to work on various alternative types of fuel. Findings of research show that it is necessary to expand the functional capabilities of control and regulation systems, implement integrated adaptive control of a heat and power plant and its systems, use electronic microprocessor devices in the structure of regulators, enhance the multi-parameter efficiency of the operation of a heat and power plant and its elements, taking into account the whole set of parameters of this plant The paper was based on the materials of the reports of the all-Russian scientific and technical conference n.a. Professor V.I. Krutov (29.01.2020)

Download Full-text

Priority areas of scientific and technical development of the domestic tractor industry

Machinery and Equipment for Rural Area ◽

10.33267/2072-9642-2021-2-2-7 ◽

2021 ◽

pp. 2-7

Author(s):

Yu.F. Lachuga ◽

◽

A.Yu. Izmailov ◽

Ya.P. Lobachevsky ◽

A.S. Dorokhov ◽

...

Keyword(s):

Russian Federation ◽

Agricultural Production ◽

Energy Supply ◽

Internal Combustion Engines ◽

Internal Combustion ◽

Developed Countries ◽

Combustion Engines ◽

Foreign Countries ◽

The Russian Federation ◽

Efficiency Indicators

It is shown that the level of provision with tractors and energy supply of agricultural production in Russia is significantly lower than those in developed countries. It was found that the current annual level of purchase of tractors does not allow compensating for their disposal. Domestic production of tractors is significantly inferior to their import and the number of tractors to be assembled of tractor sets delivered from foreign countries on the territory of the Russian Federation. The theory of tractors with second-generation internal combustion engines is proposed, which makes it possible to create energy-intensive tractors with higher efficiency indicators.

Download Full-text

A Review of Energy Loss Reduction Technologies for Internal Combustion Engines to Improve Brake Thermal Efficiency

Energies ◽

10.3390/en14206656 ◽

2021 ◽

Vol 14 (20) ◽

pp. 6656

Author(s):

Zhijian Wang ◽

Shijin Shuai ◽

Zhijie Li ◽

Wenbin Yu

Keyword(s):

Energy Loss ◽

Thermal Efficiency ◽

Internal Combustion Engines ◽

Fuel Efficiency ◽

Ghg Emissions ◽

Internal Combustion ◽

Combustion Engines ◽

Loss Reduction ◽

Low Carbon ◽

To Come

Today, the problem of energy shortage and climate change has urgently motivated the development of research engaged in improving the fuel efficiency of internal combustion engines (ICEs). Although many constructive alternatives—including battery electric vehicles (BEVs) and low-carbon fuels such as biofuels or hydrogen—are being put forward, they are starting from a very low base, and still face significant barriers. Nevertheless, 85–90% of transport energy is still expected to come from combustion engines powered by conventional liquid fuels even by 2040. Therefore, intensive passion for the improvement of engine thermal efficiency and decreasing energy loss has driven the development of reliable approaches and modelling to fully understand the underlying mechanisms. In this paper, literature surveys are presented that investigate the relative advantages of technologies mainly focused on minimizing energy loss in engine assemblies, including pistons and rings, bearings and valves, water and oil pumps, and cooling systems. Implementations of energy loss reduction concepts in advanced engines are also evaluated against expectations of meeting greenhouse gas (GHG) emissions compliance in the years to come.

Download Full-text

Response to the Comments: Fuel Efficiency of Internal Combustion Engines

Energy & Fuels ◽

10.1021/ef900193z ◽

2009 ◽

Vol 23 (6) ◽

pp. 3339-3342 ◽

Cited By ~ 7

Author(s):

R. Tao ◽

K. Huang ◽

H. Tang ◽

D. Bell

Keyword(s):

Internal Combustion Engines ◽

Fuel Efficiency ◽

Internal Combustion ◽

Combustion Engines

Download Full-text

Investigation on the Frictional Performance of Surface Textured Ring-Deformed Liner Conjunction in Internal Combustion Engines

Energies ◽

10.3390/en12142761 ◽

2019 ◽

Vol 12 (14) ◽

pp. 2761 ◽

Cited By ~ 1

Author(s):

Cheng Liu ◽

Yanjun Lu ◽

Yongfang Zhang ◽

Lujia Tang ◽

Cheng Guo ◽

...

Keyword(s):

Surface Texture ◽

Power Dissipation ◽

Internal Combustion Engines ◽

Fuel Efficiency ◽

Internal Combustion ◽

Combustion Engines ◽

Frictional Properties ◽

Frictional Performance ◽

Lubrication Condition ◽

Micro Dimples

In internal combustion engines (ICEs), the frictional performance of ring-liner conjunction (RLC) has drawn special attention because it greatly affects the fuel efficiency of the engines. In recent years, surface texture (i.e., micro dimples or grooves) has emerged as a promising approach to improve the frictional performance of RLC. However, most current studies on surface textured RLC were conducted by assuming that the liner was ideally circular and the lubrication condition was either fully flooded or starved. In this study, to evaluate the frictional characteristics of an RLC with surface texture on the ring, a numerical model of lubrication is presented by considering the liner deformation, as well as the coexistence of the fully flooded and staved lubrication conditions in an engine cycle. On this basis, the frictional properties of a surface textured RLC are analyzed, and the impacts of the liner deformation and temperature on the friction-reducing effect of the surface texture are also evaluated. The results show that the surface texture on the ring can effectively reduce the power dissipation and friction dissipation of an RLC, and the reductions vary with the liner temperature and deformation. Large reductions in the power dissipation and friction dissipation of an RLC are obtained when the liner temperature is low or the liner deformation is small.

Download Full-text