scholarly journals RESEARCH OF RATIONAL VARIANTS OF MODERNIZATION OF ARMORED TROOP-CARRIER BTR-70

2021 ◽  
Vol 1 (37) ◽  
pp. 60-68
Author(s):  
R. Kaidalov ◽  
◽  
I. Strashnyi ◽  
G. Marenko ◽  
�. Dikikh ◽  
...  
Keyword(s):  
Power Plant ◽  
Diesel Engines ◽  
National Guard ◽  
Fuel Efficiency ◽  
Structural Features ◽  
Gear Ratio ◽  
Maximum Speed ◽  
Power Structures ◽  
Gasoline Engines ◽  
Armored Vehicle

Currently, the National Guard of Ukraine and other power structures of the state are actively working on the acquisition of subdivisions with modern weapons, including armored vehicles. For objective reasons, such work cannot be done in a short time, therefore, the BTR-70 armored troop-carrier, developed and adopted in the seventies of the last century, is still in operation in significant numbers. An analysis of the design of the armored troop-carrier indicates that its power plant has structural features that do not fully meet modern approaches to the design of such weapons and, moreover, the vehicles have practically exhausted their assigned resource. However, the experience of operating the BTR-70, including in the combat zone, testifies that the potential capabilities and maintainability inherent in its design make it possible to use the armored troop-carrier even after the end of its intended resource, although the aforementioned complicates and increases the cost of operation. One of the ways to solve this problem is the modernization of the power plant of the armored troop-carrier, in particular, the replacement of gasoline engines with modern diesel engines and the improvement of the transmission design. In the course of the study, traction and speed properties of the armored vehicle in the standard configuration and when equipped with two D245.30E2 engines and Deutz engines are calculated and estimated. As a change in the design of the transmission, the option of replacing the standard gearbox with a gearbox with an overdrive is considered. It was found that equipping an armored personnel carrier with modern diesel engines in both cases leads to a significant increase in traction properties and an improvement in the fuel efficiency of the vehicle. However, due to the fact that the crankshaft speed of diesel engines is approximately 25-30 % lower than the corresponding frequency of gasoline engines, the maximum speed of an armored personnel carrier with diesel engines is limited by the design of the transmission and is about 70 km / h. This does not meet modern requirements for machines of this type, therefore, as an option; it is proposed to install a step-up reducer (divider) at the inlet of the gearbox. In this case, it is possible to reduce the gear ratio of the transmission in higher gears and, accordingly, increase the maximum speed of the armored troop-carrier on paved roads.

scholarly journals Electromechanical transmission of tracked machine energy characteristics study

2021 ◽  
Vol 18 (1) ◽  
pp. 12-29
Author(s):  
V. N. Kuznetsova ◽  
R. V. Romanenko
Keyword(s):  
Power Plant ◽  
Internal Combustion Engine ◽  
High Efficiency ◽  
Combustion Engine ◽  
Fuel Efficiency ◽  
Internal Combustion ◽  
Operating Conditions ◽  
Maximum Speed ◽  
Tracked Vehicle ◽  
Energy Characteristics

Introduction. The use of an electromechanical transmission in the design of a tracked vehicle allows an increase in the complex indicator of mobility, an increase in the range, fuel efficiency, maximum speed, a decrease in acceleration time, etc. The improvement of these indicators is achieved mainly due to the different performance characteristics of the internal combustion engine and the energy characteristics of electrical machines. The latter fact makes it possible to ensure the operation of the power plant of the tracked vehicle in such a way as to avoid unfavorable operating modes of both the internal combustion engine and the elements of the electromechanical transmission (a generator, a traction electric motor, an energy storage) from the point of view of energy efficiency, and to realize the high efficiency of the entire system.Research methods. To improve the mobility and implement a rational strategy for electromechanical transmission control, it is necessary to have an idea of the effective modes of operation of the main elements of the power plant. As a way to solve this problem it is proposed to study the energy characteristics of the main elements of an electromechanical transmission using the developed mathematical model for various modes of movement of a tracked vehicle.Results. Modeling the motion of a tracked vehicle with an electromechanical transmission makes it possible, in addition to determining the transmission parameters, to formulate preliminary requirements for its characteristics.Discussion and conclusion. To solve these problems, it is necessary to simulate the process of movement of a tracked vehicle, taking into account the initial data that are adequate to real operating conditions.

Public Perception and Acceptance of Diesel-Powered Passenger Cars in Malaysia: An Initial Study

2014 ◽  
Vol 663 ◽  
pp. 49-53
Author(s):  
Muhammad Faiz Abdul Hamid ◽  
Wan Mohd Faizal Wan Mahmood ◽  
Mohd Radzi Abu Mansor ◽  
Shahrir Abdullah
Keyword(s):  
Air Pollution ◽  
Diesel Engines ◽  
Public Perception ◽  
Fuel Efficiency ◽  
Initial Study ◽  
European Countries ◽  
Transport Sector ◽  
Passenger Cars ◽  
Gasoline Engines ◽  
Engine Reliability

Globally, the transport sector consumes the biggest share of the fuel supply. Common fuels used in the transport sector are petrol and diesel. Diesel engines have been proven to be more advantageous over gasoline engines, in the aspects of fuel efficiency and engine reliability. The use of diesel passenger cars is very popular in European countries compared to Malaysia. A wider use of diesel-powered cars in Malaysia may benefit the car users, government and the country. The study of the causes of the low percentage of diesel-powered car usage in Malaysia was examined in this present study by using the latest data available in the literature, and by conducting a survey to measure the perceptions and views of the Malaysian public towards diesel-powered passenger cars. Results of this study showed that most of the respondents admitted that diesel engines give more savings. However, respondent perception that diesel-powered cars emit noise and high air pollution of the environment is the main reason Malaysians not choosing diesel-powered cars.

scholarly journals TO THE COMPARATIVE EVALUATION OF FUEL ECONOMY OF THE BTR-70 CAR WITH DIFFERENT TRANSMISSION

2021 ◽  
Vol 1 (50) ◽  
pp. 198-209
Author(s):  
Sakhno V ◽  
◽  
Dykich O ◽  
Keyword(s):  
Fuel Consumption ◽  
Fuel Economy ◽  
Comparative Evaluation ◽  
Gasoline Engine ◽  
Fuel Efficiency ◽  
Steady Motion ◽  
Gear Ratio ◽  
Operating Conditions ◽  
Engine Fuel ◽  
Gasoline Engines

The article considers the issue of choosing a gearbox for the modernization of the BTR-70 by replacing two gasoline engines with two diesels. The object of research is the fuel economy of the BTR-70 car with different gearboxes when replacing two gasoline engines with two diesels. The purpose of the work – to determine the type and gear ratio of the transmission, which provides the best fuel efficiency of the car. Research method - mathematical modeling. When replacing a gasoline engine with a diesel of a different power and a different speed range, it is necessary to determine the gear ratio so as to provide the car with the required level of speed properties in the specified operating conditions with minimal fuel consumption. Due to the fact that the modernization of the BTR-70 involves the replacement of the engine and transmission, the further search for the gearbox was carried out on the basis of analysis of existing structures by the maximum torque of the engine. A five-speed and eight-speed MAZ gearbox and a six-speed Mercedes-Benz G 85-6 / 6.7 gearbox were used for analysis. Taking into account the fact that at a given coefficient of drag  = 0.03 the car can move only in direct gear, then for all gearboxes the fuel characteristics of steady motion will be the same as the control fuel consumption, which was 30 l / 100 km. In terms of fuel consumption during the acceleration of the car and the average kilometer fuel consumption when driving on paved roads, preference should be given to a car with a Mercedes-Benz G 85-6 / 6,7 transmission and only when driving in difficult road conditions, preference should be given to the car with 8-speed MAZ-5335 transmission. KEY WORDS: CAR, ENGINE, FUEL ECONOMY, TRANSMISSION, GEAR RATING, SPEED, COMPARATIVE EVALUATION

Fuel Efficiency – Challenges and Innovations in Emulsified Fuel Technology

2015 ◽  
Author(s):  
Jerry Ng ◽  
Kaisa Honkanen
Keyword(s):  
Diesel Engines ◽  
Fuel Injection ◽  
Fuel Efficiency ◽  
Combustion Efficiency ◽  
Secondary Atomization ◽  
Emulsified Fuel ◽  
Main Challenge ◽  
Marine Diesel ◽  
Initial Fuel ◽  
Fuel Technology

Emulsified fuel technology has been developed since the early 1980’s to the improve combustion efficiency of marine diesel engines by creating a secondary atomization effect after the initial fuel injection. The main challenge is to measure the improved sfoc of ships accurately and reliably. This paper presents a proposed method to measure the sfoc accurately and reliably to the order of 1%. Electronic governor also poses new challenge to measuring the sfoc of ships burning emulsified fuel. Meanwhile, fuel types supplied to ship owners are of increased varying properties although still complying to ISO8217 standard. This paper describes the innovations in emulsified fuel technology that were developed to meet these challenges.

scholarly journals Ecological Aspects of Implementing Prospective Propulsion Schemes of Short and Medium Haul Aircrafts

2015 ◽  
Vol 4 (2) ◽  
pp. 67-72 ◽  
Author(s):  
Самойлов ◽  
M. Samoylov ◽  
Бурцев ◽  
S. Burtsev ◽  
Симаков ◽  
...  
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Alternative Fuels ◽  
Fuel Efficiency ◽  
Civil Aviation ◽  
Propulsion Systems ◽  
Hybrid Propulsion ◽  
Ecological Aspects ◽  
Hybrid Power Plant ◽  
Traditional Patterns

The influence of the circuitry of the hybrid power plant short and medium haul aircraft on their fuel efficiency and environmental characteristics have been investigated. Directions of improvement of traditional patterns of power plants of aircraft on the example of PD-14 engine were analyzed. It has been shown that the use of turbojet engines and traditional schemes operating on aviation kerosene, will not allow to fulfill the demands made by the International Civil Aviation Organization (ICAO) to perspective plane 2025–2035. The analysis of the three schemes hybrid propulsion systems has been performed. It has been shown that using the presented hybrid propulsion systems of alternative fuels can reduce CO2 emissions by 19% to 20% compared with conventional turbojet engines, which run on kerosene TS-1. It has been shown that this fuel efficiency is increased by 2–3%, and the total mass of the power plant increases of 6 to 16%.

scholarly journals INFLUENCE OF MAIN GEAR RATIO ON CAR FUEL EFFICIENCY IN THE DRIVE CYCLE

2018 ◽  
Vol 15 (1) ◽  
pp. 19-29
Author(s):  
S. A. Gorozhankin ◽  
N. V. Savenkov ◽  
V. V. Ponyakin
Keyword(s):  
Fuel Efficiency ◽  
Gear Ratio ◽  
Drive Cycle

The performance and emission characteristics of emulsified fuel in a direct injection diesel engine

2007 ◽  
Vol 221 (7) ◽  
pp. 893-900 ◽  
Author(s):  
M P Ashok ◽  
C G Saravanan
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Diesel Engines ◽  
Injection Pressure ◽  
Alternative Fuel ◽  
Experimental Investigations ◽  
Maximum Speed ◽  
Power Sources ◽  
Performance And Emission ◽  
Emulsified Fuel

Diesel engines are employed as the major propulsion power sources because of their simple, robust structure and high fuel economy. It is expected that diesel engines will be widely used in the foreseeable future. However, an increase in the use of diesel engines causes a shortage of fossil fuel and results in a greater degree of pollution. To regulate the above, identifying an alternative fuel to the diesel engine with less pollution is essential. Ethanol–diesel emulsion is one such method, used for the preparation of an alternative fuel for the diesel engine. Experimental investigations were carried out to compare the performance of diesel fuel with different ratios 50D: 50E (50 per cent diesel No: 2: 50 per cent ethanol –100 per cent proof) and 60D: 40E emulsified fuels. In the next phase, experiments were conducted for the selected emulsified fuel ratio 50D: 50E for different high injection pressures and the results are compared. The results show that for the emulsified fuel ratios, there is a marginal increase in torque, power, NO x, emissions, and decreasing values of carbon monoxide (CO), sulphur dioxide (SO2) emissions at the maximum speed conditions, compared with diesel fuel. Also, it is found that an increase in injection pressure of the engine running with emulsified fuel decreases CO and smoke emissions especially between 1500 to 2000 r/min with respect to the diesel fuel.

scholarly journals Design and Optimization of an Integrated Turbo-Generator and Thermoelectric Generator for Vehicle Exhaust Electrical Energy Recovery

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3134 ◽  
Author(s):  
Prasert Nonthakarn ◽  
Mongkol Ekpanyapong ◽  
Udomkiat Nontakaew ◽  
Erik Bohez
Keyword(s):  
Diesel Engines ◽  
High Performance ◽  
Thermoelectric Generator ◽  
Waste Heat ◽  
Electrical Energy ◽  
Vehicle Exhaust ◽  
Gasoline Engines ◽  
Design And Optimization ◽  
Charging Station ◽  
Turbo Generator

The performance of turbo-generators significantly depends on the design of the power turbine. In addition, the thermoelectric generator can convert waste heat into another source of energy. This research aims to design and optimize an integrated turbo-generator and thermoelectric generator for diesel engines. The goal is to generate electricity from the vehicle exhaust gas. Electrical energy is derived from generators using the flow, pressure, and temperature of exhaust gases from combustion engines and heat-waste. In the case of turbo-generators and thermoelectric generators, the system automatically adjusts the power provided by an inverter. Typically, vehicle exhausts are discarded to the environment. Hence, the proposed conversion to electrical energy will reduce the alternator charging system. This work focuses on design optimization of a turbo-generator and thermoelectric generator for 2500 cc. diesel engines, due to their widespread usage. The concept, however, can also be applied to gasoline engines. Moreover, this model is designed for a hybrid vehicle. Charging during running will save time at the charging station. The optimization by variable van angles of 40°, 50°, 62°, 70°, and 80° shows that the best output power is 62°, which is identical to that calculated. The maximum power outputted from the designed prototype was 1262 watts when operating with an exhaust mass flow rate of 0.1024 kg/s at 3400 rpm (high performance of the engine). This research aims to reduce fuel consumption and reduce pollution from the exhaust, especially for hybrid vehicles.

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