Typical performance behavior of a Diesel cycle agricultural tractor engine with electronic injection management and turbocharger

ABSTRACT: Over the past few years, changes have been observed in the behavior of typical performance curves, after higher technology has been incorporated into the agricultural tractor engines, either to satisfy the ceiling of the new pollutant gas emission limits or to achieve better efficiency. The aim of this study was to assess the typical performance behavior of an agricultural tractor engine, possessing electronic injection management, turbocharger, aftercooler and EGR (Exhaust Gas Recirculation) treatment system. An analysis was done of the information the manufacturers provided, in terms of nominal power, maximum power and maximum power with Booster, maximum torque and maximum torque with Booster. From the results, the percentage difference between the nominal power and maximum power were found to hover anywhere from 1.49 to 11.97%, for the same manufacturer, 0% in another manufacturer and 9% in a third manufacturer, for all the models. Similar results were noted for the data reported on the maximum torque and maximum torque with Booster, giving 0.62% as the minimum value, 7.44% as the average value and 12.65% as the maximum value for the entire series.

Optimisation of an Algorithm for Automatic Control of Transmission in a Wheeled Tractor

The paper considers a digital model of a wheeled agricultural tractor, as well as algorithms for automatic control of the engine and transmission. Simulation of the working conditions was performed in MATLAB and its applications, Simulink, Sim-scape. The tractor model is based on a systemic approach and includes such subsystems as the engine, transmission, undercarriage, hook load, and control actions from the operator, as well as functions of logic and optimisation for gear shifting. With the help of fundamental blocks of the Matlab package, models of tractor physical components are created. The fundamental blocks of the package serve to model the physical components of the tractor: engine, transmission control system, the transmission that includes friction clutches, gears, shafts ties with the necessary characteristics. Simulation of the working processes of a tractor unit is performed with optimisation of the laws of engine and transmission control according to the criterion of fuel efficiency and maximum power usage. The control system parameters were optimised in the transport mode, as well as in the maximum power mode in the traction range. As an illustration of the use of this analysis method, a solution to the problem of optimisation of an agricultural wheeled tractor operating modes is given. The results of this mathematical simulation are presented in this paper. Parameters of tractor operation control algorithm, which provide minimum fuel consumption in tractor operating cycles, are given. The research results showed the effectiveness of the proposed algorithms and the digital model. The presented digital model allows to debug the operating tractor control algorithms and offers an engineering practice for optimising automatic control of the agricultural tractor engine and transmission.

INTELLIGENT FAULT MONITORING SYSTEM OF NEW ENERGY TRACTOR ENGINE FOR BIG DATA

Tractor engine has complex working environment and many parts. In the process of use, with the increase of service mileage and working hours, parts will wear to a certain extent, resulting in some engine failures. Using modern fault diagnosis technology to know the working performance of tractor engine in time, and to judge whether each component is in or will be in any fault state, is of great importance and practical significance for the research of fault diagnosis technology theory and diagnosis system of tractor engine. Taking the engine of new energy tractor as the research object, the principle and monitoring method of engine intelligent fault diagnosis are introduced. Then, based on big data and neural network technology, the engine intelligent fault monitoring system of new energy tractor for big data is designed. The fault diagnosis system of tractor engine based on artificial intelligence and big data technology realizes the functions of database and signal analysis, which improves the real-time and accuracy of the system.

The problem of choosing an agricultural machine optimal in terms of power: important technical, technological and economic aspects

The article presents the results of the analysis of the dynamics of changes in the structure of the tractor fleet of agricultural organizations of the Republic of Belarus by capacity composition over the past decade. It is noted that the average power of the tractor engine in domestic agricultural enterprises during this period increased by almost 25 %. Based on the practical experience of agricultural enterprises in Russia and numerous studies conducted in Western Europe and North America, some results of these studies are presented regarding the optimal choice of equipment and the formation of an effective agricultural machine and tractor fleet for a number of determining factors and conditions.

INTERACTIVE 3D SYSTEM FOR MEASURING CONTROL PARTS DURING REPAIR OF AUTOMOTIVE ENGINES

The development of scientific hypotheses and approaches to improve the strategy of maintenance and repair of agricultural machinery is becoming one of the most relevant areas in the agro-industrial complex, since it is of paramount importance in the technical support of the machine and tractor fleet throughout the entire life cycle of machines. (Research purpose) The research purpose is in studying the methods of searching for defects of internal combustion engine on the example of the connecting rod of the tractor engine K-744. (Materials and methods) The study of methods and means of controlling parts of automotive internal combustion engines during defects and repairs are conducted. Authors developed an automated interactive system with software for monitoring these parameters on the example of the connecting rod of the K-744 tractor engine. The article proposes a new maintenance strategy based on the use of multiple tolerances, each tolerance corresponding to a certain wear rate of the part. As a result of this strategy, the failure rate is significantly reduced and the average service life increases. (Results and discussion) The article presents the experimental data on the wear of the surface of the lower connecting rod head by the angle of rotation of the internal meter. Measurements were carried out on a special installation consisting of a controlled connecting rod of the YaMZ, an internal measuring device of the NI brand-75-100-1, two metal washers with a diameter of 93 and a thickness of 7 millimeters and a micrometer of 0-100 mm, designed for calibration of the internal measuring device. (Conclusions) The experimental dependences of the surface wear of the lower connecting rod head on the angle of rotation of the internal meter for different connecting rods in three sections in height at an equal distance between themselves are 13, 20 and 27 millimeters in height of the lower connecting rod head.