DOI 10.36461/NP.2024.71.3.022
UDC 621.436.24

TECHNICAL SOLUTIONS FOR SPLIT FUEL SUPPLY IN TRACTOR DIESEL
A.P. Ukhanov, Doctor of Engineering Sciences, Professor; M.V. Ryblov, Doctor of Engineering Sciences, Associate Professor;
I.V. Semin, graduate student
Penza State Agrarian University, Penza, Russia, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

To improve the traction, economic and environmental performance of the tractor, technical solutions have been developed for the implementation of the split fuel supply (SFS) method in a diesel engine. This method consists in supplying a certain dose of hydrocarbon fuel activator (gasoline, kerosene, blended alcohol-benzine fuel, etc.) at the diesel intake stroke with the formation of air-activator mixture (AAM) in the intake manifold and the subsequent supply of the main dose of motor diesel fuel (DF) to the formed mixture at the end of the compression stroke. To implement the SFS, the diesel must be retrofitted with a microprocessor controled AAM cylinder supply system. The basis of such an electronic technical system is a microprocessor control unit (MPCU), which processes incoming information from sensors of the diesel load and speed modes and generates outgoing electrical signals that control the activation of the electric pump and the operation of electromechanical injectors that supply the fuel activator cylinder-by-cylinder to the branches of the diesel intake manifold. For the microprocessor of the control unit to function, an algorithm for controlling the metered supply of a fuel activator is written into it in machine language. The design of the MPCU, which calculates the duration of the injection of the activator by electromechanical injectors and ensures the phased formation of the AAM, is consistent with the start of the intake stroke in the diesel cylinders. For preliminary tests of a prototype of a microprocessor-based cylinder control system (MCCU) for the supply of AAM at the laboratory research stage, a device was manufactured that simulates the operation of sensors for diesel load-speed modes. The simulator allows you to test a microprocessor-based electronic engineering system without using a motor stand and sensors mounted on a diesel engine, which simplifies the process of debugging and fine-tuning the system by reducing labor and energy costs and fuel spent during bench research. The completed research and development allowed us to conduct bench studies of diesel engines and tractors with split fuel supply, which confirm the improvement of traction, economic and environmental performance of tractor equipment.
Keywords: tractor atmospheric diesel, split fuel supply, air-activator mixture, microprocessor control, simulator of load-speed modes.

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