System for preheating fuel oil of automotive diesel engine in winter and control method of system

Abstract

The invention relates to a system for preheating fuel oil of an automotive diesel engine in winter and a control method of the system. The system is characterized in that an electric three-way valve I is arranged on a connecting pipeline of a fuel feed pipe of an engine, a main fuel feed pipe of a main fuel tank and an auxiliary fuel feed pipe of an auxiliary fuel tank, an electric three-way valve II is arranged on a connecting pipeline of an oil return pipe of the engine, a main oil return pipe of the main fuel tank and an auxiliary oil return pipe of the auxiliary fuel tank, an electric three-way valve III is arranged on a connecting pipeline of a warm-wind water inlet pipe, a water return pipe of an aluminum heating pipe, and a water inlet pipe of a liquid heater, an ECU (Electronic Control Unit) and the liquid heater are supplied with power through a storage battery, a power supply circuit is connected and disconnected by an automotive key switch, a time-delay relay is arranged on the power supply circuit, and a temperature sensor I of the engine, a temperature sensor II in the main fuel tank, the liquid heater and the electric three-way valves I, II and III are respectively connected with the ECU by leads for realizing automatic control. With the fuel oil preheating system provided by the invention, the normal working of the automotive diesel engine with No.0 diesel oil in winter can be realized, and enormous economic benefits are brought to an automobile owner.

Description

technical field [0001] The invention relates to a fuel preheating system and a control method for an automobile diesel engine in winter, and belongs to the technical field of an engine fuel supply system and a starting system. Background technique [0002] At present, the engines of large passenger cars, trucks and construction machinery are all diesel engines, and diesel engines usually use zero-grade diesel. However, in a low temperature environment, No. 0 diesel is easy to form wax, which reduces the fluidity of diesel, which may seriously block the fuel supply of the diesel engine's fuel tank, so that the engine cannot be started normally, which affects the performance of the vehicle. On the other hand, there is a price difference between high-grade diesel and low-grade diesel. Therefore, it is of great significance to the society to solve the technical problem of using No. 0 diesel in automobiles in winter. [0003] At the same time, diesel engines are generally diffi...

AI Technical Summary

Problems solved by technology

In addition, in a lower temperature environment, the particle size of the fuel atomization is large, so that the fuel cannot be completely burned, resulting in a large amount of harmful gases, causing the vehicle emissions to seriously exceed the standard

The most important point is that the lubricating oil inside the engine may be in a solidified state during cold start, resulting in poor lubrication of parts and severe engine wear

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