CN202746040U - Automatic temperature control type cooling system for diesel engine fuel oil - Google Patents

Abstract

The utility model discloses an automatic temperature-controlled cooling system for fuel oil of a diesel engine, which comprises a fuel tank, a first one-way valve, a fuel cooler, a two-position three-way electromagnetic reversing valve, a central controller, a temperature sensor, and a second one-way valve . The fuel return pipeline of the diesel engine is connected with the two-position three-way electromagnetic reversing valve, the output port of the two-position three-way electromagnetic reversing valve is connected with the input port of the second one-way valve through the pipeline, and the output port of the second one-way valve is connected with the fuel The other output port of the two-position three-way electromagnetic reversing valve is connected to the fuel cooler through a pipeline and then connected to the input port of the first check valve, which is connected to the fuel tank; the temperature sensor measures the Temperature and transmit the temperature signal to the central controller, the central controller is connected with the solenoid valve coil to control its work. The utility model controls the temperature of the fuel oil in the range of -5°C to 60°C, so that the performance of the diesel engine can be fully exerted.

Description

Diesel engine fuel automatic temperature control cooling system

technical field

The utility model relates to a diesel engine, in particular to a fuel oil automatic temperature control cooling system of the diesel engine, which belongs to the technical field of diesel engines. the

Background technique

Diesel engines are widely used as power output devices for various construction machinery. Due to the complex and changeable working conditions of construction machinery such as ambient temperature and load conditions, when the fuel temperature exceeds a certain temperature range, the power of the diesel engine will decrease, which will directly affect the power performance of the diesel engine; and the excessively high fuel temperature will reduce the viscosity of the fuel , which may damage the precision components in the diesel fuel injection system. Therefore, in order to make the diesel engine work normally, the fuel temperature needs to be controlled within a certain range. the

However, the use of a single fuel cooler will cause the temperature of the fuel to be too low when the diesel engine works under low ambient temperature and low load conditions. Too low fuel temperature will increase fuel viscosity, poor fluidity, and even wax formation, which will affect the power performance of the diesel engine. the

Therefore, it is of great significance to provide a method that can automatically control the fuel temperature of the diesel engine to ensure that the fuel temperature is kept within a certain range, so that the diesel engine can work efficiently under various working conditions. the

Contents of the invention

The purpose of the utility model is to provide an automatic temperature-controlled cooling system for fuel oil of a diesel engine, so as to ensure that the diesel engine can work efficiently under various working conditions. the

The purpose of this utility model is achieved through the following technical solutions:

An automatic temperature-controlled cooling system for diesel engine fuel, including a fuel tank 1, a first one-way valve 2, a fuel cooler 3, a two-position three-way electromagnetic reversing valve 4, a central controller 5, a temperature sensor 6, and a second one-way valve valve 7. The fuel return pipeline of the diesel engine is connected to the input port of the two-position three-way electromagnetic reversing valve 4, and an output port of the two-position three-way electromagnetic reversing valve 4 is connected to the input port of the second one-way valve 7 through the pipeline. The output port of the second one-way valve 7 is connected with the fuel tank 1; the other output port of the two-position three-way electromagnetic reversing valve 4 is connected with the fuel cooler 3 through a pipeline and then connected with the input of the first one-way valve 2 The output port of the first one-way valve 2 is connected with the fuel tank 1; the temperature sensor 6 measures the fuel temperature and transmits the temperature signal to the central controller 5, and the central controller 5 communicates with the two-position three-way electromagnetic switch It is connected to the solenoid valve coil of valve 4 to control its work.

Compared with the prior art, the beneficial effect of the utility model is: through the different states of the two-position three-way electromagnetic reversing valve, the fuel oil from the diesel engine can pass or not pass through the fuel cooler, and the temperature of the fuel oil can be controlled at -5°C to In the range of 60 ℃, the performance of the diesel engine can be fully exerted, and at the same time, the service life of various parts in the fuel system of the diesel engine can be better guaranteed. the

Description of drawings

Figure 1 is the system structure diagram when the cooler is not working;

Figure 2 is the system structure diagram when the cooler works.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described. As shown in Figure 1, the utility model includes a fuel tank 1, a first one-way valve 2, a fuel cooler 3, a two-position three-way electromagnetic reversing valve 4, a central controller 5, a temperature sensor 6, and a second one-way valve 7. The fuel return pipeline of the diesel engine is connected to the input port of the two-position three-way electromagnetic reversing valve 4, and an output port of the two-position three-way electromagnetic reversing valve 4 is connected to the input port of the second one-way valve 7 through the pipeline. The output port of the second one-way valve 7 is connected with the fuel tank 1; the other output port of the two-position three-way electromagnetic reversing valve 4 is connected with the fuel cooler 3 through a pipeline and then connected with the input of the first one-way valve 2 The output port of the first one-way valve 2 is connected with the fuel tank 1; the temperature sensor 6 measures the fuel temperature and transmits the temperature signal to the central controller 5, and the central controller 5 communicates with the two-position three-way electromagnetic switch It is connected to the solenoid valve coil of valve 4 to control its work. the

As shown in Figure 1, when the temperature sensor detects that the temperature of the fuel in the fuel tank is in the range of -5°C to 60°C, the working state of the system: in this state, the fuel temperature signal is collected through the temperature sensor 6 installed on the fuel tank 1, And the signal is sent to the central controller 5, and the central controller 5 judges through the internal program, thereby controlling the two-position three-way electromagnetic reversing valve 4 not to work. At the same time, the fuel returned by the diesel engine reaches the two-position three-way electromagnetic reversing valve 4 through port A, and then flows through the second one-way valve 7 from the two-position three-way electromagnetic reversing valve 4 and then burns back to the fuel tank. At this time, the first single Valve 2 plays a role in preventing fuel backflow. the

As shown in Figure 2, when the temperature of the fuel in the fuel tank is not in the range of -5°C to 60°C, the working state of the system: in this state, the fuel temperature signal is collected by the temperature sensor 6 installed on the fuel tank 1 and sent to the central The controller 5 and the central controller 5 judge through the internal program, thereby controlling the work of the two-position three-way electromagnetic reversing valve 4 . At the same time, the fuel returned by the diesel engine reaches the two-position three-way electromagnetic reversing valve 4 through port A, and then flows through the fuel cooler 3 through the two-position three-way electromagnetic reversing valve 4, the fuel is cooled, and then the fuel passes through the first check valve 2 back to the fuel tank, at this time the second one-way valve 7 plays the role of preventing fuel backflow. the

The system controls the fuel temperature within the temperature range set by the controller through the above two states. the

In addition to the above-mentioned embodiments, the utility model can also have other embodiments, and all technical solutions formed by equivalent replacement or equivalent transformation all fall within the scope of protection required by the utility model. the

Claims (1)

1. automatic temperature-controlled cooling system of diesel engine fuel oil, it is characterized in that, comprise fuel tank (1), the first one-way valve (2), Fuel Oil Cooler (3), two position, three-way electromagnetic change valve (4), central control unit (5), temperature transducer (6), the second one-way valve (7); The diesel engine fuel oil return line links to each other with the inlet opening of described two position, three-way electromagnetic change valve (4), a delivery outlet of two position, three-way electromagnetic change valve (4) links to each other by the inlet opening of pipeline with the second one-way valve (7), and the delivery outlet of the second one-way valve (7) links to each other with fuel tank (1); Another delivery outlet of described two position, three-way electromagnetic change valve (4) links to each other with the inlet opening of the first one-way valve (2) after linking to each other with Fuel Oil Cooler (3) by pipeline, and the delivery outlet of the first one-way valve (2) links to each other with fuel tank (1); Described temperature transducer (6) is measured fuel oil temperature and temperature signal is transferred to central control unit (5), and central control unit (5) links to each other with the electromagnetic valve coil of described two position, three-way electromagnetic change valve (4), controls its work.

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