CN209761596U - A fuel system with fault diagnosis and detection function - Google Patents

Abstract

The utility model relates to the technical field of diesel fuel systems, in particular to a fuel system with fault diagnosis and detection functions, comprising a fuel tank, a fuel injection mechanism and an alarm mechanism. The mechanism and the alarm mechanism are connected by the high-pressure oil pipe leaking and returning to the main pipe. The alarm mechanism is connected to the fuel tank through the alarm fuel tank drain pipe. The fuel injection mechanism includes the fuel injection pump, the fuel injector, the double-layer high-pressure fuel pipe and the high-pressure fuel pipe leakage branch pipe. The alarm mechanism includes Alarm tank, pull plug door and sensor for collecting leaked oil. The utility model can prevent the high-pressure oil pipe from cracking and leaking, and inject fuel to the exhaust pipe to the greatest extent, and can collect the leaked oil, quickly find the cracking and leaking fault of the high-pressure oil pipe, and prevent the occurrence of fire. The cracked or leaked information is transmitted to the control system for timely protection and reduction of losses caused by accidents such as fires.

Description

A fuel system with fault diagnosis and detection function

technical field

The utility model relates to the technical field of diesel engine fuel systems, in particular to a fuel system with fault diagnosis and detection functions.

Background technique

The fuel system is usually composed of fuel injection pump, fuel filter, fuel injector and other components. Its main function is to supply a certain amount of clean and well atomized diesel oil according to the needs of operating conditions, so as to be mixed with a certain amount of air to form Combustible mixture to ensure the required fuel flow under various working conditions.

Diesel engine fuel system consists of high pressure fuel system and low pressure fuel system, including fuel injection pump inlet and return pipelines, fuel injection pump, fuel injector, high pressure fuel pipe, fuel fine filter and pressure regulating valve and other components, and together complete the fuel supply of diesel engine, Oil return, filtration and other functions. During the operation of this type of fuel system, if the high-pressure oil pipe cracks or leaks, it cannot be detected or protected in time, which will cause a fire.

Utility model content

In order to overcome the deficiencies of the existing diesel fuel system, the utility model provides a fuel system with fault diagnosis and detection functions.

The technical scheme adopted by the utility model to solve the technical problem is: a fuel system with fault diagnosis and detection functions, including a fuel tank, a fuel injection mechanism and an alarm mechanism, and the fuel tank passes through an oil return pipe and several fuel injection mechanisms Connection, the fuel injection mechanism and the alarm mechanism are connected through the high-pressure oil pipe leakage and return oil main pipe, the alarm mechanism is connected to the fuel tank through the alarm fuel tank drain pipe, and the fuel injection mechanism includes a fuel injection pump, a fuel injector, a double-layer high-pressure The oil pipe and the high-pressure oil pipe leakage branch pipe, one end of the double-layer high-pressure oil pipe is provided with a fuel injector, and the other end is provided with a fuel injection pump, the double-layer high-pressure oil pipe is provided with a high-pressure oil pipe leakage branch pipe connected to the high-pressure oil pipe leakage return oil main pipe, The alarm mechanism includes an alarm tank for collecting leaked and returned oil, a plug door and a sensor, the sensor is arranged in the alarm tank, and an alarm tank return pipe connected to the alarm tank drain pipe is arranged on the side of the alarm tank. , a pull plug door is arranged on the oil drain pipe of the alarm tank.

According to another embodiment of the present invention, it further includes that the plurality of fuel injection mechanisms are one or more fuel injection mechanisms.

According to another embodiment of the present utility model, it further comprises that one end of the oil return pipe is connected with the fuel tank, and the other end is connected with the fuel injection pump and the fuel injector.

According to another embodiment of the present utility model, it further comprises that one end of the alarm fuel tank drain pipe is connected to the fuel tank, and the other end is connected to the alarm fuel tank.

According to another embodiment of the present invention, it further comprises that the sensor is connected with the electronic control unit through the alarm signal feedback line.

According to another embodiment of the present utility model, it further comprises that a pull plug door is provided between the alarm oil tank and the connection between the alarm oil tank oil return pipe and the alarm oil tank oil drain pipe.

According to another embodiment of the present invention, the further included sensor is a liquid level float sensor.

The beneficial effects of the utility model are as follows: the utility model can prevent the high-pressure oil pipe from cracking and leaking, and inject fuel onto the exhaust pipe to the greatest extent, and can collect the leaked oil, quickly find the cracking and leakage fault of the high-pressure oil pipe, and prevent the occurrence of fire. , Through the sensor, the information of the cracking or leakage of the high-pressure oil pipe can be transmitted to the control system, so as to protect in time and reduce the losses caused by accidents such as fire.

Description of drawings

The utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Figure 1 is a schematic structural diagram of the present invention.

In the picture 1, fuel tank, 2, alarm fuel tank drain pipe, 3, pull the plug door, 4, alarm fuel tank return pipe, 5, alarm fuel tank, 6, sensor, 7, alarm signal feedback circuit, 8, high pressure fuel pipe leaks back Oil main pipe, 9. Fuel injector, 10. Double-layer high-pressure fuel pipe, 11. Fuel injection pump, 12. High pressure fuel pipe leakage branch pipe, 13. Fuel injection return pipe, 14. Electronic control unit.

Detailed ways

Figure 1 is a schematic structural diagram of the present utility model, a fuel system with fault diagnosis and detection functions, including a fuel tank 1, a fuel injection mechanism and an alarm mechanism. The fuel mechanism is connected, the fuel injection mechanism and the alarm mechanism are connected through the high-pressure oil pipe leakage return oil main pipe 8, the alarm mechanism is connected to the fuel tank 1 through the alarm fuel tank drain pipe 2, and the fuel injection mechanism includes a fuel injection pump 11, a sprayer The oiler 9, the double-layer high-pressure oil pipe 10 and the leakage branch pipe 12 of the high-pressure oil pipe. One end of the double-layer high-pressure oil pipe 10 is provided with a fuel injector 9, and the other end is provided with a fuel injection pump 11. The double-layer high-pressure oil pipe 10 is provided with and The high-pressure oil pipe leakage branch pipe 12 connected to the high-pressure oil pipe leakage and oil return main pipe 8, the alarm mechanism includes an alarm oil tank 5 for collecting the leaked oil, a pulling plug door 3 and a sensor 6, and the sensor 6 is arranged in the alarm oil tank 5. , the alarm oil tank 5 is provided with an alarm oil tank return pipe 4 connected to the alarm oil tank oil discharge pipe 2, and the alarm oil tank oil discharge pipe 2 is provided with a pulling plug door 3. The utility model can prevent high-pressure oil pipes to the greatest extent. After the crack and leak, the fuel is injected onto the exhaust pipe, and the leaked oil can be collected and returned, and the crack and leakage fault of the high-pressure fuel pipe can be quickly found to prevent the occurrence of fire. The sensor 6 can transmit the cracked or leaked information of the high-pressure fuel pipe to the control system. , in order to protect in time and reduce the loss caused by accidents such as fire.

The several fuel injection mechanisms are one or more fuel injection mechanisms. One end of the fuel injection return pipe 13 is connected to the fuel tank 1, and the other end is connected to the fuel injection pump 11 and the fuel injector 9. The alarm fuel tank drain pipe 2 One end is connected with the fuel tank 1, the other end is connected with the alarm fuel tank 5, the sensor 6 is connected with the electronic control unit 14 through the alarm signal feedback line 7, and the pull plug door 3 is arranged on the alarm fuel tank 5 and the alarm fuel tank return pipe 4 Between the connection with the alarm oil tank drain pipe 2, the sensor 6 is a liquid level float sensor.

Working principle: During the operation of the diesel engine, fuel is supplied from the fuel tank 1 to the diesel engine, passed through the fuel filter, supplied to the fuel injection pump 11, and supplied to the fuel injector 9 through the double-layer high-pressure fuel pipe 10. The inner pipe of the oil pipe 10 is cracked and leaked, and the fuel oil will smoothly return to the bottom of the high-pressure oil pipe due to the protection of the outer pipe of the double-layer high-pressure oil pipe 10, and will be collected into the high-pressure oil pipe leakage return pipe 8 through the high-pressure oil pipe leakage branch pipe 12, and finally Collected into the alarm tank 5, when the leaked fuel collected by the alarm tank 5 reaches the designed warning line, the sensor 6 will generate an alarm signal and feed it back to the diesel engine control system through the alarm signal feedback line 7 in time. The liquid level switch will be turned on, and the leaked fuel will pass through the alarm fuel tank return pipe 4, be combined with the alarm fuel tank drain pipe 2, and then return to the fuel tank 1. Under normal circumstances, the pull plug door 3 is closed.

This fuel system has a simple layout, stable and safe operation, and it is easy to design and improve the ordinary fuel system without involving major changes, and the application of this fuel system can greatly reduce the fire caused by the rupture of the high-pressure fuel pipe. , improve the safety of diesel engine operation.

The above description is only illustrative rather than restrictive for the present invention, and those of ordinary skill in the art will understand that many modifications, changes or are equivalent, but all fall within the protection scope of the present invention.

Claims (7)

1. A fuel system with fault diagnosis and detection functions, characterized in that it comprises a fuel tank (1), a fuel injection mechanism and an alarm mechanism, and the fuel tank (1) passes through a fuel injection return pipe (13) and several The fuel injection mechanism is connected, the fuel injection mechanism and the alarm mechanism are connected through the high-pressure oil pipe leakage return oil main pipe (8), and the alarm mechanism is connected to the fuel tank (1) through the alarm fuel tank drain pipe (2). The mechanism includes a fuel injection pump (11), a fuel injector (9), a double-layer high-pressure fuel pipe (10) and a leakage branch pipe (12) of the high-pressure fuel pipe, one end of the double-layer high-pressure fuel pipe (10) is provided with a fuel injector (9), The other end is provided with a fuel injection pump (11), the double-layer high-pressure oil pipe (10) is provided with a high-pressure oil pipe leakage branch pipe (12) connected to the high-pressure oil pipe leakage oil return main pipe (8), and the alarm mechanism includes an alarm mechanism for collecting The alarm oil tank (5), the plug door (3) and the sensor (6) that leak and return oil, the sensor (6) is arranged in the alarm oil tank (5), and the side of the alarm oil tank (5) is provided with and The alarm oil tank oil return pipe (4) is connected to the alarm oil tank oil drain pipe (2), and the alarm oil tank oil drain pipe (2) is provided with a pulling plug door (3). 2 . The fuel system with fault diagnosis and detection functions according to claim 1 , wherein the plurality of fuel injection mechanisms are one or more fuel injection mechanisms. 3 . 3. A fuel system with fault diagnosis and detection functions according to claim 1, wherein one end of the fuel injection return pipe (13) is connected with the fuel tank (1), and the other end is connected with a fuel injection pump (13). 11) and injector (9). 4. A fuel system with fault diagnosis and detection functions according to claim 1, wherein one end of the alarm fuel tank drain pipe (2) is connected to the fuel tank (1), and the other end is connected to the alarm fuel tank (5). )connect. 5 . The fuel system with fault diagnosis and detection function according to claim 1 , wherein the sensor ( 6 ) is connected to the electronic control unit ( 14 ) through an alarm signal feedback line ( 7 ). 6 . 6. A fuel system with fault diagnosis and detection function according to claim 1, characterized in that, the pull plug door (3) is arranged on the alarm fuel tank (5), the alarm fuel tank return pipe (4) and the Between the connections of the alarm fuel tank drain pipe (2). 7 . The fuel system with fault diagnosis and detection function according to claim 1 , wherein the sensor ( 6 ) is a liquid level float sensor. 8 .