Diesel engine fuel supply system comprising manual-automatic integrated fuel supply pump
By integrating manual and electric fuel pumps into the diesel engine fuel supply system and connecting them in parallel with a one-way system, the problem of fuel supply failure caused by battery depletion or long-term inactivity in disaster relief vehicles and military vehicles has been solved, enabling normal starting in harsh environments.
Patent Information
- Application Number
- CN202420409172.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-04
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-03-04
AI Technical Summary
Traditional diesel engine fuel supply systems cannot respond quickly in emergency rescue vehicles and military vehicles, and the problem of fuel supply failure caused by vehicle power loss or long-term inactivity has not been effectively solved.
Design a diesel engine fuel supply system that includes a manual/automatic fuel supply pump. Combine a manual fuel pump and an electric fuel pump, which are connected in parallel on the fuel line. A one-way system is formed through a check valve to ensure that the manual fuel pump can assist in fuel supply when the electric fuel pump fails.
It effectively solves the problem of no fuel in the fuel line caused by vehicle power loss or long-term parking, ensuring that the vehicle can start normally in high-altitude and low-pressure areas, meeting the needs of emergency rescue and rapid response of military vehicles.
Smart Images
Figure CN222141412U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a diesel engine fuel supply system comprising a manual-automatic fuel supply pump, belonging to the technical field of vehicle fuel supply. Background Art
[0002] The fuel supply system is the most basic and important part of the engine's effective operation. However, the fuel supply of diesel engines is greatly affected by the vehicle's state and natural environmental conditions, especially for special vehicles such as emergency rescue vehicles, firefighting vehicles, military vehicles and combat vehicles, and vehicles that have been operating in high-cold and low-pressure areas for a long time. Due to long-term parking or poor operating conditions, the vehicle often fails to start. Fundamentally analyzing the possible reasons for the vehicle's failure to start, there are battery power loss and lack of oil in the fuel supply line, resulting in low system pressure and inability to supply oil normally. Traditional diesel vehicle fuel supply systems generally use a single manual oil pump or a single electric oil pump technical solution; when a single manual oil pump solution is used, it is impossible to take into account the requirements for rapid response of emergency rescue vehicles and military vehicles; when a single electric oil pump solution is used, it is impossible to solve the problem of the vehicle failing to start due to battery power loss. Utility Model Content
[0003] The purpose of the utility model is to provide a diesel engine fuel supply system including a manual-automatic fuel supply pump with dual insurance functions, so as to solve the problems of long-term vehicle stagnation, battery power loss, lack of oil in the diesel supply system pipeline and fuel supply failure in high-cold and low-pressure areas.
[0004] In order to achieve the above objectives, the technical solution of the utility model is as follows: a diesel engine fuel supply system including a manual-automatic fuel supply pump, characterized in that it includes a manual oil pump, an electric oil pump, multiple one-way valves and valve body inlet and outlet pipelines, the manual oil pump and the electric oil pump are connected in parallel on the fuel pipeline, one-way valves are respectively provided at the oil inlet end and the oil outlet section of the manual oil pump to form a one-way manual pump system, one-way valves are respectively provided at the oil inlet end and the oil outlet end of the electric oil pump to form a one-way electric oil pump system, and the electric oil pump is powered by a vehicle battery.
[0005] It should be noted that: although the diesel engine itself has a fuel supply system, the hand oil pump is still an important component. The original intention of the design of the hand oil pump is not to meet the continuous fuel supply of the diesel engine. It mainly plays the role of auxiliary fuel supply and removing air from the oil circuit to help the engine start.
[0006] When the diesel engine is working normally, it mainly relies on the diesel engine's own electric fuel supply system to provide continuous fuel supply. The fuel supply system usually includes fuel pumps, filters, fuel injectors and other components, which can automatically adjust the fuel supply amount and fuel supply pressure according to the working requirements of the diesel engine to ensure the normal operation of the diesel engine.
[0007] However, in some cases, such as when the diesel engine stops working for a long time, there is air in the low-pressure oil circuit, the system leaks, or the filter is replaced and repaired, causing air in the fuel system, which will lead to unstable fuel supply or even abnormal fuel supply, affecting the start and operation of the diesel engine. At this time, the hand oil pump can come in handy. The hand oil pump is manually operated to pump fuel into the oil circuit, remove the air in it, and provide a certain amount of fuel supply in a short time. This can help the diesel engine start or temporarily maintain operation.
[0008] Furthermore, the direction of the one-way manual oil pump system is consistent with that of the one-way electric oil pump system.
[0009] Further, the system is arranged in the fuel line between the fuel filter and the engine.
[0010] Further, the system is installed in the fuel line of the diesel engine.
[0011] Furthermore, the manual oil pump, the electric oil pump and the one-way valve are integrated into an integral fuel pump.
[0012] The beneficial effects of the utility model are: it can effectively solve the problem of special vehicles such as emergency rescue vehicles, fire fighting vehicles, military vehicles and combat readiness vehicles, and vehicles that have been operating in high-cold and low-pressure areas for a long time, which often occur due to long-term parking or poor operating conditions, and the problem of vehicles being unable to start due to lack of power and no oil in the fuel pipeline. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:
[0014] Figure 1 This is the schematic diagram of the manual-automatic fuel pump system;
[0015] Figure 2 Schematic diagram of the fuel supply system for the manual and automatic fuel pump;
[0016] In the figure: 1. Valve body pipeline; 2. Check valve; 3. Manual oil pump; 4. Motor; 5. Electric oil pump; 6. Fuel tank; 7. Diesel filter; 8. Manual-automatic fuel pump; 9. Engine. DETAILED DESCRIPTION
[0017] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings: This embodiment proposes a diesel engine fuel supply system, including a manual-automatic diesel engine fuel supply pump, which integrates a manual oil pump 3, an electric oil pump 5 and a one-way valve 2 into an integral fuel pump. The manual oil pump 3 and the oil inlet and outlet of the electric oil pump 5 are each connected to a one-way valve 2, forming a one-way manual oil pump 3 system and a one-way electric oil pump 5 system. The one-way manual oil pump 3 system and the one-way electric oil pump 5 system are connected in parallel to the valve body oil inlet and outlet, and the directions are kept consistent, forming a complete manual-automatic integrated fuel pump.
[0018] Figure 1 The valve body of the manual and automatic fuel pump 8 shown is connected Figure 2 The diesel vehicle fuel supply system shown in the figure; when the vehicle battery has power and there is no oil in the fuel pipeline, the electric oil pump 5 is started, and the electric oil pump 5, with the assistance of the valve body pipeline 1 and the one-way valve 2, pumps the fuel from the fuel tank 6 to the engine 9, and the vehicle starts; when the vehicle battery is low on power, the manual oil pump 3 is pressed, and the manual oil pump 33, with the assistance of the valve body pipeline 1 and the one-way valve 2, pumps the fuel from the fuel tank 6 to the engine 9, and the vehicle starts.
[0019] It should be noted that the hand oil pump has a relatively slow oil supply speed and is not a long-term replacement for the diesel engine's own oil supply system. It is only an emergency measure or auxiliary tool. If the diesel engine needs continuous oil supply, it is still necessary to ensure the normal operation of the oil supply system, including the normal operation of the oil pump, the unobstructed oil circuit, and the good condition of the filter.
[0020] The above description is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technology can understand that any changes or substitutions that can be thought of within the technical scope disclosed by the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.
Claims
1. A diesel engine fuel supply system including a manual-automatic fuel supply pump, characterized in that: It includes a manual oil pump, an electric oil pump, multiple one-way valves and valve body inlet and outlet pipelines. The manual oil pump and the electric oil pump are connected in parallel on the fuel pipeline. One-way valves are respectively provided at the oil inlet end and the oil outlet section of the manual oil pump to form a one-way manual pump system. One-way valves are respectively provided at the oil inlet end and the oil outlet end of the electric oil pump to form a one-way electric oil pump system. The electric oil pump is powered by the vehicle battery.
2. The diesel engine fuel supply system comprising a manual-automatic fuel supply pump according to claim 1, characterized in that: The direction of the one-way manual oil pump system is consistent with that of the one-way electric oil pump system.
3. A diesel engine fuel supply system comprising a manual-automatic fuel supply pump according to claim 1, characterized in that: The manual fuel pump, the electric fuel pump and the one-way valve are integrated into an integral fuel pump.
4. A diesel engine fuel supply system comprising a manual-automatic fuel supply pump according to claim 1, characterized in that: The system is installed in the fuel line of a diesel engine.
5. The diesel engine fuel supply system including a manual-automatic fuel supply pump according to claim 1 or 4, characterized in that: The system is located in the fuel line between the fuel filter and the engine.