An integrated engine oil return interface and engine

Abstract

The utility model discloses an engine oil return interface of integrated structure, including the seat body, be equipped with first oil return chamber, second oil return chamber and third oil return chamber in the seat body, first oil return chamber, second oil return chamber all intercommunication third oil return chamber, first oil return chamber, second oil return chamber and third oil return chamber's other end is equipped with interface A, interface B and interface C respectively, wherein, interface A intercommunication first oil return chamber, interface B intercommunication second oil return chamber, interface C intercommunication third oil return chamber, the utility model has simple structure, and the universality is strong, the universality is strong and so on advantage.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and in particular to an integrated engine oil return interface and engine. Background Technology

[0002] The purpose of the engine return fuel inlet is to reliably collect excess fuel from the engine's high-pressure fuel pump, the injectors of each cylinder, and the high-pressure common rail, and return it to the fuel tank through the fuel lines. Simultaneously, it must ensure the proper layout of the fuel return lines, providing reliable connections with fuel line transition joints and fuel hoses to prevent leaks. The engine return fuel inlet also needs to support, adjust, and connect with related engine components, and prevent the fuel return lines from interfering with adjacent components and causing potential hazards, thus increasing engine safety during operation. Its main functions are support, connection, adjustment, and protection.

[0003] Existing patent document CN203488302U discloses a fuel return device, which is fixed by a self-supporting method through a fuel return device with a cavity body, thereby reducing the volume of the fuel return device and shortening the length of the injector return pipe, common rail return pipe and fuel pump return pipe.

[0004] The main drawbacks of existing technologies are their complex structure, limited adjustable degrees of freedom, and inconvenient installation. Current engine fuel return interfaces typically use a fuel return pipe connected via a fuel line bolt to centrally return fuel to the engine fuel return interface. This method is prone to interference between the fuel line and adjacent components, hinders disassembly and assembly, and increases the likelihood of fuel leakage due to gasket failure. Furthermore, connecting the fuel line to the engine fuel return interface via a fuel line bolt can easily create installation pre-stress, making the fuel line (rigid pipe) susceptible to fatigue cracking and fuel leakage due to engine vibration.

[0005] The above background information is provided only to aid in understanding the concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0006] The main purpose of this utility model is to propose an integrated engine return interface and engine with a simplified arrangement of the injector return pipe and common rail return pipe, a simple structure, and strong versatility.

[0007] Therefore, this utility model proposes an integrated engine oil return interface and engine.

[0008] Preferably, the present invention may also have the following technical features:

[0009] An integrated engine oil return interface includes a housing with a first oil return chamber, a second oil return chamber, and a third oil return chamber within the housing. The first and second oil return chambers are both connected to the third oil return chamber. The other ends of the first, second, and third oil return chambers are respectively provided with interfaces A, B, and C. Interface A connects to the first oil return chamber, interface B connects to the second oil return chamber, and interface C connects to the third oil return chamber. Thus, interfaces A and B connect to a return pipe, introducing fuel into the first and second oil return chambers, which then converge into the third oil return chamber. The returned fuel then returns to the fuel tank via interface C.

[0010] Furthermore, the third oil return chamber is a bent pipe structure, which includes an L-shaped pipe structure with a longitudinal chamber and a transverse chamber. The transverse chamber is arranged horizontally, and the longitudinal chamber is arranged vertically or inclined. The lower end of the longitudinal chamber is connected to the transverse chamber, and the first oil return chamber and the second oil return chamber are connected to the upper end of the longitudinal chamber.

[0011] Furthermore, the first and second oil return chambers are arranged horizontally and are coaxial.

[0012] Furthermore, the longitudinal cavity is arranged vertically, and the first oil return cavity, the second oil return cavity, and the longitudinal cavity form a T-shaped cavity structure, with the same inner diameter for the first oil return cavity, the second oil return cavity, and the longitudinal cavity.

[0013] Furthermore, the inner diameter of the transverse cavity is larger than the inner diameter of the longitudinal cavity.

[0014] Furthermore, the base also includes a hanging ear, which is welded and fixed to the upper part of the base and has a connecting hole.

[0015] Furthermore, the connecting hole is a round hole or an oblong hole.

[0016] An engine including the aforementioned engine return port includes an intake manifold, an injector, a high-pressure common rail, a high-pressure diesel pump, an injector return pipe, a common rail return pipe, and a pump return pipe. The high-pressure common rail is installed on the side of the intake manifold away from the cylinder head. The high-pressure diesel pump is located below the high-pressure common rail, and the housing is installed at the lower part of the high-pressure common rail.

[0017] Furthermore, the injector return pipe and the common rail return pipe are connected as a whole to form a first return pipe. The front part of the first return pipe is connected to the injector return port, the middle part is provided with an oil passage bolt, and the oil passage bolt connects to the high-pressure common rail return port. The rear part is the common rail return pipe, and the end of the common rail return pipe is connected to the interface A. One end of the oil pump return pipe is connected to the return port of the high-pressure diesel pump, and the other end is connected to the interface B.

[0018] Furthermore, the interface C is connected to the fuel tank via a fuel tank hose.

[0019] The advantages of this invention compared to existing technologies include: simplified arrangement of the injector return pipe and common rail return pipe; simple structure; strong versatility; and adaptability to engines on different platform models. The elongated hole structure of the mounting lugs facilitates the installation of the engine's return interface, reducing installation prestress and allowing for flexible arrangement. Furthermore, the oil passage bolts enable multi-directional angle adjustment, resulting in good adaptability. Attached Figure Description

[0020] Figure 1 This is a three-dimensional view of the oil return interface of this utility model.

[0021] Figure 2 This is a cross-sectional view of the oil return interface of this utility model.

[0022] Figure 3 This is a schematic diagram illustrating the application of this utility model. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0024] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0025] like Figures 1-2 The diagram illustrates an integrated engine oil return port structure, comprising a base 1. The base 1 contains a first oil return chamber 21, a second oil return chamber 22, and a third oil return chamber 11. The first and second oil return chambers 21 and 22 are both connected to the third oil return chamber 11. Preferably, the other ends of the first, second, and third oil return chambers 21, 22, and 11 are respectively provided with interfaces A, B, and C. Interface A is located at the end of the first oil return chamber 21, interface B at the end of the second oil return chamber 22, and interface C at the end of the third oil return chamber 11. Thus, interfaces A and B connect to the oil return pipe, introducing fuel into the first and second oil return chambers 21 and 22, then converging into the third oil return chamber 11. The returned fuel then returns to the fuel tank via interface C. In this embodiment, the ports of the first oil return chamber 21 and the second oil return chamber 22 can be used as interface A and interface B respectively, or oil bolts can be installed on the ports of the first oil return chamber 21 and the second oil return chamber 22 respectively as interface A and interface B.

[0026] In some preferred embodiments, the third oil return chamber 11 is a bent pipe structure, such as an L-shaped pipe structure including a longitudinal chamber 23 and a transverse chamber, wherein the transverse chamber is arranged horizontally, the longitudinal chamber 23 is arranged vertically or inclined, its lower end is connected to the end of the transverse chamber, and its upper end is connected to the first oil return chamber 21 and the second oil return chamber 22.

[0027] Furthermore, the first oil return chamber 21 and the second oil return chamber 22 are arranged horizontally and coaxially. For example, the longitudinal cavity 23 is arranged vertically, and the first oil return chamber 21, the second oil return chamber 22, and the longitudinal cavity 23 form a T-shaped cavity structure, with all three having the same inner diameter. Preferably, the inner diameter of the transverse cavity is larger than the inner diameter of the longitudinal cavity.

[0028] The seat 1 also includes a lug 31, which is welded and fixed to the upper part of the seat 1 and has a connecting hole 32. The connecting hole 32 is a round hole or an oblong hole. In this way, the seat 1 is fixed to the cylinder block of the engine 5 by passing a bolt through the connecting hole 32.

[0029] Combination Figure 3 An engine including the aforementioned engine return port includes an intake manifold, fuel injectors, a high-pressure common rail 6, a high-pressure diesel pump 7, fuel injector return pipes, a common rail return pipe 41, and a fuel pump return pipe 42. The high-pressure common rail 6 is installed on the side of the intake manifold away from the cylinder head. The high-pressure diesel pump 7 is located below the high-pressure common rail 6, and the mounting body 1 is fixed to the lower part of the high-pressure common rail 6 by bolts. Preferably, the bolts fixing the mounting body 1 and the bolts fixing the high-pressure common rail 6 are the same bolt, simplifying the installation structure.

[0030] More specifically, the injector return pipe and the common rail return pipe 41 are connected as a single unit to form the first return pipe. The front part of the first return pipe is the injector return pipe 44, which connects to the injector return port. A fuel pass bolt 43 is located in the middle, connecting to the return port of the high-pressure common rail pipe 6. The rear part is the common rail return pipe 41, with its end connected to interface A. In this way, the injector return pipe 44 and the common rail return pipe 41 are connected to the same pipe, allowing fuel from the injector return pipe 44 to flow into the rear part of the first return pipe (i.e., the common rail return pipe 41) and then back to interface A.

[0031] One end of the fuel pump return pipe 42 is connected to the return port of the high-pressure diesel pump 7, and the other end is connected to the interface B. One end of the fuel tank pipe is connected to the fuel tank, and the other end is connected to the interface C. In this way, the fuel from the first return pipe and the fuel pump return pipe 42 converges in the third return chamber 11, and then flows back to the fuel tank through the interface C and the fuel tank pipe.

[0032] Preferably, the interface C is an oil-filled bolt, which facilitates the adjustment of the oil pipe orientation and improves assembly compatibility.

[0033] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0034] Although exemplary embodiments of the present invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the present invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the present invention.

Claims

1. An integrated engine oil return interface, characterized in that: The device includes a base, which contains a first oil return chamber, a second oil return chamber, and a third oil return chamber. The first and second oil return chambers are both connected to the third oil return chamber. The other ends of the first, second, and third oil return chambers are respectively provided with an interface A, an interface B, and an interface C. Interface A is connected to the first oil return chamber, interface B is connected to the second oil return chamber, and interface C is connected to the third oil return chamber.

2. The integrated engine oil return interface as described in claim 1, characterized in that: The third oil return chamber is a bent pipe structure, which includes an L-shaped pipe structure with a longitudinal chamber and a transverse chamber. The transverse chamber is arranged horizontally, and the longitudinal chamber is arranged vertically or inclined. The lower end of the longitudinal chamber is connected to the transverse chamber, and the first oil return chamber and the second oil return chamber are connected to the upper end of the longitudinal chamber.

3. The integrated engine oil return interface as described in claim 2, characterized in that: The first and second return oil chambers are arranged horizontally and are coaxial.

4. The integrated engine oil return interface as described in claim 3, characterized in that: The longitudinal cavity is arranged vertically, and the first oil return cavity, the second oil return cavity, and the longitudinal cavity form a T-shaped cavity structure, with the same inner diameter for the first oil return cavity, the second oil return cavity, and the longitudinal cavity.

5. The integrated engine oil return interface as described in claim 2, characterized in that: The inner diameter of the transverse cavity is larger than the inner diameter of the longitudinal cavity.

6. The integrated engine oil return interface as described in claim 1, characterized in that: The base also includes a hanging ear, which is welded and fixed to the upper part of the base and has a connecting hole.

7. The integrated engine oil return interface as described in claim 6, characterized in that: The connecting hole is a round hole or an oblong hole.

8. An engine including the engine return port as described in claim 1, comprising an intake manifold, an injector, a high-pressure common rail, a high-pressure diesel pump, an injector return pipe, a common rail return pipe, and a pump return pipe, characterized in that: The high-pressure common rail is installed on the side of the intake pipe away from the cylinder head; the high-pressure diesel pump is located below the high-pressure common rail, and the housing is installed at the lower part of the high-pressure common rail.

9. The engine as claimed in claim 8, characterized in that: The injector return pipe and the common rail return pipe are connected as one unit to form the first return pipe. The front part of the first return pipe is connected to the injector return port, the middle part is provided with an oil passage bolt, and the oil passage bolt connects to the high-pressure common rail return port. The rear part is the common rail return pipe, and the end of the common rail return pipe is connected to the interface A. One end of the oil pump return pipe is connected to the return port of the high-pressure diesel pump, and the other end is connected to the interface B.

10. The engine as claimed in claim 9, characterized in that: The interface C is connected to the fuel tank via a fuel tank hose.

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