Oil way switching structure, fuel system, range extender and vehicle

Abstract

The utility model relates to the technical field of engines, and discloses an oil way switching structure, a fuel system, a range extender and a vehicle. The oil way switching structure comprises a connector body, the connector body is provided with an oil inlet, a first oil outlet and a second oil outlet, the oil inlet of the oil way switching structure is communicated with an oil pump of the horizontally-opposed engine, the first oil outlet is communicated with a first oil rail assembly of the horizontally-opposed engine, and the second oil outlet is communicated with a second oil rail assembly of the horizontally-opposed engine. The second oil outlet is communicated with the second oil rail assembly of the horizontally-opposed engine, so that high-pressure oil led out by the oil pump is distributed to the oil distribution rail, the oil way switching structure can be directly connected with the oil pump, a high-pressure oil pump body does not need to be changed while fuel oil channels are increased, the structure is simple, and cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, and in particular to an oil circuit switching structure, a fuel system, a range extender and a vehicle. Background Art

[0002] The proportion of new energy vehicles has increased significantly in recent years, and the endurance of new energy vehicles is a concern for the entire industry and even users. For pure electric vehicles, the current performance of the battery makes it occupy a large space on the vehicle, and how to increase the range in a limited space is a big challenge.

[0003] When there is a certain amount of space in the car and a certain amount of battery life needs to be increased, the relevant technology considers adding a range extender (engine + generator) to the new energy electric vehicle to charge the battery. Figure 1 In order to adapt to the space of new energy vehicles, the following inline four-cylinder Figure 2 The miniaturized horizontally opposed direct injection two-cylinder engine shown. This engine needs to take into account clean fuels such as methanol. Based on the cold start characteristics of methanol fuel, a high-pressure fuel system is required. Therefore, the opposed two-cylinder engine requires two sets of injection systems, located on both sides of the two-cylinder engine. This results in a different connection between the high-pressure oil pump and the oil rail than usual, and the high-pressure oil pump body needs to be changed, resulting in increased development costs. Utility Model Content

[0004] In view of this, the utility model provides a method for solving the problem that when a high-pressure fuel system is used to supply fuel to an opposed two-cylinder engine, the high-pressure fuel pump body needs to be modified in order to adapt to the increase of fuel rails.

[0005] In a first aspect, the utility model provides an oil circuit transfer structure for a horizontally opposed engine, comprising a joint body, wherein the joint body has:

[0006] An oil inlet, used to communicate with an oil pump of the horizontally opposed engine;

[0007] a first oil outlet, used to communicate with a first oil rail assembly of the horizontally opposed engine;

[0008] The second oil outlet is used to communicate with the second oil rail assembly of the horizontally opposed engine, and the oil inlet, the first oil outlet and the second oil outlet are connected through a transition cavity formed in the joint body.

[0009] Beneficial effects: the oil inlet of the oil circuit adapter structure is connected to the oil pump of the horizontally opposed engine, the first oil outlet is connected to the first oil rail assembly of the horizontally opposed engine, and the second oil outlet is connected to the second oil rail assembly of the horizontally opposed engine, thereby distributing the high-pressure oil drawn out of the oil pump to the oil distribution rail, and the oil circuit adapter structure can be directly connected to the oil pump, increasing the fuel channel without changing the high-pressure oil pump body, the structure is simple, and cost is saved.

[0010] In an optional embodiment, a sealing ball head is provided in the adapter cavity near the oil inlet.

[0011] Beneficial effect: The connection between the oil pump and the oil circuit transfer structure is sealed by the sealing ball head, so as to ensure the sealing reliability at the transfer point during the circulation of high-pressure fuel and prevent leakage.

[0012] In an optional embodiment, a sealing cone surface is formed at the mouth of the first oil outlet and / or the mouth of the second oil outlet.

[0013] Beneficial effect: The setting of the sealing cone surface can cooperate with the sealing structure in the connecting pipeline to improve the sealing performance of the pipeline connection, further improve the sealing reliability, and ensure the reliable operation of the entire fuel system.

[0014] In an optional embodiment, the joint body is a three-way joint.

[0015] Beneficial effects: The three-way joint is used as the oil distribution component, which has a simple structure, is easy to install, and can effectively control costs.

[0016] In a second aspect, the utility model provides a fuel system, comprising:

[0017] a fuel pump having a fuel outlet;

[0018] First fuel rail assembly;

[0019] a second fuel rail assembly, wherein the first fuel rail assembly and the second fuel rail assembly are respectively arranged on opposite sides of the horizontally opposed engine;

[0020] The oil circuit transfer structure described in any of the above items, wherein the oil inlet is connected to the fuel outlet, the first oil outlet is connected to the first oil rail assembly through a pipeline, and the second oil outlet is connected to the second oil rail assembly through a pipeline.

[0021] Beneficial effects: Since the fuel system includes the oil circuit transfer structure of the utility model, it has the same beneficial effects as the oil circuit transfer structure, which will not be described in detail here.

[0022] In an optional implementation, a fuel pressure sensor is disposed on the first fuel rail assembly and / or the second fuel rail assembly.

[0023] Beneficial effect: The fuel pressure is monitored by the fuel pressure sensor to determine whether the fuel pressure meets the demand, and then the fuel supply parameters of the fuel pump are controlled to make the engine work stably.

[0024] In an optional embodiment, the pipeline between the first oil outlet and the first oil rail assembly is a first oil pipe, and the pipeline between the second oil outlet and the second oil rail assembly is a second oil pipe; and the first oil pipe and the second oil pipe have different lengths.

[0025] Beneficial effect: The first oil pipe and the second oil pipe have different lengths, which makes it easier to arrange them flexibly according to the installation space.

[0026] In an optional implementation, the length of the second fuel pipe is greater than the length of the first fuel pipe, and the fuel pressure sensor is disposed on the second fuel rail assembly.

[0027] Beneficial effect: The pressure loss of a longer oil pipe is greater than that of a shorter oil pipe. If the one with a larger pressure loss can meet the fuel pressure requirement, then the one with a smaller pressure loss will surely be able to meet it. Therefore, the fuel pressure sensor is set on the oil rail assembly with a longer oil pipe to reduce the number of sensors, simplify the control logic, and reduce cost investment.

[0028] In a third aspect, the utility model provides a range extender, comprising:

[0029] dynamo;

[0030] A horizontally opposed engine comprises the fuel system described in any one of the above items.

[0031] Beneficial effects: Since the range extender includes the fuel system of the utility model, it has the same beneficial effects as the fuel system, which will not be described in detail here.

[0032] In a fourth aspect, the utility model provides a vehicle, comprising:

[0033] Battery components;

[0034] The above-mentioned range extender is used to charge the battery assembly.

[0035] Beneficial effects: Since the vehicle includes the range extender of the utility model, it has the same beneficial effects as the range extender, which will not be described in detail here. In addition, after the range extender is set, the battery assembly of the vehicle can be charged when needed, which increases the vehicle's endurance and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the related technologies, the drawings required for use in the specific implementation methods or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0037] Figure 1 It is a structural schematic diagram of an inline four-cylinder engine in the related art;

[0038] Figure 2 It is a structural schematic diagram of a horizontally opposed direct injection two-cylinder engine in the related art;

[0039] Figure 3 A cross-sectional structural diagram of an oil circuit transfer structure of a specific embodiment of the utility model;

[0040] Figure 4 for Figure 3 Schematic diagram of the connection structure between the oil circuit transfer structure and the oil pump;

[0041] Figure 5 The figure is a schematic diagram of the layout structure of a fuel system according to an embodiment of the utility model.

[0042] Description of reference numerals:

[0043] 1. Oil pump;

[0044] 2. Connector body;

[0045] 21. Oil inlet; 22. First oil outlet; 23. Second oil outlet;

[0046] 3. The first oil pipeline;

[0047] 4. Second oil pipe;

[0048] 5. First fuel rail assembly;

[0049] 6. Second fuel rail assembly;

[0050] 7. Fuel pressure sensor;

[0051] 8. Sealing cone surface;

[0052] 9. Seal the ball head. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0054] In the description of the utility model, it should be noted that, unless otherwise specified, "multiple" means two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0055] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0056] Combine the following Figures 3 to 5 , describing an embodiment of the utility model.

[0057] According to an embodiment of the present utility model, on the one hand, as Figure 3 As shown, an oil circuit transfer structure is provided for a horizontally opposed engine, comprising a joint body 2, the joint body 2 having:

[0058] The oil inlet 21 is used to communicate with the oil pump 1 of the horizontally opposed engine, see Figure 4 The connection structure between the oil circuit transfer structure and the oil pump 1 is provided with an internal thread at the oil inlet 21, which is threadedly connected with the external thread of the connecting pipeline of the oil pump 1;

[0059] A first oil outlet 22, used to communicate with a first oil rail assembly 5 of the horizontally opposed engine;

[0060] The second oil outlet 23 is used to communicate with the second oil rail assembly 6 of the horizontally opposed engine, and the oil inlet 21 , the first oil outlet 22 and the second oil outlet 23 are connected through a transfer cavity formed in the joint body 2 .

[0061] The oil inlet 21 of the oil circuit switching structure is connected to the oil pump 1 of the horizontally opposed engine, the first oil outlet 22 is connected to the first oil rail assembly 5 of the horizontally opposed engine, and the second oil outlet 23 is connected to the second oil rail assembly 6 of the horizontally opposed engine, so that the high-pressure oil drawn from the oil pump 1 is distributed to the oil distribution rail, and the oil circuit switching structure can be directly threadedly connected to the oil pump 1, and the fuel channel can be increased without changing the high-pressure oil pump 1 body, which is simple in structure and saves costs. In addition, the threaded connection method can adjust the oil outlet directions of the first oil outlet 22 and the second oil outlet 23 by the angle tightening method, thereby improving the flexibility of the spatial layout of the fuel system.

[0062] In some other embodiments, the connector body 2 can be detachably connected to the oil pump 1 by means of snap-on connection or the like, and a quick-connect connector can be added to connect the connector body 2 to the oil pump 1. In addition, the connector body 2 can also be connected to the oil pump 1 by means of welding or the like. The connection method between the connector body 2 and the oil pump 1 can be selected according to needs, as long as reliable connection and connectivity can be guaranteed.

[0063] In one embodiment, a sealing ball head 9 is provided in the adapter cavity near the oil inlet 21 .

[0064] The connection between the oil pump 1 and the oil circuit transfer structure is sealed by the sealing ball head 9 to ensure the sealing reliability of the transfer point during the circulation of high-pressure fuel and prevent leakage.

[0065] It should be noted that a conical surface is provided in the outlet pipeline of the high-pressure oil pump 1 , and the conical surface cooperates with the sealing ball head 9 to perform reliable sealing.

[0066] In one embodiment, a sealing cone surface 8 is formed at the mouth of the first oil outlet 22 and the mouth of the second oil outlet 23 .

[0067] The setting of the sealing cone surface 8 can cooperate with the sealing structure in the connecting pipeline to improve the sealing performance of the pipeline connection, further improve the sealing reliability, and ensure the reliable operation of the entire fuel system.

[0068] The sealing structure in the connecting pipeline can also adopt a ball head, which cooperates with the sealing cone surface 8 to achieve reliable sealing at the pipeline connection.

[0069] In an optional embodiment, the joint body 2 is a three-way joint.

[0070] A three-way joint is used as the oil distribution component, which has a simple structure, is easy to install, and can effectively control costs.

[0071] According to an embodiment of the present utility model, on the other hand, a fuel system is also provided, comprising:

[0072] A fuel pump 1 having a fuel outlet;

[0073] First oil rail assembly 5;

[0074] The second fuel rail assembly 6, the first fuel rail assembly 5 and the second fuel rail assembly 6 are respectively arranged on opposite sides of the horizontally opposed engine;

[0075] The oil circuit switching structure has an oil inlet 21 connected to the fuel outlet, a first oil outlet 22 connected to the first oil rail assembly 5 through a pipeline, and a second oil outlet 23 connected to the second oil rail assembly 6 through a pipeline.

[0076] Since the fuel system includes the oil circuit transfer structure of the present invention, it has the same beneficial effects as the oil circuit transfer structure, which will not be described in detail here.

[0077] In one embodiment, a fuel pressure sensor 7 is disposed on the first fuel rail assembly 5 or the second fuel rail assembly 6 .

[0078] The fuel pressure is monitored by the fuel pressure sensor 7 to determine whether the fuel pressure meets the demand, and then the fuel supply parameters of the fuel pump 1 are controlled to ensure stable operation of the engine.

[0079] Specifically, the pipeline between the first oil outlet 22 and the first oil rail assembly 5 is the first oil pipe 3 , and the pipeline between the second oil outlet 23 and the second oil rail assembly 6 is the second oil pipe 4 ; and the first oil pipe 3 and the second oil pipe 4 have different lengths.

[0080] The first oil pipe 3 and the second oil pipe 4 have different lengths, which makes it easier to arrange them flexibly according to the installation space.

[0081] It should be noted that the length of the second fuel pipe 4 is greater than that of the first fuel pipe 3 , and the fuel pressure sensor 7 is disposed on the second fuel rail assembly 6 .

[0082] The pressure loss of a longer oil pipe is greater than that of a shorter oil pipe. If the one with a larger pressure loss can meet the fuel pressure requirement, then the one with a smaller pressure loss will surely be able to meet it. Therefore, the fuel pressure sensor 7 is set on the oil rail assembly with a longer oil pipe to reduce the number of sensors, simplify the control logic, and reduce cost investment.

[0083] Of course, in another embodiment, when the lengths of the first fuel pipe 3 and the second fuel pipe 4 are different, a fuel pressure sensor 7 may be provided on both the first fuel rail assembly 5 and the second fuel rail assembly 6 to monitor the pressure changes of each fuel rail assembly in real time and make corresponding adjustments to the fuel supply amount etc. as needed.

[0084] In some other embodiments, the first oil pipe 3 and the second oil pipe 4 have the same length, the oil pump 1 is arranged in the middle of the first oil rail assembly 5 and the second oil rail assembly 6, and the first oil rail assembly 5 and the second oil rail assembly 6 are both provided with a fuel pressure sensor 7. Since the oil pump 1 is arranged in the middle of the first oil rail assembly 5 and the second oil rail assembly 6 with the same oil pipe length, the pressure drop is the same, and the stability of the fuel system is relatively high. The fuel pressure sensor 7 is arranged on the first oil rail assembly 5 and the second oil rail assembly 6, and the two sensors can be used in one standby and the other. When the sensor in use is broken, the standby sensor can be immediately activated, saving replacement time, and the fuel system does not need to be shut down and wait, thereby improving the reliability of the fuel system; one can also be used for a period of time and then the other is started, and the two are used in rotation to prevent a sensor from being easily damaged by continuous long-term use. The two sensors can also be started at the same time. By comparing the detection data, it can be found whether one of the two oil rails is unstable in operation, and it can be immediately found and handled, thereby improving safety.

[0085] In some other embodiments, the first oil pipe 3 and the second oil pipe 4 have the same length, and the oil pump 1 is arranged between the first oil rail assembly 5 and the second oil rail assembly 6. The difference from the previous embodiment is that one of the first oil rail assembly 5 and the second oil rail assembly 6 is provided with a fuel pressure sensor 7. The two oil pipes have the same length, and the pressure drop when reaching the first oil rail assembly 5 and the second oil rail assembly 6 is also the same. Only the pressure of one of the oil rail assemblies is monitored, which reduces the number of sensors and saves costs.

[0086] like Figure 5 As shown, the specific embodiment of the utility model provides a fuel system for a horizontally opposed engine. The high-pressure oil pump 1 and the joint body of the oil circuit transfer structure are sealed by a sealing ball head 9 and tightened to each other by a screw connection structure. The oil inlet 21 of the joint body is equipped with a sealing ball head 9, which is sealed with the joint body by press fitting and welding, and two high-pressure oil outlets (the first oil outlet 22 and the second oil outlet 23) are welded at the same time to divert the high-pressure fuel.

[0087] The low-pressure fuel enters the high-pressure fuel pump 1, which is pressurized and enters the joint body through the fuel outlet of the high-pressure fuel pump 1. The fuel outlet of the high-pressure fuel pump 1 is tightened with the joint body, and the high-pressure fuel enters the first fuel rail assembly 5 and the second fuel rail assembly 6 through the first fuel outlet 22 and the second fuel outlet 23 of the joint body, respectively, to achieve fuel distribution of the engine.

[0088] The fuel pressure sensor 7 monitors the fuel pressure of the second fuel rail assembly 6 with a longer fuel line. From the control strategy, the fuel pressure sensor 7 is used to monitor the pressure at the end of the longer line and transmit it to the ECM for control.

[0089] According to an embodiment of the present utility model, on the other hand, a range extender is provided, comprising:

[0090] dynamo;

[0091] A horizontally opposed engine, comprising the above-mentioned fuel system.

[0092] Since the range extender includes the fuel system of the present invention, it has the same beneficial effects as the fuel system, which will not be described in detail here.

[0093] According to an embodiment of the present utility model, in another aspect, a vehicle is provided, comprising:

[0094] Battery components;

[0095] Range extender, used to charge the battery pack.

[0096] Since the vehicle includes the range extender of the utility model, it has the same beneficial effects as the range extender, which will not be described in detail here. In addition, after the range extender is set, the battery assembly of the vehicle can be charged when needed, which increases the vehicle's endurance and improves the user experience.

[0097] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An oil circuit transfer structure for a horizontally opposed engine, It is characterized in that The invention comprises a joint body (2), wherein the joint body (2) has: An oil inlet (21) for communicating with an oil pump (1) of the horizontally opposed engine; A first oil outlet (22) for communicating with a first oil rail assembly (5) of the horizontally opposed engine; The second oil outlet (23) is used to communicate with the second oil rail assembly (6) of the horizontally opposed engine, and the oil inlet (21), the first oil outlet (22) and the second oil outlet (23) are connected through a transition cavity formed in the joint body (2).

2. The oil circuit transfer structure according to claim 1, It is characterized in that A sealing ball head (9) is provided in the transfer chamber near the oil inlet (21).

3. The oil circuit switching structure according to claim 1, It is characterized in that A sealing cone surface (8) is formed at the mouth of the first oil outlet (22) and / or the mouth of the second oil outlet (23).

4. The oil circuit transfer structure according to claim 1, It is characterized in that The joint body (2) is a three-way joint.

5. A fuel system, It is characterized in that include: An oil pump (1) having a fuel outlet; First fuel rail assembly (5); a second fuel rail assembly (6), wherein the first fuel rail assembly (5) and the second fuel rail assembly (6) are respectively arranged on opposite sides of the horizontally opposed engine; The oil circuit switching structure according to any one of claims 1 to 4, wherein the oil inlet (21) is connected to the fuel outlet, the first oil outlet (22) is connected to the first oil rail assembly (5) through a pipeline, and the second oil outlet (23) is connected to the second oil rail assembly (6) through a pipeline.

6. The fuel system according to claim 5, It is characterized in that A fuel pressure sensor (7) is provided on the first fuel rail assembly (5) and / or the second fuel rail assembly (6).

7. The fuel system according to claim 6, It is characterized in that The pipeline between the first oil outlet (22) and the first oil rail assembly (5) is a first oil pipe (3), and the pipeline between the second oil outlet (23) and the second oil rail assembly (6) is a second oil pipe (4); and the first oil pipe (3) and the second oil pipe (4) have different lengths.

8. The fuel system according to claim 7, It is characterized in that The length of the second oil pipe (4) is greater than the length of the first oil pipe (3), and the fuel pressure sensor (7) is arranged on the second oil rail assembly (6).

9. A range extender, It is characterized in that include: dynamo; A horizontally opposed engine comprising the fuel system according to any one of claims 5 to 8.

10. A vehicle, It is characterized in that include: Battery components; The range extender of claim 9 is used to charge the battery assembly.

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