Engine oil control mechanism and fuel oil system

Abstract

A high-pressure oil pump, a low-pressure oil pump and an electric speed regulator are installed on a cylinder body, a low-pressure oil inlet pipeline is arranged on the low-pressure oil pump, the traveling end of the low-pressure oil inlet pipeline is connected with the high-pressure oil pump, a high-pressure oil pipe is arranged on the high-pressure oil pump, and an oil injector is arranged at the oil outlet end of the high-pressure oil pipe. The utility model has the beneficial effects that the push rod of the electric speed regulator and the rack of the high-pressure oil pump are in face-to-face contact and can be self-adaptive to the adjustment of the advance angle of oil supply, the oil filling amount is realized by the forward movement of the push rod of the electric speed regulator, and the oil reducing amount is realized by the reset spring of the oil pump, so that the oil supply amount of the high-pressure pump can be simply and effectively controlled; the low-pressure oil pump, the high-pressure oil pump and the electric speed regulator are all mounted on the cylinder body and can be replaced independently, so that the fuel system is convenient to maintain, and the fuel system can be mounted on different cylinder bodies, so that the fuel system is good in interchangeability and wide in application range.

Description

Technical Field

[0001] The utility model relates to a fuel system of a two-cylinder diesel engine, in particular to an engine oil control mechanism and a fuel system. Background Art

[0002] The engine fuel system is the system with the highest manufacturing and adjustment precision in the internal combustion engine. Its main function is to provide the engine with the right amount of fuel in a timely and high-quality manner. The application of two-cylinder diesel engines is mainly in the fields of agriculture, engineering, and ships. Generally speaking, the working environment of diesel engines is relatively harsh. The development of existing two-cylinder diesel engine fuel systems is generally based on a specific model. After the development is completed, if there is a variant model, it is generally necessary to redesign and arrange the fuel system and other system parts involved in the variant, and to a certain extent, the engine needs to be recalibrated and the durability re-evaluated, which is time-consuming and labor-intensive, and cannot quickly keep up with market demand, resulting in a certain loss of sales. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide an engine oil control mechanism and a fuel system.

[0004] The purpose of the utility model is achieved through the following technical solutions: an engine oil control mechanism, including a cylinder body, a high-pressure oil pump is installed on the cylinder body, the high-pressure oil pump is provided with a rack for adjusting the amount of oil filling, one end of the rack protrudes from the pump housing of the high-pressure oil pump, the rack has a raised throttle pull rod pin, a waist-shaped hole is opened on the pump housing of the high-pressure oil pump, the throttle pull rod pin of the high-pressure oil pump is penetrated into the waist-shaped hole, a return spring is installed on the pump housing where the waist-shaped hole is located, one end of the return spring is connected to the throttle pull rod pin, an electric speed regulator is installed on the cylinder body, and the push rod of the electric speed regulator contacts the end face of the rack.

[0005] Optionally, a second mounting surface is provided on the cylinder body, and the high-pressure oil pump is mounted on the second mounting surface.

[0006] Optionally, a timing adjustment gasket is installed between the high-pressure oil pump and the cylinder body.

[0007] Optionally, a third mounting surface is provided on the cylinder body, a connecting stop and a camshaft mounting hole are provided on the third mounting surface, the camshaft of the high-pressure oil pump is installed in the cam mounting hole, the electric speed regulator is installed on the third mounting surface, the front end of the electric speed regulator is transitionally fitted in the connecting stop, and the push rod is inserted into the connecting stop.

[0008] Optionally, a sealing gasket is installed between the electric speed regulator and the cylinder body.

[0009] An engine fuel system includes an engine oil control mechanism and a low-pressure oil pump. The low-pressure oil pump is installed on a cylinder body and is located on one side of a high-pressure oil pump. A low-pressure oil inlet pipeline is provided on the low-pressure oil pump. The outlet end of the low-pressure oil inlet pipeline is connected to the high-pressure oil pump. A high-pressure oil pipe is provided on the high-pressure oil pump. An injector is provided at the oil outlet end of the high-pressure oil pipe.

[0010] Optionally, a first oil return pipeline is provided on the injector, and a three-way joint is connected to the first oil return pipeline, one joint of the three-way joint is connected to the third oil return pipeline, and the other joint of the three-way joint is connected to the second oil return pipeline, the second oil return pipeline is connected to the high-pressure oil pump, and the third oil return pipeline is connected to the low-pressure oil pump, and one-way valves are provided in the first oil return pipeline, the second oil return pipeline and the third oil return pipeline.

[0011] Optionally, an oil inlet connector is provided on the low-pressure oil pump, and the third oil return pipeline is connected to the oil inlet connector.

[0012] Optionally, a first mounting surface is provided on the cylinder body, the first mounting surface is located on one side of the second mounting surface of the cylinder body, and the low-pressure oil pump is mounted on the first mounting surface.

[0013] The utility model has the following advantages: the engine oil control mechanism of the utility model, the electric speed governor push rod and the high-pressure oil pump rack adopt face-to-face contact, can adapt to the adjustment of the fuel supply advance angle, and the fuel filling amount is realized by the forward movement of the electric speed governor push rod, and the fuel reduction amount is realized by the return spring of the oil pump, so that the fuel supply amount of the high-pressure pump can be simply and effectively controlled; the engine fuel system of the utility model realizes the supply of oil, and the excess oil can be returned to the inlet of the low-pressure oil pump, thereby saving oil consumption, and the low-pressure oil pump, the high-pressure oil pump and the electric speed governor are all installed on the cylinder body and can be replaced separately, thereby making the fuel system easy to maintain, and can be installed on different cylinder bodies, thereby making the fuel system interchangeable and having a wide range of uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the engine fuel system;

[0015] Figure 2 It is a structural schematic diagram of the engine oil control mechanism;

[0016] Figure 3 This is a schematic diagram of the installation of the return spring on the high-pressure oil pump;

[0017] Figure 4 It is a structural schematic diagram of the cylinder body;

[0018] In the figure, 1-electric speed governor, 11-push rod, 2-high-pressure oil pump, 21-high-pressure oil pipe, 22-first oil return line, 23-camshaft, 24-timing adjustment gasket, 25-rack, 26-reset spring, 27-waist-shaped hole, 28-throttle pull rod pin, 3-low-pressure oil pump, 31-oil inlet joint, 32-low-pressure oil inlet line, 4-tee joint, 41-second oil return line, 42-third oil return line, 5-injector, 100-cylinder body, 101-first mounting surface, 102-second mounting surface, 103-camshaft mounting hole, 104-third mounting surface, 105-connecting stop. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present 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 a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] like Figure 1 and Figure 2 As shown, an engine fuel system is mainly used for a two-cylinder diesel engine, including an engine oil control mechanism. In this embodiment, the engine oil control mechanism includes a cylinder body 100, and a high-pressure oil pump 2 is installed on the cylinder body 100. Figure 2As shown, the high-pressure oil pump 2 has a rack 25 for adjusting the amount of oil to be refueled, one end of the rack 25 protrudes from the pump housing of the high-pressure oil pump 2, and a protruding throttle rod pin 28 is provided on the rack 25. A waist-shaped hole 27 is provided on the pump housing of the high-pressure oil pump 2, and the throttle rod pin 28 of the high-pressure oil pump 2 is inserted into the waist-shaped hole 27. A return spring 26 is installed on the pump housing where the waist-shaped hole 27 is located, and one end of the return spring 26 is connected to the throttle rod pin 28. An electric The electric speed governor 1 is operated, and the push rod 11 of the electric speed governor 1 is in contact with the end surface of the rack 25. Therefore, the front end of the push rod 11 of the electric speed governor 1 and the end surface of the rack 25 of the high-pressure oil pump 2 are in surface-to-surface contact, thereby eliminating the problem of increasing the thickness of the adjustment gasket of the high-pressure oil pump 2 due to the need for advance angle adjustment; when the electric speed governor 1 is working, the push rod 11 is pushed forward, thereby pushing the rack 25 to move forward, thereby changing the refueling amount of the high-pressure oil pump 2. In this embodiment, the high-pressure oil pump 2 The oil pump 2 belongs to the prior art, and the control of the refueling amount by moving the rack 25 also belongs to the prior art. Therefore, how the movement of the rack 25 can realize the change of the refueling amount of the high-pressure oil pump 2 is not repeated here, and the return spring 26 is always in a stretched state, that is, the return spring 26 will apply a pulling force to the rack 25, and under the action of the pulling force, the end face of the rack 25 is always in contact with the end face of the push rod 11. Therefore, when the push rod 11 of the electric speed governor 1 is extended, the high-pressure oil pump 2 performs the refueling action, and when the push rod 11 of the electric speed governor 1 retracts, the rack 25 retreats under the action of the return spring 26. At this time, the high-pressure oil pump 2 performs the oil reduction action, and when the throttle rod pin 28 is at the front end of the waist-shaped hole 27, the refueling amount of the high-pressure oil pump 2 is at the maximum, and when the throttle rod pin 28 is at the rear end of the waist-shaped hole 27, the high-pressure oil pump 2 is in an initial oil cut-off state. The amount of oil added and the amount of oil reduced by the high-pressure oil pump 2 can be controlled by the ECU. That is to say, in the specific implementation process, the electric speed regulator 1 can be connected to the ECU, and the ECU controls the operation of the electric speed regulator 1, and then controls the position of the push rod 11, thereby controlling the amount of oil added or the amount of oil reduced by the oil pump. The ECU, as an on-board computer, belongs to the existing technology. The ECU can monitor the oil demand of each component, and then control the amount of oil added or the amount of oil reduced by the oil pump to meet the oil demand of each component.

[0026] In this embodiment, if Figure 4As shown, a second mounting surface 102 is provided on the cylinder body 100, and the high-pressure oil pump 2 is installed on the second mounting surface 102. In this embodiment, a window is provided on the second mounting surface 102, and a screw hole is provided on the outer edge of the window. The high-pressure oil pump 2 is installed on the second mounting surface 102 by locking screws, and the bottom of the high-pressure oil pump 2 is located in the window. A third mounting surface 104 is provided on the other side of the cylinder body 100, and a connecting stop 105 and a camshaft mounting hole 103 are provided on the third mounting surface 104. The camshaft 23 of the high-pressure oil pump 2 is installed in the cam mounting hole. Optionally, the second mounting surface 102 and the third mounting surface 104 are perpendicular, as shown in FIG. Figure 3 As shown, a timing adjustment gasket 24 is installed between the high-pressure oil pump 2 and the cylinder body 100. The timing adjustment gasket 24 can be grouped according to thickness. When installing the high-pressure oil pump 2, the timing adjustment gasket 24 can be reasonably selected or the timing adjustment gasket 24 can be superimposed according to needs.

[0027] In this embodiment, the electric speed regulator 1 is installed on the third mounting surface 104, the front end of the electric speed regulator 1 is transition-fitted in the connecting stop 105, and the push rod 11 is inserted into the connecting stop 105. Optionally, the front end surface of the electric speed regulator 1 is provided with a raised boss, and the boss is transition-fitted in the connecting stop 105. Through the transition fit between the boss and the connecting stop 105, the position of the electric speed regulator 1 can be positioned, and the electric speed regulator 1 and the cylinder body 100 are connected by bolts or screws. When the electric speed regulator 1 and the cylinder body 100 are installed, a sealing gasket is also installed between the electric speed regulator 1 and the cylinder body 100.

[0028] In this embodiment, if Figure 1As shown, the engine fuel system also includes a low-pressure oil pump 3, which is installed on the cylinder body 100 and is located on one side of the high-pressure oil pump 2. A low-pressure oil inlet pipeline 32 is provided on the low-pressure oil pump 3, and the outlet end of the low-pressure oil inlet pipeline 32 is connected to the high-pressure oil pump 2. A high-pressure oil pipe 21 is provided on the high-pressure oil pump 2, and an injector 5 is provided at the oil outlet end of the high-pressure oil pipe 21. The low-pressure oil pump 3 supplies oil to the high-pressure oil pump 2, and then when the high-pressure oil pump 2 works, the oil is transported to the injector 5 through the high-pressure oil pipe 21, and the injector 5 sprays the oil to the oil-using parts. Further, a first oil return pipeline 22 is provided on the injector 5, and the first oil return pipeline 22 is connected to a three-way joint 4, one joint of the three-way joint 4 is connected to a third oil return pipeline 42, and the other joint of the three-way joint 4 is connected to a second oil return pipeline 41, and the second return oil return pipeline 42 is connected to the third oil return pipeline 42. The oil pipeline 41 is connected to the high-pressure oil pump 2, and the third oil return pipeline 42 is connected to the low-pressure oil pump 3. One-way valves are provided in the first oil return pipeline 22, the second oil return pipeline 41 and the third oil return pipeline 42. Excess oil enters the three-way joint 4 through the first oil return pipeline 22 and the second oil return pipeline 41, and then the aggregated return oil enters the oil inlet joint 31 through the third oil return pipeline 42, and then enters the low-pressure oil pump 3 after passing through the oil inlet joint 31. Optionally, an oil inlet joint 31 is provided on the low-pressure oil pump 3, and the third oil return pipeline 42 is connected to the oil inlet joint 31. One end of the oil inlet joint 31 is connected to the oil tank, and the other end of the oil inlet joint 31 is connected to the third oil return pipeline 42. The oil in the third oil return pipeline 42 and the oil in the oil tank merge at the oil inlet joint 31 and then enter the low-pressure oil pump 3.

[0029] In this embodiment, a first mounting surface 101 is opened on the cylinder body 100, and the first mounting surface 101 is located on one side of the second mounting surface 102 of the cylinder body 100. The low-pressure oil pump 3 is installed on the first mounting surface 101. Optionally, the low-pressure oil pump 3 is installed on the first mounting surface 101 by screws.

[0030] In this embodiment, the low-pressure oil pump 3 is preferably an electronically controlled low-pressure oil pump 3, which can work continuously and stably after being powered on; and the high-pressure oil pump 2 is preferably a mechanical roller injection pump, which is driven by an oil pump cam with a lift, and supplies oil to the injectors 5 in turn. A fuel cut-off solenoid valve is installed on the high-pressure oil pump 2. When the fuel cut-off solenoid valve is opened, the diesel fuel supply path is immediately cut off to prevent accidents and achieve rapid engine shutdown.

[0031] In this embodiment, the oil return pipeline and the oil inlet pipeline are both made of rubber or seamless steel pipes.

[0032] The working process of the utility model is as follows: the low-pressure oil pump 3 works, and the oil in the fuel tank and / or the oil in the third oil return pipeline 42 is delivered to the high-pressure oil pump 2 through the low-pressure oil inlet pipeline 32. The high-pressure oil pump 2 delivers the oil to the injector 5 through the high-pressure oil pipe 21. The excess oil enters the three-way joint 4 through the first oil return pipeline 22. The excess fuel entering the high-pressure oil pump 2 also enters the three-way joint 4 through the second oil return pipeline 41. After being collected, it enters the oil inlet joint 31 through the third oil return pipeline 42, and then the return oil is mixed with After the oil in the oil tank is merged, it is finally transported to the high-pressure oil pump 2 through the low-pressure oil pump 3. Preferably, the return oil directly enters the oil inlet joint 31 through the third oil return pipeline 42. When the high-pressure oil pump 2 needs to increase the oil supply, the push rod of the electric speed governor 1 extends, thereby pushing the rack 25 forward to achieve the control of refueling of the high-pressure oil pump 2. When the high-pressure oil pump 2 needs to reduce the oil supply, the push rod of the electric speed governor 1 retracts, and the rack 25 moves backward under the action of the return spring 26 to achieve the control of reducing the oil supply of the high-pressure oil pump 2.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An engine oil control mechanism, comprising a cylinder body, a high-pressure oil pump is mounted on the cylinder body, and the high-pressure oil pump has a rack for adjusting the amount of oil, characterized in that: One end of the rack protrudes from the pump housing of the high-pressure oil pump, the rack is provided with a raised throttle rod pin, the pump housing of the high-pressure oil pump is provided with a waist-shaped hole, the throttle rod pin of the high-pressure oil pump is inserted into the waist-shaped hole, a return spring is installed on the pump housing where the waist-shaped hole is located, one end of the return spring is connected to the throttle rod pin, an electric speed regulator is installed on the cylinder body, and the push rod of the electric speed regulator is in contact with the end face of the rack.

2. An engine oil control mechanism according to claim 1, characterized in that: The cylinder body is provided with a second mounting surface, and the high-pressure oil pump is mounted on the second mounting surface.

3. An engine oil control mechanism according to claim 2, characterized in that: A timing adjustment gasket is installed between the high-pressure oil pump and the cylinder body.

4. An engine oil control mechanism according to any one of claims 1 to 3, characterized in that: A third mounting surface is provided on the cylinder body, a connecting stop and a camshaft mounting hole are provided on the third mounting surface, the camshaft of the high-pressure oil pump is mounted in the camshaft mounting hole, the electric speed regulator is mounted on the third mounting surface, the front end of the electric speed regulator is transitionally fitted in the connecting stop, and the push rod is inserted into the connecting stop.

5. An engine oil control mechanism according to claim 4, characterized in that: A sealing gasket is also installed between the electric speed regulator and the cylinder body.

6. An engine fuel system, characterized in that: The engine oil control mechanism comprises the engine oil control mechanism as described in any one of claims 1 to 5, and also comprises a low-pressure oil pump, wherein the low-pressure oil pump is mounted on the cylinder body and is located on one side of the high-pressure oil pump, a low-pressure oil inlet pipeline is arranged on the low-pressure oil pump, an outlet end of the low-pressure oil inlet pipeline is connected to the high-pressure oil pump, a high-pressure oil pipe is arranged on the high-pressure oil pump, and an injector is arranged at the oil outlet end of the high-pressure oil pipe.

7. An engine fuel system according to claim 6, characterized in that: The injector is provided with a first oil return pipeline, a three-way joint is connected to the first oil return pipeline, one joint of the three-way joint is connected to the third oil return pipeline, the other joint of the three-way joint is connected to the second oil return pipeline, the second oil return pipeline is connected to the high-pressure oil pump, the third oil return pipeline is connected to the low-pressure oil pump, and the first oil return pipeline, the second oil return pipeline and the third oil return pipeline are all provided with a one-way valve.

8. An engine fuel system according to claim 7, characterized in that: The low-pressure oil pump is provided with an oil inlet joint, and the third oil return pipeline is connected to the oil inlet joint.

9. An engine fuel system according to claim 6, characterized in that: The cylinder body is provided with a first mounting surface, the first mounting surface is located on one side of the second mounting surface of the cylinder body, and the low-pressure oil pump is mounted on the first mounting surface.

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