An electromagnetic control valve for a lubricating system of a diesel engine

Abstract

This invention discloses an electromagnetic control valve for a diesel engine lubrication system, relating to the field of electromagnetic valves. The invention features a simple structure. By adjusting the fit between the components of the electromagnetic control valve, an oil drain port is provided at the front end of the valve sleeve, and two annular grooves are provided on the circumference, forming a first oil outlet and a second oil outlet at the second annular groove. Simultaneously, the dimensions of the two oil outlets are adjusted so that the amount of lubricating oil discharged from the oil pump regulating chamber through the second oil outlet is greater than the amount of lubricating oil flowing into the oil pump regulating chamber from the oil inlet through the first oil outlet. Compared to existing electromagnetic hydraulic control valves, this invention offers a wider range of hydraulic oil quantity adjustment, higher precision, and more sensitive response. Even when the electromagnetic valve fails due to power loss, it can still automatically open under oil pressure to adjust the oil pump output.

Description

Technical Field

[0001] This invention relates to the field of solenoid valves, specifically an electromagnetic control valve for a diesel engine lubrication system. Background Technology

[0002] With social development, energy conservation and emission reduction are inevitable trends, and therefore the demand for energy conservation and emission reduction in engines as drive systems is becoming increasingly strong.

[0003] In existing technologies, diesel engines require lubricating oil to lubricate their structure. However, in actual use, the electromagnetic control valve used to regulate the amount of lubricating oil entering and leaving the engine has low adjustment accuracy and slow adjustment speed, which cannot meet the lubricating oil requirements of the diesel engine oil pump under different engine operating conditions. Summary of the Invention

[0004] The purpose of this invention is to provide an electromagnetic control valve for a diesel engine lubrication system, which solves the problems mentioned in the background art by adaptively adjusting the structure of the electromagnetic control valve and the size of the inlet and outlet ports.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An electromagnetic control valve for a diesel engine lubrication system includes a valve sleeve portion and a coil portion. The valve sleeve portion includes a valve sleeve and a valve core disposed within the valve sleeve and capable of sliding along the valve sleeve axial direction. The outer surface of the valve core forms two flanges, with the flange closer to the coil portion having a smaller diameter than the flange farther from the coil portion. The inner wall of the valve sleeve matches the shape of the outer flange of the valve core. A support is fixedly connected to the side of the valve sleeve away from the coil portion, and an elastic element is provided between the support and the valve core.

[0007] The valve sleeve is cylindrical and hollow, and its outer surface has a first annular groove and a second annular groove. An oil inlet is provided at the first annular groove and communicates with the hollow cavity. A first oil outlet is provided at the second annular groove and communicates with the oil inlet. A second oil outlet is formed on the side surface of the valve sleeve near the oil outlet and communicates with the oil outlet.

[0008] The coil section, from the outside to the inside, includes a housing, a coil disposed in the housing, an inner cover disposed in the coil, and a plunger disposed in the inner cover, wherein the plunger is fixedly connected to a ejector pin.

[0009] As a further aspect of the present invention: the inner diameter of the valve sleeve on the side closer to the coil is smaller than the inner diameter on the side farther from the coil, and the inner diameter of the valve sleeve matches the outer diameter of the valve core.

[0010] As a further aspect of the present invention: the radial cross-sectional shape of the second oil outlet is U-shaped.

[0011] As a further aspect of the present invention: the oil output of the second oil outlet is greater than the oil output of the first oil outlet.

[0012] As a further aspect of the present invention: the valve sleeve is fixedly connected to a filter screen at both the first annular groove and the second annular groove.

[0013] As a further embodiment of the present invention: a front yoke is provided between the plunger and the valve core, a rear yoke is provided at the end of the coil away from the front yoke, and a bracket is provided at the lower part of the coil.

[0014] As a further aspect of the present invention, sealing rings are provided on the outer sides of both the valve sleeve and the front yoke.

[0015] As a further aspect of the present invention: the coil includes a frame and enameled wire wound on the frame, the frame being cylindrical.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention has a novel structure. By adjusting the matching relationship between the structures of the electromagnetic control valve, an oil drain port is set at the front end of the valve sleeve, and two annular grooves are set around the periphery, forming a first oil outlet and a second oil outlet at the second annular groove. At the same time, the adjustment of the size of the two oil outlets makes the amount of lubricating oil discharged from the oil pump regulating chamber through the second oil outlet greater than the amount of lubricating oil flowing into the oil pump regulating chamber from the oil inlet through the first oil outlet. Compared with the electromagnetic hydraulic control valve in the prior art, the present invention has a wider range of hydraulic oil quantity adjustment, higher precision, and more sensitive response. When the electromagnetic valve fails due to power failure, it can still open spontaneously under the action of oil pressure to adjust the oil pump output. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the axial cross-sectional structure of an electromagnetic hydraulic control valve.

[0018] Figure 2 A schematic diagram of the overall structure of an electromagnetic hydraulic control valve;

[0019] Figure 3 This is a front view of an electromagnetic hydraulic control valve;

[0020] Figure 4 This is a top view of an electromagnetic hydraulic control valve;

[0021] Figure 5 This is a schematic diagram of the front cross-sectional structure of an electromagnetic hydraulic control valve.

[0022] Figure 6 This is a top view cross-sectional structural diagram of an electromagnetic hydraulic control valve;

[0023] Figure 7 This is a schematic diagram of the valve core in an electromagnetic hydraulic control valve.

[0024] In the diagram: 10-Support, 11-Valve sleeve, 12-Elastic element, 13-Valve core, 14-Filter screen, 15-Sealing ring, 16-Pin, 20-Bracket, 30-Housing, 31-Plunger, 32-Inner cover, 33-Coil, 34-Rear yoke, 35-Frame, 36-Enameled wire, 37-Gasket, 38-Front yoke, 41-Oil inlet, 42-First oil outlet, 43-Second oil outlet, 43-Oil drain. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In this embodiment of the invention, an electromagnetic control valve for a diesel engine lubrication system includes a valve sleeve portion and a coil portion. The valve sleeve portion includes a valve sleeve 11, a valve core 13 disposed within the valve sleeve 11 and capable of sliding along the axial direction of the valve sleeve 11, a support 10 fixed to one side of the valve sleeve 11, and an elastic member 12 disposed between a spring seat and the valve core 13.

[0027] like Figure 7 The valve core has two flanges on its outer surface, with the flange closer to the coil having a smaller diameter than the flange farther from the coil. The flanges on the valve core inside the valve sleeve are matched in shape. The inner diameter of the valve sleeve closer to the coil is smaller than the inner diameter farther from the coil, and the inner diameter of the valve sleeve matches the outer diameter of the valve sleeve. By setting different radial cross-sectional diameters for the valve sleeve and the valve core, and matching a suitable spring, the solenoid valve has a safe opening pressure. That is, the solenoid valve can automatically open under oil pressure when not energized to regulate the oil pump output. The above principle is as follows: by adjusting the structure of the valve sleeve of the solenoid valve, the inner diameter of the valve sleeve closer to the coil is smaller than the inner diameter farther from the coil; at the same time, two flanges are formed on the outer surface of the valve core, with the flange closer to the coil having a smaller diameter than the flange farther from the coil. Thus, the valve core is subjected to downward hydraulic pressure, which compresses the spring.

[0028] The support 10 can be, but is not limited to, being fixedly installed inside the valve sleeve 11, and the elastic coefficient of the elastic element 12 can be selected and set as needed. With the cooperation of the support 10 and the elastic element 12, the valve core 13 can reciprocate within the valve sleeve 11. Simultaneously, when the electromagnetic control valve is not energized, oil pressure counteracts the elastic force of the elastic element 12, enabling the safe opening of the electromagnetic control valve to regulate the oil pump output. Compared to existing electromagnetic control valves that can only be used when energized, the electromagnetic control valve of this invention has a safe opening pressure, enabling the regulation of engine lubricating oil volume without energization under special circumstances.

[0029] The valve sleeve 11 is cylindrical and hollow, with a first annular groove and a second annular groove formed on its outer surface. An oil inlet 41 communicating with the hollow cavity is provided at the first annular groove, and a first oil outlet 42 communicating with the oil inlet 41 is provided at the second annular groove. A second oil outlet 43 communicating with the oil outlet 43 is formed on the side of the valve sleeve 11 near the oil drain port 43. Both the first oil outlet 42 and the second oil outlet 43 are connected to the oil pump regulating chamber. The working principle of the hydraulic control valve in this invention is as follows: when the solenoid valve is energized, lubricating oil flows from the main oil passage through the solenoid valve's oil inlet 41, through the first oil outlet 42, to the oil pump regulating chamber; when the solenoid valve is de-energized, the lubricating oil returns from the oil pump regulating chamber through the second oil outlet 43 to the oil pan, thereby increasing the amount of lubricating oil pumped out by the oil pump.

[0030] The second oil outlet 43 has a U-shaped radial cross-section, and its oil output is greater than that of the first oil outlet 42. Compared to existing electromagnetic hydraulic control valves with only one circular oil outlet, the second oil outlet 43 with a U-shaped radial cross-section in this application has a larger oil output. In actual use, the electromagnetic hydraulic control valve can achieve a greater amount of lubricating oil discharged from the oil pump regulating chamber through the second oil outlet 43 and then through the drain port 43 than the amount of lubricating oil flowing from the main oil passage through the electromagnetic inlet 41 and then through the first oil outlet 42 to the oil pump regulating chamber. This results in a wider range of hydraulic oil quantity adjustment, higher precision, and faster adjustment response from the electromagnetic control valve.

[0031] The valve sleeve 11 is fixedly connected to a filter screen 14 at the positions of the first annular groove and the second annular groove.

[0032] The coil 33, from the outside in, includes a housing 30, a coil 33 disposed within the housing 30, an inner cover 32 disposed within the coil 33, a plunger 31 disposed within the inner cover 32, and a gasket 37 for limiting the plunger. A push-fit pin 16 is press-fitted to the plunger 31, fixing the pin 16 and plunger 31 in place. A front yoke 38 is provided between the plunger 31 and the valve core 13, and a rear yoke 34 is provided at the end of the coil 33 away from the front yoke 38. A bracket 20 is provided at the lower part of the coil 33. The electromagnetic hydraulic control valve of this invention can control the flow rate of the electromagnetic control valve according to the engine operating conditions via commands issued by the ECU. When the electromagnetic control valve is energized, lubricating oil flows from the oil pan to the oil pump regulating chamber; when the electromagnetic control valve is de-energized, lubricating oil returns from the oil pump regulating chamber to the oil pan. This application has a simple structure, high precision, simple assembly process, and high reliability.

[0033] Both the valve sleeve 11 and the front yoke 38 are provided with sealing rings 15 on their outer sides to ensure the sealing performance of the electromagnetic control valve. The coil 33 includes a frame 35 and enameled wire 36 wound on the frame 35. The frame 35 is cylindrical, and the enameled wire 36 is wound on it to form the coil 33. The lower part of the coil 33 is provided with a bracket 20 for supporting the electromagnetic hydraulic control valve.

[0034] This invention features a novel structure and stable operation. During use, by adjusting the coordination between the structures of the electromagnetic control valve, an oil drain port 43 is positioned at the front end of the valve sleeve 11, with two oil outlets on its circumference. Simultaneously, the size of the two oil outlets is adjusted so that the amount of lubricating oil discharged from the oil pump regulating chamber through the second oil outlet 43 is greater than the amount of lubricating oil flowing into the oil pump regulating chamber through the oil inlet 41 and the first oil outlet 42. Compared to existing electromagnetic control valves with only one circular oil outlet, this invention expands the oil pump's oil pressure regulation range, offering high regulation accuracy and sensitive response. Furthermore, even when the electromagnetic valve fails due to power loss, oil pressure can be used to safely open the electromagnetic control valve, allowing it to still function as an oil pressure regulator.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electromagnetic control valve for a diesel engine lubrication system, characterized in that, The device includes a valve sleeve and a coil. The valve sleeve includes a valve sleeve and a valve core disposed inside the valve sleeve and capable of sliding along the valve sleeve axis. The outer surface of the valve core forms two flanges, with the diameter of the flange closer to the coil being smaller than the diameter of the flange farther from the coil. The inner wall of the valve sleeve matches the shape of the flanges on the outer surface of the valve core. A support is fixedly connected to the side of the valve sleeve away from the coil, and an elastic element is provided between the support and the valve core. The valve sleeve is cylindrical and hollow, and its outer surface has a first annular groove and a second annular groove. An oil inlet is provided at the first annular groove and communicates with the hollow cavity. A first oil outlet is provided at the second annular groove and communicates with the oil inlet. An oil drain port is provided at the front end of the valve sleeve. A second oil outlet is formed on the side surface of the valve sleeve near the oil drain port and communicates with the oil drain port. The coil section, from the outside to the inside, includes a housing, a coil disposed in the housing, an inner cover disposed in the coil, a plunger disposed in the inner cover, and a gasket that limits the plunger. The plunger is fixedly connected to the ejector pin. The radial cross-sectional shape of the second oil outlet is U-shaped. The oil output of the second oil outlet is greater than that of the first oil outlet, so that the amount of lubricating oil discharged from the oil pump regulating chamber through the second oil outlet and the drain port is greater than the amount of lubricating oil flowing from the main oil passage through the electromagnetic oil inlet and the first oil outlet to the oil pump regulating chamber.

2. The electromagnetic control valve for a diesel engine lubrication system according to claim 1, characterized in that, The inner diameter of the valve sleeve on the side closer to the coil is smaller than the inner diameter on the side farther from the coil, and the inner diameter of the valve sleeve matches the outer diameter of the valve core.

3. The electromagnetic control valve for a diesel engine lubrication system according to claim 1, characterized in that, The valve sleeve is fixedly connected to a filter screen at both the first and second annular grooves.

4. The electromagnetic control valve for a diesel engine lubrication system according to claim 1, characterized in that, A front yoke is provided between the plunger and the valve core, and a rear yoke is provided at the end of the coil away from the front yoke. A bracket is provided at the lower part of the coil.

5. The electromagnetic control valve for a diesel engine lubrication system according to claim 4, characterized in that, Both the valve sleeve and the outer side of the front yoke are provided with sealing rings.

6. The electromagnetic control valve for a diesel engine lubrication system according to claim 4, characterized in that, The coil includes a frame and enameled wire wound on the frame, the frame being cylindrical.

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