A solenoid control valve for engine piston cooling nozzle with opening pressure

Abstract

The present invention discloses an electromagnetic control valve with an engine piston cooling nozzle with opening pressure, comprising an electromagnetic coil part and a valve body connected to the electromagnetic coil part; the electromagnetic coil part comprises a housing, a coil arranged on the inner side of the housing, a yoke arranged on the circumference of the coil and used to form a magnetic circuit, and a plunger arranged on the inner side of the yoke; an inner cover is arranged on the inner side of the yoke; the valve body comprises a valve sleeve, and an oil inlet and an oil outlet are provided on the side wall of the valve sleeve; a ejector pin, a valve core and a spring are arranged in sequence from top to bottom inside the valve sleeve, and the valve core comprises a first valve core and a second valve core that are independent of each other; the first valve core and the second valve core can reciprocate axially in the valve sleeve. The present invention designs the valve core into a two-stage structure that is independent of each other, namely the first valve core and the second valve core, by modifying the valve core; thereby being able to adjust the opening or closing of the oil outlet and the working state according to the size of the oil inlet pressure, and avoiding the waste of lubricating oil.

Description

Technical Field

[0001] The invention relates to the technical field of engine electromagnetic control valves, and in particular to an electromagnetic control valve of an engine piston cooling nozzle with an opening pressure. Background Art

[0002] With the development of the automobile industry and the application of technologies such as supercharging and high compression ratio, the combustion temperature of the engine is getting higher and higher, and the ambient temperature of the piston is also getting higher and higher, which is prone to deflagration, which is very unfavorable to the lubrication, life of the piston and the smoothness of the engine. Since the engine piston cooling system is widely used in automobiles, it is of great significance to reduce piston wear, extend piston life and ensure the smooth operation of the engine.

[0003] The electromagnetic control valves for engine piston cooling nozzles currently on the market have relatively simple structures and functions, and are mainly normally open valves, that is, the oil inlet and oil outlet of the electromagnetic control valve remain normally open, and lubricating oil will flow out of the oil outlet regardless of the oil inlet pressure. In this way, when the oil inlet pressure is too low, the lubricating oil at the oil outlet will hardly achieve the effect of piston cooling, resulting in a certain degree of waste. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an electromagnetic control valve for an engine piston cooling nozzle with an opening pressure. By designing the valve core as a first valve core and a second valve core that are independent of each other, the opening or closing of the oil outlet can be adjusted according to the size of the oil inlet pressure, and the working state can be adjusted, thereby avoiding the waste of lubricating oil.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] An electromagnetic control valve of an engine piston cooling nozzle with an opening pressure comprises an electromagnetic coil portion and a valve body connected to the electromagnetic coil portion; wherein:

[0007] The electromagnetic coil unit includes a housing, a coil disposed inside the housing, a yoke disposed around the coil to form a magnetic circuit, and a plunger disposed inside the yoke; an inner cover is disposed inside the yoke;

[0008] The valve body includes a valve sleeve, which is a hollow columnar type, and an oil inlet and an oil outlet are formed on its side wall; a ejector pin, a valve core and a spring are sequentially arranged inside the valve sleeve from top to bottom, and the valve core includes a first valve core and a second valve core which are independent of each other, and the longitudinal section of the second valve core is stepped, including an upper valve core body located at the top and a lower valve core body located at the bottom, and the diameter of the upper valve core body is smaller than the diameter of the lower valve core body; the first valve core and the second valve core can reciprocate axially in the valve sleeve.

[0009] In a further solution, an L-shaped bracket is installed on the outside of the shell; the solenoid control valve can be installed on the engine through the L-shaped bracket.

[0010] In a further solution, the lower end of the shell is connected to the upper end of the valve sleeve, and a first sealing ring is arranged between the lower end of the shell and the upper end of the valve sleeve; a second sealing ring is arranged on the outside of the valve sleeve; and a third sealing ring is arranged between the inner cover and the shell.

[0011] A further solution is that the valve sleeve is made of cast aluminum; the cast aluminum processing method is adopted to reduce the processing allowance, ensure accuracy, improve efficiency and reduce costs.

[0012] The beneficial effects of the present invention are as follows:

[0013] (1) The present invention transforms the valve core and designs it into two independent sections, namely the first valve core and the second valve core; thereby, the opening or closing of the oil outlet can be adjusted according to the size of the oil inlet pressure, and the working state can be adjusted to avoid the waste of lubricating oil.

[0014] (2) The electromagnetic control valve used in the engine piston cooling system of the present invention has a simple structure, high precision, simple assembly process, and good reliability.

[0015] (3) The valve sleeve is made of cast aluminum to reduce processing allowance, ensure accuracy, improve efficiency and reduce costs.

[0016] (4) The present invention adds an inner cover on the inner side of the yoke to reduce the manufacturing precision of the yoke and reduce the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the electromagnetic control valve of the present invention in a non-powered state;

[0018] Figure 2 It is a structural schematic diagram of the electromagnetic control valve of the present invention when the oil pressure at the oil inlet reaches the opening pressure;

[0019] Figure 3 It is a structural schematic diagram of the electromagnetic control valve of the present invention in a power-on state;

[0020] Figure markings: 1-housing, 2-coil, 3-yoke, 4-plunger, 5-inner cover, 6-valve sleeve, P-oil inlet, A-oil outlet, 7-thrust needle, 8-spring, 9-first valve core, 101-upper valve core body, 102-lower valve core body, 11-L-shaped bracket, 12-first sealing ring, 13-second sealing ring, 14-third sealing ring. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 of the present invention. Terms such as "installed", "connected", "connected", "fixed" and the like 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 directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] like Figure 1-3 As shown, an electromagnetic control valve of an engine piston cooling nozzle with an opening pressure includes an electromagnetic coil portion and a valve body connected to the electromagnetic coil portion; wherein:

[0024] The electromagnetic coil part includes a shell 1, a coil 2 arranged on the inner side of the shell 1, a yoke 3 arranged on the peripheral side of the coil 2 and used to form a magnetic circuit, and a plunger 4 arranged on the inner side of the yoke 3; an inner cover 5 is arranged on the inner side of the yoke 3; in order to facilitate the installation of the electromagnetic control valve on the engine, an L-shaped bracket 11 is installed on the outside of the shell 1, and the installation of the electromagnetic control valve can be achieved through the L-shaped bracket 11.

[0025] The valve body includes a valve sleeve 6, which is a hollow columnar type, and its side wall is provided with an oil inlet P and an oil outlet A; a ejector pin 7, a valve core and a spring 8 are arranged in sequence from top to bottom inside the valve sleeve 6, and the valve core includes a first valve core 9 and a second valve core which are independent of each other, and the longitudinal section of the second valve core is stepped, including an upper valve core body 101 located at the top and a lower valve core body 102 located at the bottom, and the diameter of the upper valve core body 101 is smaller than the diameter of the lower valve core body 102; the first valve core 9 and the second valve core can axially reciprocate in the valve sleeve 6.

[0026] As a more preferred embodiment, the lower end of the housing 1 is connected to the upper end of the valve sleeve 6, a first sealing ring 12 is arranged between the lower end of the housing 1 and the upper end of the valve sleeve 6; a second sealing ring 13 is arranged outside the valve sleeve 6; a third sealing ring 14 is arranged between the inner cover 5 and the housing 1. The valve sleeve 6 is made of cast aluminum, and the cast aluminum processing method is adopted to reduce the processing allowance, ensure accuracy, improve efficiency and reduce costs.

[0027] The working principle of the present invention is as follows: the present invention transforms the valve core into two independent sections, namely the first valve core 9 and the second valve core; the longitudinal section of the second valve core is stepped, including an upper valve core body 101 located at the top and a lower valve core body 102 located at the bottom, and the diameter of the upper valve core body 101 is smaller than that of the lower valve core body 102. Figure 1 As shown): Under the elastic force of the spring 8, the upper valve core body 101 is located at the oil inlet P, and the lower valve core body 102 is located at the oil outlet A. Since the diameter of the upper valve core body 101 is smaller than that of the lower valve core body 102, the oil inlet P is open and the oil outlet A is closed, and the device is in a non-oil supply state; when the oil pressure at the oil inlet P rises to a certain value, the oil pressure exerts a downward force on the lower valve core body 102 through the top surface of the lower valve core body 102. At this time, the lower valve core body 102 compresses the spring 8 and moves downward, so that the oil inlet P and the oil outlet A are both in an open state, and oil supply begins (as shown in FIG. Figure 2 When the engine temperature is low, the electromagnetic control valve is energized, and the plunger 4 moves downward, driving the first valve core 9 to move downward, thereby closing the oil inlet A and stopping the oil supply (as shown in FIG. Figure 3 As shown). The oil outlet A of the solenoid control valve will not open when the oil pressure of the engine lubrication system is too low; when the oil pressure of the lubrication system reaches a certain pressure, the oil outlet will automatically open under the action of the oil pressure and the spring, and start to supply oil to the piston for cooling. In this way, the working state can be adjusted according to the size of the oil inlet pressure, which can avoid the waste of lubricating oil.

Claims

1. An electromagnetic control valve for an engine piston cooling nozzle with an opening pressure, comprising an electromagnetic coil portion and a valve body connected to the electromagnetic coil portion; wherein: The electromagnetic coil unit includes a housing, a coil disposed inside the housing, a yoke disposed around the coil to form a magnetic circuit, and a plunger disposed inside the yoke; an inner cover is disposed inside the yoke; The valve body includes a valve sleeve, which is a hollow columnar type, and its side wall is provided with an oil inlet and an oil outlet; a ejector pin, a valve core and a spring are sequentially arranged inside the valve sleeve from top to bottom, and is characterized in that: the valve core includes a first valve core and a second valve core which are independent of each other, and the longitudinal section of the second valve core is stepped, including an upper valve core body located at the top and a lower valve core body located at the bottom, and the diameter of the upper valve core body is smaller than the diameter of the lower valve core body; the first valve core and the second valve core can reciprocate axially in the valve sleeve.

2. The electromagnetic control valve according to claim 1, characterized in that: An L-shaped bracket is installed outside the shell.

3. The electromagnetic control valve according to claim 1, characterized in that: The lower end of the shell is connected to the upper end of the valve sleeve, and a first sealing ring is arranged between the lower end of the shell and the upper end of the valve sleeve.

4. The electromagnetic control valve according to claim 1, characterized in that: A second sealing ring is arranged outside the valve sleeve.

5. The electromagnetic control valve according to claim 1, characterized in that: A third sealing ring is arranged between the inner cover and the shell.

6. The electromagnetic control valve according to claim 1, characterized in that: The valve sleeve is made of cast aluminum.

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