CN209925043U - Low power consumption and quick response piston engine valve unit - Google Patents

Abstract

The utility model provides a low-power consumption and fast-response piston engine valve device, comprising a valve stem, an elastic component and a permanent magnet; the valve stem has a first end and a second end; the elastic component is arranged on the valve stem and is located between the first end and the second end; the permanent magnet is arranged between the elastic component and the first end; the permanent magnet can exert an attractive force on the first end; and the permanent magnet can exert an attractive force on the elastic component.

Description

Low power consumption and quick response piston engine valve unit

technical field

The utility model relates to the technical field of engines, in particular to a piston engine valve device with low power consumption and quick response.

Background technique

The valve is used to control the opening and closing of the intake and exhaust holes above the combustion chamber of the piston engine. The opening of the valve is generally driven by the valve cam in the engine, and the closing of the valve is controlled by the valve spring. In order to overcome the inertial force of the valve and the transmission parts during the valve closing process, to ensure the timely seating of the valve, and the tight fit between the valve and the valve seat, the valve spring must have a certain stiffness and preload. If the stiffness and preload of the valve spring are too small, it will cause valve rebound, poor valve closing, and excessive valve closing time, which will further cause insufficient engine power and affect engine power and efficiency. If the stiffness and preload of the valve spring are too large, it will make it difficult for the cam to open the valve, the contact wear will increase, and at the same time, the internal load of the engine will be increased, the additional power loss of the engine will be increased, and the fuel consumption rate will be increased. Because the valve spring also affects the valve clearance, and the valve clearance directly affects the tightness of the valve and the valve seat, the response speed of the valve switch and the lift of the valve. Excessive valve clearance will cause the valve to open late and close early, resulting in reduced valve lift, shortened opening time, and reduced valve opening. For the intake valve, the amount of air entering the cylinder is smaller than the normal value, the filling of fresh air or oil and gas is insufficient, and the phenomenon of oil-rich combustion occurs in the cylinder. For the exhaust valve, the excessive clearance will cause the exhaust gas to be smaller than the normal value, which will also reduce the filling amount, resulting in a reduction in the output power of the engine, and it is also not conducive to the cooling of the cylinder head. If the valve clearance is too small, the valve will open early and close later, the valve opening time will be longer, the valve lift will increase, and the valve opening will become larger. For the intake valve, early opening will cause the fresh mixture entering the cylinder to be directly discharged from the exhaust valve, and the economy of the engine will deteriorate; if the intake valve is closed too late, the fresh mixture that has entered the cylinder will pass through the intake valve. The valve is pressed back into the intake pipe, reducing the amount of cylinder filling, thereby reducing the output of the engine. For the exhaust valve, the early opening of the exhaust valve will shorten the process of expansion and work, resulting in a loss of engine power; if the exhaust valve is closed late, the fresh air mixture entering the cylinder will be directly discharged to the atmosphere through the exhaust valve, and also Deteriorating the economy of the engine. Also, due to fatigue or other defects, the valve springs can break, causing the valve to come off.

Utility model content

In order to solve at least one of the above technical problems, the present invention provides a piston engine valve device with low power consumption and quick response, which is realized by the following technical solutions.

An engine valve device includes a valve stem, an elastic assembly and a permanent magnet; the valve stem has a first end and a second end; the elastic assembly is arranged on the valve stem and is located between the first end and the second end; The permanent magnet is arranged between the elastic component and the first end; the permanent magnet can exert an attractive force on the first end; the permanent magnet can exert an attractive force on the elastic component.

According to at least one embodiment of the present invention, the elastic assembly includes an elastic part and an elastic part base; the elastic part and the elastic part base are located inside the cylinder block of the engine; the elastic part base is fixed on the valve stem; one end of the elastic part It is fixedly connected with the base of the elastic part, and the other end is pressed on the cylinder block of the engine.

According to at least one embodiment of the present invention, it also includes a valve cam; the first end of the valve stem is a valve tappet, and the second end is a valve head; the valve cam can apply a pushing force to the valve tappet.

According to at least one embodiment of the present invention, when the valve cam exerts a pushing force on the valve tappet, the valve stem moves in the first direction, the distance between the permanent magnet and the valve tappet gradually decreases, and the attractive force increases rapidly, The distance between the permanent magnet and the base of the elastic part increases gradually, and the attractive force decreases rapidly.

According to at least one embodiment of the present invention, when the valve cam does not exert a pushing force on the valve lifter, the valve stem moves in the second direction under the elastic force of the elastic member, and the distance between the permanent magnet and the valve lifter gradually increases , the attractive force decreases rapidly, the distance between the permanent magnet and the base of the elastic component decreases gradually, and the attractive force increases rapidly.

According to at least one embodiment of the present invention, a valve seat is further included, the valve seat is arranged on the cylinder block of the engine; with the reciprocating motion of the valve stem, the valve head can be closed or opened with the valve seat.

According to at least one embodiment of the present invention, a magnet base is further included; the magnet base is fixedly connected with the cylinder block of the engine and used for fixing the permanent magnet.

According to at least one embodiment of the present invention, both the first end and the second end of the valve stem are made of ferromagnetic material.

According to at least one embodiment of the present invention, the elastic member is a spring, and the base of the elastic member is a spring base.

According to at least one embodiment of the present invention, the magnet base has a fracture, and the permanent magnet is clamped on the magnet holder through the fracture.

According to at least one embodiment of the present invention, the fracture is a trapezoidal fracture or a stepped fracture.

According to at least one embodiment of the present invention, a valve guide is also included; the valve guide is arranged on the cylinder block of the engine, and the valve rod passes through the valve guide.

Description of drawings

The accompanying drawings illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, are included to provide a further understanding of the invention, and are included in the specification and form part of this manual.

FIG. 1 is a schematic diagram of an open state of a valve device according to an embodiment of the present invention.

2 is a schematic diagram of a closed state of a valve device according to an embodiment of the present invention.

Detailed ways

The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the related content, rather than limit the present invention. In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings.

It should be noted that the embodiments of the present invention and the features of the embodiments can be combined with each other unless there is conflict. The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in Figures 1 and 2, an engine valve device according to an embodiment of the present invention includes a valve stem 2, elastic components 1, 7 and a permanent magnet 8; the valve stem 2 has a first end 10 and a second end 4; The elastic components 1, 7 are arranged on the valve stem 2 and are located between the first end 10 and the second end 4; the permanent magnet 8 is arranged between the elastic components 1, 7 and the first end 10; the permanent magnet 8 can An attractive force is applied to the first end 10 ; the permanent magnet 8 is capable of applying an attractive force to the elastic components 1 , 7 .

The engine valve device of this embodiment uses a combination of a permanent magnet and an elastic component to control the opening and closing of the valve, and the nonlinear force formed by the coupling action of the elastic component and the permanent magnet can ensure the opening and closing of the valve, making the valve device respond more quickly. The elastic stiffness of the elastic component in this embodiment can be much smaller than the valve spring formed by the conventional spring, which can effectively reduce the power consumption of the valve cam (ie the valve cam) to open the valve, reduce the internal load of the engine, and improve the efficiency of the piston engine. The engine valve apparatus of the embodiment has low power consumption and quick response performance.

In one embodiment of the present invention, the elastic assembly includes an elastic part 1 and an elastic part base 7; the elastic part 1 and the elastic part base 7 are located inside the cylinder block 6 of the engine; the elastic part base 7 is fixed on the valve stem 2; one end of the elastic member 1 is fixedly connected to the elastic member base 7, and the other end is pressed against the cylinder block 6 of the engine.

Among them, the elastic member 1 is preferably a spring, and the elastic member base 7 is preferably a spring base.

In one embodiment of the present invention, both the first end 10 and the second end 4 of the valve stem 2 are made of ferromagnetic material.

In one embodiment of the present invention, the valve device further includes a valve cam 9; the first end of the valve rod 2 is a valve tappet 10, and the second end is a valve head 4; Apply push.

Wherein, preferably, the valve tappet 10 , the stem portion of the valve stem 2 and the valve head 4 are integrally formed. Both the valve tappet 10 and the valve head 4 are made of ferromagnetic material.

In one embodiment of the present invention, the valve device further includes a valve seat 5, which is arranged on the cylinder block 6 of the engine; with the reciprocating motion of the valve stem 2, the valve head 4 can be closed with the valve seat 5 (ie, sealed closed) or open. The valve seat 5 is embedded in the cylinder block.

In one embodiment of the present invention, when the valve cam 9 exerts a pushing force on the valve lifter 10, the valve rod 2 moves in the first direction (in FIG. 1 and FIG. 2, that is, the valve rod 2 moves downward), and the The distance between the magnet 8 and the valve tappet 10 gradually decreases, and the attractive force increases rapidly. The distance between the permanent magnet 8 and the spring base 7 gradually increases, and the attractive force decreases rapidly. The distance between the permanent magnet 8 and the valve tappet 10 has a nonlinear relationship with the magnitude of the attraction force between the two. The distance between the permanent magnet 8 and the spring base 7 has a nonlinear relationship with the magnitude of the attractive force between the two.

By configuring the permanent magnet 8, the stiffness or preload force of the spring 1 of the valve device of the present invention can be smaller than the stiffness or preload force of the conventional valve spring, then in the process of the valve cam 9 pushing the valve, the power consumption is reduced. Significantly lower, the valve opens more quickly, reducing the valve opening time.

In one embodiment of the present invention, when the valve cam 9 does not exert a pushing force on the valve lifter 10, the valve rod 2 moves in the second direction under the action of the elastic force (ie the pushing force) of the valve spring 1 (Fig. 1 and Fig. 1). 2, that is, the valve stem 2 moves upward), the distance between the permanent magnet 8 and the valve tappet 10 gradually increases, the attractive force decreases rapidly, the distance between the permanent magnet 8 and the spring base 7 gradually decreases, and the attractive force decreases gradually. The force increases rapidly. The distance between the permanent magnet 8 and the valve tappet 10 has a nonlinear relationship with the magnitude of the attraction force between the two. The distance between the permanent magnet 8 and the spring base 7 has a nonlinear relationship with the magnitude of the attractive force between the two. The closing force when the valve seat 5 and the valve head 4 are sealed is mainly provided by the attraction force of the permanent magnet 8 to the spring base 7 .

By configuring the permanent magnet 8, in the process that the valve spring 1 pushes the spring base 7 to move upward and drives the valve stem 2 to move upward, the moving speed of the valve stem 2 is faster than the moving speed of the valve stem of the valve device in the prior art. Faster, reducing valve closing time. Especially in the closing process of the valve head 4 and the valve seat 5, because the gap between the permanent magnet 8 and the spring base 7 is very small (the gap between the permanent magnet 8 and the spring base 7 after the valve head 4 and the valve seat 5 are closed) The size of the valve can be reasonably preset by those skilled in the art), the attractive force between the two is very large, so that the valve head 4 and the valve seat 5 are well sealed, avoiding the problem of loose valve closing due to insufficient stiffness of the spring 1. By arranging the permanent magnet 8, the spring base 7 is always attracted by the permanent magnet 8, which prevents the valve device from falling into the cylinder when the spring 1 is broken.

In one embodiment of the present invention, the valve device further includes a magnet base 11 ; the magnet base 11 is fixedly connected with the cylinder block 6 of the engine, and is used for fixing the permanent magnet 8 .

In an embodiment of the present invention, the magnet base 11 has a fracture, and the permanent magnet 8 is clamped on the magnet holder 11 through the fracture. The fracture allows the permanent magnet 8 to be fixed on the magnet base 11 .

In one embodiment of the present invention, the fracture is a trapezoidal fracture or a stepped fracture. The fracture in FIG. 1 and FIG. 2 is a stepped fracture, and the size of the upper part of the stepped fracture is larger than that of the lower part, so that the permanent magnet 8 can be fixed on the magnet base 11 .

In one embodiment of the present invention, the valve device further includes a valve guide 3; the valve guide 3 is arranged on the cylinder block 6 of the engine, the valve rod 2 passes through the valve guide 3, and the valve guide 3 ensures the vertical direction of the valve rod 2 sports. The valve stem 2 can slide up and down through the valve guide 3 .

In an embodiment of the present invention, the permanent magnet 8 is a high-temperature permanent magnet, and the spring 1 is an alloy spring, such as various high-quality alloy springs in the prior art.

In one embodiment of the present invention, the magnet base 11 is connected to the cylinder block 6 of the engine through bolts.

In one embodiment of the present invention, the valve stem 2 passes through the permanent magnet 8 , for example, through the center of the permanent magnet 8 . The stem portion of the valve stem 2 is made of a non-ferromagnetic material.

In one embodiment of the present invention, when the valve gear works, the valve cam 9 rotates and pushes the valve tappet 10, and the valve tappet 10 pushes the spring base 7 downward. At this time, the distance between the spring base 7 and the permanent magnet 8 gradually increases. becomes larger, as the distance becomes larger, the attractive force of the permanent magnet 8 to the spring base 7 decreases rapidly, and at the same time, as the distance between the valve tappet 10 and the permanent magnet 8 decreases, the permanent magnet 8 attracts the valve tappet 10 The force gradually increases, and because the stiffness of the valve spring 1 is very small, the resistance of the valve rod 2 to move downward rapidly decreases, so that the resistance to the valve cam 9 is small, which ensures that the power consumption of the valve mechanism (valve cam) is significantly reduced. . The distance between the valve head 4 and the valve seat 5 increases, and the intake valve or the exhaust valve of the engine is opened. As the valve cam 9 continues to rotate, during the valve closing process, as the valve stem 2 rises, the distance between the spring base 7 and the permanent magnet 8 gradually decreases, and the attractive force of the spring base 7 by the permanent magnet 8 increases rapidly. is large, the force (i.e., the attractive force) is a distance-sensitive nonlinear force. The valve head 4 can be pressed on the valve seat 5 more quickly to ensure better airtightness.

The above-mentioned structure of the valve device of the present invention can use a smaller valve spring stiffness and a smaller valve spring preload, for example, the stiffness and/or preload force of the adopted spring 1 are those of a conventional valve spring and/or 60%, 50% of the preload force or other suitable values, reduce the power consumption of the valve train, avoid the valve cam being difficult to open the valve, the force between the valve head and the valve seat is small, the valve rebounds, and the valve is not tightly closed. A series of problems such as valve closing time is too long. Since the permanent magnet always attracts the spring base, it can be ensured that even if the valve spring is broken, it can be guaranteed that the valve will not fall into the cylinder.

In summary, the low-power consumption and quick-response piston engine valve device of the present invention uses permanent magnets to cooperate with elastic components to control the opening and closing of the valves, and the nonlinear force formed by the coupling action of the elastic components and the permanent magnets can ensure the valve The opening and closing response is faster. The use of smaller spring (or other elastic components) stiffness and smaller spring (or other elastic components) preload, in coordination with various structures of the valve device, can reduce the power consumption of the valve device.

In the description of this specification, reference to the description of the terms "one embodiment/mode", "some embodiments/modes", "example", "specific example", or "some examples" etc. is intended to be combined with the embodiment/modern A particular feature, structure, material, or characteristic described or exemplified is included in at least one embodiment/mode or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment/mode or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more implementations/modes or examples. Furthermore, those skilled in the art may combine and combine the different embodiments/modes or examples described in this specification and the features of the different embodiments/modes or examples without conflicting each other.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

Those skilled in the art should understand that the above embodiments are only for clearly illustrating the present invention, rather than limiting the scope of the present invention. For those skilled in the art, other changes or modifications can also be made on the basis of the above disclosure, and these changes or modifications are still within the scope of the present invention.

Claims (8)

1. An engine valve device is characterized by comprising a valve rod, an elastic component and a permanent magnet;

the valve stem having a first end and a second end;

the resilient assembly is disposed on the valve stem between the first and second ends;

the permanent magnet is disposed between the elastic assembly and the first end portion;

the permanent magnet is capable of exerting an attractive force on the first end;

the permanent magnet is capable of exerting an attractive force on the resilient assembly.

2. The engine valve arrangement according to claim 1, wherein the elastomeric assembly includes an elastomeric member and an elastomeric member base; the elastic component and the elastic component base are positioned inside a cylinder body of the engine;

the elastic part base is fixed on the valve rod; one end of the elastic component is fixedly connected with the elastic component base, and the other end of the elastic component is tightly pressed on a cylinder body of the engine.

3. The engine valve train apparatus of claim 2, further comprising a valve cam; the first end part of the valve rod is a valve tappet, and the second end part of the valve rod is a valve head; the valve cam can apply an urging force to the valve lifter.

4. The engine valve arrangement according to claim 3, further comprising a valve seat disposed on a block of the engine; the valve head can be closed or opened with the valve seat with the reciprocating motion of the valve stem.

5. The engine valve arrangement according to claim 1, further comprising a magnet seat; the magnet base is fixedly connected with a cylinder body of the engine and used for fixing the permanent magnet.

6. The engine valve arrangement according to claim 1 or 4, characterized in that the first and second ends of the valve stem are made of ferromagnetic material.

7. The engine valve arrangement of claim 2, wherein the resilient member is a spring and the resilient member base is a spring base.

8. The engine valve device according to claim 5, characterized in that the magnet holder has a break, and the permanent magnet is clamped to the magnet holder through the break.

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