JP3067626U - Engine variable valve system equipment - Google Patents

Abstract

(57) Abstract: An engine variable valve system device that enables an engine to obtain good torque and horsepower over a wide speed range is provided. SOLUTION: A cam wheel 1, a rocker arm 2, a slide sleeve, an automatic hydraulic pressing device 4, and a valve 5 are provided. When the cam wheel 1 pushes the rocker arm 2 and the automatic hydraulic pressing device 4 pushes the slide sleeve provided in the rocker arm 2 right and left, the slide sleeve is fitted to the rocker arm 2 and the rocker arm 2 is moved. When the cam wheel 1 is pressed, the valve 5 opens and closes. The slide sleeves are the medium-speed rocker arm 21 and the low-speed rocker arm 2 of the rocker arm 2.
2. Since it is fitted corresponding to the medium-high speed rocker arm 24 or the high speed rocker arm 25, the valve is opened and closed within a wide speed range of the engine to obtain an optimum torque and horsepower according to the speed.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a variable valve system for an engine.

[0002]

[Prior art]

 When the engine is running at high or low speed, the intake and exhaust valves are controlled by the cam wheel and rocker arm, and the intake and exhaust of the cam wheel and the process of raising and lowering the exhaust valve take place after combustion. Power of the engine, thus affecting the efficiency of the engine. In engine design technology, the intake and exhaust of intake and exhaust valves are closely related to the power generated at high or low speed conditions. The time during which the intake and exhaust valves are open at the same time is called the overlap angle of the valves.Generally, high-speed engines place great importance on the overlap angle of valves, and such engines often employ a slightly larger overlap angle. doing. However, if the overlapping angle of the valves is too large, the low-speed performance of the engine deteriorates. In particular, in the idling operation, the excessive overlapping angle of the valves impairs the order of intake and exhaust, and the idling operation becomes unstable.

That is, if the rotation speed of the engine is different, the requirements for the supply and exhaust are different. Therefore, each automobile manufacturer invests enormous human resources in research and development to obtain the best supply and exhaust at high and low speeds of the engine. By adjusting the camshaft to its rotational speed, the engine can obtain the best operating efficiency.

Conventionally, each automobile manufacturer has developed a supply and exhaust control mechanism, most of which is a technology for controlling intake and exhaust valve overlap angles, ascending process, operating time, and the like. For example, Honda Motor Co., Ltd. mainly provides a high- and low-stage two-stage variable air supply and exhaust control mechanism. The control mechanism changes the air supply and exhaust by automatically switching the cam wheel according to the engine speed. At the same time, it changes the process of raising the valve. Mitsubishi's engine employs a two-displacement switching engine, which operates all four cylinders when large power is required, and automatically activates two cylinders when large power is not required. It will be discontinued and become a two-cylinder engine. In addition, the engine of Mitsubishi Motors has a variable capacity mode structure in which the first and fourth cylinders do not operate.

However, as the performance and speed of engines increase, the above-described two-stage variable supply / exhaust control mechanism cannot provide a better solution. Also, because the engine is required to be able to operate under load at a wide range of speeds, there is a contradiction in the design of the valve lift and cam wheel profile. Conventional valves provide a reliable way to operate intake and exhaust, the rise and contour of the valve are fixed with respect to crank angle, and typical engines vary the valve rise curve and operating time Alone cannot achieve the best efficiency at various rotational speeds. However, making the valve lift, timing and operating time variable can provide the best compromise between engine gasoline consumption, efficiency, exhaust gas quality, and idling stability.

[0006]

[Problems to be solved by the invention]

 SUMMARY OF THE INVENTION It is an object of the present invention to provide a variable valve system for an engine that allows the engine to obtain good torque and horsepower over a wide speed range, and that provides more than two stages of valve operating time and ascending changes. Another object of the present invention is that the valve lift, profile, timing, operating time and overlap angle are all independently and freely variable according to the requirements, so that the engine is capable of controlling the torque and horsepower at each rotational speed. An object of the present invention is to provide a variable valve system for an engine that can obtain an optimum compromise.

[0007]

[Means for Solving the Problems]

 A variable valve system device for an engine according to the present invention for solving the above-mentioned problems includes a cam wheel, a rocker arm, a slide sleeve, an automatic hydraulic pressing device, and a valve. The cam wheel pushes the rocker arm, the automatic hydraulic pressing device pushes the slide sleeve provided in the rocker arm to the left and right, and fits the slide sleeve corresponding to the rocker arm used for four different speeds. The valve opens and closes in response to the push of the cam wheel, and the engine can obtain optimal torque and horsepower over a wide speed range. The present invention can provide four stages of valve actuation time and rising change, four mated rocker arms correspond to cam wheel actuation, and each cam wheel is manufactured according to each manufacturer's wishes It can handle engines in various speed ranges.

[0008]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 9, the variable valve system for an engine according to one embodiment of the present invention has a plurality of rocker arms 2 and slide sleeves 3 provided in an engine body 6, and an external automatic hydraulic pressure lifting device. The slide sleeve 3 provided in the rocker arm 2 is pushed to the left and right by the device 4, and the slide sleeve 3 is fitted in correspondence with the rocker arm 2, and when the rocker arm 2 is pressed against the cam wheel 1, the engine is turned on. The valve 5 can be opened and closed. The cam wheel 1 is composed of a medium speed cam wheel 11, a low speed cam wheel 12, a medium high speed cam wheel 13 and a high speed cam wheel 14 mounted on the transmission shaft. The power corresponding to the pressing is provided, and the valve 5 can be opened and closed at an accurate timing. The features of the rocker arm are as follows.

The rocker arm 2 includes a medium-speed rocker arm 21, a low-speed rocker arm 22, a Y-shaped rocker arm 23, a medium- and high-speed rocker arm 24, and a high-speed rocker arm 25. A semicircular fixed seat 26 is provided outside each of the low-speed rocker arm 21 and the high-speed rocker arm 25, and the rocker arm 2 is fixed to an appropriate portion of the engine body 6 by the semicircular fixed seat 26.

The medium-speed rocker arm 21 is mounted on the outside of the low-speed rocker arm 22. An arm portion 211 corresponding to the medium-speed cam wheel 11 is provided at an upper portion of the main body, and a pressing protrusion 212 is provided at a bottom portion. A hole 2121 is provided in a pedestal portion of the pressing projection 212, and a pressing spring 2122 is provided. The pressing spring 2122 is pressed against an appropriate portion of the engine main body 6 so that the medium-speed rocker arm 21 is provided. Position. Further, a shaft column hole 213 is opened on one side of the main body, and concave and convex nail holes 214 are opened on the other side at equal intervals, and a protruding circular seat is formed on an edge of the concave and convex nail holes. The protruding circular seat is provided on a concave groove seat 224 provided on one side of the low-speed rocker arm 22. Since the end of the convex seat 2141 of the concave and convex claw hole 214 protrudes in an arc shape, the slide sleeve 3 moves and is easily fitted to the concave and convex claw hole 214.

The low-speed rocker arm 22 is assembled between the medium-speed rocker arm 21 and the Y-shaped rocker arm 23, and its main body is provided with an arm portion 221 corresponding to the low-speed cam wheel 12, and has a bottom portion. A pressing protrusion 222 is provided, and a hole 2221 is opened in a pedestal portion of the pressing protrusion 222 to provide a pressing spring 2222. The pressing spring 2222 is pressed against an appropriate portion of the engine body 6. Then, the low-speed rocker arm 22 is positioned. The rocker arm main body is provided with an uneven claw hole 223 penetrating therethrough. The uneven claw hole 223 is formed on both sides of the medium speed rocker arm 21 and the uneven claw hole 232 of the Y-type rocker arm 23. Further, concave groove seats 224 are provided at both ends of the concave and convex claw holes 223, and both sides of the low-speed rocker arm 22 are fitted and connected to the medium-speed rocker arm 21 and the Y-shaped rocker arm 23, respectively. The concave / convex claw hole 223 has a convex seat 2231 at an edge adjacent to the Y-shaped rocker arm 23, and the end of the convex seat 2231 protrudes in an arc, so that the slide sleeve 3 can be easily formed. Is moved to and fitted into the concave and convex claw holes 223.

The Y-shaped rocker arm 23 is assembled between the low-speed rocker arm 22 and the medium- and high-speed rocker arm 24, and a Y-shaped rod 231 is provided at the center of the main body, and the front end of the Y-shaped rod 231 is an engine. Connected to the intake and exhaust valves. In the center of the main body, an uneven claw hole 232 is formed so as to penetrate through the main body. Projecting seats 233 are provided at both ends of the concave and convex claw holes 232, and the projecting seats 233 are fitted and connected to the recessed groove seats 224 of the low-speed rocker arm 22 and the recessed groove seats 244 of the medium and high-speed rocker arm 24. Since the end of the convex seat 2321 of the concave and convex claw hole 232 protrudes in an arc, the slide sleeve 3 is easily moved and fitted into the concave and convex claw hole 232.

The middle and high speed rocker arm 24 is assembled between the Y-shaped rocker arm 23 and the high speed rocker arm 25. An arm portion 241 corresponding to the medium and high speed cam wheel 13 is provided at the upper part of the main body, and at the bottom portion. Is provided with a pressing protrusion 242, a hole is formed in a pedestal portion of the pressing protrusion 242, and a pressing spring 2422 is provided. The pressing spring 2422 corresponds to an appropriate portion of the engine body 6. The middle and high speed rocker arm 24 can be positioned by being pressed. An uneven claw hole 243 is opened in the main body, and both sides of the claw hole 243 communicate with the uneven claw hole 232 of the Y-shaped rocker arm 23 and the uneven claw hole seat 254 of the high-speed rocker arm 25. A concave groove seat 244 is provided on both end surfaces of the main body, and both sides of the main body can be fitted with the Y-shaped rocker arm 23 and the high-speed rocker arm 25, respectively. The end of the convex seat provided on the concave and convex claw hole 243 on the side adjacent to the Y-shaped rocker arm 23 protrudes in an arc, so that the slide sleeve 3 easily moves into the concave and convex claw hole 243. It is fitted.

The high-speed rocker arm 25 is mounted on the outside of the medium- and high-speed rocker arm 24, an arm 251 corresponding to the high-speed cam wheel 14 is provided on the upper part of the main body, and a pressing projection 252 is provided on the bottom. A hole is provided in a pedestal portion of the pressing projection 252 to allow a pressing spring 2522 to be installed. The pressing spring 2522 is pressed against an appropriate portion of the engine body 6 to position the high-speed rocker arm 25. can do. A shaft pillar hole 253 is opened on one side of the main body, and concave and convex claw holes 254 are provided at equal intervals on the other side, and a protruding circular seat is provided on an edge of the concave and convex claw hole. The rocker arm 24 is fitted in the groove seat 244 on one side of the middle and high speed rocker arm 24. Since the end of the convex seat 2541 of the concave / convex claw hole 254 projects so as to form an arc, the slide sleeve 3 is easily moved and fitted to the concave / convex claw hole seat 254.

The slide sleeve 3 is assembled to the hydraulic plunger 41 and moves to the rocker arm 2, and the concave and convex claw holes 213 of the medium-speed rocker arm 21, the concave and convex claw holes 223 of the low-speed rocker arm 22, and the Y-type rocker arm 23, the concave and convex claw holes 243 of the middle and high speed rocker arm 24, or the concave and convex claw hole seats 254 of the high speed rocker arm 25. Around the main body of the slide sleeve 3, convex protrusions 33 each having an arc-shaped end at both ends are provided at every 90 degrees. The slide sleeve 3 has a through hole 31 in the main body, a ring fitting seat 32 provided at each end, and both sides are positioned on the hydraulic plunger 41 by snap rings 42, and can be rotated together with the hydraulic plunger 41. it can.

When the rotation speed of the engine is increased from idling to low speed by the above-described members, the hydraulic plunger 41 moves the slide sleeve 3 to the concave and convex claw holes 223 of the low-speed rocker arm 22 and the concave and convex claw holes of the Y-type rocker arm 23. 232, and are integrally connected as shown in FIG. 10. Correspondingly, the low-speed cam wheel 12 operates the low-speed rocker arm 22, and the Y-type rocker arm 23 operates the valve 5 to open and close. Let When the rotation speed of the engine is increased to the medium speed, the effective range of the medium speed cam wheel 11 becomes larger because the cam wheel trajectory line is larger than that of the low speed cam wheel 12. The hydraulic plunger 41 moves the slide sleeve 3 into the concave and convex claw hole 214 of the medium speed rocker arm 21, the concave and convex claw hole 223 of the low speed rocker arm 22, and the concave and convex claw hole 232 of the Y-type rocker arm 23. 11, the medium speed cam wheel 11 moves the medium speed rocker arm 21 and the Y-shaped rocker arm 23 moves the valve 5 to open and close. When the engine speed is increased from the middle speed to the middle speed, the hydraulic plunger 41 moves the slide sleeve 3 into the uneven claw holes 232 of the Y-shaped rocker arm 23 and the uneven claw holes 243 of the medium-speed rocker arm 24. As shown in FIG. 12, the medium and high speed cam wheel 13 moves the medium and high speed rocker arm and the Y-type rocker arm 23 moves the valve 5 to open and close. When the engine speed is increased from middle to high speed, the hydraulic plunger 41 moves the slide sleeve 3 to the concave and convex claw holes 232 of the Y-shaped rocker arm 23, the concave and convex claw holes 243 of the medium and high speed rocker arm 24 and the high speed rocker arm 25. It is moved into the uneven claw hole seat 254 and connected integrally as shown in FIG. 13, the high-speed cam wheel 14 operates corresponding to the high-speed rocker arm 25, and the Y-type rocker arm 25 opens and closes by moving the valve 5. Is performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a variable valve system device for an engine according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a state in which the variable valve system device for the engine according to the embodiment of the present invention is mounted on the engine body.

FIG. 3 is a top view of the engine variable valve system according to the embodiment of the present invention;

FIG. 4 is a sectional view illustrating the rocker arm and the slide sleeve according to the embodiment of the present invention;

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a sectional view taken along line BB of FIG. 4;

FIG. 7 is a sectional view taken along line CC of FIG. 4;

FIG. 8 is a side view showing the slide sleeve according to the embodiment of the present invention;

FIG. 9 is an exploded perspective view showing the rocker arm and the slide sleeve according to the embodiment of the present invention.

FIG. 10 is a schematic view showing the operation of the variable valve system for the engine according to the embodiment of the present invention;

FIG. 11 is a schematic view illustrating the operation of the engine variable valve system according to the embodiment of the present invention.

FIG. 12 is a schematic view illustrating an operation of the engine variable valve system according to the embodiment of the present invention.

FIG. 13 is a schematic view illustrating an operation of the engine variable valve system according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cam wheel 2 Rocker arm 3 Slide sleeve 4 Automatic hydraulic pressing device 5 Valve 6 Engine main body 11 Medium speed cam wheel 12 Low speed cam wheel 13 Medium high speed cam wheel 14 High speed cam wheel 21 Medium speed rocker arm 22 Low speed rocker arm 23 Y type rocker Arm 24 Medium-high-speed rocker arm 25 High-speed rocker arm 26 Semicircular fixed seat 31 Through hole 32 Ring fitting seat 33 Convex projection 41 Hydraulic plunger 42 Snap ring 211, 221, 241, 251 Arm unit 212, 222, 242, 252 Pressing Protruding seats 213, 253 Shaft pillar holes 214, 254 Uneven claw hole seats 223, 232, 243 Uneven claw holes 224, 244 Depressed groove seat 231 Y-shaped rod 233 Projected circular seats 2321, 2231, 2541 522 pressing spring

Claims (1)

[Utility model registration claims] 1. A variable valve system device for an engine, comprising a cam wheel, a rocker arm, a slide sleeve, an automatic hydraulic pressing device, and a valve, the valve being mounted on an engine having an engine body, wherein the valve is opened and closed with good timing. Wherein the cam wheel is mounted inside the engine main body and has a transmission shaft, and a medium speed cam wheel, a low speed cam wheel, a medium high speed cam wheel, and a high speed cam wheel mounted on the transmission shaft. , The medium-speed cam wheel, the low-speed cam wheel according to the rotation speed of the engine,
The medium-high speed cam wheel or the high speed cam wheel presses the rocker arm, the rocker arm is a medium speed rocker arm, a low speed rocker arm, a Y-type rocker arm, a medium speed rocker arm, a high speed rocker arm, A semi-circular fixed seat provided outside each of the low-speed rocker arm and the high-speed rocker arm, the semi-circular fixed seat being fixed inside the engine body; An arm corresponding to the medium speed cam wheel, a pressing projection provided on the bottom and having a first hole seat, a shaft hole formed on one side, and an other on the other side. A first protruding claw hole provided at intervals and a first protruding circular seat provided on a side where the first concavity and convex claw hole is provided;
The hole seat is provided with a pressing spring that is pressed against the engine body to position the medium-speed rocker arm. The low-speed rocker arm is assembled between the medium-speed rocker arm and the Y-type rocker arm, An arm portion corresponding to the low-speed cam wheel, a pressing projection provided on the bottom and having a second hole seat, and formed so as to penetrate the low-speed rocker arm and communicate with the first uneven claw hole. A first concave and convex claw hole, and a first and second low speed rocker arm formed on both sides of the first concave and convex claw hole, the first and second low speed rocker arms being used to fit with the medium speed rocker arm and the Y-shaped rocker arm. The second hole seat is provided with a pressing spring which is pressed against the engine body to position the low-speed rocker arm, and the first concave / convex claw hole is provided in the Y-shaped hole. An end has an arc-shaped convex seat on one side adjacent to the rocker arm, and the first protruding circular seat is fitted to one of the first concave groove seats. A Y-shaped rod, which is mounted between the arm and the middle and high speed rocker arm, is provided at the center and has a front end connected to the valve, and communicates with the Y-shaped rod passing through the center and corresponding to the first concave and convex claw hole. And a second protruding circular seat provided on both sides of the second concave and convex claw hole and fitted with the first concave groove seat, respectively. The claw hole has an arc-shaped convex seat at an end, and the middle and high speed rocker arm is assembled between the Y-shaped rocker arm and the high speed rocker arm, and is provided at an upper portion and provided on the medium and high speed cam wheel. A corresponding arm portion, a pressing boss provided on a bottom portion and having a third hole seat. A third claw hole formed so as to penetrate the middle and high speed rocker arm and communicate with the second claw hole; and a Y-shaped rocker formed on both sides of the middle and high speed rocker arm. An arm and a second concave groove seat used to be fitted to each other relative to the high-speed rocker arm, wherein the third hole seat is pressed against the engine body to position the medium-high speed rocker arm. A pressing spring is provided, and the third concave and convex claw hole has an arc-shaped convex seat on an end adjacent to the Y-shaped rocker arm, and one of the second concave groove seats is the second protruding circular seat. The high-speed rocker arm is attached to the outside of the medium-speed rocker arm, and has an arm portion provided at an upper portion and corresponding to the high-speed cam wheel, and a fourth hole seat provided at a bottom portion. Pressing boss, A shaft post hole is open to the side, the third
A second uneven claw hole seat provided at equal intervals on the other side so as to communicate with one side of the uneven claw hole, and the second uneven claw hole seat provided on the side where the second uneven claw hole is established; A second protruding circular seat fitted to one of the two concave groove seats, and a pressing spring for pressing the high-speed rocker arm pressed against the engine body is provided in the fourth hole seat; The hole seat has a convex seat having an arcuate end, and the slide sleeve is provided inside the rocker arm, and the first uneven nail hole, the first uneven nail hole, and the second uneven nail hole are provided. The two concave and convex claw holes move in the second concave and convex claw holes, and are provided with arc-shaped protruding seats provided at 90 ° intervals around the circumference, through holes, and ring fittings provided at both ends. And the automatic hydraulic pressing device is mounted outside the engine body, and A hydraulic plunger connected to both sides of the leave and rotating with the slide sleeve,
A snap ring used to position the slide sleeve on the hydraulic plunger, and when the slide sleeve is pushed right and left, the slide sleeve is fitted to the rocker arm and the rocker arm is moved by the cam. The valve opens and closes by being pressed against a wheel, and when the rotation speed of the engine increases from idling to low speed, the slide plunger moves the slide sleeve to the first concave and convex claw holes and the second concave and convex claw holes. The valve is opened and closed by moving and being integrally connected with the low-speed rocker arm and the Y-type rocker arm, the low-speed cam wheel operates the low-speed rocker arm, and the Y-type rocker arm operates the valve. Perform the operation, and the rotation speed of the engine is medium speed In the case of an increase, the slide plunger moves the slide sleeve to the first concave / convex claw hole, the first concave / convex claw hole, and the second concave / convex claw hole to move the slide sleeve to the medium speed rocker arm, the low speed rocker arm and the Y. Integrally connected with the type rocker arm,
When the medium-speed cam wheel operates the medium-speed rocker arm and the Y-type rocker arm operates the valve, the valve performs an opening / closing operation. The slide sleeve moves to the second concave and convex claw holes and the third concave and convex claw holes by the hydraulic plunger, and is integrally connected to the Y-shaped rocker arm and the medium-speed rocker arm, and the Y-shaped rocker arm is connected to the valve. By actuating the valve, the valve performs an opening and closing operation. When the engine speed is increased from a medium to high speed, the slide plunger causes the slide sleeve to move the second uneven claw hole, the third uneven claw hole, and the Move to the second concave and convex claw hole, and move along with the Y-shaped rocker arm, the middle and high speed rocker arm and the high speed rocker arm; Manner by connecting to the Y-type rocker arm to actuate the valve, the variable valve system of an engine the valve, characterized in that for opening and closing operation.