CN110173319B - Centrifugal automatic control variable exhaust valve structure - Google Patents
Centrifugal automatic control variable exhaust valve structure Download PDFInfo
- Publication number
- CN110173319B CN110173319B CN201910426809.3A CN201910426809A CN110173319B CN 110173319 B CN110173319 B CN 110173319B CN 201910426809 A CN201910426809 A CN 201910426809A CN 110173319 B CN110173319 B CN 110173319B
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- Prior art keywords
- centrifugal
- exhaust valve
- driving sleeve
- shaft
- sleeve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transmission Devices (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention provides a centrifugal automatic control variable exhaust valve structure, which comprises: the exhaust port of the cylinder is blocked and can be opened by the exhaust valve, the exhaust valve is connected with the control rod, and the caliber of the exhaust valve blocked by the exhaust valve can be changed by rotating the control rod; the centrifugal regulator is arranged outside the cylinder and comprises a centrifugal deducing part and a combined pushing part, the centrifugal deducing part can change the transmission direction of the combined pushing part, the centrifugal deducing part is linked with the engine, the combined pushing part is connected with the control rod, and the combined pushing part controls the positive and negative rotation of the control rod according to the position of the centrifugal deducing part. The invention can adopt a mechanical structure with smaller volume to automatically control the position of the corresponding exhaust valve, in particular to a linear control pull rod to rotate the angle of the exhaust valve by changing the moving distance of a driving sleeve through different rotating speeds and different centrifugal throwing forces as a control method so as to close or open the exhaust port and improve the compression ratio and the engine performance.
Description
Technical Field
The invention relates to the field of engines, in particular to a centrifugal automatic control variable exhaust valve structure.
Background
The whole process of exhausting exhaust gas from the engine and charging fresh air or combustible mixture is called ventilation process. The amount of air or air mixture charged into the cylinder per unit time is a factor that determines the power output of the engine. But also is an extremely important link for determining the power and economy of the engine.
In CN201810267355.5, a two-stroke variable exhaust phase device is disclosed, which is based on the principle that the rotation speed is identified by a sensor, the diameter of an exhaust valve is controlled to be reduced when the rotation speed is low, and the diameter of the exhaust valve is increased when the rotation speed is high. When the engine is in a low-speed and high-speed working condition, the engine can work in an optimal exhaust phase matched with the working condition, so that the engine performance is in an optimal state, scavenging loss can be reduced, and the effective compression ratio is improved.
However, in the prior art, the exhaust valve is controlled by a sensor, and the electronic controller has instability problem in about three years, so that a structure for purely mechanically identifying and controlling the exhaust valve needs to be designed, and the structure cannot greatly change the volume of the engine, so that the electronic controller needs to be stable and replaced.
Disclosure of Invention
The invention aims to solve the problems and provide a centrifugal automatic control variable exhaust valve structure.
The aim of the invention can be achieved by the following technical scheme: a centrifugal automatically controlled variable exhaust valve structure comprising:
the exhaust port of the cylinder is blocked and can be opened by the exhaust valve, the exhaust valve is connected with the control rod, and the caliber of the exhaust valve blocked by the exhaust valve can be changed by rotating the control rod;
the centrifugal compressor is characterized in that a chamber is arranged on the outer side of the cylinder to install a centrifugal adjuster, the centrifugal compressor comprises a centrifugal deducing part and a combined pushing part, the centrifugal deducing part can change the transmission direction of the combined pushing part, the centrifugal deducing part is linked with an engine, the combined pushing part is connected with a control rod, and the combined pushing part controls the control rod to rotate positively and negatively according to the position of the centrifugal deducing part.
The centrifugal deriving section includes:
the centrifugal disc is provided with a center shaft which penetrates through the centrifugal disc, the side edge of the inner cavity is provided with a swinging guide edge, the inner cavity is divided into a plurality of steel ball accommodating grooves, the centrifugal steel balls are divided into the steel ball accommodating grooves, and the bottom surface of the steel ball accommodating grooves and the guide edge form an obtuse angle;
the T-shaped shaft sleeve is sleeved on the middle shaft;
the driving sleeve is sleeved on the T-shaped shaft sleeve and can rotate relative to the T-shaped shaft sleeve, the driving sleeve is extruded by a spring, the disc edge of the T-shaped shaft sleeve is contacted with the centrifugal steel balls and the driving sleeve, and the driving sleeve is connected with the combined pushing part.
The gear ring is arranged on the outer side of the driving sleeve, and the gear ring of the driving sleeve is connected with the combined pushing part.
The centrifugal steel balls push the driving sleeve axially along the central shaft under the rotary centrifugal force, and the rotating speed of the centrifugal disc is in linear proportion to the moving distance of the driving sleeve.
The T-shaped shaft sleeve and the driving sleeve are provided with bearings serving as middle rotary connection;
the outer ring of the bearing is connected with the driving sleeve, and the inner ring is connected with the T-shaped shaft sleeve;
a C-shaped retaining ring is arranged to fix the outer ring of the bearing with the driving sleeve;
the bush is sleeved on the center shaft and is abutted against the inner ring of the bearing;
the front end of the spring is pressed on the bushing, the tail of the center shaft is provided with a limiting block, and the tail end of the spring is clamped on the limiting block.
An outer ring of the centrifugal disk is provided with an outer gear which is meshed with the linkage teeth of the engine.
The combined pushing part comprises a shaft gear and a plurality of hinged pull rods;
the outer end of the control rod is provided with a cam, and the control rod passes through the cam and is linked with the cam;
the starting ends of the pull rods are hinged with the shaft gears, the tail ends of the pull rods are hinged with the cams, and the shaft gears are meshed with the gear rings outside the driving sleeve.
And a reset structure is arranged between the cam and the cylinder and comprises a torsion spring.
The plurality of articulated pull rods comprise a first pull rod and a second pull rod, the first pull rod is movably connected with the second pull rod, the first pull rod is relatively fixed with a shaft gear, the shaft gear is limited in a cavity outside the cylinder, the upper part of the second pull rod is articulated with a cam, and the first pull rod drives the second pull rod to reciprocate through a rotating shaft gear.
Compared with the prior art, the invention can adopt a mechanical structure with smaller volume to automatically control the position of the corresponding exhaust valve, specifically, the invention changes the moving distance of the driving sleeve by taking different rotating speeds and different centrifugal throwing forces as control methods, and linearly controls the pull rod to rotate the angle of the exhaust valve, thereby closing or opening the exhaust port and improving the compression ratio and the engine performance.
Drawings
FIG. 1 is a schematic view of the overall installation of the present invention.
FIG. 2 is a partial cutaway view of the centrifugal deduction of the present invention.
Fig. 3 is an overall state diagram of the centrifugal deriving unit of the invention.
Fig. 4 is a diagram of the relationship between the control lever and the cam and lever.
Cylinder 1 in the figure; 2, a control rod; 3, a spring; 4, a center shaft; 5, driving the sleeve; 5-1 gear ring; 6, a first pull rod; 7-axis gears; 8, centrifuging the disc; 8-1 external gear; 9, a second pull rod; 10 cams; a 11C-shaped clasp ring; 12 bushings; 13 limiting blocks; 14 steel ball accommodating groove; 15 centrifuging the steel balls; 16, swinging the guide edge; 17 bearings; 18T-shaped shaft sleeve; 19 torsion springs.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1, a chamber is arranged on the side of an engine cylinder 1, and an engine crankshaft is connected with a plurality of linkage pieces. The exhaust port of the cylinder 1 is blocked by an exhaust valve, the exhaust valve is connected to the control rod 2, and the caliber of the exhaust port can be changed by rotating the control rod 2.
The invention comprises a centrifugal regulator arranged in a side cavity of the cylinder 1, wherein the centrifugal regulator comprises a centrifugal deducing part and a combined pushing part.
As shown in fig. 2 and 3, the centrifugal deriving unit includes:
the centrifugal shaft comprises a central shaft 4, a centrifugal disc 8, centrifugal steel balls 15, a T-shaped shaft sleeve 18, a driving sleeve 5 and a spring 3. The centrifugal disc 8 is sleeved on the center shaft 4, the centrifugal disc 8 and the center shaft 4 rotate simultaneously, and two designs are adopted, namely, as shown in fig. 2, an external gear 8-1 is arranged on the outer side of the centrifugal disc 8, and a linkage gear of the cylinder 1 is meshed with the external gear 8-1 to enable the centrifugal disc 8 to rotate; and the centrifugal disc 8 is not provided with an external gear 8-1, and the middle shaft 4 is inserted into a linkage gear to drive rotation. The final purpose of the rotation of the centrifugal disk 8 is to obtain centrifugal force.
The centrifugal disc 8 is provided with an inner cavity, the side edge of the inner cavity is provided with a swing guide edge 16, the inner cavity is divided into a plurality of steel ball accommodating grooves 14, centrifugal steel balls 15 are divided into the steel ball accommodating grooves 14, and the bottom surface of the steel ball accommodating grooves 14 and the guide edge form an obtuse angle a degrees. The T-shaped shaft sleeve 18 is sleeved on the middle shaft 4, the bearing 17 is sleeved on the T-shaped shaft sleeve 18, and the driving sleeve 5 is sleeved on the bearing 17. The C-shaped retaining ring 11 is arranged, the C-shaped retaining ring 11 is clamped in the driving sleeve 5 to fix the outer ring of the bearing 17 with the driving sleeve 5, the bushing 12 is sleeved on the center shaft 4, and the bushing 12 is abutted against the inner ring of the bearing 17. The tail part of the middle shaft 4 is provided with a limiting block 13, a spring 3 is sleeved on the middle shaft 4, the rear end of the spring 3 is clamped on the limiting block 13, and the front end of the spring 3 is abutted on a bushing 12.
The T-shaped shaft sleeve 18 and the driving sleeve 5 are pressed by the pressure of the spring 3, and the disc edge of the T-shaped shaft sleeve 18 is contacted with the centrifugal steel balls 15 and the driving sleeve 5. The T-shaped shaft sleeve 18 and the driving sleeve 5 can rotate relatively through the bearing 17. The outer side of the driving sleeve 5 is provided with a gear ring 5-1, and the gear ring 5-1 of the driving sleeve 5 is connected with the combined pushing part.
As shown in fig. 2, the centrifugal disc 8 throws the centrifugal steel balls 15, the centrifugal steel balls 15 move along the throwing guide edges 16 and generate axial decomposing force of the central shaft 4, the centrifugal steel balls 15 push the T-shaped shaft sleeve 18 and the driving sleeve 5 to move along the axial direction of the central shaft 4, and the rotating speed of the centrifugal disc 8 is in linear proportion to the moving distance of the driving sleeve 5. For example, the movement distance s=coefficient k×centrifugal rotation speed v.
The centrifugal deduction part can change the transmission direction of the combined pushing part, the combined pushing part is connected with the control rod 2, and the combined pushing part controls the control rod 2 to rotate positively and negatively according to the position of the centrifugal deduction part.
The joint pushing section includes:
the device comprises a shaft gear 7, a cam 10, a first pull rod 6 and a second pull rod 9, wherein the first pull rod 6 is movably connected with the second pull rod 9, the first pull rod 6 is fixed relative to the shaft gear 7, the shaft gear 7 is limited in a cavity at the outer side of the cylinder 1, and the upper part of the second pull rod 9 is hinged with the cam 10. The outer end of the control rod 2 is connected with a cam 10, the control rod 2 passes through the cam 10 and is in linkage with the cam 10, and the second pull rod 9 and the control rod 2 are arranged at two positions of the cam 10.
The shaft gear 7 is meshed with the gear ring 5-1 outside the driving sleeve 5, when the driving sleeve 5 moves outwards, the shaft gear 7 rotates and drives the first pull rod 6 to rotate downwards, the first pull rod 6 drives the second pull rod 9 to pull downwards, and therefore the second pull rod 9 rotates the cam 10 and the control rod 2, and the exhaust valve inside the control rod 2 rotates. The larger the rotation speed of the cylinder 1 is, the larger the caliber of the exhaust port is, and the caliber of the exhaust port is reduced at the low rotation speed, so that the compression ratio and the fuel economy are improved.
As shown in fig. 4, a reset structure is arranged between the cam 10 and the cylinder 1, the reset structure comprises a torsion spring 19, and the torsion spring 19 can further assist in determining the initial starting point of rotation of the control rod 2 and also can limit the maximum rotation angle.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. A centrifugal automatically controlled variable exhaust valve structure comprising:
the exhaust port of the cylinder is blocked and can be opened by the exhaust valve, the exhaust valve is connected with the control rod, and the caliber of the exhaust valve blocked by the exhaust valve can be changed by rotating the control rod;
the centrifugal compressor is characterized in that a centrifugal regulator is arranged outside a cylinder, the centrifugal regulator comprises a centrifugal deducing part and a combined pushing part, the centrifugal deducing part can change the transmission direction of the combined pushing part, the centrifugal deducing part is linked with an engine, the combined pushing part is connected with a control rod, and the combined pushing part controls the positive and negative rotation of the control rod according to the position of the centrifugal deducing part;
the centrifugal deriving unit includes:
the centrifugal disc is provided with a center shaft which penetrates through the centrifugal disc, the side edge of the inner cavity is provided with a swinging guide edge, the inner cavity is divided into a plurality of steel ball accommodating grooves, the centrifugal steel balls are divided into the steel ball accommodating grooves, and the bottom surface of the steel ball accommodating grooves and the guide edge form an obtuse angle;
the T-shaped shaft sleeve is sleeved on the middle shaft;
the driving sleeve is sleeved on the T-shaped shaft sleeve and can rotate relative to the T-shaped shaft sleeve, the driving sleeve is extruded by a spring, the disc edge of the T-shaped shaft sleeve is contacted with the centrifugal steel balls and the driving sleeve, and the driving sleeve is connected with the combined pushing part.
2. The centrifugal automatically-controlled variable exhaust valve structure according to claim 1, wherein a gear ring is provided outside the driving sleeve, and the gear ring of the driving sleeve is connected with the joint pushing part.
3. The centrifugal automatically controlled variable exhaust valve structure according to claim 1 or 2, wherein the centrifugal steel balls push the driving sleeve axially along the central shaft under the rotation centrifugal force, and the rotation speed of the centrifugal disc is linearly proportional to the moving distance of the driving sleeve.
4. The centrifugal automatic control variable exhaust valve structure according to claim 1 or 2, wherein the T-shaped shaft sleeve and the driving sleeve are provided with bearings as intermediate rotational connection;
the outer ring of the bearing is connected with the driving sleeve, and the inner ring is connected with the T-shaped shaft sleeve;
a C-shaped retaining ring is arranged to fix the outer ring of the bearing with the driving sleeve;
the bush is sleeved on the center shaft and is abutted against the inner ring of the bearing;
the front end of the spring is pressed on the bushing, the tail of the center shaft is provided with a limiting block, and the tail end of the spring is clamped on the limiting block.
5. The centrifugal automatic control variable exhaust valve structure according to claim 3, wherein the T-shaped shaft sleeve and the driving sleeve are provided with bearings as intermediate rotary connection;
the outer ring of the bearing is connected with the driving sleeve, and the inner ring is connected with the T-shaped shaft sleeve;
a C-shaped retaining ring is arranged to fix the outer ring of the bearing with the driving sleeve;
the bush is sleeved on the center shaft and is abutted against the inner ring of the bearing;
the front end of the spring is pressed on the bushing, the tail part of the center shaft is provided with a limiting block, and the tail end of the spring is clamped on the limiting block;
and an outer gear is arranged on the outer ring of the centrifugal disk, and the outer gear is meshed and connected with linkage teeth of the engine.
6. The centrifugal automatically controlled variable exhaust valve structure according to claim 4, wherein the centrifugal disk outer ring is provided with an external gear which is engaged with the interlocking teeth of the engine.
7. The centrifugal automatically controlled variable exhaust valve structure according to claim 6, wherein the combined pushing part comprises a shaft gear and a plurality of hinged pull rods;
the outer end of the control rod is provided with a cam, and the control rod passes through the cam and is linked with the cam;
the starting ends of the pull rods are hinged with the shaft gears, the tail ends of the pull rods are hinged with the cams, and the shaft gears are meshed with the gear rings outside the driving sleeve.
8. The centrifugal self-controlling variable exhaust valve structure according to claim 7, wherein a return structure is provided between the cam and the cylinder, the return structure including a torsion spring.
9. The centrifugal automatically controlled variable exhaust valve structure according to claim 7, wherein the plurality of hinged tie rods include a first tie rod and a second tie rod, the first tie rod is movably connected with the second tie rod, the first tie rod is fixed relative to the shaft gear, the shaft gear is limited in the cavity outside the cylinder, the second tie rod is hinged with the cam above the second tie rod, and the rotation shaft gear drives the second tie rod to reciprocate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910426809.3A CN110173319B (en) | 2019-05-21 | 2019-05-21 | Centrifugal automatic control variable exhaust valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910426809.3A CN110173319B (en) | 2019-05-21 | 2019-05-21 | Centrifugal automatic control variable exhaust valve structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110173319A CN110173319A (en) | 2019-08-27 |
| CN110173319B true CN110173319B (en) | 2024-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910426809.3A Active CN110173319B (en) | 2019-05-21 | 2019-05-21 | Centrifugal automatic control variable exhaust valve structure |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020047998A (en) * | 2000-12-15 | 2002-06-22 | 이계안 | Variable valve apparatus for engine |
| CN1834410A (en) * | 2006-04-14 | 2006-09-20 | 江门市硕普科技开发有限公司 | Self-adaptive air valve phaser of engine |
| TW201109518A (en) * | 2009-09-14 | 2011-03-16 | Honda Motor Co Ltd | Valve operating system for internal combustion engine |
| CN105422205A (en) * | 2014-09-17 | 2016-03-23 | 铃木株式会社 | Engine valve mechanism |
-
2019
- 2019-05-21 CN CN201910426809.3A patent/CN110173319B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020047998A (en) * | 2000-12-15 | 2002-06-22 | 이계안 | Variable valve apparatus for engine |
| CN1834410A (en) * | 2006-04-14 | 2006-09-20 | 江门市硕普科技开发有限公司 | Self-adaptive air valve phaser of engine |
| TW201109518A (en) * | 2009-09-14 | 2011-03-16 | Honda Motor Co Ltd | Valve operating system for internal combustion engine |
| CN105422205A (en) * | 2014-09-17 | 2016-03-23 | 铃木株式会社 | Engine valve mechanism |
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| Publication number | Publication date |
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| CN110173319A (en) | 2019-08-27 |
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