CN2583363Y - Piston compensation rotary valve air inlet and exhaust engine - Google Patents
Piston compensation rotary valve air inlet and exhaust engine Download PDFInfo
- Publication number
- CN2583363Y CN2583363Y CN 02245031 CN02245031U CN2583363Y CN 2583363 Y CN2583363 Y CN 2583363Y CN 02245031 CN02245031 CN 02245031 CN 02245031 U CN02245031 U CN 02245031U CN 2583363 Y CN2583363 Y CN 2583363Y
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- China
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- piston
- compensating piston
- rotary valve
- valve shaft
- compensating
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- Expired - Fee Related
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Abstract
The utility model relates to a piston compensation rotary valve air inlet and exhaust engine. An original air valve elevation type valve mechanism is omitted for an engine. A compensating piston is installed in a cylinder end body which is originally provided with a valve mechanism, wherein, an elastic lifting mechanism is arranged on the compensating piston. The compensating piston is provided with three through holes from a shaft inside towards both sides and a lower part, and the three through holes are respectively communicated with an air inlet, an air exhaust and an engine combustion chamber. A rotary valve shaft transversally passes through the crossed space formed by the cylinder end body and the three holes of the compensating piston, wherein, a chain wheel is fixed at the end part of the rotary valve shaft, and the chain wheel is connected with a driving mechanism through a small chain. An air vent is dug on the circumference of the rotary valve shaft, and the air vent can be respectively conducted with the combustion chamber, the air inlet and an air exhaust in the rotary process of the valve shaft. The center of the compensating piston at the upper part is sheathed with a small compensating piston, the lower end face of the compensating piston is in an arc shape and is tightly combined with the circumferential face of the rotary valve shaft, and a hold-down mechanism is arranged at the upper part. The utility model has the advantages that the engine power can be improved, the air tightness of engines can be increased, the structure can be simplified, the volume can be reduced, the abrasion can be decreased, and the noise can be lowered.
Description
Technical field
The utility model belongs to technical field of engines, is specifically related to a kind of piston compensated rotating valve intake and exhaust engine that is used on the motorcycle.
Technical background
Traditional motor all by the distribution device of being made up of parts such as rocking arm, pitman arm shaft, valve spring and valves, has the following disadvantages:
1, the working engine elastic force that need utilize a part of power to overcome valve spring is finished the lifting of valve, realizes distribution, makes motor wasted power about 15%.
2, the reciprocal inertia force of Chan Shenging is big, occurs cam type surface easily and breaks away from rebound phenomenon.
3, the gas pressure of motor and heat load can cause that instantaneous torsional deformation of valve seat and air valve cervix and bar portion produce crooked pressure, descend valve sealing and thermal conductivity.
4, because the valve spring reciprocal inertia force can cause the wearing and tearing of parts such as rocking arm, cam type surface, gimmal.
5, the movable part of distribution device is more, and engine noise is big, as the noise that the valve clearance produces, and the noise that each parts matching gap produces etc.
6, complex structure, workpiece is many, the assembling up than higher of complete machine.
Summary of the invention
The purpose of this utility model just is at the available engine above shortcomings, a kind of piston compensated rotating valve intake and exhaust engine is provided, replace former engine valve rise-fall type distribution device with piston compensated rotating valve, improve the power of motor, increase the airtight property of motor, simplified structure, reduced volume, reduce wear, reduce noise.
The technical solution of the utility model is as follows:
A kind of piston compensated rotating valve intake and exhaust engine comprises cylinder block, connecting rod, piston assembly and the driving mechanism of conventional engines.Improvement of the present utility model is: removed the original valve rise-fall type distribution device of motor, a compensating piston is installed in the cylinder head body of former arrangement distribution device, compensating piston is provided with the elasticity lifting gear, compensating piston has three through holes to both sides and bottom in axle, communicate with the firing chamber of suction port, relief opening and the motor of cylinder head body both sides respectively; Rotary valve shaft passes across the crossing space of cylinder head body and aforementioned three holes of compensating piston, the end fixed chain wheels, sprocket wheel links to each other with the driving mechanism of motor by gimmal, rotary valve shaft has dug a ventilating hole on the circumference corresponding with aforementioned three hole intersection location, this ventilating hole is difference conducting firing chamber and suction port and relief opening in the rotary valve shaft rotary course.
For preventing collaborating of suction port and relief opening, also be with a little compensating piston in the compensating piston central upper portion, the lower end surface of little compensating piston is curved, combine closely with the circumferential surface of rotary valve shaft, the diameter of little compensating piston should be greater than the axial length of the ventilating hole on the rotary valve shaft, flexible hold-down mechanism on the little compensating piston.
Key of the present utility model is to utilize the rotation of rotary valve shaft to realize the switching in engine breathing road, has replaced original rise-fall type distribution device.The speed ratio of engine crankshaft and rotary valve shaft is 2:1.The utility model has the advantages that:
1, overcome valve rise-fall type valve actuating mechanism engine complex structure commonly used, inertial force is big, complete machine is too high, workpiece is many, the shortcoming that requirement on machining accuracy is high.Designs simplification, volume-diminished, it is short that complete machine becomes, and is convenient to improve machining accuracy and installation.
2, increased the useful horsepower of motor: the power of original motor will be consumed about 15% on the distribution device, motor of the present utility model is owing to adopted the gas distribution structure of rotary valve shaft type, consumption of engine power not, so effective use power of motor can corresponding increase by 15%.
3, sealing, thermal conductivity are good: overcome original motor because gas pressure causes valve seat, air valve cervix, the bending deflection of bar portion with heat load, make the sealing and the thermal conductivity decline of valve.
4, noise reduces: because of the distribution of this motor is to finish by a rotary valve shaft, large and small compensating piston all is to do small action around rotary valve shaft in component worker difference scope under the lifting of spring and the pressuring action, be the pulsation part, so mechanicalness noise is much smaller comparatively speaking.
Below be the technical parameter contrast of original rise-fall type valve of motor and rotary valve shaft type changeable air valve of the present utility model:
| Open the sending down abnormally ascending door | Changeable air valve | |
| The IVO Inlet Valve Open budc (°) exhaust valve close after bottom dead center (°) | ?10 ?40 | ?6 ?44 |
| Maximum open area *10 2(mm 2) | ?0.89 | ?0.99 |
| Open cumulative time (°) | ?230 | ?230 |
| The time face amount *10 3(mm 2°) face amount (mm effectively the time 2°) | ?120 ?102 | ?133 ?99 |
| Real early equal quiescent flow coefficient is tested volumetric efficiency item gas loss % order | ?0.85 ?0.8 ?0 | ?0.74 ?0.9 ?0 |
| Mechanical loss % | ?100 | ?40 |
Description of drawings
Fig. 1 is overall setup figure of the present utility model;
Fig. 2 is the structural drawing of the utility model rotary valve shaft distribution part;
Fig. 3 is the structural drawing of the utility model rotary valve shaft;
Fig. 4 is the A-A sectional drawing of Fig. 3;
Fig. 5 is the structural drawing of the utility model compensating piston;
Fig. 6 is a fundamental diagram of the present utility model;
Fig. 7 is a valve timing diagram of the present utility model.
Embodiment
Referring to Fig. 1, the structure of this motor comprises the cylinder block of conventional engines, connecting rod, piston assembly and driving mechanism.This motor has removed original valve rise-fall type distribution device, replaces rotary valve shaft type gas distribution structure.
The concrete structure of rotary valve shaft type gas distribution structure is installed a compensating piston 10 referring to Fig. 2, Fig. 3, Fig. 4 and Fig. 5 in the cylinder head body 14 of former arrangement distribution device, also be with a little compensating piston 9 in compensating piston 10 central upper portion, forms double-piston.Compensating piston 10 has three through hole A, B, C to both sides and bottom in axle, communicate with the firing chamber 3 of suction port 2, relief opening 13 and the motor of cylinder head body 14 both sides respectively.Rotary valve shaft 1 passes across the crossing space of cylinder head body 14 and compensating piston 10 aforementioned three holes, and combine closely in the circumferential surface of rotary valve shaft 1 and the arc lower end surface of little compensating piston 9 simultaneously.Rotary valve shaft 1 stretches out in cylinder head body 14 outer ends and is fixed with sprocket wheel 17, and sprocket wheel 19 links to each other with the driving mechanism of motor by gimmal 20.Rotary valve shaft 1 has dug a fan-shaped ventilating hole 16 on the circumference corresponding with aforementioned three hole intersection location, this ventilating hole 16 is difference conducting firing chamber 3 and suction port 2 and relief opening 13 in rotary valve shaft 1 rotary course.It is 130 ° that the circumference of ventilating hole 16 occupies amplitude.The diameter of in addition little compensating piston 9 is greater than the axial length L of the ventilating hole on the rotary valve shaft 1.The sealing of firing chamber and prevent suction port and the gas phase of relief opening is scurried logically when guaranteeing engine operation, compensating piston 10 is provided with the elasticity lifting gear, flexible hold-down mechanism on the little compensating piston 9.Elasticity lifting gear on the compensating piston 10 is made up of a lever 15, two groups of screws and tension spring 11, lever 15 two ends are fixing by one group of screw 17A and cylinder head body 14, another group screw 17B passes lever 15 and is connected with compensating piston 10, and between lever 15 and nut overcoat tension spring 11.The elastic compression mechanism of little compensating piston 9 is made of tension spring 12 and screw 18, and screw 18 is fixed on the lever 15, and tension spring 12 is loaded between the groove that screw 18 leaves in little compensating piston 9 tops.Like this, the support of the tension spring 11 of compensating piston 10 upper ends by lever 15 makes to move on the compensating piston 10 and reaches the compensating piston lower edge and cooperate with rotary valve shaft 1 zero clearance, produces soft friction, combustion chamber sealing when guaranteeing engine operation.Simultaneously, little compensating piston 9 presses down by the support of tension spring 12 and lever 15, cuts off suction port 2 and relief opening 13.In addition, leak gas between the cylindrical for the inwall that prevents compensating piston 10 and little compensating piston 9, be provided with piston ring 8, be provided with piston ring 5 and 6, enter suction port and relief opening, be provided with piston ring 7 in order to prevent machine oil in order to prevent firing chamber gas leakage.In addition, spark plug 4 also is equipped with on 3 tops, firing chamber.
The working principle of above-mentioned gas distribution structure and port timing are gone into Fig. 6 and shown in Figure 7, compression stroke is that a, power stroke are that b, exhaust stroke are that c, aspirating stroke are d, we are decided to be 0 ° to the position of compression stroke piston top dead center, because the rotating ratio of bent axle and rotary valve shaft is 2:1, bent axle runs to 180 ° of pistons to lower dead center, rotary valve shaft half-twist aligning relief opening from 0 °.Bent axle runs to 360 ° of pistons to top dead center from 180 °, and rotary valve shaft runs to 180 ° of positions from 90 ° of positions, and the relief opening back that communicates with the top of combustion chamber mouth is cut off.Bent axle runs to 540 ° position from 360 ° position.Rotary valve shaft runs to 270 ° from 180 ° and finishes the top of combustion chamber mouth back that communicates with suction port and cut off.Bent axle runs to 720 ° of (promptly 0 °) piston arrives top dead centers from 540 ° position and finishes compression, and rotary valve shaft is then from 270 ° of positions that run to 360 °.
Claims (8)
1, a kind of piston compensated rotating valve intake and exhaust engine, comprise cylinder block, connecting rod, piston assembly and driving mechanism, it is characterized in that removing the original distribution device of motor, a compensating piston (10) is installed in the cylinder head body (14) of former arrangement distribution device, compensating piston (10) is provided with the elasticity lifting gear, compensating piston (10) has three through holes (A, B, C) to both sides and bottom in axle, communicate with the firing chamber (3) of suction port (2), relief opening (13) and the motor of cylinder head body (14) both sides respectively; Rotary valve shaft (1) passes across the crossing space of cylinder head body (14) and aforementioned three holes of compensating piston (10), end fixed chain wheels (19), sprocket wheel links to each other with the driving mechanism of motor by gimmal (20), rotary valve shaft (1) has dug a ventilating hole (16) on the circumference corresponding with aforementioned three hole intersection location, this ventilating hole is difference conducting firing chamber and suction port and relief opening in the rotary valve shaft rotary course.
2, piston compensated rotating valve intake and exhaust engine according to claim 1, it is characterized in that in compensating piston (10), also being with a little compensating piston (9), the lower end surface of little compensating piston (9) is curved, combine closely with the circumferential surface of rotary valve shaft (1), the diameter of little compensating piston (9) should be greater than the axial length L of the ventilating hole (16) on the rotary valve shaft (1), and little compensating piston (9) is gone up flexible hold-down mechanism.
3 piston compensated rotating valve intake and exhaust engines according to claim 1 and 2, it is 130 ° that the circumference that it is characterized in that the ventilating hole (16) on the rotary valve shaft (1) occupies amplitude.
4, piston compensated rotating valve intake and exhaust engine according to claim 1 and 2 is characterized in that three holes (A, B, C) should equate with the width K of ventilating hole (16) with the diameter of rotary valve shaft (1) contacting point.
5, piston compensated rotating valve intake and exhaust engine according to claim 1 and 2 is characterized in that all being equipped with piston ring on compensating piston (10) and the little compensating piston (9).
6, piston compensated rotating valve intake and exhaust engine according to claim 1 and 2, it is characterized in that the elasticity lifting gear on the compensating piston (10) is made up of a lever (15), two groups of screws (17A, 17B) and tension spring (11), lever (15) two ends are fixing by one group of screw (17A) and cylinder head body (14), another group screw (17B) passes lever (15) and is connected with compensating piston (10), and between lever (15) and nut overcoat tension spring (11).
7, piston compensated rotating valve intake and exhaust engine according to claim 6, the elastic compression mechanism that it is characterized in that little compensating piston (9) is made of tension spring (12) and screw (18), screw (18) is fixed on the lever (15), and tension spring (12) is loaded between the groove that screw leaves in little compensating piston top.
8,, it is characterized in that the ventilating hole (16) on the rotary valve shaft (1) is fan-shaped according to claim 1,2 or 7 described piston compensated rotating valve intake and exhaust engines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02245031 CN2583363Y (en) | 2002-12-03 | 2002-12-03 | Piston compensation rotary valve air inlet and exhaust engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02245031 CN2583363Y (en) | 2002-12-03 | 2002-12-03 | Piston compensation rotary valve air inlet and exhaust engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2583363Y true CN2583363Y (en) | 2003-10-29 |
Family
ID=33716766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02245031 Expired - Fee Related CN2583363Y (en) | 2002-12-03 | 2002-12-03 | Piston compensation rotary valve air inlet and exhaust engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2583363Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314883C (en) * | 2002-12-03 | 2007-05-09 | 伍本银 | Piston compensated rotating valve intake and exhaust engine |
| CN100406696C (en) * | 2004-05-09 | 2008-07-30 | 刘亚民 | Two-stroke engine with rotor combustion chamber |
| CN101865055A (en) * | 2009-04-06 | 2010-10-20 | 株式会社电装 | The air inlet system that is used for internal-combustion engine |
-
2002
- 2002-12-03 CN CN 02245031 patent/CN2583363Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314883C (en) * | 2002-12-03 | 2007-05-09 | 伍本银 | Piston compensated rotating valve intake and exhaust engine |
| CN100406696C (en) * | 2004-05-09 | 2008-07-30 | 刘亚民 | Two-stroke engine with rotor combustion chamber |
| CN101865055A (en) * | 2009-04-06 | 2010-10-20 | 株式会社电装 | The air inlet system that is used for internal-combustion engine |
| CN101865055B (en) * | 2009-04-06 | 2012-07-25 | 株式会社电装 | Air intake device for internal combustion engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |