CN1314883C - Piston compensated rotating valve intake and exhaust engine - Google Patents
Piston compensated rotating valve intake and exhaust engine Download PDFInfo
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- CN1314883C CN1314883C CNB021279578A CN02127957A CN1314883C CN 1314883 C CN1314883 C CN 1314883C CN B021279578 A CNB021279578 A CN B021279578A CN 02127957 A CN02127957 A CN 02127957A CN 1314883 C CN1314883 C CN 1314883C
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- piston
- rotary valve
- compensating piston
- valve shaft
- shaft
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Abstract
The present invention relates to a piston compensated rotating valve intake and exhaust engine. In the present invention, an original air valve lifting type air distribution mechanism of the engine is removed, and a compensation piston is arranged in a cylinder head body which is provided with the air distribution mechanism originally; an elastic lifting mechanism is arranged on the compensation piston; both sides and the lower part of the compensation piston are provided with three through holes from a shaft, and the three through holes are respectively communicated with an air inlet, an air outlet and a combustion chamber of the engine. A shaft of a rotary valve laterally passes through the cylinder head body and a space formed by the three through holes of the compensation piston; a chain wheel is fixed to the end part of the shaft and is connected with a drive mechanism through a small chain; the circumference of the shaft of a rotary valve is provided with a ventilation hole which respectively communicates the combustion chamber with the air inlet and the air outlet in the process of the rotation of the shaft of a rotary valve. A small compensation piston is also sheathed at the center of the top of the compensation piston; the bottom end face of the small compensation piston presents an arc shape and is in tight bond with the circumference surface of the shaft of a rotary valve, and the upper part is provided with an elastic hold-down mechanism. The present invention has the advantages of enhancement of engine power, increase of air tightness of the engine, structure simplification, volume reduction, attrition reduction and noise reduction.
Description
Technical field
The invention belongs to engine breathing mechanism technical field.
Background technique
Traditional motor is all formed gas distribution structure by parts such as rocking arm, pitman arm shaft, valve spring and valves, there is following defective: engine power loss big (about 15%), gas pressure and heat load cause that easily valve sealing and thermal conductivity descend, parts such as valve, rocking arm, cam type surface, minor sprocket are owing to the reciprocal inertia force of valve spring weares and teares, movable part is many, engine noise is big, complex structure, and the final assembly volume ratio of getting up is bigger.
Chinese patent literature CN1180132A discloses a kind of rotary columa type distributing device of motor, mainly by the rotating cylinder of road with holes groove and follower and be placed in the outer band of rotating cylinder, duct groove and motor and form into and out of the housing of pore and the middle pore that is communicated with cylinder, rotating cylinder is in rotation, through the duct groove inlet hole and middle pore are communicated with, pore is communicated with air outlet hole in making again, thereby advancing in the realization engine working process, pressure, exhaust acting, simplify the distribution process, reduced rate of fault etc.But this air distributing device is not resolved the tightness of distribution part, is difficult to realize.
Summary of the invention
The objective of the invention is at available engine gas distribution structure 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.
Technological scheme of the present invention is as follows:
A kind of piston compensated rotating valve intake and exhaust engine, comprise cylinder block, connecting rod, piston assembly and driving mechanism, rotary valve shaft passes across the cylinder head body, the end fixed chain wheels, sprocket wheel links to each other with the driving mechanism of motor by minor sprocket, rotary valve shaft is positioned at the part of cylinder head body and has along the circumferential direction dug a ventilating hole, and this ventilating hole is difference conducting firing chamber and suction port and relief opening in the rotary valve shaft rotary course.This structure has been removed the original distribution device of motor, and a compensating piston is installed in the cylinder head body of former arrangement distribution device relatively, is equipped with piston ring on the excircle of compensating piston, and forms sealing between the cylinder head body; 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 space that intersect in aforementioned three holes of compensating piston.
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 invention 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.Advantage of the present invention is:
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.
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 invention is owing to adopted the gas distribution structure of rotary valve shaft type, consumption of engine power not is 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 invention:
| 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) open cumulative time (°) | 0.89 230 | 0.99 230 |
| The time face amount * 103 (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 invention;
Fig. 2 is the structural drawing of rotary valve shaft distribution part of the present invention;
Fig. 3 is the structural drawing of rotary valve shaft of the present invention;
Fig. 4 is the A-A sectional drawing of Fig. 3;
Fig. 5 is the structural drawing of compensating piston of the present invention;
Fig. 6 is a fundamental diagram of the present invention;
Fig. 7 is a valve timing diagram of the present invention.
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 (7)
1, a kind of piston compensated rotating valve intake and exhaust engine, comprise cylinder block, connecting rod, piston assembly and driving mechanism, rotary valve shaft (1) passes across cylinder head body (14), end fixed chain wheels (19), sprocket wheel links to each other with the driving mechanism of motor by minor sprocket (20), rotary valve shaft (1) is positioned at the part of cylinder head body (14) and has along the circumferential direction dug a ventilating hole (16), and this ventilating hole is difference conducting firing chamber (3) and suction port (2) and relief opening (13) in the rotary valve shaft rotary course; 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 relatively, be equipped with piston ring on the excircle of compensating piston, and form sealing between the cylinder head body (14); 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 space that intersect in aforementioned three holes of compensating piston (10).
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), all be equipped with piston ring on the excircle of 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) is 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 engine according to claim 1 and 2, it is 130 ° that the circumference that it is characterized in that the ventilating hole (16) on 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 the ventilating hole (16) on the rotary valve shaft (1) is fan-shaped.
5, piston compensated rotating valve intake and exhaust engine according to claim 1 and 2 is characterized in that three holes (A, B, C) equate with the width K of ventilating hole (16) with the diameter of rotary valve shaft (1) contacting point.
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 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021279578A CN1314883C (en) | 2002-12-03 | 2002-12-03 | Piston compensated rotating valve intake and exhaust engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021279578A CN1314883C (en) | 2002-12-03 | 2002-12-03 | Piston compensated rotating valve intake and exhaust engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1414221A CN1414221A (en) | 2003-04-30 |
| CN1314883C true CN1314883C (en) | 2007-05-09 |
Family
ID=4745869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021279578A Expired - Fee Related CN1314883C (en) | 2002-12-03 | 2002-12-03 | Piston compensated rotating valve intake and exhaust engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1314883C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498781A (en) * | 2013-10-15 | 2014-01-08 | 贺文模 | Valve-block-free swash plate type compressor |
| CN104564449A (en) * | 2013-10-23 | 2015-04-29 | 陈月 | Air distribution mechanism with concave shaft |
| CN106870052B (en) * | 2017-04-18 | 2024-04-09 | 牛清锋 | Variable compression ratio mechanism of engine and valve system matched with variable compression ratio mechanism |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3526616A1 (en) * | 1985-07-25 | 1986-02-13 | Christian Dipl.-Ing. 8581 Glashütten Bock | Shaft valve for internal combustion engines with sprung bearing upper section and metal sealing shells |
| US5230314A (en) * | 1991-06-20 | 1993-07-27 | Mitsubishi Jukogyo Kabushiki Kaisha | 4-cycle engine |
| CN1180132A (en) * | 1996-09-03 | 1998-04-29 | 崔华峰 | Rotary columa type distributing device for engine |
| CN2327787Y (en) * | 1996-12-27 | 1999-07-07 | 欧阳文革 | Air valve assembly for four stroke engine |
| CN2583363Y (en) * | 2002-12-03 | 2003-10-29 | 伍本银 | Piston compensation rotary valve air inlet and exhaust engine |
-
2002
- 2002-12-03 CN CNB021279578A patent/CN1314883C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3526616A1 (en) * | 1985-07-25 | 1986-02-13 | Christian Dipl.-Ing. 8581 Glashütten Bock | Shaft valve for internal combustion engines with sprung bearing upper section and metal sealing shells |
| US5230314A (en) * | 1991-06-20 | 1993-07-27 | Mitsubishi Jukogyo Kabushiki Kaisha | 4-cycle engine |
| CN1180132A (en) * | 1996-09-03 | 1998-04-29 | 崔华峰 | Rotary columa type distributing device for engine |
| CN2327787Y (en) * | 1996-12-27 | 1999-07-07 | 欧阳文革 | Air valve assembly for four stroke engine |
| CN2583363Y (en) * | 2002-12-03 | 2003-10-29 | 伍本银 | Piston compensation rotary valve air inlet and exhaust engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1414221A (en) | 2003-04-30 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070509 Termination date: 20100104 |
