CN101881216B - Single cylinder two-stroke internal-combustion engine with crank circular slide block - Google Patents
Single cylinder two-stroke internal-combustion engine with crank circular slide block Download PDFInfo
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 67
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 230000002000 scavenging effect Effects 0.000 claims abstract description 28
- 230000033001 locomotion Effects 0.000 claims description 35
- 238000012546 transfer Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 9
- 230000004308 accommodation Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 14
- 239000002912 waste gas Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010304 firing Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The invention discloses a single cylinder two-stroke internal-combustion engine with a crank circular slide block. A crank circular slide block mechanism of the internal-combustion engine comprises a crank shaft, a circular slide block and a piston corresponding to the circular slide block; the piston is a double-acting piston of which both ends are provided with a working head respectively, and the piston is arranged in an air cylinder; the first working head at one end of the piston is used as a piston head of the internal-combustion engine, and a top surface of the first working head, an air cylinder inner wall and a cylinder cover arranged at one end of the air cylinder enclose to form a working cylinder; and the second working head is used as a scavenging piston head, and a top surface of the second working head, the air cylinder inner wall and a valve plate arranged at the other end of the air cylinder enclose to form a compressor air cylinder. The crank circular slide block mechanism also comprises a dynamic balance rotary block. Via an eccentric hole arranged on the dynamic balance rotary block, the dynamic balance rotary block sheathed on the same crank shaft together with the circular slide block is not directly connected with any reciprocating element and is fixed to the circular slide block as a mass member. The single cylinder two-stroke internal-combustion engine with a crank circular slide block is compact in structure and good in scavenging effect.
Description
Technical field
The present invention relates to a kind of internal-combustion engine, specifically is a kind of employing circular slider-crank mechanism single cylinder two-stroke internal-combustion engine.
Background technique
Internal-combustion engine is divided into quartastroke engine and two stroke IC engine.The application area of quartastroke engine is more extensive; An one of which complete working procedure comprises air inlet, compression, work done, four strokes of exhaust; In four strokes, have only expansion space stroke igniting work done, i.e. the igniting work done of two week of four stroke engine crank up is once; Different with quartastroke engine, two stroke IC engine only comprises the first and second two strokes, and bent axle whenever rotates a circle igniting once, promptly passes through the same operation cycle, and the two stroke IC engine expansion space stroke is the twice of quartastroke engine.These characteristics adds that two stroke IC engine need not be provided with the valve of control air inlet and exhaust, makes two stroke IC engine can obtain former weight/power ratio greater than quartastroke engine.
But the defective of two stroke IC engine also clearly.Owing to do not have special exhaust, intake stroke, the waste gas that a large amount of last operation cycles of existence are left in the inflammable mixture of two stroke IC engine has had a strong impact on combustion efficiency, causes the fuel-economy type of two stroke IC engine low excessively, has influenced its using scope.
Improve the fuel economy of two stroke IC engine, must make the waste gas of retaining in the inflammable mixture the least possible, for this reason, need to improve its scavenging efficiency; The major technique means of for this reason taking are to adopt pressurized air that cylinder is carried out scavenging, and this just needs to increase compressed-air actuated device, makes the entire internal combustion engine complex system.
At present general internal-combustion engine for adopt connecting rod as back and forth-transformation mechanism rotatablely moves.Because the existence of connecting rod in the connecting rod has introduced irregular motion for this mechanism, makes the movement process of machine complicated, can't realize the complete equilibrium that mechanism is whole; Connecting rod has also increased the stroke-bore ratio of mechanism, makes the entire mechanism size huge, heavy.
In order to address the above problem; Chinese patent document CN85100358A discloses a kind of " crankshaft circular slide block reciprocating piston internal combustion engine "; Chinese patent document CN85100359A open " a kind of crankshaft circalar slide block reciprocating piston compressor "; Chinese patent document CN1144879A discloses a kind of " crank and double-round slide reciprocating piston internal combustion engine ", and Chinese patent document CN1144880A discloses a kind of " crank and multi-round slide reciprocating piston internal combustion engine ".The common feature of above-mentioned internal-combustion engine is that the connecting rod to internal-combustion engine under the current techique has carried out thorough improvement, adopts the smooth block with eccentric circular hole to replace connecting rod.Said eccentric circle slide block is cylindrical, and has the eccentric circular hole that is parallel to cylinder axis, and this eccentric circular hole is used to pass the crank pin of bent axle.The piston of this internal-combustion engine comprises the bizet and the guide portion that is connected two bizets at two ends; Wherein have circular hole on the guide portion; The outer diametric plane of the aperture surface of this circular hole and above-mentioned smooth block matches, and said smooth block promptly is placed in the circular hole that matches with its periphery in the piston guide portion.When said piston receive combustion gas in the cylinder promotion and in cylinder during to-and-fro motion; Said smooth block rotates around the center of circle of himself; And and then drive bent axle and rotate; Thereby the to-and-fro motion of piston is converted into rotatablely moving of bent axle, again through the outside transmitted power of the rotary component that is connected with bent axle.
At above-mentioned Chinese patent document CN1144879A disclosed " crank and double-round slide reciprocating piston internal combustion engine "; And among the Chinese patent document CN1144880A disclosed " crank and multi-round slide reciprocating piston internal combustion engine ", be provided with the reciprocating dynamic balance slide block that has vertical track with piston.The setting of this dynamic balance slide block can be converted into the to-and-fro motion inertial force of piston the centrifugal force that is pointed to crank pin by crankshaft center, and can solve the some problem of living of circular slider-crank mechanism, has further strengthened the advantage of circular slider-crank mechanism.
When two stroke engine adopts above-mentioned circular slider-crank mechanism, need to improve scavenging efficiency equally.Whether possibly utilize the best solution of the characteristics acquisition raising two stroke engine scavenging efficiency of circular slider-crank mechanism, becoming one has technical problem to be solved.
The another one problem is; When employing has the circular slider-crank mechanism of dynamic balance slide block; Needing body is that dynamic balance slide block provides reciprocating guide rail, and in many cases, the to-and-fro motion guide rail of increase can cause the body processing difficulties; And weaken strength of machine body or rigidity, it is difficult to carry out.Especially when adopting two-stroke single cylinder machine structure; Artificer's main consideration is exactly that this structural type is fairly simple light and handy; If adopt dynamic balance slide block that it is carried out dynamic balancing, need to increase a cover reciprocating mechanism, and at body the to-and-fro motion track is set accordingly; Then this two-stroke single cylinder machine structure is just very complicated, has also lost the simple light and handy advantage of single cylinder engine.
Summary of the invention
The technical problem that the present invention solves is that a kind of crank round slider single cylinder two-stroke internal-combustion engine is provided, and it has utilized the structural feature of circular slider-crank mechanism, is increasing under the less situation of part, has improved the scavenging efficiency of two stroke IC engine; Simultaneously, under the situation that does not increase the to-and-fro motion track, make this internal-combustion engine acquisition have the reciprocal inertia force changing effect of the circular slider-crank mechanism of dynamic balance slide block, make single cylinder two-stroke internal-combustion engine keep its simple light and handy advantage.
Crank round slider single cylinder two-stroke internal-combustion engine provided by the invention, the circular slider-crank mechanism of said internal-combustion engine comprises the piston of bent axle, smooth block, corresponding above-mentioned smooth block; Said piston is the two-way ram that two ends all are provided with working head, and this piston is installed in the cylinder, and wherein first working head of an end is as the internal combustion engine head, and its end face and cylinder inner wall surround clutch release slave cylinder jointly with the cylinder cap that is installed on cylinder one end; Second working head of the piston the other end is as the scavenging piston head, and its end face and cylinder inner wall surround compresser cylinder jointly with the valve plate that is installed on the cylinder the other end; In the to-and-fro motion process of piston, second working head of this piston compresses the air in the compresser cylinder; Compressed air forms scavenge flow, gets into the clutch release slave cylinder scavenging through gas circuit; The circular slider-crank mechanism of said internal-combustion engine also comprises the dynamic balancing spin-block; The quality part that said dynamic balancing spin-block is enclosed within on the same crank pin of bent axle jointly for eccentric opening and above-mentioned smooth block through self, directly be not connected with any to-and-fro motion element and fix with above-mentioned smooth block; The barycenter of the axle center of said smooth block, said dynamic balancing spin-block and the axle center of crank pin all are projected on the plane perpendicular to crankshaft center line; Subpoint is followed successively by A, B, C; Then ∠ ACB equals 180 °, and the distance of AB is the crank radius e of twice.
Preferably, the quality of said dynamic balancing spin-block equals the quality of said piston, and the distance between the barycenter of this dynamic balancing spin-block and the eccentric opening axis equals crank radius e.
Preferably, said cylinder is arranged in the cylinder block; Have in the said cylinder block one with cylinder-bore axis the perpendicular and space of departing from the cylinder-bore axis certain distance, this space is that the motion of said dynamic balancing spin-block provides space.
Preferably, the gap between said cylinder block and the cylinder constitutes the gas circuit that scavenge flow passes through.
Preferably, said cylinder is the ladder-type cylinder, and said piston is the stage differential style piston; The corresponding said clutch release slave cylinder of cylinder section that the internal diameter of said ladder-type cylinder is less, the corresponding said compresser cylinder of the cylinder section that internal diameter is bigger; Accordingly, the diameter of first working head of said piston is corresponding with clutch release slave cylinder, for the diameter of stage differential style piston than small end; The diameter of said second working head is corresponding with the compresser cylinder internal diameter, is the bigger end of diameter of stage differential style piston.
Preferably, said stepped shaft cylinder is provided with the slide track type runway corresponding to the position of piston waist movement scope; Accordingly, the piston waist is provided with the skid shoe type slide plate corresponding to the slide track type runway.
Preferably; Said valve plate, air-intake valve plate is equipped with in its outside, the break-make of the inlet hole between this air-intake valve plate control UNICOM's compresser cylinder and the said gas circuit; Suction valve chip is equipped with in its inboard, the break-make of the suction port between this suction valve chip control UNICOM's compresser cylinder and the ambient atmosphere.
Preferably, said cylinder is installed in the cylinder block, and the gap between this cylinder and the cylinder block has constituted said gas circuit; The sidewall of said clutch release slave cylinder is provided with the transfer port that communicates with said gas circuit, on the clutch release slave cylinder sidewall, more near the position of cylinder cap, is provided with exhaust port than this transfer port.
Preferably, the center of gravity of said smooth block is on the axis of its eccentric opening.
Preferably, the outer rim of the crank pin root of said bent axle is provided with the external tooth section that has two teeth at least, the left and right sides of the end face of the circular slider accommodation hole of said piston, the internal tooth section of at least three teeth of setting; Aforementioned external teeth section and internal tooth section are meshing with each other when smooth block moves to 90 ° and 270 °.
Preferably, said gas circuit is provided with the bypass through the Air Valve Control break-make, and the outlet of this bypass is outside at this internal-combustion engine.
Crank round slider single cylinder two-stroke internal-combustion engine provided by the invention has adopted two-way ram, and wherein first working head is the internal combustion engine head, and second working head of the other end is the scavenging piston head; The compresser cylinder of said second working head and internal-combustion engine matches, and in the to-and-fro motion process of piston, air is compressed; Compressed air gets into the working cylinder scavenging through gas circuit.Above-mentioned internal-combustion engine has utilized the distinctive two-way ram of circular slider-crank mechanism, makes it in to-and-fro motion, can scavenge flow be provided while pressurized air.Traditional connecting rod can't utilize same piston to bear internal combustion engine and two functions of compressor piston simultaneously then owing to can not adopt two-way ram, element such as compressed pneumatic pump can only be installed in addition with the raising scavenge effect.By contrast, adopt two stroke IC engine of the present invention to realize that compressor and internal-combustion engine are integrated,, obviously reduced structure complexity having under the situation of identical scavenge effect; The present invention further is provided with the technological means of dynamic balancing spin-block as adjustment circular slider-crank mechanism whole machine balancing.Under the suitable situation of the centroid position of this dynamic balancing spin-block and quality settings; It is equivalent to dynamic balance slide block to the effect that the mass motion balance of circular slider-crank mechanism plays, and promptly can the reciprocal inertia force of piston be converted into the centrifugal force that is pointed to the crank pin center by crankshaft center.Because above-mentioned centrifugal force can make the equilibrium system of whole circular slider-crank mechanism obtain simplifying through the plain mode complete equilibrium of counterweight is set in positions such as flywheel or belt pulleys.Simultaneously,, make the structure of whole machine body also obtain simplifying because need not to above-mentioned dynamic balancing spin-block is provided with the to-and-fro motion track, and, reduced this cavity structure of to-and-fro motion track after, the rigidity of body is obviously improved with the structure of strength ratio employing dynamic balance slide block.
Description of drawings
Fig. 1 is the sectional view of the main structure of the crank round slider single cylinder two-stroke internal-combustion engine that provides of the embodiment of the invention;
Fig. 2 is the stage differential style structure of piston figure of the crank round slider single cylinder two-stroke internal-combustion engine that provides of the embodiment of the invention;
Fig. 3 is the annulus of stage differential style piston shown in Figure 2 and the structural drawing of ring baffle;
Fig. 4 is the structural drawing of the smooth block of the crank round slider single cylinder two-stroke internal-combustion engine that provides of the embodiment of the invention;
Fig. 5 is the structural drawing of the dynamic balancing spin-block of the crank round slider single cylinder two-stroke internal-combustion engine that provides of the embodiment of the invention;
Fig. 6 is the structural drawing that singly turns of the separated type bent axle of the crank round slider single cylinder two-stroke internal-combustion engine that provides of the embodiment of the invention;
Fig. 7 is the structural drawing of crank of the separated type bent axle of the crank round slider single cylinder two-stroke internal-combustion engine that provides of the embodiment of the invention.
Embodiment
The sectional view of the main structure of the crank round slider single cylinder two-stroke internal-combustion engine that Fig. 1 provides for the embodiment of the invention.
As shown in Figure 1, this crank round slider single cylinder two-stroke internal-combustion engine is provided with the cylinder block 2 of tubular, and this cylinder block 2 constitutes the main body of the shell of internal-combustion engine.In this cylinder block 2, be provided with ladder property cylinder 3, this ladder-type cylinder 3 is divided into different two sections of cylinder diameter in the axial direction.Cooperate this ladder-type cylinder 3 to be provided with stage differential style piston 4, this stage differential style piston 4 all is provided with the two-way ram of working head for two ends.Wherein, the first working head 4-1 is the internal combustion engine head, and this piston head cooperates with the path section of stepped shaft cylinder 3, and the whole range of movement during its work is in the path section of ladder-type cylinder 3, and this path section end is by cylinder cap 8 sealings, and its inner chamber constitutes clutch release slave cylinder 5; The end face of the said first working head 4-1 and clutch release slave cylinder 5 constitute the firing chamber of internal-combustion engine.The second working head 4-2 is the scavenging piston head; The big footpath section of this piston head and trapezoidal cylinder 3 matches; Whole range of movement during its work is the section in the big footpath of ladder-type cylinder 3 all; Valve plate 10 is equipped with in the end of the big footpath of said ladder-type cylinder section, and this valve plate 10 constitutes scavenging cylinder 9 jointly with the inner chamber of the big footpath of ladder-type cylinder section.
What more than introduce is the structural relation of stage differential style piston 4 and cylinder 2, and especially it constitutes the situation of cavity.The gas circuit structure of this two stroke IC engine below is described.
Said valve plate 10 separates the spatial joint clearance between said scavenging cylinder 9 and ambient atmosphere and cylinder block 1 and the cylinder 2.Specifically see also Fig. 1.Fig. 1 illustrates, and valve plate 10 is provided with the inlet hole of linking up interstitial site between scavenging cylinder 9 and cylinder block 1 and the cylinder 2, in valve plate 10 outsides air-intake valve plate 11 that covers this inlet hole is housed, and is used to control the break-make of this inlet hole; Because said air-intake valve plate 11 is arranged on the outside of valve plate 10, and it can only be opened laterally.Also be provided with the suction port of linking up scavenging cylinder 9 and outside atmosphere on the said valve plate 10, be provided with suction valve chip 12 in the inboard of valve plate 10,, it can only be opened to the inside because this suction valve chip 12 is arranged on the inboard of valve plate 10 to control the break-make of this suction port.In addition, be provided with transfer port 6 at the sidewall of said clutch release slave cylinder 5, the gas circuit of forming through the gap between cylinder block 1 and the ladder-type cylinder block 2 between the inlet hole of this transfer port 6 and said valve plate 10 is connected; At the sidewall of said clutch release slave cylinder 5, compare the position that said transfer port 6 slightly approaches cylinder cap 8, be provided with exhaust port 7.
The structure relevant with its circular slider-crank mechanism in this two stroke IC engine below is described.
The circular slider-crank mechanism of forming this two stroke IC engine comprises major parts such as stage differential style piston 4, smooth block 17, dynamic balancing spin-block 18, separated type bent axle 30.
Please be simultaneously referring to Fig. 2, this illustrates the structure of said stage differential style piston 4.Before address, said stage differential style piston 4 is a two-way ram, its first working head 4-1 is the internal combustion engine head, this piston head has top 4-1-1, head 4-1-2 and the skirt section 4-1-3 of ordinary internal combustion engine piston.The various piece structure is identical with ordinary internal combustion engine piston appropriate section with effect.The said second working head 4-2 is the scavenging piston head, and the piston of this piston head and common compressed pneumatic pump is identical, and its thinner thickness, outer edge surface are provided with the annular groove of some arrangement seal rings.That connect said first working head 4-1 and the said second working head 4-2 is piston seat 4-3, and the main body of this piston seat 4-3 is for thin block, and top and bottom are connected through the bottom surface of some ribs and the first working head 4-1 and the second working head 4-2 respectively.Be provided with the circular slider accommodation hole 4-4 of parallel axes in the neutral position of this piston seat 4-3 in the axis of bent axle 30.The position at the said circular slider accommodation hole 4-4 place of this piston 4 is called the waist of piston 4; Waist both sides at this piston; Be provided with skid shoe type slide plate 14; Position that should skid shoe type slide plate 14 in 3 pairs in said ladder-type cylinder is provided with slide track type runway 13, and said skid shoe type slide plate 14 cooperates with slide track type runway 13, for the to-and-fro motion of piston 4 provides support and leads.Fig. 2 is the main body of stage differential style piston 4; In fact; For the waist setting at this stage differential style piston 4 overcomes alive structure, also at two end faces of said circular slider accommodation hole 4-4, the ring baffle 4-6 through the outside fixes the annulus 4-5 with the internal tooth 4-5-1 of two sections symmetries respectively; Please referring to Fig. 3, this illustrates the situation that above-mentioned annulus 4-5 and ring baffle 4-6 combine.Above-mentioned ring baffle 4-6 is solidified as a whole with elastic rivet through the through hole 4-7 of symmetrically arranged three earhole 4-6-1 of periphery and piston 4 relevant positions.After the installation, the position of the internal tooth 4-5-1 on the said annulus 4-5 is in the left and right sides of said circular slider accommodation hole 4-4.
Please referring to Fig. 4, this figure is the structural representation of said smooth block 17.Said smooth block 17 is for to have the cylindrical block body that throw of eccentric is the first eccentric opening 17-1 of e, and said throw of eccentric is e, promptly equals crank throw; The barycenter of this smooth block 17 is positioned at the center of circle of its first eccentric opening 17-1.Drop on for the barycenter that guarantees this smooth block on the center of circle of the said first eccentric opening 17-1, on the structure of this smooth block 17, taked a lot of measures.At first, at the position that the first eccentric opening 17-1 is not set, on its both sides end face, be provided with meniscate going and weigh groove 17-2, and go to have three places symmetrical through hole not of uniform size among the heavy groove 17-2, as removing repeated hole 17-3 in crescent shape.In addition, be provided with thickening platform 17-5 in the position that is provided with the first eccentric opening 17-1 around this first eccentric opening 17-1.Through said structure, adjusted the barycenter of whole smooth block 17, make barycenter transfer to the home position of the first eccentric opening 17-1.In addition, Fig. 4 also is illustrated in the left and right sides of the said first eccentric opening 17-1, is symmetrically arranged with the first positioning hole 17-4, and this first positioning hole 17-4 is the structure that is used for fixing smooth block 17 and dynamic balancing spin-block 18.
Please referring to Fig. 5, this illustrates the structural drawing of said dynamic balancing spin-block 18.Said dynamic balancing spin-block 18 profiles and said smooth block 17 are similar, for having the cylindrical block body of the second eccentric opening 18-1; The said second eccentric opening 18-1 has identical diameter with the first eccentric opening 17-1 on the said smooth block 17, and the quality of this dynamic balancing spin-block 18 equals the quality of said piston 4, and the distance in the center of circle of its barycenter and the said second eccentric opening 18-1 is e.In the left and right sides of the said second eccentric opening 18-1, be respectively arranged with the second positioning hole 18-2, the first positioning hole 17-4 on said second positioning hole 18-2 and the said smooth block 17 is a counter structure.
Said separated type bent axle 30 comprises and singly turns 30-1 and two parts of crank 30-2.
Please referring to Fig. 6, what this illustrated said separated type bent axle 30 singly turns 30-1.Please be simultaneously referring to Fig. 7, this schemes the crank 30-2 of said separated type bent axle 30.Saidly singly turn the crank pin 30-1-2 that 30-1 has main journal 30-1-1 and stretches out from the biasing of the end face of main journal 30-1-1, the front end of this crank pin 30-1-2 is taper 30-1-4; Said crank 30-2 is through the taper hole 30-2-1 corresponding with the taper 30-1-4 of this crank pin front end, and singly turns 30-1 and matches.Singly turn the first location half hole 30-1-5 and second location, the half hole 30-2-2 that also are respectively arranged with mutual correspondence on the taper interface of 30-1 and crank 30-2, one has two pairs; When singly turning 30-1 and crank 30-2 cooperation for after the one; Said first location half hole 30-1-5 and second location, half hole 30-2-2 are combined to form the positioning pin hole of completion, just can realize singly turning 30-1 and crank 30-2 each other in the accurate location of circumferential angular dependence to wherein inserting locating stud.In addition, at the root of said crank pin 30-1-2, lean on a side of bent axle outer rim to be provided with external tooth section 30-1-3.Said crank 30-2 outer rim constitutes the forward spindle neck of this separated type bent axle 30, and the said main journal 30-1-1 outer rim that singly turns 30-1 constitutes the back main journal of this separated type bent axle 30.
After the above-mentioned circular slider-crank mechanism assembling; Said smooth block 17 is placed among the circular slider accommodation hole 4-4 of said piston 4; The crank pin 30-1-2 of said separated type bent axle 30 passes the eccentric opening 17-1 of said smooth block 17 and the eccentric opening 18-1 of said dynamic balancing spin-block 18, and 180 ° of the phase differences mutually of said smooth block 17 and said dynamic balancing spin-block 18, and both interfix; The mounting point of dynamic balancing spin-block 18 is outside said ladder-type cylinder 3, in cylinder block 2.Above-mentioned phase difference is 180 ° and can understands like this: the barycenter of the axle center of said smooth block, said dynamic balancing spin-block and the axle center of crank pin all are projected on the plane perpendicular to crankshaft center line, and subpoint is followed successively by A, B, C, and then ∠ ACB equals 180 °.The distance that on this basis, also need guarantee AB is the crank radius e of twice.In cylinder block 2, have and the axis normal of ladder-type cylinder 3 and the space of departing from confession dynamic balancing spin-block 18 motions of this axis certain distance.After assembling was accomplished, the skid shoe type slide plate 14 and the ladder-type cylinder 3 slide track type runways 13 of piston waist both sides matched.
Introduce the working condition of this two stroke IC engine below.
This internal combustion engine is divided into first stroke and two strokes of second stroke.Wherein first stroke is that piston moves to top dead center by lower dead center; Second stroke is that piston moves to lower dead center by top dead center.
During first stroke, the space of moving the scavenging cylinder 9 that makes the second working head 4-2 and ladder-type cylinder 3 big footpath sections on the piston increases, and air pressure reduces, and said suction valve chip 12 is open under the effect of external atmospheric pressure, makes ambient atmosphere flow into said scavenging cylinder 9; At this moment; Small amount of exhaust gas in the clutch release slave cylinder 5 of the first working head 4-1 promotion ladder-type cylinder of piston 4 gets into the gas circuit that the gap between cylinder block 1 and the ladder-type cylinder 2 is formed from said transfer port 6; Promoting said air-intake valve plate 11 closes; The air pressure that adds scavenging cylinder 9 reduces, and both draught heads are enough to air-intake valve plate 11 tight closure; Along with piston 4 further on move, said transfer port 6 is closed, the waste gas major part is discharged from said exhaust port 7.When piston 4 moved to top dead center position, said exhaust port 7 had been closed.At this moment, inflammable mixture is lighted, and the pressure of explosion of generation promotes said piston 4 and moves to lower dead center from top dead center, begins second stroke.
When said second stroke began, said scavenging cylinder 9 had been full of fresh air, and piston moves down the air pressure that has increased in the scavenging cylinder 9, said suction valve chip 12 compacted closure under the effect of this air pressure; Piston further moves down, and the transfer port 6 of clutch release slave cylinder 5 sidewalls is no longer covered by the first working head 4-1 of piston 4, simultaneously; Said air-intake valve plate 11 is opened under the effect of the air pressure that scavenging cylinder 9 increases; The fresh air that in first stroke, sucks in the scavenging cylinder 9 flows out through inlet hole, forms scavenge flow, and this scavenge flow flows to transfer port 6 through gas circuit; Flow into clutch release slave cylinder 5 through transfer port 6 and carry out scavenging, the waste gas of cleaning gets into ambient atmosphere through said exhaust port 7.
Through the above-mentioned process that moves in circles, make this two stroke IC engine obtain scavenge flow comparatively fully, obtain ventilation effect preferably, make the waste gas in the inflammable mixture of being lighted less, finally can obtain fuel economy preferably.
Because this two stroke IC engine adopts the crank round slider structure of having only a smooth block, make it have the some problem of living.The said point of living is that smooth block is when moving to 90 ° or 270 ° of phase places; When being the smooth block line that runs to the eccentric opening center of circle and the smooth block centre of form perpendicular to the position of piston 4 axis; The axis of smooth block and crankshaft center line overlap; Piston might stop linear reciprocating motion, and smooth block is the center rotation with the crankshaft center line.This possibility has caused the uncertain of motion state, and this phase point is called point alive.When internal combustion engine start, occurring living a piston that causes especially easily can't normal reciprocating problem.For this reason, on crank pin 30-1-1, be provided with external tooth section 30-1-3, be provided with internal tooth 4-5-1 in the left and right sides of circular slider accommodation hole 4-4 simultaneously; At least two teeth of aforementioned external teeth section 30-1-3, at least three teeth of internal tooth section 4-5-1; Like this; When moving to point alive position, external tooth section 30-1-3 and internal tooth section 4-5-1 mesh just, and rotatablely moving of bent axle 30 stirred piston 4 through above-mentioned meshing relation; Force piston to move back and forth, avoided piston 4 to take place in the situation of this position stop motion.
In the reciprocating motion of the pistons process,, make said piston obtain reciprocating rail supported with less resistance because the slide track type runway 13 of skid shoe type slide plate 14 and ladder-type cylinder 3 cooperatively interacts.
Adopted dynamic balancing spin-block 18 in this embodiment, precedingly addressed, the quality of this dynamic balancing spin-block 18 equals the quality of said piston 4, and the distance in its barycenter and the eccentric opening center of circle is e; This dynamic balancing spin-block 18 is enclosed within on the crank pin equally, and is fixed as one and differs 180 ° of phase places with said smooth block 17.Like this; When mechanism kinematic; Said dynamic balancing spin-block 18 is along with motion together; And the movement locus of its barycenter is for being the linear reciprocating motion of certain distance perpendicular to the to-and-fro motion track of said piston 4 and with the to-and-fro motion track of this piston 4, and its stroke is identical with the distance between the lower dead center with the top dead center of piston 4, is 4e.In fact; This dynamic balancing spin-block 18 is as far as the effect of the whole machine balancing of system; The dynamic balance slide block that is equivalent to disclosed crank and double-round slide mechanism among the Chinese patent document CN1144879A; After this dynamic balancing spin-block was set, the reciprocal inertia force of the reciprocal inertia force of said piston 4 and said dynamic balancing spin-block 18 finally synthesized a rotary centrifugal force that points to the crank pin center from crankshaft center.Like this, just can be through balancer weight is set on flywheel or belt pulley easily with this centrifugal force complete equilibrium, final whole circular slider-crank mechanism will obtain good dynamic balancing effect.
In the mechanism of above-mentioned employing dynamic balancing spin-block, need in cylinder block 2, reserve enough revolution spaces for it, avoid moving interference.In addition, although this dynamic balancing spin-block can play the counterbalance effect identical with dynamic balance slide block to circular slider-crank mechanism, can't play the effect that helps piston 4 to overcome point alive.Therefore, this mechanism still will be provided with the mechanism that external tooth section 30-1-3 and internal tooth section 4-5-1 etc. overcome the point of living.
Although barycenter and quality to the dynamic balancing spin-block in the present embodiment have been carried out strict setting; But; Under the situation of not imposing the optimum balance effect; This dynamic balancing spin-block also can not adopt the quality and the barycenter requirement of above-mentioned strictness, can improve whole machine balancing as long as increase this dynamic balancing spin-block.In addition, the said device that overcomes the point of living can be provided with in order to guarantee mechanism in stable operation, therefore; If the mechanism that overcomes the point of living is not set; As long as piston is not in point midway when starting, generally motion problems can not appear, so this mechanism that overcomes the point of living can not be provided with yet yet.
In the above embodiment of the present invention, the said second piston head 4-2 and said scavenging cylinder 9 be common to constitute the air compressor structures, and the firing chamber that its pressurized air that provides offers this internal-combustion engine through gas circuit is as scavenge flow.In fact, because the pressurized air that above-mentioned air compressor structure provides can not only satisfy the needs of scavenge flow, can also bypass be set on gas circuit, offer the outside as source of compressed air, promptly this two stroke engine can use as air compressor simultaneously.Its concrete structure is exactly in the gas circuit position of the foregoing description bypass to be set, and this bypass is provided with the Air Valve Control break-make, and its outlet is arranged on the internal-combustion engine outside; Above-mentioned improvement can be made on the basis of above-mentioned two stroke IC engine easily.
Though the present invention with preferred embodiment openly as above; But it is not to be used for limiting the present invention; Any those skilled in the art are not breaking away from the spirit and scope of the present invention; Can make possible change and modification, so protection scope of the present invention should be as the criterion with the scope that claim of the present invention was defined.
Claims (11)
1. a crank round slider single cylinder two-stroke internal-combustion engine is characterized in that, the circular slider-crank mechanism of said internal-combustion engine comprises the piston of bent axle, smooth block, corresponding above-mentioned smooth block; Said piston is the two-way ram that two ends all are provided with working head, and this piston is installed in the cylinder, and wherein first working head of an end is as the internal combustion engine head, and its end face and cylinder inner wall surround clutch release slave cylinder jointly with the cylinder cap that is installed on cylinder one end; Second working head of the piston the other end is as the scavenging piston head, and its end face and cylinder inner wall surround compresser cylinder jointly with the valve plate that is installed on the cylinder the other end; In the to-and-fro motion process of piston, second working head of this piston compresses the air in the compresser cylinder; Compressed air forms scavenge flow, gets into the clutch release slave cylinder scavenging through gas circuit; The circular slider-crank mechanism of said internal-combustion engine also comprises the dynamic balancing spin-block; The quality part that said dynamic balancing spin-block is enclosed within on the same crank pin of bent axle jointly for eccentric opening and above-mentioned smooth block through self, directly be not connected with any to-and-fro motion element and fix with above-mentioned smooth block; The barycenter of the axle center of said smooth block, said dynamic balancing spin-block and the axle center of crank pin all are projected on the plane perpendicular to crankshaft center line; Subpoint is followed successively by A, B, C; Then ∠ ACB equals 180 °, and the distance of AB is the crank radius e of twice.
2. crank round slider single cylinder two-stroke internal-combustion engine according to claim 1 is characterized in that, the quality of said dynamic balancing spin-block equals the quality of said piston, and the distance between the barycenter of this dynamic balancing spin-block and the eccentric opening axis equals crank radius e.
3. crank round slider single cylinder two-stroke internal-combustion engine according to claim 1 is characterized in that said cylinder is arranged in the cylinder block; Have in the said cylinder block one with cylinder-bore axis the perpendicular and space of departing from the cylinder-bore axis certain distance, this space is that the motion of said dynamic balancing spin-block provides space.
4. crank round slider single cylinder two-stroke internal-combustion engine according to claim 3 is characterized in that, the gap between said cylinder block and the cylinder constitutes the gas circuit that scavenge flow passes through.
5. crank round slider single cylinder two-stroke internal-combustion engine according to claim 1 is characterized in that, said cylinder is the ladder-type cylinder, and said piston is the stage differential style piston; The corresponding said clutch release slave cylinder of cylinder section that the internal diameter of said ladder-type cylinder is less, the corresponding said compresser cylinder of the cylinder section that internal diameter is bigger; Accordingly, the diameter of first working head of said piston is corresponding with clutch release slave cylinder, for the diameter of stage differential style piston than small end; The diameter of said second working head is corresponding with the compresser cylinder internal diameter, is the bigger end of diameter of stage differential style piston.
6. crank round slider single cylinder two-stroke internal-combustion engine according to claim 5 is characterized in that, said ladder-type cylinder is provided with the slide track type runway corresponding to the position of piston waist movement scope; Accordingly, the piston waist is provided with the skid shoe type slide plate corresponding to the slide track type runway.
7. crank round slider single cylinder two-stroke internal-combustion engine according to claim 1; It is characterized in that; Said valve plate, air-intake valve plate is equipped with in its outside, the break-make of the inlet hole between this air-intake valve plate control UNICOM's compresser cylinder and the said gas circuit; Suction valve chip is equipped with in its inboard, the break-make of the suction port between this suction valve chip control UNICOM's compresser cylinder and the ambient atmosphere.
8. crank round slider single cylinder two-stroke internal-combustion engine according to claim 7 is characterized in that said cylinder is installed in the cylinder block, and the gap between this cylinder and the cylinder block has constituted said gas circuit; The sidewall of said clutch release slave cylinder is provided with the transfer port that communicates with said gas circuit, on the clutch release slave cylinder sidewall, more near the position of cylinder cap, is provided with exhaust port than this transfer port.
9. crank round slider single cylinder two-stroke internal-combustion engine according to claim 1 is characterized in that the center of gravity of said smooth block is on the axis of its eccentric opening.
10. crank round slider single cylinder two-stroke internal-combustion engine according to claim 1; It is characterized in that; The outer rim of the crank pin root of said bent axle is provided with the external tooth section that has two teeth at least, the left and right sides of the end face of the circular slider accommodation hole of said piston, the internal tooth section of at least three teeth of setting; Aforementioned external teeth section and internal tooth section are meshing with each other when smooth block moves to 90 ° and 270 °.
11. according to any described crank round slider single cylinder two-stroke internal-combustion engine of claim 1-10, it is characterized in that said gas circuit is provided with the bypass through the Air Valve Control break-make, the outlet of this bypass is outside at this internal-combustion engine.
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| CN 201010215956 CN101881216B (en) | 2010-07-02 | 2010-07-02 | Single cylinder two-stroke internal-combustion engine with crank circular slide block |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010215956 CN101881216B (en) | 2010-07-02 | 2010-07-02 | Single cylinder two-stroke internal-combustion engine with crank circular slide block |
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| CN101881216B true CN101881216B (en) | 2012-09-26 |
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| CN86210915U (en) * | 1986-12-30 | 1987-10-31 | 吉林工业大学 | Reciprocating piston internal combustion engine with eccentric cylindrical slider |
| CN101614158A (en) * | 2009-07-24 | 2009-12-30 | 北京中清能发动机技术有限公司 | A kind of double-stroke reciprocating piston internal combustion engine with crank circular slide block |
| CN101655050A (en) * | 2009-06-10 | 2010-02-24 | 北京中清能发动机技术有限公司 | Piston for two-stroke crank round sliding block internal-combustion engine and internal-combustion engine thereof |
| CN201517602U (en) * | 2009-08-26 | 2010-06-30 | 北京中清能发动机技术有限公司 | Round slide block group of crank round slide block mechanism and internal-combustion engine and compressor thereof |
| CN201705464U (en) * | 2010-07-02 | 2011-01-12 | 北京中清能发动机技术有限公司 | Single-cylinder two-stroke internal-combustion engine with crank and round slider mechanism |
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2010
- 2010-07-02 CN CN 201010215956 patent/CN101881216B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86210915U (en) * | 1986-12-30 | 1987-10-31 | 吉林工业大学 | Reciprocating piston internal combustion engine with eccentric cylindrical slider |
| CN101655050A (en) * | 2009-06-10 | 2010-02-24 | 北京中清能发动机技术有限公司 | Piston for two-stroke crank round sliding block internal-combustion engine and internal-combustion engine thereof |
| CN101614158A (en) * | 2009-07-24 | 2009-12-30 | 北京中清能发动机技术有限公司 | A kind of double-stroke reciprocating piston internal combustion engine with crank circular slide block |
| CN201517602U (en) * | 2009-08-26 | 2010-06-30 | 北京中清能发动机技术有限公司 | Round slide block group of crank round slide block mechanism and internal-combustion engine and compressor thereof |
| CN201705464U (en) * | 2010-07-02 | 2011-01-12 | 北京中清能发动机技术有限公司 | Single-cylinder two-stroke internal-combustion engine with crank and round slider mechanism |
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| CN101881216A (en) | 2010-11-10 |
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