CN108518279B - Improve the method for engine effective thermal efficiency and its power transmission mechanism of preparation - Google Patents
Improve the method for engine effective thermal efficiency and its power transmission mechanism of preparation Download PDFInfo
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- CN108518279B CN108518279B CN201810308941.XA CN201810308941A CN108518279B CN 108518279 B CN108518279 B CN 108518279B CN 201810308941 A CN201810308941 A CN 201810308941A CN 108518279 B CN108518279 B CN 108518279B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/32—Engines characterised by connections between pistons and main shafts and not specific to preceding main groups
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Abstract
The invention discloses the power transmission mechanisms of the method and its preparation that improve engine effective thermal efficiency, the eccentricity of engine power transmission mechanism is set, eccentricity be crankshaft center line between piston rod and crank connecting link connecting pin axis at a distance from, piston rod and crank connecting link connecting pin are located above crankshaft center point, perhaps eccentricity be crankshaft center line between smooth block upper pin and crank connecting link connecting pin axis at a distance from or eccentricity be crankshaft center line between piston and crank connecting link connecting pin axis at a distance from.Its power increase rate is big, saves and uses oil, and exhaust contaminant is low；Power is high, and torque is big；Working stroke is accelerated, and conducive to the raising of burning and compression ratio, reduces thermal loss；Components are few, and production cost is low；Length of connecting rod can be made to reduce, keep overall mechanism compact；Crankshaft negative bias makes crankshaft splashing lubricating oil be constantly being directed towards piston when rotating, and piston/cylinder lubricates, and machine oil radiates by force to piston, big long service life of engine operation intensity etc..
Description
Technical field
It is the power transmission machine of a kind of method for improving engine effective thermal efficiency and its preparation the present invention relates to engine
Structure.
Background technique
Current published various engine power transmission mechanisms are by crank link mechanism and crankshaft by piston
Reciprocating motion is converted into rotary motion, and crankshaft is driven by piston rod and done work.Divide single axis and double-crankshaft again in these structures
Structure is specifically also divided without biasing and have bias structure.Though the engine power transmission mechanism of these structures has their own advantages, it is not
Foot still has, such as: there is the lateral pressure of alternation, shadows between the piston and cylinder wall without biasing engine of single axle construction
The friction power loss of piston and cylinder inner room is rung, statistical data shows that this friction power loss accounts for 75% left side of engine mechanical loss
The right side, and the friction power loss of cylinder sleeve and piston ring accounts for the 50% of piston connecting bar system, therefore, usually adopts to reduce side pressure of piston
With crankshaft offset placement, however, by published technical solution it is found that offset crankshaft structure can be eliminated under normal circumstances starts
The lateral pressure of machine piston and cylinder wall reduces friction and vibration, since those skilled in the art think that working stroke is revolved in crankshaft
Gyration accounting is bigger, and acting is more, so, crankshaft connecting rod system only rotates acting with positive bias direction.But these positively biaseds
The engine power transmission mechanism that the mode of setting is arranged keeps the increase rate of engine effective thermal efficiency smaller.
Summary of the invention
The object of the present invention is to provide it is a kind of raising engine effective thermal efficiency method and its preparation power transmission mechanism,
It can solve the deficiencies in the prior art.
The present invention to achieve the above object, using following technical scheme: a method of improve engine effective thermal efficiency,
The eccentricity of engine power transmission mechanism is set, and eccentricity is between crankshaft center line and piston rod and crank connecting link connecting pin axis
Distance, piston rod and crank connecting link connecting pin are located at crankshaft center point top or eccentricity is crankshaft center line and smooth block
Distance or eccentricity between upper pin and crank connecting link connecting pin axis are crankshaft center line and piston and crank connecting link connecting pin
Distance between axis；
Eccentric distance e is set and is greater than throw of crankshaft R；
Two crankshafts are arranged in a manner of negative bias；
The difference of crank link length L and throw of crankshaft R is set except the quotient of eccentric distance e is biasing mechanism coefficient；
Setting biasing mechanism coefficient is 0.60-0.98, provides engine power transmission mechanism with biasing mechanism coefficient.
The biasing mechanism coefficient is 0.60-0.95.
The biasing mechanism coefficient is 0.75-0.98.
The biasing mechanism coefficient is 0.6-0.75.
The biasing mechanism coefficient is 0.75-0.95.
A kind of power transmission mechanism for the method preparation improving engine effective thermal efficiency, including cylinder, the interior installation of cylinder
Piston, piston are connect by connector with crank connecting link, and crank connecting link is connect by crank axle with crank, and crank and crankshaft connect
Connect, crankshaft be two, be arranged eccentricity, eccentricity be between crankshaft center line and piston rod and crank connecting link connecting pin axis away from
From piston rod is located above crankshaft center point with crank connecting link connecting pin or eccentricity is sold on crankshaft center line and smooth block
Distance or eccentricity between axis and crank connecting link connecting pin axis are crankshaft center line and piston and crank connecting link connecting pin axis
Between distance, eccentricity be greater than throw of crankshaft, the angular interval that working stroke crank turns over be less than 180 degree.
The further scheme is that piston 2 is installed in cylinder 1, and smooth block 15 is installed on piston, is installed on smooth block 15
First pin shaft 3 and the second pin shaft 14, the first pin shaft 3 are connect with one end of the first crank connecting link 4, the first crank connecting link 4 it is another
End is connect by the first crank axle 6 with 7 one end of the first crank, and 7 other end of the first crank is connect with the first crankshaft 8, the first crankshaft
8 connected first synchromesh gears 5, the 4 connecting pin axis of axis and the first crank connecting link of the axis of the first crankshaft 8 and the first pin shaft 3
Between distance be eccentric distance e, eccentric distance e be greater than the first crank 7 radius R, 13 one end of the second pin shaft 14 and the second crank connecting link
Connection, 13 other end of the second crank connecting link are connect by the second crank axle 11 with 10 one end of the second crank, and the second crank 10 is another
End is connect with the second crankshaft 9, and the second crankshaft 9 is connected the second synchromesh gear 12, and the first synchromesh gear 5 and the second synchromesh gear 12 are nibbled
It closes, the first crankshaft 8 rotates clockwise, and the second crankshaft 10 is rotated counterclockwise by connected synchromesh gear.
The difference of the crank link length L and throw of crankshaft R are 0.6-0.98 except the quotient of eccentric distance e.
The difference of the crank link length L and throw of crankshaft R are 0.75-0.95 except the quotient of eccentric distance e.
The difference of the crank link length L and throw of crankshaft R are 0.75-0.98 except the quotient of eccentric distance e.
Present invention firstly provides a kind of method for improving engine effective thermal efficiency, this method is limited to engine function
With in the structure of double-crankshaft negative bias arrangement, biasing mechanism coefficient is preferred in rate transmission mechanism: 0.60-0.98,0.75-0.95,
0.75-0.98 or 0.60-0.75.
Method of the present invention has exceeded those skilled in the art, and that biasing mechanism coefficient is arranged in negative bias mechanism is small
In or equal to 0.1 idea.Those skilled in the art are it has long been believed that negative bias knot in various engine power transmission mechanisms
Biasing coefficient in structure cannot be greater than 0.1, and this idea is more in the bigger acting of crankshaft rotation angle accounting based on working stroke,
However, it is considered herein that greatly improving the arm of force coefficient of engine acting when crankshaft is with negative bias direction rotary work, capable of putting
The biasing mechanism coefficient of de- negative bias mechanism is less than or equal to 0.1 constraint, therefore, the present invention set biasing mechanism coefficient as
0.60-0.98,0.75-0.95,0.75-0.98 or 0.60-0.75, these biasing mechanism coefficients can make the effective thermal effect of engine
Rate has a more substantial increase.
Negative bias Double-crank shaft bar linkage arm of force coefficient provided by the invention is ζR, F；
In I formula: L is crank link length, and R is throw of crankshaft, and e is eccentricity,α
For crankshaft rotation angle.
By I formula it is found that the size of arm of force coefficient depends on crankshaft and negative bias and crank connecting link Impact direction, meanwhile, with
Eccentric distance e is positively correlated, and related to crank link length L and throw of crankshaft R, therefore, the bias that setting crankshaft negative bias is arranged
It can determine the geometrical characteristic of Double-crank shaft bar linkage away from the variation of e, crank link length L and throw of crankshaft R, therefore, use σpzTable
Show that biasing mechanism coefficient is σpz=e/ (L-R), it may be assumed that biasing mechanism coefficient is that the difference of crank link length and throw of crankshaft R is removed partially
Quotient of the heart away from e.Biasing mechanism coefficient 0.60-0.98,0.75-0.95,0.75-0.98 or 0.60-0.75 situation is set as a result,
Under, increasing crankshaft negative bias arm of force coefficient can be improved the transimission power of engine power transmission mechanism, that is, improving engine has
Imitate the thermal efficiency.
The characteristics of power transmission mechanism of the raising engine effective thermal efficiency provided with the method for the invention, also resides in:
Power increase rate is big, saves and uses oil, and exhaust contaminant is low；Power is high, and torque is big；Working stroke is accelerated, and burning and pressure are conducive to
The raising of contracting ratio reduces thermal loss；Components are few, and production cost is low；Length of connecting rod can be made to reduce, keep overall mechanism compact；
Crankshaft negative bias makes crankshaft splashing lubricating oil be constantly being directed towards piston when rotating, and piston/cylinder lubricates, and machine oil radiates by force to piston,
Big long service life of engine operation intensity etc..
Detailed description of the invention
Attached drawing 1 is negative bias double crankshaft connecting rod power transmission mechanism schematic diagram of the present invention；Attached drawing 2 is biasing mechanism
Crankshaft-link rod arm of force charts for finned heat when coefficient is 0.75；Attached drawing 3 be biasing mechanism coefficient be 0.95 when crankshaft-link rod power
Arm charts for finned heat；Attached drawing 4 is biasing mechanism coefficient when being 0.91 crankshaft-link rod negative bias reverse drawing, negative bias, positive bias and nothing
Offset operation mode respectively shaft work value with without biasing the ratio between working method shaft work value；Attached drawing 5 be biasing mechanism coefficient be 0.91 when
The P-V of positive bias and negative bias reverse drawing power transmission mechanism engine schemes；Attached drawing 6 is that power experiment biasing mechanism coefficient is
0.60 crankshaft-link rod arm of force charts for finned heat.
Specific embodiment
Compareing attached drawing, the present invention will be further described.
A kind of method improving engine effective thermal efficiency of the present invention, is arranged the inclined of engine power transmission mechanism
The heart away from, eccentricity be crankshaft center line between piston rod and crank connecting link connecting pin axis at a distance from, piston rod and crank connecting link connect
End is connect above crankshaft center point or eccentricity is crankshaft center line and smooth block upper pin and crank connecting link connecting pin axis
Between distance or eccentricity be crankshaft center line between piston and crank connecting link connecting pin axis at a distance from；
Eccentric distance e is set and is greater than throw of crankshaft R；
Two crankshafts are arranged in a manner of negative bias；
The difference of crank link length L and throw of crankshaft R is set except the quotient of eccentric distance e is biasing mechanism coefficient；
Setting biasing mechanism coefficient is 0.60-0.98, provides engine power transmission mechanism with biasing mechanism coefficient.
The connection of piston and crank connecting link can be realized there are many mode in double-crankshaft negative bias arrangement of the present invention: 1.
Piston is connect with piston rod, and piston rod is connect with two crank connecting links respectively, the connecting pin position of piston rod and two crank connecting links
Above crankshaft center point, eccentricity be crankshaft center line between piston rod and crank connecting link connecting pin axis at a distance from；2. piston
Upper installation smooth block installs two pin shafts on smooth block, and each pin shaft is connect with respective crank connecting link respectively, at this point, eccentric
Away from be then crankshaft center line between smooth block upper pin and crank connecting link connecting pin axis at a distance from；3. piston directly respectively with two
Crank connecting link connection, at this point, eccentricity be then crankshaft center line between piston and crank connecting link connecting pin axis at a distance from.
The biasing mechanism coefficient is 0.60-0.95.
The biasing mechanism coefficient is 0.75-0.98.
The biasing mechanism coefficient is 0.6-0.75.
The biasing mechanism coefficient is 0.75-0.95.
Method of the present invention overcomes the prejudice of those skilled in the art for a long time.Present invention research is thought, mentions
High arm of force coefficient maximum value is simultaneously close to the crankshaft that maximum combustion pressure generates in double crankshaft connecting rod power transmission mechanism as far as possible
Corner can reach the efficiency of transmission for improving engine power transmission mechanism, that is, improve engine effective thermal efficiency.
Table 1: biasing mechanism factor sigmapzWith crankshaft difference bias mode arm of force coefficient maximum value ζR, maxCorresponding crankshaft rotation angle
Angle value θmaxChange table (λ=1/3.5, λ indicate connecting rod ratio)
By upper table data it is found that when biasing mechanism coefficient changes from small to big: 1. crankshaft positive bias arm of force index variation is little, and
Corresponding crank angle is gradually distance from top dead centre；2. crankshaft negative bias arm of force coefficient increase rate is big, but corresponding crank angle is gradually
Far from top dead centre, when biasing mechanism coefficient increases since 0.4, arm of force coefficient increases gently, biasing mechanism coefficient from 0.6 again
Arm of force coefficient quicklys increase when increasing upwards；3. 0.4 arm of force coefficient maximum value of biasing mechanism coefficient corresponds to crank angle 94.06
Degree deviates too far away from the maximum top dead centre of cylinder pressure, turns when 0.60 arm of force coefficient maximum value of biasing mechanism coefficient corresponds to crankshaft
86.20 degree of angle, it is also ideal to increase the corresponding crank angle variation of arm of force coefficient maximum value increase for biasing mechanism coefficient later.Institute
Preferred arrangement is arranged as with crankshaft negative bias.
Currently preferred biasing mechanism coefficient be 0.6-0.98, further preferred 0.75-0.98,0.75-0.95 or
0.6-0.75.When biasing mechanism coefficient is 0.6-0.75, effect is better than 0.4-0.59.
Relationship between the biasing mechanism coefficient and power of engine power transmission mechanism of the present invention has large change.
Table 2 is that the power of two kinds of bias modes of twin crankshaft engine tests output data
Unit: W
σ in table 2pzBiasing mechanism coefficient, e- eccentricity, L- crank link length, R- throw of crankshaft, S- piston stroke.
As shown in Table 2, when biasing mechanism coefficient is 0.6-0.95, the engine power output mechanism of crankshaft negative bias
Power is substantially higher than the power of the crankshaft positive bias power output mechanism of the prior art.
L=9.4 centimetres of length of connecting rod, R=2.07 centimetres of throw of crankshaft, eccentric amount e=4.42 centimetre described in table 2, biasing
Mechanism factor sigmapz=0.6, connecting rod arm of force coefficient curve is referring to Fig. 6.Ratio is being just when measuring cylinder cap temperature negative bias working condition for experiment
It is low when offset operation state, it was demonstrated that thermal losses is small when negative bias working condition, so that the thermal efficiency improves.
Crankshaft negative bias of the present invention refers to the angle that the working stroke crank of engine power output mechanism turns over
Section is less than 180 degree, as shown in Figure 1.The referred to as crankshaft positively biased when the angular interval that working stroke crank turns over is greater than 180 degree
It sets.
Piston stroke S increases as biasing mechanism coefficient increases in table 2, so that engine displacement increases, the function obtained
Rate value can not vertical analysis compare, it is necessary to eliminate piston stroke in proportion and increase influence to magnitude of power.With biasing mechanism system
When several 0.60,4.74 centimetres of piston stroke, on the basis of traditional positive bias performance number 901W, first find out other biasing mechanism coefficients
The respective piston stroke of value increases ratio, then increases the product of ratio and reference power value (901w) with stroke, except respective tradition
Positive bias, negative bias performance number, obtaining quotient is power correction ratio, that is, relative to the positively biased output effect of benchmark tradition
Rate.
Table 3: the power experiment amendment ratio table of table 2
| σpz | S(cm) | Stroke increases ratio | Positive bias | Negative bias |
| 0.60 | 4.74 | 1.000 | 1.000 | 1.061 |
| 0.75 | 5.22 | 1.101 | 0.996 | 1.076 |
| 0.85 | 5.74 | 1.211 | 0.990 | 1.093 |
| 0.90 | 6.19 | 1.306 | 0.986 | 1.103 |
| 0.95 | 6.91 | 1.458 | 0.982 | 1.127 |
3 data of table show that the biasing mechanism coefficient and delivery efficiency of the power transmission mechanism are learnt in traditional one column of positive bias
It is negatively correlated.One column of negative bias learns that the biasing mechanism coefficient of the power transmission mechanism and delivery efficiency are positively correlated, delivery efficiency list
It adjusts big.Delivery efficiency reaches high point, delivery efficiency when biasing mechanism coefficient continues to increase to 0.95 when biasing mechanism coefficient 0.85
A high position is maintained to be declined slightly.
The engine effective thermal efficiency transmission mechanism that the method for the invention limits is Double-crank shaft bar linkage, such as Fig. 1 institute
Show, the steering of the first crankshaft 8 be it is clockwise, the steering of the second crankshaft 9 is the second pin shaft counterclockwise, on crankshaft center line and piston
Eccentricity is set between center and crank connecting link connecting pin axis, and eccentric distance e is greater than throw of crankshaft R.Two crankshaft negative bias arrangements.
The shell of engine power transmission mechanism, cylinder and same as the prior art with the connection relationship installation site of other components etc..
When crankshaft connecting rod system movement, eccentricity is center and the movement of crank connecting link connecting shaft of crankshaft center line and smooth block upper pin
The distance of center line, at a distance from eccentricity can also be crankshaft center line between piston and crank connecting link connecting shaft centre of motion line,
At a distance from eccentricity can also be crankshaft center line between piston rod and crank connecting link connecting shaft centre of motion line, piston rod and crank
Connecting rod connecting pin is located above crankshaft center point.
Each component locations of the present invention are shown position.
The applicable engine power transmission mechanism embodiment as shown in Figure 1 of the method for the invention, but the present invention is not limited to
Embodiment.Since the connection of the components such as shell, cylinder in transmission mechanism and structure as shown in the figure is well-known technique, therefore Fig. 1
Shown is Double-crank shaft bar linkage schematic diagram.
Embodiment is that the double-crankshaft negative bias of raising engine effective thermal efficiency power transmission mechanism is arranged as shown in Figure 1
Link mechanism, in negative bias structure shown in Fig. 1, the connection of piston and crank connecting link is pin shaft by smooth block and thereon
It realizes, this is one of preferred embodiment.The structure that piston is connect with crank connecting link may also is that piston connects with two cranks respectively
Piston rod is connected on one end connection of bar or piston, the other end of piston rod is connect with two crank connecting links respectively, piston rod
It is located above two crankshaft center points with two crank connecting link connecting pins.
1 is cylinder in Fig. 1, and piston 2 is installed in cylinder 1, and smooth block 15 is installed on piston, the first pin of installation on smooth block 15
Axis 3 and the second pin shaft 14, the first pin shaft 3 are connect with one end of the first crank connecting link 4, and the other end of the first crank connecting link 4 passes through
First crank axle 6 is connect with 7 one end of the first crank, and 7 other end of the first crank is connect with the first crankshaft 8, and the first crankshaft 8 is connected
First synchromesh gear 5, between the 4 connecting pin axis of axis and the first crank connecting link of the axis of the first crankshaft 8 and the first pin shaft 3 away from
From for eccentric distance e, eccentric distance e is greater than the radius R of the first crank 7, and the second pin shaft 14 is connect with 13 one end of the second crank connecting link, the
Two crank connecting links, 13 other end is connect by the second crank axle 11 with 10 one end of the second crank, 10 other end of the second crank and second
Crankshaft 9 connects, and the second crankshaft 9 is connected second synchromesh gear 12, and the first synchromesh gear 5 and the second synchromesh gear 12 engage, and first
Crankshaft 8 rotates clockwise, and the second crankshaft 10 is rotated counterclockwise by connected synchromesh gear.The crankshaft-link rod machine of second crankshaft 9
Structure is using 2 centre of motion line of piston as the crankshaft connecting rod system symmetric motion of plane and the first crankshaft 8.Working stroke crank turns over
Angular interval is less than 180 degree.First crank, 7 vertical line position f is 0 degree of starting point, and the angle between the first crank 7 and the starting point is
A, the angle between the first pin shaft axis on the first crank connecting link 4 and piston is β.
A kind of power transmission mechanism of method preparation improving engine effective thermal efficiency of the present invention, including gas
Cylinder, cylinder is interior to install piston, and piston is connect by connector with crank connecting link, and crank connecting link is connect by crank axle with crank,
Crank is connect with crankshaft, and crankshaft is two, eccentricity is arranged, eccentricity is crankshaft center line and piston rod and crank connecting link connecting pin
Distance between axis, piston rod and crank connecting link connecting pin be located above crankshaft center point or eccentricity be crankshaft center line and
Distance or eccentricity between smooth block upper pin and crank connecting link connecting pin axis are crankshaft center line and piston and crank connecting link
Distance between the axis of connecting pin, eccentricity are greater than throw of crankshaft, and the angular interval that working stroke crank turns over is less than 180 degree.When
When crankshaft connecting rod system moves, eccentricity is in the center and the movement of crank connecting link connecting shaft of crankshaft center line and smooth block upper pin
The distance of heart line, at a distance from eccentricity can also be crankshaft center line between piston and crank connecting link connecting shaft centre of motion line, partially
The heart away from can also be crankshaft center line between piston rod and crank connecting link connecting shaft centre of motion line at a distance from, piston rod and crank connect
Bar connecting pin is located above crankshaft center point.
The further preferred embodiment of the present invention is: installing piston 2 in cylinder 1, installs smooth block 15, smooth block 15 on piston
The first pin shaft 3 of upper installation and the second pin shaft 14, the first pin shaft 3 are connect with one end of the first crank connecting link 4, the first crank connecting link 4
The other end connect with 7 one end of the first crank by the first crank axle 6,7 other end of the first crank is connect with the first crankshaft 8, the
One crankshaft 8 is connected the first synchromesh gear 5, and eccentric distance e is greater than the radius R of the first crank 7, the second pin shaft 14 and the second crank connecting link
The connection of 13 one end, 13 other end of the second crank connecting link are connect by the second crank axle 11 with 10 one end of the second crank, the second crank
10 other ends are connect with the second crankshaft 9, and the second crankshaft 9 is connected the second synchromesh gear 12, and the first synchromesh gear 5 is synchronous with second
Gear 12 engages, and the first crankshaft 8 rotates clockwise, and the second crankshaft 10 is rotated counterclockwise by connected synchromesh gear.Second is bent
The crankshaft connecting rod system of axis 9 is using 2 centre of motion line of piston as the crankshaft connecting rod system symmetric motion of plane and the first crankshaft 8.
Between 4 connecting pin axis of the axis of first crankshaft 8 and the center of the first pin shaft 3 and the first crank connecting link
Distance is that eccentric distance e is as shown in Figure 1.
The difference of the crank link length L and throw of crankshaft R are 0.75-0.95 except the quotient of eccentric distance e.
The difference of the crank link length L and throw of crankshaft R are 0.6-0.98 except the quotient of eccentric distance e.
The difference of the crank link length L and throw of crankshaft R are 0.75-0.98 except the quotient of eccentric distance e.
The difference of the crank link length L and throw of crankshaft R are 0.6-0.75 except the quotient of eccentric distance e.
Effect in above scheme is explained with table 1 of the present invention, table 2 and table 3, the curve shown in attached drawing 2-6
It further illustrates.In table and biasing mechanism factor sigma shown in figurepzIt is the difference of crank link length L and throw of crankshaft R except inclined
Quotient of the heart away from e.
The structure of the shell of engine power transmission mechanism of the present invention, cylinder, piston, connecting rod, crank and crankshaft
Shaped position relationship is identical as well-known technique.
The crank link length L and the difference of throw of crankshaft R that the present invention is set when preparing engine power transmission mechanism are removed
The quotient of eccentric distance e is biasing mechanism coefficient, and the precondition of setting biasing mechanism coefficient is that eccentricity is greater than throw of crankshaft.Biasing
Mechanism coefficient is 0.6-0.98, preferably 0.60-0.95,0.75-0.98,0.75-0.95 or 0.6-0.75, above-mentioned biasing mechanism
The power of engine double crankshaft connecting rod power output mechanism can be improved in coefficient, and biasing mechanism coefficient range of the present invention is any
Value can improve the power of engine power transmission mechanism, such as: biasing mechanism coefficient be 0.6,0.62,0.65,0.68,
0.70,0.73,0.75,0.78,0.80,0.83,0.85,0.88,0.90,0.93,0.95 or 0.98 etc., wherein when biasing machine
Structure factor sigmapzWhen being set as 0.98, e 7.2cm, R/L 0.22, S 7.55cm, the engine function of double-crankshaft negative bias arrangement
The power of rate transmission mechanism is 1505, and the power of the engine power transmission mechanism of the positive bias arrangement of the prior art is 1282.
Experiment condition such as table 2 is identical, and amendment ratio principle is with table 3, and wherein stroke variation is 1.593, and negative bias output power is
1.174。
Conventional crankshafts are 2R without biasing piston stroke in curve shown in Fig. 2, and piston stroke Se increases after crankshaft biasing, two
It should be converted by scaling up when person's arm of force coefficients comparison, the arm of force coefficient of crankshaft biasing is converted toWork as σpz=0.75
When, using common connecting rod ratioArm of force coefficient curve (the abbreviation negative bias in figure of negative bias double-crankshaft reverse drawing link mechanism
Reverse drawing) and negative bias Double-crank shaft bar linkage arm of force coefficient curve (abbreviation negative bias in figure) and tradition without biasing single axis
Link mechanism arm of force coefficient curve is compared, and arm of force coefficient curve maximum value is higher by 0.18,78 ° away from top dead centre crankshafts when maximum value
Corner, negative bias reverse drawing is almost overlapped with the arm of force coefficient curve of both negative bias at this time, σpz=0.75 be negative bias reverse drawing with
The similar critical point of arm of force coefficient curve of both negative bias.
Conventional crankshafts are 2R without biasing piston stroke in attached curve graph shown in Fig. 3, and piston stroke Se increases after crankshaft biasing
Greatly, it should be converted by scaling up when the two arm of force coefficients comparison, the arm of force coefficient of crankshaft biasing is converted toWork as σpz=
When 0.95, using common connecting rod ratioNegative bias double-crankshaft reverse drawing link mechanism arm of force coefficient curve (in Fig. 3 referred to as:
Negative bias reverse drawing), the arm of force coefficient curve of negative bias Double-crank shaft bar linkage (in Fig. 3 referred to as: negative bias) with tradition without biasing
Single crankshaft connecting rod system arm of force coefficient curve (in Fig. 3 referred to as: without biasing) is compared, and arm of force coefficient curve maximum value is higher by 0.29,
Especially at this time the arm of force coefficient curve maximum value of negative bias reverse drawing when crank angle Forward, move forward to 51 ° away from top dead centre songs
Shaft angle；Conventional crankshafts are 2R without biasing piston stroke in attached drawing 2, attached drawing 3, and piston stroke Se increases after crankshaft biasing, the two
It should be converted by scaling up when arm of force coefficients comparison.
The ratio between attached shaft work value shown in Fig. 4 (is not included in Double-crank shaft bar linkage and reduces friction raising mechanical efficiency part),
Since negative bias reverse drawing, negative bias are different from positive bias working method arm of force coefficient maximum value, negative bias reverse drawing, the negative bias arm of force
The crank shaft angle angle value that coefficient maximum value occurs is different, so that the shaft work of positive bias, negative bias, negative bias reverse drawing working method is successively
It improves, σpz=0.91 negative bias reverse drawing shaft work is 1.16 times or so without biasing working method shaft work.
Attached P-V figure shown in fig. 5, is to use internal combustion engine traditional theory, Engineering Thermodynamics statement is that function is recycled made by piston
Are as follows: wo=∫ PgDv, by the done expansion of piston when engine operation and gas pressure PgCirculation indicated horsepower figure (P-V figure) is drawn,
Engine negative bias working method as seen from the figure, hence it is evident that be higher than positive bias working method.
Claims (9)
1. a kind of method for improving engine effective thermal efficiency, it is characterised in that: the bias of setting engine power transmission mechanism
Away from, eccentricity be crankshaft center line between piston rod and crank connecting link connecting pin axis at a distance from, piston rod is connect with crank connecting link
End is located above crankshaft center point or eccentricity is between crankshaft center line and smooth block upper pin and crank connecting link connecting pin axis
Distance or eccentricity be crankshaft center line between piston and crank connecting link connecting pin axis at a distance from；
Eccentric distance e is set and is greater than throw of crankshaft R；
Two crankshafts are arranged in a manner of negative bias；
The difference of crank link length L and throw of crankshaft R is set except the quotient of eccentric distance e is biasing mechanism coefficient；
Setting biasing mechanism coefficient is 0.60-0.98, provides engine power transmission mechanism with biasing mechanism coefficient；
The raising of engine power transmission mechanism transimission power is completed with crankshaft negative bias arm of force coefficient is increased, negative bias double-crankshaft
Link mechanism arm of force coefficient is ζR, F
In formula: L is crank link length, and R is throw of crankshaft, and e is eccentricity, and α is crankshaft rotation angle.
2. a kind of method for improving engine effective thermal efficiency according to claim 1, it is characterised in that: the biasing
Mechanism coefficient is 0.75-0.98.
3. a kind of method for improving engine effective thermal efficiency according to claim 1, it is characterised in that: the biasing
Mechanism coefficient is 0.60-0.95.
4. a kind of method for improving engine effective thermal efficiency according to claim 1, it is characterised in that: the biasing
Mechanism coefficient is 0.6-0.75.
5. a kind of method for improving engine effective thermal efficiency according to claim 1, it is characterised in that: the biasing
Mechanism coefficient is 0.75-0.95.
6. a kind of power transmission of method preparation for improving engine effective thermal efficiency according to claim 1-5
Mechanism, it is characterised in that: including cylinder, piston is installed in cylinder, piston is connect by connector with crank connecting link, crank connecting link
Connect by crank axle with crank, crank is connect with crankshaft, and crankshaft is two, eccentricity is set, eccentricity be crankshaft center line with
Distance between piston rod and crank connecting link connecting pin axis, piston rod and crank connecting link connecting pin are located above crankshaft center point,
Perhaps eccentricity be crankshaft center line between smooth block upper pin and crank connecting link connecting pin axis at a distance from or eccentricity be bent
Axis axis between piston and crank connecting link connecting pin axis at a distance from, eccentricity is greater than throw of crankshaft, and working stroke crank turns over
Angular interval be less than 180 degree；The difference of crank link length L and throw of crankshaft R is 0.6-0.98 except the quotient of eccentric distance e.
7. a kind of power transmission mechanism of method preparation for improving engine effective thermal efficiency according to claim 6,
It is characterized in that: piston (2) being installed in cylinder (1), install smooth block (15) on piston, smooth block installs the first pin shaft on (15)
(3) connect with the second pin shaft (14), the first pin shaft (3) with one end of the first crank connecting link (4), the first crank connecting link (4) it is another
One end is connect by the first crank axle (6) with the first crank (7) one end, and the first crank (7) other end and the first crankshaft (8) are even
It connects, the first crankshaft (8) is connected the first synchromesh gear (5), the axis of the first crankshaft (8) and the center and first of the first pin shaft (3)
Distance between the axis of crank connecting link (4) connecting pin is eccentric distance e, and eccentric distance e is greater than the radius R of the first crank (7), the second pin shaft
(14) it is connect with the second crank connecting link (13) one end, the second crank connecting link (13) other end passes through the second crank axle (11) and second
The connection of crank (10) one end, the second crank (10) other end are connect with the second crankshaft (9), and the second crankshaft (9) connected second is synchronous
Gear (12), the first synchromesh gear (5) and the second synchromesh gear (12) engagement, the first crankshaft (8) rotate clockwise, the second crankshaft
(10) it is rotated counterclockwise by connected synchromesh gear.
8. a kind of power transmission mechanism of method preparation for improving engine effective thermal efficiency according to claim 6 or 7,
It is characterized by: the difference of crank link length L and throw of crankshaft R is 0.75-0.95 except the quotient of eccentric distance e.
9. a kind of power transmission mechanism of method preparation for improving engine effective thermal efficiency according to claim 6 or 7,
It is characterized by: the difference of crank link length L and throw of crankshaft R is 0.75-0.98 except the quotient of eccentric distance e.
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| CN201810308941.XA CN108518279B (en) | 2017-04-05 | 2018-04-04 | Improve the method for engine effective thermal efficiency and its power transmission mechanism of preparation |
| PCT/CN2019/077661 WO2019192288A1 (en) | 2018-04-04 | 2019-03-11 | Method for improving effective thermal efficiency of engine and power transmission mechanism prepared thereby |
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| CN2017203491428 | 2017-04-05 | ||
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108561225A (en) * | 2017-04-05 | 2018-09-21 | 张佰力 | A kind of power transmission mechanism improving engine effective thermal efficiency method and its preparation |
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| DE112019001068T5 (en) * | 2018-04-04 | 2020-12-03 | Jinan Protech Technology Co., Ltd. | A method of improving the effective thermal efficiency of the engine and a power transmission mechanism made by this method |
| WO2019192288A1 (en) * | 2018-04-04 | 2019-10-10 | 张佰力 | Method for improving effective thermal efficiency of engine and power transmission mechanism prepared thereby |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996028652A1 (en) * | 1995-03-09 | 1996-09-19 | Gheorghe Parciulea | Internal combustion engine with a rearwardly shifted cylinder |
| JP2001207854A (en) * | 2000-01-21 | 2001-08-03 | Mazda Motor Corp | Spark ignition type reciprocating engine |
| CN1421597A (en) * | 2002-09-09 | 2003-06-04 | 苟贤忠 | Multiple-link rod internal combustion engine |
| JP2005344668A (en) * | 2004-06-04 | 2005-12-15 | Toyota Motor Corp | Internal combustion engine |
| CN101144425A (en) * | 2007-10-09 | 2008-03-19 | 浙江大学 | Double connecting bar power output device for engine |
-
2018
- 2018-04-04 CN CN201810308941.XA patent/CN108518279B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996028652A1 (en) * | 1995-03-09 | 1996-09-19 | Gheorghe Parciulea | Internal combustion engine with a rearwardly shifted cylinder |
| JP2001207854A (en) * | 2000-01-21 | 2001-08-03 | Mazda Motor Corp | Spark ignition type reciprocating engine |
| CN1421597A (en) * | 2002-09-09 | 2003-06-04 | 苟贤忠 | Multiple-link rod internal combustion engine |
| JP2005344668A (en) * | 2004-06-04 | 2005-12-15 | Toyota Motor Corp | Internal combustion engine |
| CN101144425A (en) * | 2007-10-09 | 2008-03-19 | 浙江大学 | Double connecting bar power output device for engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108561225A (en) * | 2017-04-05 | 2018-09-21 | 张佰力 | A kind of power transmission mechanism improving engine effective thermal efficiency method and its preparation |
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