CN201137519Y - Differential reciprocating-piston internal-combustion engines - Google Patents

Abstract

The utility model discloses a differential reciprocating piston internal combustion engine, comprising a cylinder, a piston and a crank connecting rod mechanism, wherein the piston comprises a dynamic piston and a reaction piston which are oppositely provided in the cylinder, the crank connecting rod mechanism comprises a dynamic crank connecting rod mechanism and a reaction crank connecting rod mechanism respectively connected with the dynamic piston and the reaction piston, the two crank connecting rod mechanisms are connected with a cooperation device for confirming a constant average value of the working circulation of the differential angle of the two cranks, the dynamic crank connecting rod mechanism is connected with a dynamic crank flywheel. The utility model has high efficiency, low specific oil consumption (g/lw.h), better dynamic performance, large specific torque (N.m/L) and high output per liter (kw/L).

Description

The differential type reciprocating IC engine

(1) technical field

The utility model relates to a kind of internal-combustion engine, and feature is a kind of differential type reciprocating IC engine.

(2) background technique

1, the utility model " internal-combustion engine energy devalue principle " of being based on that the utility model people proposes and initiative.The fundamental equation of this principle is:

() _DIn, effective merit of expression single cylinder, unit piston area, unit crank length internal-combustion engine.

In the formula: E _{X, Q}Be the heat of supplying with in the thermodynamic system;

We is effective merit that internal-combustion engine is done;

Me is the effective torque of internal-combustion engine;

α is crank angle (° CA);

τ is a number of stroke, two-stroke τ=2, four-stroke τ=4;

N is a cycle-index;

Pg is the gas pressure of piston-top surface;

ζ r arm of force coefficient (gyration center is defined as the arm of force to the perpendicular distance of power);

${\mathrm{\&xi;}}_r=\frac{\sin [\mathrm{\&alpha;}+\left(\arccos \sqrt{1-{\mathrm{\&lambda;}}^2{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="Y20072015869200131.png,Y20072015869200171.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&alpha;}}\right)]}{\sqrt{1-{\mathrm{\&lambda;}}^2{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="Y20072015869200131.png,Y20072015869200171.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&alpha;}}}$

λ=r/l (r is a crank throw, and l is a length of connecting rod)

η _mBe mechanical efficiency;

A _{N2, Q}For internal-combustion engine

Once (by Regression).

Character express that should " internal-combustion engine energy devalue principle " by: internal-combustion engine the heat in the confession working medium

E _{X, Q}, in actual thermal procession, changing effective merit We into, the size of this effective merit equals cylinder pressure to the integration of bent axle effective torque Me to crank angle α cyclic process.The size of this effective torque equals the product of this cylinder pressure Pg and its pairing arm of force coefficient ζ r and mechanical efficiency η m, can not be converted into effective merit

Then progressively devalue, and finally deteriorate to Its

Increase A _{N2, Q}Permanent in " 0 ".

Three derived equations and the inference of this fundamental equation are as follows: inference 1: the thermal efficiency of internal-combustion engine and

Efficient all with the long-pending direct ratio that is integrated into of cylinder pressure Pg, arm of force coefficient ζ r, mechanical efficiency η m to cyclic process.Its mathematic(al) representation is

Inference 2: Engine Indicated Mean Pressure is that cylinder pressure Pg and its pairing arm of force coefficient ζ r long-pending is to a cyclic process integration

Its mean effective pressure is cylinder pressure Pg, and its pairing arm of force coefficient ζ r, mechanical efficiency η m is long-pending, to a cyclic process integration

Its mathematic(al) representation is:

In the formula: W _iBe the circulation indicated work.Vs is a displacement.

Inference 3: motor fuel supply and mechanical efficiency one regularly if seek out maximum effective work, should make maximum combustion pressure Pmax (be ζ r, produce in the time of max) in arm of force coefficient maximum.Its mathematic(al) representation is:

Corresponding ζ r, max

Internal-combustion engine after all, is that cylinder pressure Pg does work by piston and the external output torque of connecting rod.As everyone knows, launching on the indicator diagram, combustion in IC engine pressure is " pulse type " and distributes; And cylinder pressure is to the arm of force of crankshaft torque, from the top dead center to the lower dead center, is one and become gradually greatly by " 0 ", gets back to the process of " 0 " more gradually, is similar to sinusoidal curve.This is the curve of arm of force coefficient ζ r just.In other words, piston is near top dead center, and cylinder combustion pressure is very big, and the arm of force tangential force of crank (perhaps to) is but very little, so at this moment the moment of torsion that sends of motor is very little; When the arm of force became big gradually, gaseous-pressure but quickly diminished, so its moment is still very little.Output that this has just influenced engine torque and power greatly causes working medium

Can not be converted into mechanical work as early as possible as soon as possible, cause working medium

The a large amount of devaluation, and finally deteriorate to For good and all lose the acting ability, caused the energy greatly to waste.

2, internal-combustion engine was invented since 103 more than ten years, and its performance has had progressive considerablely.But, the present internal-combustion engine that uses, no matter be reciprocating type, or the three-apexed rotor formula, its thermal efficiency is still lower, and power character is also not too high; And, under existing design concept instructs, rethink and make a breakthrough, become more and more difficult.The utility model proposes to finish under " thermomechanics-Mechanics of Machinery design principle " guidance the utility model people." the internal-combustion engine energy devaluation principle " fundamental equation of being drawn record by the top it has been seen in that: it has forgiven the first law of thermodynamics, the second law of thermodynamics and Mechanics of Machinery principle (for example parameter ζ r).

3, the internal-combustion engine that uses in the world now, the motorcar engine that particularly has a large capacity and a wide range is for improving its performance, structure becomes and becomes increasingly complex, general 4 valves of every cylinder, two camshafts of every motor, become lift, covert position has increased cost of production greatly in addition.

4, world oil supply conditions day is becoming tight, and price climbs up and up.Energy saving becomes one of emphasis problem of internal-combustion engine industry; It also is numerous automobile consumers' expectation.

Therefore, the manufacturer and the consumer group, all press for a kind of with oil economize, specific power is big, simple in structure, production and the low internal combustion engine of user cost.

(3) summary of the invention

The technical problems to be solved in the utility model is: provide a kind of specific fuel consumption (g/kw.h) low, the differential type reciprocating IC engine that specific power (kw/L) is big.

In order to solve the problems of the technologies described above, the utility model comprises cylinder block, piston, connecting rod, described piston comprises that subtend is located at power piston and the counter-force piston in the cylinder block, connecting rod comprises respectively power crank linkage mechanism and the counter-force connecting rod that is connected with the counter-force piston with power piston, two connecting rods are connected with the constant cooperating agency of work cycle mean value at the differential angle that can keep two cranks, and the power crank linkage mechanism is connected with the power crankshaft flywheel.

In order to improve the degree of constant volume of firing chamber, described cooperating agency comprises two special shape gears, and two special shape gears are fixedly connected with power crankshaft and counter-force bent axle respectively, and two special shape gears are meshed or pass through the intermediate gear transmission.

In order to improve the degree of constant volume of firing chamber, described special shape gear is oval gear or blade-shaped gear.

For simple in structure, described cooperating agency is for coordinating bar, coordinates the bearing of bar by two ends and is fixed in the support arm of power crankshaft with the counter-force bent axle and is connected.

In order to obtain fuel availability preferably, described differential angle is in the scope of 35 ° of CA-75 ° of CA.

For improving the internal combustion engine quality, described counter-force connecting rod is connected with the counter-force crankshaft-flywheel.

The beneficial effects of the utility model are that the utility model and traditional combustion engine relatively mainly contain following characteristics:

1,

The efficient height, (g/lw.h) is low for specific fuel consumption, economizes with oil.

2, good dynamic property, bigger than moment of torsion (N.m/L), power per liter (kw/L) height.

3, two-piston relative movement in every cylinder easily forms strong working medium turbulent flow, helps burning and the raising of compression ratio.

4, because after the counter-force piston arrives top dead center, two-piston is motion round about simultaneously, compare with traditional combustion engine, this just equals speed of related movement has increased more than one times, and this helps suppressing detonation, helps the raising of compression ratio.If adopt the SI-HCCI-SI combustion system, then help widening the HCCI operating range.

5, in the gas exchange process, there is not pumping loss basically, the friction loss of apneustic mechanism, mechanical efficiency height.

6, simple in structure, (kg/kw) is little for specific mass, and cost of production and user cost are low.

Though need pressurized machine, in four stroke engine, also be widely adopted.

(4) description of drawings

Fig. 1 is the structural representation of the utility model specific embodiment one; Fig. 2 is cooperating agency's schematic representation of Fig. 1; Fig. 3 is the plan view of Fig. 2; Fig. 4 is the A-A cutaway view Amplified image of Fig. 3; Fig. 5 is the intake manifold cutaway view Amplified image of Fig. 1; Fig. 6 is arm of force coefficient curve figure of the present utility model; Fig. 7 is the structural representation of the utility model specific embodiment two; Fig. 8 is the structural representation of the utility model specific embodiment three;

Among the figure: 1, power piston, 2, spark plug, 3, gasoline ejector, 4, the counter-force piston, 5, counter-force case scavenging air pipe, 6, the counter-force connecting rod, 7, counter-force case suction tude, 8, the counter-force crankshaft-flywheel, 9, scavenging port, 10, the power box scavenging air pipe, 11, relief opening, 12, block jacket, 13, cylinder block, 14, the power crankshaft flywheel, 15, cooperating agency, 16, the power crank linkage mechanism, 17, closure, 18, suction tude, 19, air-strainer, 20, gas exhaust manifold, 21, coordinate bar, 22, support arm, 23, cylinder sleeve, 24, tangential scavenging port, 25, intake manifold, 26, intercooler, 27, throttle valve, 28, A idling closure, 29, the little load closure of B, 30, the closure of loading among the C, 31, the big load closure of D, 32, crankcase, 33, intake manifold, 34, the exhaust after-treatment device, 35, exhaust-gas turbocharger, 36, modulating valve, 37, Roots type supercharger, 38, mixing chamber, 39, the EGR valve, 40, the pre-catalyst converter of EGR, 41, cooler for recycled exhaust gas, 42, co-rail oil injection system.

(5) embodiment

Specific embodiment one

A kind of specific embodiment as shown in Figure 1, it is a miniature gasoline engine, comprises power piston 1, spark plug 2, gasoline ejector 3, counter-force piston 4, counter-force case scavenging air pipe 5, counter-force connecting rod 6, counter-force case suction tude 7, counter-force crankshaft-flywheel 8, scavenging port 9, power box scavenging air pipe 10, relief opening 11, block jacket 12, cylinder block 13, power crankshaft flywheel 14, cooperating agency 15, power crank linkage mechanism 16, closure 17, suction tude 18, air-strainer 19, gas exhaust manifold 20, two crank boxs 32.

Two crank boxs 32 lay respectively at the two ends of cylinder block 13, counter-force connecting rod 6 and power crank linkage mechanism 16 are separately positioned in two crankcases 32, power piston 1 and counter-force piston 4 are located at respectively in the cylinder block 13, counter-force connecting rod 6 connects counter-force piston 4 and counter-force crankshaft-flywheel 8 respectively, and power crank linkage mechanism 16 connects power piston 1 and power crankshaft flywheel 14 respectively.

Cooperating agency 15 as shown in Figure 2, it adopts a hollow coordination bar 21 (its cross section as shown in Figure 4), the two ends of coordinating bar 21 are connected with two support arms 22 by bearing respectively, two support arms 22 are fixed with the bent axle of counter-force connecting rod 6 and power crank linkage mechanism 16 respectively, coordinating bar is one of cooperating agency, and its material and structure should be in light weight except that enough rigidity and intensity should be arranged, rotational resistance is little, and vibration and noise are low.During installation, must guarantee the size at the differential angle (C α) of two cranks.

Intake manifold structural representation as shown in Figure 5, the suction port of intake manifold 25 is provided with intercooler 26, in be provided with throttle valve 27 and four closures, four closures are to have 24, four closures of a plurality of tangential scavenging ports to be communicated with several tangential scavenging ports 24 respectively on the cylinder sleeve 23 of load closure 30, the big load closure 31 of D, cylinder block 13 among A idling closure 28, the little load closure 29 of B, the C.Its main feature is the suction tude that air inlet has been divided into four big small bores of difference, when idling and warming-up, closure A all can be opened, and when all the other 3 suction tude Close Alls, little load, can only open the B closure, only opens C during middle load, opens D when loading greatly.9 one-tenth tangential admissions of scavenging port easily form eddy flow.

The air of power crankshaft case and counter-force crankcase enters scavenging port 9 by counter-force case scavenging air pipe 5 and power box scavenging air pipe 10 respectively.Two-piston shown in Figure 1 position is: counter-force piston 4 is at top dead center, and power piston 1 is in design position, differential angle.

Specific embodiment two

A kind of specific embodiment as shown in Figure 7, it is a kind of straight spray combined supercharging gasoline engine, comprises power piston 1, spark plug 2, gasoline ejector 3, counter-force piston 4, counter-force connecting rod 6, counter-force crankshaft-flywheel 8, scavenging port 9, relief opening 11, cylinder block 13, power crankshaft flywheel 14, cooperating agency 15, power crank linkage mechanism 16, closure 17, air-strainer 19, gas exhaust manifold 20, two crankcases, 32 intake manifold 33, exhaust after-treatment device 34, exhaust-gas turbocharger 35, modulating valve 36, Roots type supercharger 37.

Two crankcases 32 lay respectively at the two ends of cylinder block 13, counter-force connecting rod 6 and power crank linkage mechanism 16 are separately positioned in two crankcases 32, power piston 1 and counter-force piston 4 are located at respectively in the cylinder block 13, counter-force connecting rod 6 connects counter-force piston 4 and counter-force crankshaft-flywheel 8 respectively, and power crank linkage mechanism 16 connects power piston 1 and power crankshaft flywheel 14 respectively.

This specific embodiment can adopt the cooperating agency 15 identical with embodiment one, also can adopt the special shape gear system, for example oval gear, blade-shaped gear etc.Two special shape gears that match are fixedly connected with power crankshaft and counter-force bent axle respectively between flywheel and cylinder body, and it installs principle is to reduce near the movement velocity of counter-force piston top dead center, and must guarantee the size at differential angle (C α).Between two special shape gears intermediate gear can be set.Exhaust-gas turbocharger 35, modulating valve 36, Roots type supercharger 37.

Position shown in Figure 7 is: counter-force piston 4 is at top dead center, and power piston 1 is in the position, differential angle of design.Relief opening 11 is in power piston 1 side, and scavenging port 9 is in counter-force piston 4 sides.Adopt engine driven supercharging (Roots) and the scavenging of exhaust gas turbocharge dual mode, Roots type supercharger 37 is with automatic clutches, can guarantee the moment of torsion of requirement when starting and needing, and the hysteresis of compensation exhaust-gas turbocharger 35.

Specific embodiment three

A kind of specific embodiment as shown in Figure 8, it is a kind of combined supercharging rail direct injection diesel engine altogether, comprises power piston 1, counter-force piston 4, counter-force connecting rod 6, counter-force crankshaft-flywheel 8, scavenging port 9, relief opening 11, cylinder block 13, power crankshaft flywheel 14, cooperating agency 15, power crank linkage mechanism 16, closure 17, air-strainer 19, gas exhaust manifold 20, crankcase 32, intake manifold 33, exhaust after-treatment device 34, exhaust-gas turbocharger 35, modulating valve 36, Roots type supercharger 37, mixing chamber 38, EGR valve 39, the pre-catalyst converter 40 of EGR, cooler for recycled exhaust gas 41, co-rail oil injection system 42.

This internal combustion (IC) engine airframe is the wide-angle V-type, be provided with a power piston 1 and a counter-force piston 4 in each cylinder barrel, the centre of V-type and two ends are provided with crankcase 32, in the middle crankcase 32 power crank linkage mechanism 16 is set, it connects two power pistons 1 and a power crankshaft flywheel 14, in the crankcase 32 of two outer ends counter-force connecting rod 6 is set, connect a counter-force piston 4 and a counter-force crankshaft-flywheel 8 respectively, this internal-combustion engine has adopted egr system, and pre-catalyst converter and cooler for recycled exhaust gas are arranged.Engine driven supercharging and exhaust gas turbocharge combined system have been adopted.

This specific embodiment can adopt the cooperating agency 15 identical with embodiment one, also can adopt the special shape gear system, for example oval gear, blade-shaped gear etc.Two special shape gears that match are fixedly connected with power crankshaft and counter-force bent axle respectively between flywheel and cylinder body, and it installs principle is to reduce near the movement velocity of counter-force piston top dead center, and must guarantee the size at differential angle (C α).Between two special shape gears intermediate gear can be set.Exhaust-gas turbocharger 35, modulating valve 36, Roots type supercharger 37.

EGR gas shown in Figure 8 is drawn before exhaust-gas turbocharger 35, but draws after being preferably in exhaust-gas turbocharger 35, utilizes low pressure exhaust gas.

Arm of force coefficient curve as shown in Figure 6.For internal-combustion engines crank-connecting rod mechanism, arm of force system equation is:

${\mathrm{\&xi;}}_r=\frac{\sin [\mathrm{\&alpha;}+\left(\arccos \sqrt{1-{\mathrm{\&lambda;}}^2{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="Y20072015869200131.png,Y20072015869200171.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&alpha;}}\right)]}{\sqrt{1-{\mathrm{\&lambda;}}^2{\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="Y20072015869200131.png,Y20072015869200171.png"\; state="\{\{state\}\}">sin</figure-callout>}}^2\mathrm{\&alpha;}}}$

Its maximum value is about 1.045, occur in 75 ° of CA (when $\mathrm{\&lambda;}=\frac{1}{3.5}$ The time).

The power transmission mechanism form difference of internal-combustion engine, its arm of force coefficient equation is also different.

The utility model can be used for the multiple traffic tool and engineering machinery and farm machinery such as automobile.It can adopt multiple liquid fuel and gaseous fuel, the fuel fast to velocity of combustion, and for example hydrogen etc. is particularly suitable.Its differential angle is preferably between 35 ° of CA to 75 ° of CA and chooses, and this moment, corresponding ζ r value was between 0.710 to 1.045.

Principle of the present utility model is to utilize the traditional combustion engine mature technology as far as possible, to strengthen inheritance, is convenient to tissue production, puts on market as early as possible.For this reason, the utility model has mainly been taked following technical measures on the traditional combustion engine basis.

1, removed the cylinder head of traditional combustion engine, replaced with a conventional piston.For sake of convenience, be referred to as the counter-force piston.

2, redesign cylinder block.The cylinder body two ends are put a power crank linkage mechanism and a counter-force connecting rod respectively.Promptly, in a cylinder barrel, by the differential angle of certain crank (C α), subtend is by adorning two piston-power pistons and counter-force piston, and the opposing torque that the counter-force piston is produced, forward ground increases the output torque and the output power of power crankshaft by the cooperating agency between two bent axles.

Two connecting rods of same motor, (λ=r/l) and stroke S value can be identical, also can be inequality than the λ value for its connecting rod.

Its differential angle can define like this: when the top dead center position of counter-force piston arrives (being in) compression stroke, power piston arrives the crank angle (being the crank angle that power piston leaves compression stroke top dead center) that atdc continues to run until this moment (being the moment of counter-force piston arrives top dead center) present position again.Symbol is Cd; Unit is a ° CA.

3, remove the camshaft valve mechanism of traditional combustion engine, its scavenge duct is replaced by pore, and is controlled by piston.Cylinder one end has exhaust port (generally in the power piston side), and the other end has scavenging port.So the utility model belongs to a kind of uniflow scavenged two stroke IC engine.But, the essence difference of key of the present utility model and all internal-combustion engines of the world is: when the counter-force piston is in top dead center position, power piston be in the design position, differential angle, arm of force coefficient be in corresponding higher value (for example: during differential angle Cd=50 ° of CA, arm of force coefficient ζ r=0.910; During Cd=60 ° of CA, arm of force coefficient ζ r=0.994).At this moment, fuel combustion, cylinder pressure reaches or near maximum value, power crankshaft is sent Maximum Torque; Though the arm of force coefficient of counter-force piston is little, the opposing torque that it produced, also by cooperating agency, positive acting is in pto.So working medium

Obtain utilizing more fully,

Reduce to greatest extent.

Cyclic process of the present utility model is as follows: 1 combustion expansion process---and the counter-force piston is about to arrive the compression process top dead center, when power piston is about to arrive design position, differential angle (C α), fuel sprays into, fire burns, expansion working, 2 free exhaust processes---in the later stage of expanding, descending power piston begins free exhaust at first with Exhaust Open; 3 scavenging processes---then, descending counter-force piston is opened scavenging port, and ambient air enters internal-combustion engine through crankcase or gas compressor, the beginning scavenging.At this moment, row, scavenging port are all in the enable possition, and the waste gas of discharge directly or through waste vapour turbine and preprocessor enters atmosphere; 4 post-aerations---then, power is up through lower dead center while still alive, and with exhaust close, at this moment, scavenging port utilizes air-flow inertia and supercharger pressure to continue inflation still in the enable possition, to increase aeration quantity; 5 compression processes: up counter-force piston is closed scavenging port, and continues up; At this moment, up power piston arrival atdc is transferred descending, finally realizes compression process.

Miniature gasoline engine can be directly by crankcase scavenging, and medium-and-large-sized internal-combustion engine should be provided with scavenging pump (gas compressor).

4, the cooperating agency between power crank linkage mechanism and the counter-force connecting rod can be an ordinary gear, also can be special shape gear (for example oval gear, blade-shaped gear etc.), can also be linkage rod (coordination bar).

When adopting gear train, two gears should be fixedly mounted on respectively on the power crankshaft and counter-force bent axle between cylinder block and the flywheel.Between two gears, one or several intermediate gears can be set, and with whole gears be sealed in can the gear-box of proper lubrication in.When adopting special shape gear, it installs principle should make near counter-force piston speed top dead center slow down, to improve the degree of constant volume of firing chamber.

For the large combustion machine, its cooperating agency can be made of the drive link of the bevel gear that is fixed in two crankshaft ends and the band that is mated controlling device etc.

No matter adopt which kind of cooperating agency, all must be when design and installation, the differential angle of strict guarantee (Cd) specified value.

5, for reducing wearing and tearing to cylinder wall, bent axle can with cylinder offset, (λ=r/l) is to reduce the side pressure of piston to casing wall also can to select less λ value for use.

6, power output can also can be exported by the intermediate gear of cooperating agency as required directly by power crankshaft output.When exporting, can play reduction of speed or raising speed effect by intermediate gear.

7, power crankshaft can design conventional flywheel.The counter-force bent axle can design flywheel as required, and is changeable, not essential, even gear that can double as cooperating agency.

8, the spread pattern of cylinder block can design as required.Can be single cylinder engine, also can be through being multi-cylinder engine.Can horizontal arrangement, also can tilting or vertically-arranged.When the power crankshaft both sides all are provided with the counter-force bent axle, can also be arranged as V-type or star-like.When being star-like, preferably adopt articulated connecting rod.

9, the ventilation of cylinder can be adopted crankcase scavenging, also can be through adopting pressurized machine (scavenging pump) ventilation.The pattern of pressurized machine can be engine driven supercharging, also can be exhaust gas turbocharge, the electric power supercharging, and complex supercharge or other forms of pressurized machine also can be their combinations.

10, because oil sprayer and spark plug are to place the cylinder middle part basically, thereby the shape of piston head will cooperate the characteristic and the requirement of oil sprayer, is beneficial to the carrying out of combustion process.

11, can adopt different types of fuel such as gasoline, diesel oil, ethers, alcohols, rock gas, hydrogen.Preferably adopt gasoline direct, or the straight spray of other fuel.

Claims (5)

1. differential type reciprocating IC engine, comprise cylinder block (13), piston, connecting rod, it is characterized in that: described piston comprises that subtend is located at power piston (1) and the counter-force piston (4) in the cylinder block (13), connecting rod comprises respectively power crank linkage mechanism (16) and the counter-force connecting rod (6) that is connected with counter-force piston (4) with power piston (1), two connecting rods are connected with the constant cooperating agency (15) of work cycle mean value at the differential angle that can keep two cranks, and power crank linkage mechanism (16) is connected with power crankshaft flywheel (14).

2. differential type reciprocating IC engine according to claim 1, it is characterized in that: described cooperating agency (15) comprises two special shape gears, two special shape gears are fixedly connected with power crankshaft and counter-force bent axle respectively, and two special shape gears are meshed or pass through the intermediate gear transmission.

3. differential type reciprocating IC engine according to claim 2 is characterized in that: described special shape gear is oval gear or blade-shaped gear.

4. differential type reciprocating IC engine according to claim 1 is characterized in that: described cooperating agency (15) is for coordinating bar (21), coordinates the bearing of bar (21) by two ends and is fixed in the support arm (22) of power crankshaft with the counter-force bent axle and is connected.

5. according to any one described differential type reciprocating IC engine among the claim 1-4, it is characterized in that: described differential angle is in the scope of 35 ° of CA-75 ° of CA.

Images