CN2703127Y - Double-piston virual five-stroke internal combustion engine - Google Patents

Abstract

The utility model provides a double-piston virtual five-stroke internal combustion engine. An auxiliary piston is provided above a main piston in a cylinder body, and a sparking plug is arranged on the cylinder wall of a corresponding combustion chamber and/ or the bottom surface of the auxiliary piston of the corresponding combustion chamber; the cylinder wall of the corresponding combustion chamber is provided with at least two groups of air valves, and the auxiliary piston is connected with a resetting piece which enables the auxiliary piston to move far away from the main piston; two compression springs are sheathed on two guide posts which are fixedly connected to the cylinder body, and the shaft of the cam is arranged on a bracket which is fixedly connected to the cylinder body; the shaft of the cam is provided with a crank shaft which bends outwards, the cam keeps the contact with the top surface of the auxiliary piston, and the shaft of the cam is connected with the crank shaft by a driving member. The double-piston virtual five-stroke internal combustion engine adds a virtual pressure-maintaining stroke, and the internal pressure and the temperature of the cylinder after the piston passes through a top dead centre to keep substantial agreement in short time when the piston moves to the top dead centre; when the piston moves to the separation angle which is optimum for the output of the work formed by the connecting rod and the crank shaft, the fuel is ignited and does work, and the suction stroke is shortened.

Description

Virtual five stroke IC engines of double-piston

Technical field

The utility model belongs to field of internal combustion engine.

Background technique

Land transportation and the employed engine of navigation apparatus in the world at present; Nearly all be the internal-combustion engine of four-stroke and two strokes, and be main flow with the four-stroke.

Quartastroke engine in a work cycle, two weeks of crankshaft rotating, piston up and down each twice, four strokes of passing by are example with the petrol engine, these four strokes are respectively:

(1). aspirating stroke, piston move from top to bottom, and piston top volume increases, at this moment, and IO Intake Valve Opens, exhaust valve closing, inflammable mixture is inhaled into cylinder.Intake stroke finishes, IC Intake Valve Closes.

(2). compression stroke, this moment, inlet and exhaust valve was all closed, and bent axle continues rotation, and piston moves from bottom to top.Inflammable mixture in the cylinder is compressed in the firing chamber of piston head and cylinder head formation, and when compression stroke nearly finished, spark plug was emitted spark, and inflammable mixture is lighted.

(3). power stroke, when mixed gas began to light, in-cylinder pressure and temperature reached the highest, and this moment, inlet and exhaust valve was still closed, and combustion-gas pressure acts on piston head, promotes descent of piston, and passes to bent axle by connecting rod, makes crankshaft rotating, externally output torque.

(4). exhaust stroke, piston moves from bottom to top.Exhauxt valve opens this moment, intake valve is still closed.Waste gas after burning is discharged from outside the cylinder under the driveing of residual pressure and piston stroking upward; Exhaust stroke finishes, and next work cycle is prepared in exhaust valve closing.

Two stroke IC engine is in a work cycle, one week of crankshaft rotating (360 degree), two strokes of piston operation (upper and lower each once), compare with quartastroke engine, two stroke IC engine is apneustic, relies on piston to run on diverse location in the cylinder and gets out of the way respectively or block that inlet and outlet are realized in the inlet and outlet hole and the process of taking a breath.

Existing quartastroke engine and two-stroke internal-combustion engine because of its work cycle characteristics, have following defective when work:

1. the work done detonation timing of internal-combustion engine (being the moment of plug ignition), generally all being selected in piston walks to about top dead center precontract 10 degree angles, the inflammable mixture energy discharges maximum after the detonation, but the connecting rod and the bent axle arm of force are almost in line at this moment, useful moment is zero no better than, this moment is very unfavorable to the output work done, can only use the portion of energy of inflammable mixture;

2. on structure, the output power of internal-combustion engine is directly proportional with discharge capacity, and discharge capacity one regularly, and the useful area of piston and the arm of force of bent axle are inversely proportional to, because its all-round excellent product always is slightly less than discharge capacity half.Its all-round excellent product is increased, and our way of employing is an increasing compression ratio at present.Say in some sense, compression ratio of internal-combustion engine is big more, the efficient of machine is high more, as the diesel engine compression ratio greater than petrol engine, Efficiency of Diesel Engine just is higher than petrol engine, the same big Efficiency of Diesel Engine of compression ratio is higher than the little diesel engine of compression ratio, so we can understand like this: the efficient of internal-combustion engine becomes the forward ratio with piston effective area with the product of the bent axle arm of force.The product of this two number of present internal-combustion engine is less than 1/2 machine discharge capacity.Employed fuel economizer on some machine can only reduce machine waste in use micro-ly now, wants really to reduce oil consumption, has only from changing existing Structure of Internal-Combustion Engine and starts with, and the efficiency of internal combustion engine is the highest to be no more than 40% owing to have now, has the potential to be tapped.

Summary of the invention

A purpose of the present utility model is in order to solve the 1st deficiency of above-mentioned existing internal-combustion engine, provide a kind of double-piston virtual five stroke IC engines, it is for existing quartastroke engine, increased a virtual pressurize stroke, allow piston in short-term, keep walking to the top dead center basically identical with piston through pressure and temperature in the atdc cylinder, treat that piston walks to connecting rod and bent axle angle to the output of merit when the most favourable and fuel oil is lighted work done, and it is adjustable arbitrarily that program on fire is become.

Another purpose of the present utility model is in order to solve the 2nd deficiency of above-mentioned existing internal-combustion engine, provide a kind of double-piston virtual five stroke IC engines, used virtual stroke to reach pressurize, suction stroke is shortened, under the prerequisite that does not change discharge capacity, increase the ability of piston absorption fuel oil energy, improved conversion efficiency.

The purpose of this utility model is achieved in that virtual five stroke IC engines of a kind of double-piston, the main piston of work done is housed in its cylinder, the main piston articulated linkage, the rod hinge connection bent axle, bent axle connects flywheel, sub-piston is equipped with in the top of main piston in the described cylinder block, space between this main piston and the sub-piston constitutes the firing chamber, spark plug is arranged on the cylinder wall of respective combustion chamber and/or the bottom surface of the sub-piston of respective combustion chamber, the cylinder wall of respective combustion chamber is provided with at least two group valves, main, in the annular groove outside of sub-piston seal ring is housed, sub-piston is connected with and makes sub-piston make the return unit that moves away from the main piston direction, and this return unit is pressure spring and synchronous cam; Two pressure springs are set on two directional posts that are fixed in cylinder block; The axle of described cam is contained in the support that is fixed in cylinder block, the axle of this cam has the bent axle of outside bending, selling exerts pressure keeps often contacting with the end face of sub-piston the convex surface of this cam by hanging, this cam and described bent axle keep following kinematic relation: the flywheel run-in synchronism on cam and the bent axle, the period of rotation of cam is consistent with the period of rotation of bent axle, the maximum radius of cam equates that with the bent axle effective radius this camshaft is connected in bent axle with driving component.

The convex surface of described cam is sold the maintenance of exerting pressure by extension: the convex surface of this cam has outer convex ring edge, this ring limit inner edge and extension pin contacts, and this extension is sold and is fixed in key seat, and this key seat is fixed in the end face of sub-piston.

Described cam convex surface is sold the maintenance of exerting pressure by extension: the side of cam has the evagination extension to sell, and this extension is sold the chute that stretches into guide rail, and this guide rail is installed in the end face of sub-piston.

The gabarit of described cam is by the arc of a semicircular and one group of shape that parabola shaped amalgamation constitutes.The gabarit of described cam is the shape that circular arc asymptote group is surrounded.The ignition advance angle of described cam equates with the ignition advance angle of bent axle.

Being configured to of valve on the described cylinder wall: slot is arranged in the valve port, there is protruding bank this slot bottom surface and both sides, there is a groove chamber valve port top, the indoor plate that is equipped with of this groove, this plate edge fluted with slot in protruding bank corresponding and can insert valve port is sealed, this plate top connects a pull bar, what this pull bar passed groove chamber top has a tip circle hole, and from circular hole end face aperture, pass, the affixed pressing plate in its top, between this pressing plate bottom surface and the cylinder block end face valve cam is housed, this camshaft supporting is in the cylinder block end face, the part of this pull bar in circular hole is set with a pressure spring, and this spring-loaded is between circular hole bottom surface and pull bar crossed strip seat, and the position of this crossed strip seat and plate are corresponding with the position of valve port sealing.

The utility model has following actively useful effect:

The utility model cylinder of internal-combustion engine, adopt one with cylinder of internal-combustion engine in existing work doing pistons corresponding, its periodically to-and-fro motion of do of cam guidance by semicircle cam or semicircular, be referred to as the apparatus of sub-piston, finish the pressurize stroke, reach the purpose that changes ignition procedure, thereby fundamentally changed the externally power factor of output of internal-combustion engine.We can arbitrarily adjust the ignition timing point by changing the α angle of cam simultaneously, and simultaneously, the shape that changes cam can be produced the motor that different rotating speeds requires.Here the period of rotation of cam and bent axle are in full accord.The maximum radius of cam equates with the bent axle effective radius, and what connect cam set is not a straight-bar, but an assembly parts of protruding regular curvature of picture.

The utility model is owing to used virtual stroke to finish pressurize, and then it is adjustable arbitrarily that ignition procedure is become, and the energy that piston is obtained is absorbed by bent axle to greatest extent, makes the more present internal-combustion engine of machine output power that clearly raising be arranged.Because suction stroke is not the top dead center from piston, but from begin midway, if we are not when changing the bent axle arm of force so, reach discharge capacity with the internal-combustion engine of former identical bent axle, we must realize with the area and the cylinder diameter that increase piston, we have used the internal-combustion engine after the present technique so, the product of its piston effective area and the bent axle arm of force will be above 1/2 times of machine discharge capacity and near total displacement, thereby make 2nd change that obtain jump of front in discussing, and the output power of having used the machine after the present technique has greatly improved than the power of the machine that does not use present technique.We do not need too big power in actual use, thus we can reduce the discharge capacity of selected machine and reach identical effect, thereby realize fuel-economizing.

Description of drawings:

Fig. 1 is a major and minor structure of piston schematic representation in the utility model cylinder;

Fig. 2 is the side-looking structural representation of Fig. 1;

Fig. 3 is the structural representation of sub-piston among Fig. 1;

Fig. 4 is the structural representation of sub-piston return unit spring and cam;

Fig. 5 is the A-A partial sectional view of Fig. 2, shows that valve is in opening state;

The same Fig. 5 of Fig. 6 shows that valve is in closed condition;

The same Fig. 1 of Fig. 7 shows spark-plug location;

Fig. 8 is a suction stroke cylinder schematic representation of the present utility model;

Fig. 9 is a compression stroke cylinder schematic representation of the present utility model;

Figure 10 is a pressurize stroke cylinder schematic representation of the present utility model;

Figure 11 is a power stroke cylinder schematic representation of the present utility model;

Figure 12 is an exhaust stroke cylinder schematic representation of the present utility model;

Figure 13 is an embodiment's of the utility model internal-combustion engine a schematic diagram;

Figure 14 is another embodiment's of the utility model internal-combustion engine a schematic diagram;

Figure 15 is the embodiment that cam of the present utility model is hung pin structure;

Figure 16 is composite structure one embodiment's of adjacent two cylinder cams a schematic representation.

Embodiment

Accompanying drawing number:

1. 2. main piston of cylinder (cylinder block)

3. sub-piston 301. top wing plates

4. firing chamber 5. spark plugs, 6. valves (valve port)

601. slot 602. protruding banks groove chambers 603.

604. plate 605. pull bars 606. have the tip circle hole

607. pressing plate 608. valve cams 609. springs

610. crossed strip seat 611. camshaft holders 612. grooves

7. seal ring 8. Returnning springs 9. directional posts

10. (valve) cam

101. camshaft 102. outer convex ring edges 103. are hung pin

104. key seat 105. bent axles

11. support 12. connecting rods 13. bent axles

14. flywheel 15. cranks

16. guide rail 161. chutes

Please refer to Fig. 1 to Fig. 7, the utility model is virtual five stroke IC engines of a kind of double-piston, the main piston 2 of work done is housed in its cylinder 1, main piston articulated linkage 12, rod hinge connection bent axle 13, bent axle connects flywheel 14, sub-piston 3 is equipped with in the top of main piston 2 in the described cylinder 1, space between this main piston 2 and the sub-piston 3 constitutes firing chamber 4 and sees Fig. 1, spark plug 5 is arranged on the cylinder wall of respective combustion chamber 4 and/or Fig. 7 is seen in the bottom surface of the sub-piston 2 of respective combustion chamber, the cylinder wall of respective combustion chamber 4 is provided with valve 6 and sees Fig. 2, main, sub-piston 2, seal ring 7 is housed in 3 the annular groove outside, sub-piston 3 is connected with and makes sub-piston make return unit away from the motion of main piston direction, and this return unit is pressure spring 8 and the synchronous cam 10 that resets; Two pressure springs 8 are set on two directional posts 9 that are fixed in cylinder block, and this directional post 9 can be that an end is fixed in the cylinder end face, and in addition end stretches out in the wing plate 301 at sub-piston 3 tops and sees Fig. 1; This directional post 9 also can be that wing plate 301 is fixed in the upper end, and the lower end is stretched into the circular hole of cylinder relevant position and seen Figure 13.

The axle 101 of described cam 10 is contained in the support 11 that is fixed in cylinder block sees Fig. 2, the axle 10 of this cam has the bent axle 105 of outside bending, selling exerts pressure keeps contacting with the end face 301 of sub-piston 5 convex surface of this cam 10 by hanging, this cam 10 keeps following kinematic relation to see Fig. 8 to Figure 12 with described bent axle 13: flywheel 14 run-in synchronisms on cam 10 and the bent axle 13, the period of rotation of cam 10 is consistent with the period of rotation of bent axle 13, the maximum radius of cam 10 equates with bent axle 13 effective radiuses, this camshaft 101 is connected in bent axle 13 with driving component, (described driving component is prior art, for example gear, chain-driven, the band transmission, connecting rod transmission etc.).Promote piston 1 at connecting rod and arrive top dead center position, cam 10 rotates to the position of complete release plunger.Periodically push downwards during this cam rotation and discharge sub-piston, sub-piston does reciprocating linear motion at the acting in conjunction lower edge of described return unit and eccentric part cylinder wall.

Please refer to Fig. 4, the convex surface of described cam 10 is sold the maintenance of exerting pressure by extension: the convex surface of this cam 10 has outer convex ring edge 102, this ring limit inner edge and extension pin contacts, this extension pin 103 is fixed in key seat 104, and this key seat is fixed in the end face of sub-piston 3.

Please refer to Figure 15, described cam 10 convex surfaces are sold the maintenance of exerting pressure by extension and with sub-piston end face 301 normal contacting structure are: the side of cam 10 has the evagination extension to sell 103, and this extension is sold the chute that stretches into guide rail 16, and this guide rail 16 is installed in the end face 301 of sub-piston 3.

During enforcement, the gabarit of described cam 10 can be the shape that is made of the arc of a semicircular and one group of parabola shaped amalgamation and see Figure 13.

The gabarit of described cam 10 can be seen Figure 14 for the shape that circular arc asymptote group is surrounded.

The ignition advance angle α 1 of described cam 10 equates with the ignition advance angle α 2 of bent axle 13, sees Figure 13.

Please refer to Fig. 2, Fig. 5, Fig. 6, being configured to of valve 6 on described cylinder 1 wall: slot 601 is arranged in the valve port 6, there is protruding bank 602 this slot bottom surface and both sides, there is a groove chamber 603 the valve port top, in this groove chamber 603 plate 604 is housed, protruding bank 602 in this plate 604 edges fluted 612 and the slot 601 is corresponding and can insert valve port is sealed, these plate 604 tops connect a pull bar 605, what this pull bar 605 passed 603 tops, groove chamber has a tip circle hole 606, and from circular hole 606 end face apertures, pass, the affixed pressing plate 607 in its top, one valve cam 608 is housed between this pressing plate bottom surface and the cylinder block end face, this camshaft supporting is in the cylinder block end face, the part of this pull bar 605 in circular hole 606 is set with a pressure spring 609, this spring 609 is bearing between circular hole bottom surface and the pull bar crossed strip seat 610, and the position of this crossed strip seat 610 and plate 604 are corresponding with the position of valve port 6 sealings.The same prior art of the cycle of motion of this valve cam 608 and driving mode.

Please refer to Fig. 8 to Figure 12, Fig. 8,9,11, the 12nd, the utility model basic principle, retraction stroke after the omission description exhaust, compare with existing internal-combustion engine, it is many pressurize stroke shown in Figure 10, all the other Fig. 8,9,11,12 are respectively air-breathing, compression, work done, exhaust, we can analyze and draw from Fig. 1 in addition, because suction stroke is not the top dead center from piston, but from begin midway, if we are not when changing the bent axle arm of force so, reach discharge capacity with the internal-combustion engine of former identical bent axle, we must realize with the area and the cylinder diameter that increase piston, we have used present technique internal-combustion engine afterwards so, the long-pending product with the bent axle arm of force of the effective machine of its piston will surpass 1/2 times of machine discharge capacity and near total displacement, thereby makes 2nd change that obtain jump of front in discussing, and the output power of having used the machine after the present technique has nearly one times lifting than the power of the machine that does not use present technique.We do not need too big power in actual use, thus we can reduce the discharge capacity of selected machine and reach identical effect, thereby realize fuel-economizing.

We should select the form of Figure 13 in actual use, and cam is similar fan-shaped, to guarantee that connecting rod is vertical with bent axle power wall when the work done, make the effective torque maximum.Certainly, when our engine speed was higher, we may collide for preventing two-piston, and we will make cam the shape of Figure 14.Purpose is except making space minimum in the cylinder when the work done, all having than large space in all the other time cylinders and avoid piston collisions.For the more effective of sub-piston shrinks back, we will set up protruding bank in the outer rim of cam in addition, and sub-piston hooks cam to hang pin, make it to be shunk back by the cam traction to see Fig. 4.The present technique valve need be arranged on the cylinder wall, and valve will change form according to actual needs simultaneously.

Fig. 7 is the spark plug distribution map of petrol engine, and the firing chamber of present technique must be formed by cylinder wall, major-minor piston one common peripheral structure, and the concrete installation of spark plug is changed the spark plug on the casing wall into oil nozzle and can be produced diesel engine by the determining positions of firing chamber.

Please refer to Fig. 2, Figure 16, cam also is to drive running by bent axle, the shape of axle is similar with main crankshaft, just the corresponding weak point of armshaft is a little, its effect is that the assurance cam avoids sub-piston extension pin to rub with the hands mutually with cam center in the running, in addition as seen from Figure 4, there is the directional post in fixed joint piston orientation the sub-piston both sides, Fig. 3 is the roughly model structure of sub-piston, and Figure 16 is the roughly compound mode figure of cam set 10, for the ease of observing, among the figure two cams are put in the same way, cam in practice is angled, Fig. 5, Fig. 6 is the job description figure of a shape valve, and its driving mode and cycle are consistent with prior art.

The cylinder seal of present technique, distribution device, circuit, oil circuit, the same prior art of lubrication system, the also same prior art of main piston, bent axle, flywheel.The bent axle of connection cam can be adorned and can not adorn flywheel.

Claims (5)

1. virtual five stroke IC engines of double-piston, the main piston (2) of work done is housed in its cylinder (1), main piston articulated linkage (12), rod hinge connection bent axle (13), bent axle connects flywheel (14), it is characterized in that: sub-piston (3) is equipped with in the top of the interior main piston of described cylinder block (1) (2), space between this main piston (2) and the sub-piston (3) constitutes firing chamber (4), spark plug (5) is arranged on the cylinder wall of respective combustion chamber (4) and/or the bottom surface of the sub-piston (2) of respective combustion chamber, the cylinder wall of respective combustion chamber (4) is provided with at least two group valves (6), main, sub-piston (2), seal ring (7) is housed in the annular groove outside (3), sub-piston (3) is connected with and makes sub-piston make the return unit that moves away from the main piston direction, and this return unit is pressure spring (8) and synchronous cam (10); Two pressure springs (8) are set on two directional posts (9) that are fixed in cylinder block; The axle (101) of described cam (10) is contained in the support (11) that is fixed in cylinder block, the axle of this cam (10) has the bent axle (105) of outside bending, selling exerts pressure keeps often contacting with the end face (301) of sub-piston (3) convex surface of this cam (10) by hanging, and this camshaft (101) is connected in bent axle (13) with driving component.

2. virtual five stroke IC engines of double-piston as claimed in claim 1, it is characterized in that: the convex surface of described cam (10) is sold the maintenance of exerting pressure by extension and with the normal contacting structure of sub-piston end face (301) is: the convex surface of this cam (10) has outer convex ring edge (102), this ring limit inner edge and extension pin contacts, this extension pin (103) is fixed in key seat (104), and this key seat is fixed in the end face of sub-piston (3).

3. virtual five stroke IC engines of double-piston as claimed in claim 1, it is characterized in that: described cam (10) convex surface is sold the maintenance of exerting pressure by extension and with the normal contacting structure of sub-piston end face (301) is: the side of cam (10) has the evagination extension to sell (103), this extension pin stretches into the chute of guide rail (16), and this guide rail (16) is installed in the end face (301) of sub-piston (3).

4. virtual five stroke IC engines of double-piston as claimed in claim 1 is characterized in that: the ignition advance angle of described cam (10) (α 1) equates with the ignition advance angle (α 2) of bent axle (13).

5. virtual five stroke IC engines of double-piston as claimed in claim 1, it is characterized in that: being configured to of valve (6) on described cylinder (1) wall: slot (601) is arranged in the valve port (6), there is protruding bank (602) this slot bottom surface and both sides, there is a groove chamber (603) the valve port top, in this groove chamber (603) plate (604) is housed, protruding bank (602) in this plate (604) edge fluted (612) and the slot is corresponding and can insert valve port is sealed, this plate (604) top connects a pull bar (605), what this pull bar (605) passed groove chamber (603) top has a tip circle hole (606), and from circular hole (606) end face aperture, pass, the affixed pressing plate in its top (607), one valve cam (608) is housed between this pressing plate bottom surface and the cylinder block end face, this camshaft supporting is in the cylinder block end face, the part of this pull bar (605) in circular hole (606) is set with a pressure spring (609), this spring (609) is bearing between circular hole bottom surface and the pull bar crossed strip seat (610), and the position of this crossed strip seat (610) and plate (604) are corresponding with the position of valve port (6) sealing.

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