CN211692635U

CN211692635U - Mechanical supercharged two-stroke compression ignition engine

Info

Publication number: CN211692635U
Application number: CN202020434398.0U
Authority: CN
Inventors: 王世峰; 王睿宁
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-10-16
Anticipated expiration: 2030-03-30

Abstract

The utility model discloses a mechanical supercharged two-stroke compression ignition engine, which comprises a transmission crankshaft, at least one working cylinder and at least one supercharging cylinder which are arranged in parallel; a working piston is arranged in the working cylinder, and a pressurizing piston is arranged in the pressurizing cylinder; the utility model provides a mechanical supercharging type two-stroke compression ignition engine can increase the air inlet capacity of the engine under the forced scavenging and supercharging effects of the supercharging cylinder to improve the compression ratio, the utility model has reasonable and practical structure, can further improve the heat efficiency, saves fuel oil, increases power, promotes the high-efficiency heat dissipation of the engine to achieve the purposes of energy saving and environmental protection; the device can be applied to automobiles, motorcycles, extended range motor vehicles, generator sets and other places needing fuel mechanical energy conversion; has high practical value.

Description

Mechanical supercharged two-stroke compression ignition engine

Technical Field

The utility model relates to the technical field of engines, concretely relates to machinery booster-type two-stroke compression ignition engine.

Background

With the development of modern society, people have higher and higher requirements on the dynamic property and the economical efficiency of the engine. The conversion efficiency of a two-stroke engine is theoretically twice that of a four-stroke engine, which fires once every revolution, and which fires once every other revolution. This gives the two-stroke engine an important power base. These advantages make the two-stroke engine more portable, simple and inexpensive to manufacture. Two-stroke engines additionally have the potential to double the power into the same space, as it has double the power stroke per revolution. The combination of light weight and double power makes it a surprising "push to weight ratio" compared to many four-stroke engines.

However, the conventional two-stroke engine has insufficient combustion and relatively high pollutant emission rate due to incomplete scavenging process and oil carried into the cylinder, and has poor heat dissipation effect, so that the conventional two-stroke engine is not adopted on a large scale.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a machinery booster-type two-stroke compression ignition engine can improve engine thermal efficiency, practices thrift the fuel, increase power to promote the high-efficient heat dissipation of engine in order to reach energy-concerving and environment-protective purpose.

The utility model adopts the technical proposal that: a mechanical supercharged two-stroke compression-ignition engine comprises a transmission crankshaft, at least one working cylinder and at least one supercharging cylinder which are arranged in parallel; a working piston is arranged in the working cylinder, and a pressurizing piston is arranged in the pressurizing cylinder; the working cylinder is provided with a working air inlet and a working air outlet; a supercharging air inlet and a supercharging exhaust port are arranged on the supercharging cylinder; a one-way air inlet mechanism is arranged between the supercharging exhaust port and the acting air inlet, so that air in the supercharging cylinder can enter the acting cylinder from the supercharging exhaust port through the acting air inlet in a one-way manner; the transmission crankshaft can rotate in the circumferential direction and is connected with the acting piston and the supercharging piston in series, and when the acting piston moves upwards to compress gas, the supercharging piston moves downwards to enable negative pressure to be formed inside the supercharging cylinder and enable air to be input into the supercharging cylinder from the supercharging air inlet; when the working piston moves downwards to enable the gas in the working cylinder to be discharged from the working exhaust port, the compressed gas in the boosting cylinder moves upwards to enable the compressed gas in the boosting cylinder to be discharged from the boosting exhaust port and input into the working cylinder through the working air inlet.

The mechanical supercharging type two-stroke compression ignition engine provided by the technical scheme increases the air intake capacity of the engine and improves the compression ratio in a mechanical supercharging mode, so that the engine has a higher combustion compression ratio; the boosting cylinder and the working cylinder are arranged in parallel, the working piston in the working cylinder and the boosting piston in the boosting cylinder rotate simultaneously when the transmission crankshaft rotates, gas in the working cylinder is compressed and forms a special mixture with fuel oil when the working piston moves upwards to compress the working cylinder, and meanwhile, the boosting cylinder moves downwards to enable the inside of the boosting cylinder to be at negative pressure, so that external gas is quickly discharged into the boosting cylinder through the boosting air inlet; particularly, the mixture can reach a combustion explosion point after being compressed, so that the acting piston does work to enable the acting piston to move downwards, and the combusted gas is discharged from the acting exhaust port; in addition, the gas after being pressurized in the pressurizing cylinder can expand rapidly at the moment when entering the working cylinder, and the heat dissipation of the working cylinder can be realized according to the gas expansion cooling principle, so that the heat dissipation efficiency of the working cylinder is improved.

The continuous work is realized in the reciprocating circulation in the process, the air inlet capacity of the engine is increased under the forced scavenging and supercharging effects of the supercharged cylinder to improve the compression ratio, so that the heat efficiency is further improved, the fuel is saved, the power is increased, and the technical defects of poor engine oil cylinder entering combustion, heat dissipation and scavenging effects, waste of fuel discharged along with an exhaust port and the like of the two-stroke engine are overcome.

Preferably, the one-way air inlet mechanism is including locating the interior admission valve of doing work air inlet, the admission valve is connected with the elastic component, works as when doing work cylinder goes upward compressed gas, the admission valve can seal the air inlet of doing work under the elastic component elastic force effect, and when pressure boost piston goes upward compressed gas, compressed gas pressure can overcome elastic component elasticity and open in the air inlet of doing work inputs the work cylinder.

Preferably, an electronic fuel injector for injecting fuel into the working cylinder is arranged in the working cylinder.

Preferably, the transmission crankshaft is respectively provided with an acting connection corner and a boosting connection corner which are connected with the acting piston and the boosting piston, and the acting connection corner and the boosting connection corner are arranged in a mirror symmetry mode by taking the length direction of the transmission crankshaft as a symmetry axis.

Preferably, when the number of the working cylinders is single, the inertia pendulum bob for increasing inertia is arranged on the working connection corner or the pressurization connection corner of the transmission crankshaft.

Preferably, the acting piston and the pressurizing piston are in transmission connection with the acting connection corner and the pressurizing connection corner through connecting rods.

Preferably, the working air inlet is positioned above an upper dead center of the working cylinder corresponding to the working piston.

Preferably, the work doing exhaust port is located above a down dead center of the work doing piston corresponding to the work doing cylinder.

Preferably, the boost air inlet is positioned above a down dead center of the boost piston corresponding to the boost cylinder.

Preferably, the supercharging exhaust port is positioned above an upper dead center of the supercharging cylinder corresponding to the supercharging piston.

The utility model has the advantages that: the utility model provides a mechanical supercharging type two-stroke compression ignition engine can increase the air inlet capacity of the engine under the forced scavenging and supercharging effects of the supercharging cylinder to improve the compression ratio, the utility model has reasonable and practical structure, further improves the heat efficiency, saves fuel oil, increases power, promotes the heat dissipation of the engine to achieve the purposes of energy saving and environmental protection; the device can be widely used for automobiles, motorcycles, extended range motor vehicles, generator sets and other places needing fuel mechanical energy conversion; has high practical value.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic view of an embodiment of the present invention, showing a mechanically supercharged two-stroke compression ignition engine 1

Fig. 2 is a schematic operation diagram 2 of a mechanically supercharged two-stroke compression-ignition engine according to a first embodiment of the present invention.

Reference numerals: the engine comprises a work cylinder 100, a work piston 110, a work air inlet 120, a work air outlet 130, a booster cylinder 200, a booster piston 210, a booster air inlet 220, a booster air outlet 230, a transmission crankshaft 300, a work connection corner 310, a booster connection corner 320, an air inlet valve 400, an elastic piece 500, an electronic fuel injector 600, an inertial pendulum 700 and a connecting rod 800.

Detailed Description

Here, it is to be noted that the functions, methods, and the like related to the present invention are only conventional adaptive applications of the related art. Therefore, the present invention is an improvement of the prior art, which substantially lies in the connection relationship between hardware, not in the functions and methods themselves, that is, the present invention relates to a few functions and methods, but does not include the improvements proposed in the functions and methods themselves. The present invention is described for better illustration of the function and method for better understanding of the present invention.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

Referring to fig. 1 and fig. 2, the mechanically supercharged two-stroke compression-ignition engine provided in the present embodiment increases the intake air capacity of the engine and increases the compression ratio by means of mechanical supercharging, so that the engine has a higher combustion compression ratio; the device specifically comprises a transmission crankshaft 300, at least one working cylinder 100 and at least one supercharging cylinder 200 which are arranged in parallel; a working piston 110 is arranged in the working cylinder 100, and a booster piston 210 is arranged in the booster cylinder 200; the working cylinder 100 is provided with a working air inlet 120 and a working air outlet 130; a supercharging air inlet 220 and a supercharging air outlet 230 are arranged on the supercharging cylinder 200; a one-way air inlet mechanism is arranged between the supercharging exhaust port 230 and the acting air inlet 120, so that air in the supercharging cylinder 200 can enter the acting cylinder 100 from the supercharging exhaust port 230 through the acting air inlet 120 in a one-way manner; the transmission crankshaft 300 can rotate circumferentially and is connected in series with the working piston 110 and the booster piston 210, and when the working piston 110 moves upwards to compress gas, the booster piston 210 moves downwards to enable the inside of the booster cylinder 200 to form negative pressure and enable air to be input into the booster cylinder 200 from the booster air inlet 220; when the working piston 110 moves downwards to discharge the gas in the working cylinder 100 from the working exhaust port, the compressed gas in the supercharge cylinder 200 moves upwards to discharge the compressed gas in the supercharge cylinder 200 from the supercharge exhaust port and input the compressed gas into the working cylinder 100 through the working intake port 120. The booster cylinder 200 used for increasing the air input in the working cylinder 100 is arranged in parallel with the working cylinder 100, when the transmission crankshaft 300 rotates, the working piston 110 in the working cylinder 100 and the booster piston 210 in the booster cylinder 200 rotate simultaneously, when the working piston 110 moves upwards to compress the working cylinder 100, the gas in the working cylinder 100 is compressed and forms a special mixture with fuel oil, and meanwhile, the booster cylinder 200 moves downwards to enable the interior of the booster cylinder 200 to be at negative pressure, so that the external gas is rapidly discharged into the booster cylinder 200 through the booster air inlet 220; particularly, the mixture can reach a combustion explosion point after being compressed, work is applied to the work piston 110 to enable the work piston 110 to move downwards, and combusted gas is exhausted from the work applying exhaust port, in the process, the booster cylinder 200 can compress the gas in the booster cylinder 200 to be input into the booster cylinder 200 through the booster exhaust port 230 and the work applying air inlet 120 in sequence, so that the booster cylinder 200 is subjected to forced scavenging, and fresh air with partial pressure is supplemented. The continuous operation of the working cylinder 200 forms the reciprocating cycle of the flow that the supercharged cylinder 200 sucks air, the supercharged cylinder 200 compresses air, the working cylinder applies work, the working cylinder exhausts air, the supercharged cylinder 200 gas enters the working cylinder to forcedly scavenge air, continuous work is realized, the air inlet capacity of the engine is increased under the action of forced scavenging and supercharging of the supercharged cylinder 200 to improve the compression ratio, so that the thermal efficiency is further improved, fuel is saved, and the power is increased.

As shown in fig. 1 and fig. 2, in the present embodiment, one working cylinder 100 and two supercharge cylinders 200 are selected, the two supercharge cylinders 200 are located at two sides of the working cylinder 100, and the two supercharge cylinders 200 supercharge one working cylinder 100 at the same time, so as to increase the air intake amount of air, and further implement high-efficiency working.

As described above, the one-way air intake mechanism is configured to open and close an air path between the supercharging exhaust port 230 and the working air inlet 120, so that the compressed air in the supercharging cylinder 200 can enter the working cylinder 100, the one-way air intake mechanism provided in this embodiment includes the air intake valve 400 disposed in the working air inlet 120, the air intake valve 400 is connected to the elastic member 500, when the working cylinder 100 moves upward to compress air, the air intake valve 400 can close the working air inlet 120 under the elastic force of the elastic member 500, and when the supercharging piston 210 moves upward to compress air, the pressure of the compressed air can overcome the elastic force of the elastic member 500 to open the working air inlet 120 and input the compressed air into the working cylinder 100. When air in the working cylinder 100 is compressed, the air inlet valve 400 can be normally closed, and when the compressed gas mixed with oil and gas is combusted and discharged out of the working cylinder 100, the gas in the booster cylinder 200 can quickly enter the working cylinder 100 to realize pressurization and forced scavenging. The elastic member 500 may preferably be a spring.

As shown in fig. 1 and 2, in order to mix the fuel with the air in the working cylinder 100, the present embodiment is provided with an electronic fuel injector 600 that injects the fuel into the working cylinder 100 in the working cylinder 100. The fuel injector is able to deliver the fuel in the proper amount to the correct location and mix with air and burn in the supercharge cylinder 200 during the compression of the gas by the appropriate working cylinder 100. The electronic fuel injector 600 can be precisely controlled in terms of its injected fuel quantity by other sensors and controllers.

As shown in fig. 1 and fig. 2, since the working cylinder 100 compresses in the upward direction, the supercharging cylinder 200 needs to suck external air in the downward direction, in order to achieve synchronous operation, the working connection corner 310 and the supercharging connection corner 320 connected to the working piston 110 and the supercharging piston 210 are respectively disposed on the transmission crankshaft 300, and the working connection corner 310 and the supercharging connection corner 320 are arranged in mirror symmetry with the longitudinal direction of the transmission crankshaft 300 as a symmetry axis. In this way, the working connection corner 310 and the supercharging connection corner 320 can be connected to the working piston 110 and the supercharging piston 210, so that different operating states of simultaneously driving the working piston 110 and the supercharging piston 210 are realized. In addition, in the present embodiment, the working piston 110 and the pressurizing piston 210 are in transmission connection with the working connection corner 310 and the pressurizing connection corner 320 through the connecting rod 800.

As shown in fig. 1 and 2, when the number of the working cylinders 100 is single, the operation continuity of the engine is relatively weak, and thus when the number of the working cylinders 100 is single, the inertia bob 700 for increasing inertia is provided on the working connection corner 310 or the supercharging connection corner 320 of the transmission crankshaft 300. The inertia pendulum 700 may have inertia, and the driving crankshaft 300 continues to rotate under the action of inertia kinetic energy under the action of the inertia pendulum 700, pushes the working piston 110 in the working cylinder to move to the top dead center, and pulls the pressurizing piston 210 of the pressurizing cylinder 200 to move to the bottom dead center. The running stability and continuity of the single-cylinder engine can be improved.

As shown in fig. 1 and 2, in order to enable the air in the supercharge cylinder 200 to perform forced scavenging and supercharging on the work cylinder 100 immediately after the work cylinder 100 performs work, the work intake port 120 is located above the upper dead center of the work cylinder 100 corresponding to the work piston 110 and the work exhaust port 130 is located above the lower dead center of the work cylinder 100 corresponding to the work piston 110 in this embodiment. The boost inlet 220 is located above the downward dead center of the boost cylinder 200 corresponding to the boost piston 210, and the boost outlet 230 is located above the upward dead center of the boost cylinder 200 corresponding to the boost piston 210. Thus, when the working piston 110 in the working cylinder 100 moves down to the working exhaust port, the combustion gas can be exhausted, one-time working is completed and the pressure in the working cylinder is released, and at the same time, the air in the supercharge cylinder 200 is pressed to the top dead center by the supercharge piston 210 to push the one-way air intake mechanism to enter the working cylinder 100, and at this time, the working piston 110 is still at the position below the working exhaust port, and the compressed air performs forced scavenging on the inside of the working cylinder 100 and supplements the fresh air still having partial pressure.

In the description of the present application, it is to be understood that the terminology used herein is for the purpose of description only and is not intended to be interpreted as indicating or implying any relative importance or implicit indication of the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral combinations thereof; may be an electrical connection; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the specification of the present invention, a large number of specific details are explained. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, systems, and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. A mechanically supercharged two-stroke compression ignition engine, characterized in that: comprises a transmission crankshaft (300), at least one working cylinder (100) and at least one supercharging cylinder (200) which are arranged in parallel; a working piston (110) is arranged in the working cylinder (100), and a booster piston (210) is arranged in the booster cylinder (200);

the working cylinder (100) is provided with a working air inlet (120) and a working air outlet (130); a supercharging air inlet (220) and a supercharging exhaust port (230) are arranged on the supercharging cylinder (200); a one-way air inlet mechanism is arranged between the supercharging exhaust port (230) and the acting air inlet (120), so that air in the supercharging cylinder (200) can enter the acting cylinder (100) from the supercharging exhaust port (230) through the acting air inlet (120) in a one-way manner;

the transmission crankshaft (300) can rotate in the circumferential direction and is connected with the working piston (110) and the booster piston (210) in series, when the working piston (110) moves upwards to compress gas, the booster piston (210) moves downwards to enable negative pressure to be formed inside the booster cylinder (200) and enable air to be input into the booster cylinder (200) from the booster air inlet (220); when the working piston (110) moves downwards to enable gas in the working cylinder (100) to be discharged from the working exhaust port (130), the boosting cylinder (200) moves upwards to compress the gas, so that the compressed gas in the boosting cylinder (200) is discharged from the boosting exhaust port and is input into the working cylinder (100) through the working air inlet (120).

2. The mechanically supercharged, two-stroke compression-ignition engine of claim 1 wherein:

one-way air inlet mechanism is including locating admission valve (400) in doing work air inlet (120), admission valve (400) are connected with elastic component (500), work as during doing work cylinder (100) goes upward compressed gas, admission valve (400) can seal doing work air inlet (120) under elastic component (500) elasticity effect, and when pressure boost piston (210) go upward compressed gas, compressed gas pressure can overcome elastic component (500) elasticity and open doing work air inlet (120) and input in doing work cylinder (100).

3. The mechanically supercharged, two-stroke compression-ignition engine of claim 1 wherein:

an electronic fuel injector (600) for injecting fuel into the working cylinder (100) is arranged in the working cylinder (100).

4. The mechanically supercharged, two-stroke compression-ignition engine of claim 1 wherein:

the working connection corner (310) and the supercharging connection corner (320) connected with the working piston (110) and the supercharging piston (210) are respectively arranged on the transmission crankshaft (300), and the working connection corner (310) and the supercharging connection corner (320) are arranged in a mirror symmetry mode by taking the long direction of the transmission crankshaft (300) as a symmetry axis.

5. The mechanically supercharged two-stroke compression-ignition engine of claim 4 wherein:

when the number of the working cylinders (100) is single, the inertia pendulum bob (700) for increasing inertia is arranged on the working connection corner (310) or the pressurizing connection corner (320) of the transmission crankshaft (300).

6. The mechanically supercharged two-stroke compression-ignition engine of claim 4 wherein:

the working piston (110) and the pressurizing piston (210) are in transmission connection with the working connection corner (310) and the pressurizing connection corner (320) through a connecting rod (800).

7. The mechanically supercharged, two-stroke compression-ignition engine of claim 1 wherein: the working air inlet (120) is positioned above an upper dead center of the working cylinder (100) corresponding to the working piston (110).

8. The mechanically supercharged, two-stroke compression-ignition engine of claim 1 wherein: the work doing exhaust port (130) is located above a work doing piston (110) downward dead center corresponding to the work doing cylinder (100).

9. The mechanically supercharged, two-stroke compression-ignition engine of claim 1 wherein: the boost air inlet (220) is positioned above a down dead center of the boost cylinder (200) corresponding to the boost piston (210).

10. The mechanically supercharged, two-stroke compression-ignition engine of claim 1 wherein: the supercharging exhaust port (230) is positioned above an upper dead center of the supercharging cylinder (200) corresponding to the supercharging piston (210).