CN111140342B - Gas engine combustion system and gas engine having the same - Google Patents

Abstract

The invention discloses a gas engine combustion system and a gas engine having the same. The gas engine combustion system includes a cylinder head assembly, a cylinder block and a piston. The cylinder head assembly includes a cylinder head body and intake air respectively arranged on the cylinder head body. Mechanism and exhaust mechanism, the cylinder head is provided with an inner groove, a first intake hole, a second intake hole and a convex structure, the first intake hole and the second intake hole are respectively connected with the inner groove, the convex structure The lifting structure is arranged on the inner wall of the inner groove and is located between the first air inlet hole and the second air inlet hole, the cylinder body is provided with a cylinder hole, the piston is arranged in the cylinder hole in a movable manner, and the cylinder head is connected to the cylinder. The inner groove is correspondingly arranged with the cylinder hole. When the gas enters through the first air inlet hole and the second air inlet hole respectively, the raised structure avoids the interference of the two air flows, ensures the flow speed and combustion speed of the gas, and avoids the knocking of the gas engine and the overheating of the exhaust gas. high question.

Description

Gas engine combustion system and gas engine having the same

technical field

The present invention relates to the technical field of engines, in particular to a gas engine combustion system. The invention also relates to an engine.

Background technique

This section provides merely background information related to the present disclosure and is not necessarily prior art.

Since natural gas does not contain C-C chains in combustion, the emission of soot generated during the combustion process is very low. At the same time, the proportion of carbon content in natural gas is low. When the same amount of heat is released, the carbon emission is lower than that of diesel and gasoline fuels. Natural gas as a fuel can effectively control emissions, which is of great significance to alleviating environmental pollution and reducing carbon emissions.

However, the propagation speed of the laminar flame of natural gas is slow, which leads to a slow combustion speed of the gas engine, and is prone to the problems of knocking and excessive exhaust temperature of the gas engine.

SUMMARY OF THE INVENTION

The purpose of the present invention is to at least solve the problems that the combustion speed of the gas engine is slow, and the gas engine is prone to knocking and the exhaust gas temperature is too high. This purpose is achieved through the following technical solutions:

A first aspect of the present invention proposes a gas engine combustion system, the gas engine combustion system comprising:

A cylinder head assembly, the cylinder head assembly includes a cylinder head body and an air intake mechanism and an exhaust mechanism respectively arranged on the cylinder head body, and the cylinder head is provided with an inner groove, a first air intake hole and a first air intake mechanism. Two air inlet holes and a convex structure, the first air intake hole and the second air intake hole are respectively communicated with the inner groove, and the convex structure is arranged on the inner wall surface of the inner groove and located between the first air intake hole and the second air intake hole;

A cylinder body and a piston, the cylinder body is provided with a cylinder hole, the piston is movably arranged in the cylinder hole hole, the cylinder cover is matched with the cylinder body, and the inner groove is matched with the cylinder body. The cylinder holes are set accordingly.

According to the gas engine combustion system of the present invention, the protruding structure is arranged on the inner wall of the inner groove and is located between the first intake hole and the second intake hole, and when the combustion system is started, the piston moves away from the inside along the cylinder hole. The direction of the groove moves, the gas enters the space formed by the inner groove and the cylinder hole through the first air inlet hole and the second air inlet hole respectively, and the piston moves in the direction close to the inner groove. At the top dead center, the gas is pressed into the inner groove, and the compressed gas in the inner groove is ignited to provide power for the engine. When the gas enters through the first air inlet hole and the second air inlet hole respectively, since the convex structure is arranged between the first air inlet hole and the second air inlet hole, the interference of the two air flows is avoided, thereby ensuring the gas flow. The flow speed ensures the combustion speed after the gas is ignited, thereby avoiding the problems of knocking and excessive exhaust temperature in the gas engine.

In addition, the gas engine combustion system according to the present invention may further have the following additional technical features:

In some embodiments of the present invention, the protruding structure extends toward the cylinder bore.

In some embodiments of the present invention, the outer surface of the protruding structure is a circular arc surface.

In some embodiments of the present invention, the cylinder head is further provided with a first exhaust hole, a second exhaust hole and a groove structure, the first exhaust hole and the second exhaust are respectively connected with the The inner groove communicates with each other, and the groove structure includes a first groove portion, and the first groove portion is arranged on the inner wall surface of the inner groove and located at the first exhaust hole and the second exhaust hole. between the vents.

In some embodiments of the present invention, the cylinder head is further provided with a second groove portion, and the second groove portion is provided on the inner wall surface of the inner groove and is located at the first air intake hole and the first exhaust hole.

In some embodiments of the present invention, the cylinder head is further provided with a third groove portion, and the third groove portion is provided on the inner wall surface of the inner groove and is located at the second air intake hole and the second vent hole.

In some embodiments of the present invention, an exhaust passage is provided on the cylinder head, and the first exhaust hole and the second exhaust hole are respectively communicated with the exhaust passage;

The exhaust mechanism includes a first exhaust valve, a second exhaust valve and a first drive device, the first exhaust valve is provided in the first exhaust hole, and the second exhaust valve is provided in the the second exhaust hole, and the first driving device is respectively connected with the first exhaust valve and the second exhaust valve.

In some embodiments of the present invention, the cylinder head is provided with a first intake passage and a second intake passage, the first intake passage communicates with the first intake hole, and the second intake passage an air passage communicates with the second air inlet;

The intake mechanism includes a first intake valve, a second intake valve and a second drive device, the first intake valve is provided in the first intake hole, and the second intake valve is provided in the the second intake hole, and the second drive device is respectively connected to the first intake valve and the second intake valve.

In some embodiments of the present invention, the first intake passage is a spiral intake passage;

And/or the second intake port is a tangential intake port;

And/or the second driving device has a variable lift structure.

A second aspect of the present invention proposes a gas engine comprising the gas engine combustion system as described above.

According to the gas engine of the present invention, in the gas engine combustion system of the gas engine, the protruding structure is arranged on the inner wall surface of the inner groove and is located between the first air intake hole and the second air intake hole, when the combustion system is started , the piston moves along the cylinder hole in the direction away from the inner groove, the gas enters the space formed by the inner groove and the cylinder hole through the first air inlet hole and the second air inlet hole respectively, and the piston moves closer to the inner groove. When the piston reaches the top dead center of its motion, the gas is pressed into the inner groove, and by igniting the compressed gas in the inner groove, the engine is powered. When the gas enters through the first air inlet hole and the second air inlet hole respectively, since the convex structure is arranged between the first air inlet hole and the second air inlet hole, the interference of the two air flows is avoided, thereby ensuring the gas flow. The flow speed ensures the combustion speed after the gas is ignited, thereby avoiding the problems of knocking and excessive exhaust temperature in the gas engine.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating preferred embodiments only and are not to be considered limiting of the invention. Also, the same components are denoted by the same reference numerals throughout the drawings. In the attached image:

FIG. 1 schematically shows a schematic structural diagram of a gas engine combustion system according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the cylinder head assembly of the gas engine combustion system shown in FIG. 1 (only a part of the structure is shown);

FIG. 3 is a schematic structural diagram of the cylinder head assembly shown in FIG. 2 from another perspective.

The reference numbers are as follows:

100 is the gas engine combustion system;

10 is the cylinder head;

101 is the first air inlet hole, 102 is the second air inlet hole, 103 is the convex structure, 104 is the first groove part, 105 is the second groove part, 106 is the third groove part, 107 is the first groove part Exhaust holes, 108 is the second exhaust hole, 109 is the inner groove, 110 is the exhaust passage, and 111 is the first intake passage;

20 is the piston;

30 is an intake mechanism, 31 is a first intake valve, 32 is a second intake valve, 33 is a first exhaust valve, 34 is a second exhaust valve, and 35 is a second driving device.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" can also be intended to include the plural forms unless the context clearly dictates otherwise. The terms "comprising", "comprising", "containing" and "having" are inclusive and thus indicate the presence of stated features, steps, operations, elements and/or components, but do not preclude the presence or addition of one or Various other features, steps, operations, elements, components, and/or combinations thereof. Method steps, procedures, and operations described herein are not to be construed as requiring that they be performed in the particular order described or illustrated, unless an order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be restricted by these terms. These terms may only be used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of example embodiments.

For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures, such as "inner", "outer", "inner" ", "outside", "below", "below", "above", "above", etc. This spatially relative term is intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "above the other elements or features" above features". Thus, the example term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in FIGS. 1 to 3 , according to an embodiment of the present invention, the present invention provides a gas engine combustion system 100 . The gas engine combustion system 100 includes a cylinder head assembly, a cylinder block and a piston 20 , and the cylinder head assembly includes a cylinder head 10 body and the intake mechanism 30 and exhaust mechanism respectively arranged on the cylinder head 10 body, the cylinder head 10 is provided with an inner groove 109, a first intake hole 101 and a second intake hole 102 and a raised structure 103 , the first air intake hole 101 and the second air intake hole 102 are respectively communicated with the inner groove 109, and the raised structure 103 is arranged on the inner wall surface of the inner groove 109 and is located in the first air intake hole 101 and the second air intake hole Between 102, the cylinder body is provided with a cylinder hole, the piston 20 is movably arranged in the cylinder hole, the cylinder cover 10 is matched with the cylinder body, and the inner groove 109 is correspondingly arranged with the cylinder hole.

Specifically, the protruding structure 103 is disposed on the inner wall surface of the inner groove 109 and is located between the first intake hole 101 and the second intake hole 102. When the combustion system is started, the piston 20 moves away from the inner concave along the cylinder bore. When the direction of the groove 109 moves, the gas enters the space formed by the inner groove 109 and the cylinder hole through the first air inlet hole 101 and the second air inlet hole 102 respectively, and the piston 20 moves in the direction close to the inner groove 109. When When the piston 20 reaches the top dead center of its motion, the gas is pressed into the inner groove 109, and the compressed gas in the inner groove 109 is ignited to provide power for the engine, and the burned exhaust gas is discharged through the exhaust mechanism. When the gas enters through the first air inlet hole 101 and the second air inlet hole 102 respectively, since the protruding structure 103 is arranged between the first air inlet hole 101 and the second air inlet hole 102, the interference of the two air flows is avoided. Therefore, the flow speed of the gas is ensured, so that the combustion speed after the gas is ignited is guaranteed, thereby avoiding the problems of knocking and excessive exhaust temperature of the gas engine.

It should be understood that the raised structure 103 is formed on the inner wall surface of the inner groove 109. The raised structure 103 is formed by the inner wall of the inner groove 109 facing the interior of the inner groove 109 and has a certain height. The air inlet hole 101 and the second air inlet hole 102 are respectively opened on both sides of the arched structure. When the gas entering through the first air inlet hole 101 and the second air inlet hole 102 is within the height range of the raised structure 103 The protruding structure 103 forms a barrier for the gas entering on both sides of the protruding structure 103 to avoid the situation of mutual turbulence and reducing the flow speed. When the gas is outside the range, the gases entering through the first air inlet hole 101 and the second air inlet hole 102 respectively are mixed, so as to ensure that the gas can be fully mixed, so that the combustion efficiency is guaranteed.

It should be pointed out that after the gas enters the space formed by the inner groove 109 and the cylinder hole through the first air inlet hole 101 and the second air inlet hole 102, the gas forms a vortex in the inner groove 109 and the cylinder hole (the gas flows around the cylinder). The axis of the hole has an organized rotary motion) and tumble flow (a type of airflow movement in the cylinder hole, named after the flow direction of its vortex is perpendicular to the axis of the cylinder hole), which further ensures the flow speed of the gas and avoids the Gas engines have problems with knocking and high exhaust temperatures. In addition, in order to improve the wear resistance of the cylinder block, a cylinder liner is installed in the cylinder hole, and the piston is arranged in the cylinder liner in a movable manner. The cylinder liner is then installed on the cylinder block so that it can be repaired and replaced individually. In addition, in the present application, the inner groove 109 is a dome structure, and the piston 20 is a squeezing piston, which further ensures the squeezing effect on the gas, thereby ensuring the airflow velocity.

It is further understood that, as shown in FIG. 2 and FIG. 3 , the protruding structure 103 extends in the direction of the cylinder bore. Specifically, the inner wall surface of the inner groove 109 is a concave arc surface and faces the cylinder bore. Both the air intake hole 101 and the second air intake hole 102 are inclined to the axial direction of the cylinder hole, so that the gas entering the inner groove 109 through the first air intake hole 101 and the second air intake hole 102 enters the direction inclined to the cylinder bore. In the axial direction of the hole, by extending the protruding structure 103 towards the direction of the cylinder hole, the two sides of the protruding structure 103 respectively block the gas entering through the first air intake hole 101 and the second air intake hole 102, which effectively avoids the The interference of the two airflows ensures the airflow velocity entering the inner groove 109 and the cylinder bore, so that the combustion rate is further guaranteed.

It should be pointed out that the diameters of the first air intake hole 101 and the second air intake hole 102 are the same, the width of the raised structure 103 is greater than or equal to the radius of the first air intake hole 101 , the center of the first air intake hole 101 and the The connection line between the holes of the second air inlet holes 102 passes through the middle position of the raised structure 103 vertically, thereby further ensuring the blocking of the airflow on both sides of the raised structure 103, so that the entry speed of the gas is guaranteed.

Further, as shown in FIG. 2 and FIG. 3 , the outer surface of the protruding structure 103 is a circular arc surface. Specifically, by setting the outer surface of the protruding structure 103 as an arc surface, the friction when the gas contacts the protruding structure 103 is reduced, thereby reducing the influence of the protruding structure 103 on the airflow velocity, so that the combustion rate can be obtained In order to guarantee, the problems of knocking and excessive exhaust gas temperature in the gas engine are avoided.

It should be pointed out that the cross section of the raised structure 103 along the axial direction of the cylinder bore is approximately elliptical, and the airflow flows along the outer edge of the elliptical structure, which further reduces the influence of the raised structure 103 on the airflow speed, so that the speed of the intake air is reduced. Guaranteed.

Further, as shown in FIG. 2 and FIG. 3 , the cylinder head 10 is further provided with a first exhaust hole 107 , a second exhaust hole 108 and a groove structure. The first exhaust hole 107 and the second exhaust hole are respectively connected with The inner groove 109 communicates with each other, and the groove structure includes a first groove portion 104. The first groove portion 104 is arranged on the inner wall surface of the inner groove 109 and is located between the first exhaust hole 107 and the second exhaust hole 108. . Specifically, the first exhaust hole 107 and the second exhaust hole 108 are both used to discharge the exhaust gas after combustion, and the inner wall between the first exhaust hole 107 and the second exhaust hole 108 is provided with a first concave In the groove part 104, when the piston 20 runs along the cylinder hole to its top dead center, the compressed gas enters the first groove part 104, and the gas is in a moving state in the first groove part 104, which further ensures the airflow speed , increasing the combustion rate, thereby avoiding the problems of knocking and excessive exhaust temperature in gas engines. It should be understood that when the piston 20 is at the top dead center, the space formed by the piston 20 and the inner groove 109 is used to compress the gas, and the compressed gas is in a vortex motion. With the first groove portion 104, the vortex motion of the gas is enhanced, and when the gas is ignited, the propagation speed of the flame and the thermal efficiency in the later stage of combustion are improved, and the emission is reduced.

It should be pointed out that the inner wall surface of the inner wall surface of the inner groove 109 is recessed to form a groove structure, and the surface of the first groove portion 104 of the groove structure is a first arc surface. The surface is set as the first arc surface, which reduces the influence of the surface of the first groove portion 104 on the airflow, ensures the airflow speed, and avoids the problems of knocking and excessive exhaust temperature of the gas engine.

In addition, the first air inlet hole 101, the second air inlet hole 102, the first air outlet hole 107 and the second air outlet hole 108 are arranged at intervals on the inner wall surface of the inner groove 109, and at the same time, the four are arranged in a rectangular shape. An intake hole 101 is adjacent to the second intake hole 102, and the first exhaust hole 107 is adjacent to the second exhaust hole 108, thereby ensuring the stability of the intake and exhaust of the engine.

Further, as shown in FIG. 2 and FIG. 3 , the cylinder head 10 is further provided with a second groove portion 105 , and the second groove portion 105 is disposed on the inner wall surface of the inner groove 109 and located at the first air intake hole 101 and the first exhaust hole 107 . Specifically, the second groove portion 105 is disposed between the first intake hole 101 and the second exhaust hole 108. When the piston 20 runs along the cylinder bore to its top dead center, the compressed gas enters the first groove. In the groove portion 104 and the second groove portion 105, the gas is in a moving state in the first groove portion 104 and the second groove portion 105, which further ensures the airflow speed and improves the combustion rate, thereby avoiding the gas engine. There are problems with knocking and excessive exhaust temperature.

It should be understood that when the piston 20 is at the top dead center, the space formed by the piston 20 and the inner groove 109 is used to compress the gas, and the compressed gas is in a vortex motion. With the first groove part 104 and the second groove part 105, the vortex motion of the gas is enhanced, and when the gas is ignited, the flame propagation speed and thermal efficiency in the later stage of combustion are improved, and the emission is reduced.

It should be noted that the surface of the inner wall surface of the inner groove 109 is recessed to form the second groove portion 105, and the surface of the second groove portion 105 is a second arc-shaped surface. The second arc-shaped surface reduces the influence of the surface of the second groove portion 105 on the airflow, ensures the airflow speed, and avoids the problems of knocking and excessive exhaust temperature in the gas engine.

Further, as shown in FIG. 2 and FIG. 3 , the cylinder head 10 is further provided with a third groove portion 106 , and the third groove portion 106 is arranged on the inner wall surface of the inner groove 109 and is located in the second air intake hole 102 and the second exhaust hole 108 . Specifically, the third groove portion 106 is disposed between the second intake hole 102 and the second exhaust hole 108. When the piston 20 runs along the cylinder bore to its top dead center, the compressed gas enters the first groove. In the groove part 104 , the second groove part 105 and the third groove part 106 , the gas is in a moving state in the first groove part 104 and in the second groove part 105 and the third groove part 106 , which further ensures the airflow speed and improves the combustion rate, thereby avoiding the problems of knocking and excessive exhaust temperature in the gas engine.

It should be understood that when the piston 20 is at the top dead center, the space formed by the piston 20 and the inner groove 109 is used to compress the gas, and the compressed gas is in a vortex motion. There are a first groove part 104, a second groove part 105 and a third groove part 106, so that the vortex movement of the gas is enhanced. emission.

It should be pointed out that the surface of the inner wall surface of the inner groove 109 is recessed to form the third groove portion 106, and the surface of the third groove portion 106 is a third arc-shaped surface. The third arc-shaped surface reduces the influence of the surface of the third groove portion 106 on the airflow, ensures the airflow speed, and avoids the problems of knocking and excessive exhaust temperature in the gas engine.

Further, as shown in FIG. 2 and FIG. 3 , the cylinder head 10 is provided with an exhaust passage 110 , and the first exhaust hole 107 and the second exhaust hole 108 communicate with the exhaust passage 110 respectively. The exhaust mechanism includes the first row The valve 33, the second exhaust valve 34 and the first driving device, the first exhaust valve 33 is provided in the first exhaust hole 107, the second exhaust valve 34 is provided in the second exhaust hole 108, the first driving device Drive-connected with the first exhaust valve 33 and the second exhaust valve 34, respectively. Specifically, the first exhaust valve 33 is provided in the first exhaust hole 107 in an openable and closable manner, the second exhaust valve 34 is provided in the second exhaust hole 108 in an openable and closable manner, and the first driving devices are respectively It is drivingly connected with the first exhaust valve 33 and the second exhaust valve 34. When the exhaust gas after combustion needs to be discharged, the first driving device drives the first exhaust valve 33 and the second exhaust valve 34 to open, and the cylinder bore The exhaust gas is discharged from the exhaust passage 110 through the first exhaust hole 107 and the second exhaust hole 108 respectively, so as to realize the full discharge of the exhaust gas after the combustion of the gas, and avoid the mixture of the exhaust gas and the unburned gas causing the unburned gas not to be fully burned. The problem.

Further, as shown in FIGS. 1 to 3 , the cylinder head 10 is provided with a first intake passage 111 and a second intake passage, the first intake passage 111 communicates with the first intake hole 101 , and the second intake passage The passage communicates with the second intake hole 102 , the intake mechanism 30 includes a first intake valve 31 , a second intake valve 32 and a second driving device 35 , the first intake valve 31 is arranged in the first intake hole 101 , The second intake valve 32 is provided in the second intake hole 102 , and the second driving device 35 is respectively drivingly connected to the first intake valve 31 and the second intake valve 32 . Specifically, the first intake passage 111 is communicated with the first intake hole 101 , the second intake passage is communicated with the second intake hole 102 , and the first intake valve 31 is provided in the first intake air in an openable and closable manner. Hole 101, the second intake valve 32 is provided in the second intake hole 102 in an openable and closable manner. When intake air is required, the first driving device drives the first intake valve 31 and the second intake valve 32 respectively, The first intake valve 31 and the second intake valve 32 are opened respectively, the gas in the first intake passage 111 enters through the first intake hole 101 , and the gas in the second intake passage passes through the second intake hole 102 When entering, the two incoming airflows are blocked by the protruding structures 103 on the inner wall surface of the inner groove 109 , thereby ensuring the speed of the airflow entering the inner groove 109 . In addition, through the first intake valve 31 , the second intake valve 32 and the second driving device 35 , the control of the intake air of the gas engine is effectively realized, thereby ensuring the stable and efficient operation of the gas engine.

It should be pointed out that the gas transported into the inner groove 109 through the first intake passage 111 performs a vortex motion in the inner groove 109 and the cylinder bore, and the gas transported into the inner groove 109 through the second intake passage is in the The tumble motion is carried out in the inner groove 109 and the cylinder hole. When the two air flows are mixed in the inner groove 109 and the cylinder hole, the air flow formed has both vortex motion and tumble motion, thereby ensuring the full mixing of the gas, thereby ensuring The gas is fully burned, which improves the combustion efficiency.

It should be pointed out that the raised structure 103 is disposed close to one side of the first air inlet 101 , thereby avoiding the influence of the raised structure 103 on the tumble flow formed by the gas entering through the second air inlet 102 , and further ensuring that speed of air flow.

Further, as shown in FIGS. 1 to 3 , the first intake passage 111 is a spiral intake passage. Specifically, the spiral intake port is provided in the cylinder head 10 , and the gas rotates when passing through the spiral intake port, and the spiral intake port is communicated with the first intake hole 101 , so that the gas entering through the first intake hole 101 The vortex motion occurs in the inner groove 109 and the cylinder bore, thereby increasing the air flow speed and avoiding the problems of knocking and excessive exhaust temperature in the gas engine.

Specifically, the second intake port is a tangential intake port. The second intake passage is communicated with the second intake hole 102 . The second intake passage is a tangential intake passage arranged along the tangential direction of the cylinder bore. After the gas enters through the tangential intake passage, the gas enters the inner groove. 109 and the tumble motion in the cylinder bore, thereby ensuring the flow speed of the gas, improving the combustion efficiency of the gas, and further avoiding the problems of knocking and excessive exhaust temperature in the gas engine.

Specifically, as shown in FIG. 1 , the second driving device 35 has a variable lift structure. Using the variable lift structure of the second driving device 35 to cooperate with the helical intake port, the tumble flow intensity can be adjusted according to the change of the working conditions. The protruding structure 103 can adjust the intensity of the tumble flow, thereby meeting the use requirements of the gas engine in different working conditions.

The present invention also provides a gas engine, and the gas engine includes the gas engine combustion system 100 as above.

Specifically, in the gas engine combustion system 100 of the gas engine, the protruding structure 103 is arranged on the inner wall surface of the inner groove 109 and is located between the first air intake hole 101 and the second air intake hole 102. When the combustion system starts When the piston 20 moves in the direction away from the inner groove 109 along the cylinder hole, the gas enters the space formed by the inner groove 109 and the cylinder hole through the first air inlet hole 101 and the second air inlet hole 102 respectively, and the piston 20 re-enters the space formed by the inner groove 109 and the cylinder hole. Moving towards the direction close to the inner groove 109, when the piston 20 reaches the top dead center of its motion, the gas is pressed into the inner groove 109, and the compressed gas in the inner groove 109 is ignited to provide power for the engine. When the gas enters through the first air inlet hole 101 and the second air inlet hole 102 respectively, since the protruding structure 103 is arranged between the first air inlet hole 101 and the second air inlet hole 102, the interference of the two air flows is avoided. Therefore, the flow speed of the gas is ensured, so that the combustion speed after the gas is ignited is guaranteed, thereby avoiding the problems of knocking and excessive exhaust temperature of the gas engine.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Substitutions should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

A temperature control system for a battery pack of a new energy vehicle, comprising a controller, characterized in that the temperature control system further comprises a power supply, a heating element, a temperature measurement component and a control component electrically connected to the controller respectively;

The temperature measuring component is used to collect the external ambient temperature of the battery box and the current temperature of the power battery;

The control assembly is used to control the communication between the battery box and the cab or the communication between the battery box and the outside world;

The heating element is used for heating inside the battery box;

The controller controls the communication between the battery box and the cab or the communication between the battery box and the outside world according to the external ambient temperature and the current temperature of the power battery.

Claims (9)

1. A gas engine combustion system, characterized in that it comprises:

the cylinder cover assembly comprises a cylinder cover, and an air inlet mechanism and an air outlet mechanism which are respectively arranged on the cylinder cover, wherein the cylinder cover is provided with an inner groove, a first air inlet hole, a second air inlet hole and a protruding structure, the first air inlet hole and the second air inlet hole are respectively communicated with the inner groove, the protruding structure is arranged on the inner wall surface of the inner groove and is positioned between the first air inlet hole and the second air inlet hole, and the protruding structure is close to one side of the first air inlet hole; the cylinder cover is further provided with a first exhaust hole, a second exhaust hole and a groove structure, the first exhaust hole and the second exhaust hole are respectively communicated with the inner groove, the groove structure comprises a first groove part, and the first groove part is arranged on the inner wall surface of the inner groove and is positioned between the first exhaust hole and the second exhaust hole;

the cylinder body is provided with a cylinder hole, the piston is movably arranged in the cylinder hole, the cylinder cover is matched with the cylinder body, and the inner groove is correspondingly arranged with the cylinder hole.

2. The gas engine combustion system as recited in claim 1, wherein said projection structure extends toward a direction of said cylinder bore.

3. A gas engine combustion system as claimed in claim 1, wherein the outer surface of the convex structure is a circular arc surface.

4. A gas engine combustion system as set forth in claim 1, wherein a second groove portion is further provided in said cylinder head, said second groove portion being provided on an inner wall surface of said inner groove and being located between said first intake port and said first exhaust port.

5. A gas engine combustion system as set forth in claim 1, wherein a third groove portion is further provided in said cylinder head, said third groove portion being provided on an inner wall surface of said inner groove and being located between said second intake port and said second exhaust port.

6. The gas engine combustion system as claimed in claim 1, wherein an exhaust passage is provided in said cylinder head, and said first exhaust hole and said second exhaust hole are respectively communicated with said exhaust passage;

the exhaust mechanism comprises a first exhaust valve, a second exhaust valve and a first driving device, the first exhaust valve is arranged in the first exhaust hole, the second exhaust valve is arranged in the second exhaust hole, and the first driving device is respectively connected with the first exhaust valve and the second exhaust valve in a transmission mode.

7. The gas engine combustion system as claimed in claim 1, wherein a first intake passage and a second intake passage are provided in said cylinder head, said first intake passage communicating with said first intake port, said second intake passage communicating with said second intake port;

the air inlet mechanism comprises a first air inlet valve, a second air inlet valve and a second driving device, the first air inlet valve is arranged on the first air inlet hole, the second air inlet valve is arranged on the second air inlet hole, and the second driving device is respectively in transmission connection with the first air inlet valve and the second air inlet valve.

8. The gas engine combustion system as recited in claim 7, wherein said first intake passage is a helical intake;

and/or the second air inlet channel is a tangential air inlet channel;

and/or the second drive means is a lift variable structure.

9. A gas engine characterized in that it comprises a gas engine combustion system as claimed in any one of claims 1 to 8.

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