CN111140342B - Gas engine combustion system and gas engine with same - Google Patents
Gas engine combustion system and gas engine with same Download PDFInfo
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- CN111140342B CN111140342B CN202010262965.3A CN202010262965A CN111140342B CN 111140342 B CN111140342 B CN 111140342B CN 202010262965 A CN202010262965 A CN 202010262965A CN 111140342 B CN111140342 B CN 111140342B
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- air inlet
- hole
- exhaust
- cylinder
- gas engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
- F02B43/02—Engines characterised by means for increasing operating efficiency
- F02B43/04—Engines characterised by means for increasing operating efficiency for improving efficiency of combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
- F02B31/04—Modifying induction systems for imparting a rotation to the charge in the cylinder by means within the induction channel, e.g. deflectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4235—Shape or arrangement of intake or exhaust channels in cylinder heads of intake channels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The invention discloses a gas engine combustion system and a gas engine with the same, the gas engine combustion system comprises a cylinder cover assembly, a cylinder body and a piston, the cylinder cover assembly comprises a cylinder cover body, and an air inlet mechanism and an exhaust mechanism which are respectively arranged on the cylinder cover body, the cylinder cover is provided with an inner groove, a first air inlet hole, a second air inlet hole and a bulge structure, the first air inlet hole and the second air inlet hole are respectively communicated with the inner groove, the bulge structure is arranged on the inner wall surface of the inner groove and positioned between the first air inlet hole and the second air inlet 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. When gas enters through the first air inlet hole and the second air inlet hole respectively, the protruding structure avoids interference of two air flows, the flowing speed and the burning speed of the gas are guaranteed, and the problems of knocking and overhigh exhaust temperature of a gas engine are avoided.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a gas engine combustion system. The invention also relates to an engine.
Background
This section provides background information related to the present disclosure only and is not necessarily prior art.
The natural gas does not contain C-C chains in combustion, so that the emission of soot generated in the combustion process is very low, and meanwhile, the carbon content proportion in the natural gas is low, and the carbon emission is lower than that of diesel oil and gasoline fuel when the same heat is emitted, so that the emission of the motor vehicle can be effectively controlled by adopting the natural gas as the fuel, and the method has important significance for relieving environmental pollution and reducing the carbon emission.
However, the propagation speed of the laminar flame of the natural gas is slow, so that the combustion speed of the gas engine is slow, and the problems of gas engine knocking and overhigh exhaust temperature are easy to occur.
Disclosure of Invention
The invention aims to at least solve the problems that the combustion speed of a gas engine is slow, the gas engine is easy to knock and the exhaust temperature is overhigh. The purpose is realized by the following technical scheme:
a first aspect of the invention proposes a gas engine combustion system comprising:
the cylinder cover assembly comprises a cylinder cover body, and an air inlet mechanism and an air outlet mechanism which are respectively arranged on the cylinder cover body, wherein an inner groove, a first air inlet hole, a second air inlet hole and a protruding structure are arranged on the cylinder cover, the first air inlet hole and the second air inlet hole are respectively communicated with the inner groove, and 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;
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 in the cylinder hole.
According to the gas engine combustion system, the bulge 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, when the combustion system is started, the piston moves towards the direction far away from the inner groove along the cylinder hole, gas enters a space formed by the inner groove and the cylinder hole through the first air inlet hole and the second air inlet hole respectively, the piston moves towards the direction close to the inner groove, when the piston reaches the top dead center of the movement of the piston, the gas is pressed into the inner groove, and the compressed gas in the inner groove is ignited, so that power is provided for the engine. When gas enters through the first air inlet hole and the second air inlet hole respectively, because the protruding structure is arranged between the first air inlet hole and the second air inlet hole, two air flows are prevented from interfering, the flowing speed of the gas is ensured, the burning speed of the ignited gas is ensured, and the problems of knocking and overhigh exhaust temperature of a gas engine are avoided.
In addition, the gas engine combustion system according to the present invention may also have the following additional technical features:
in some embodiments of the invention, the projection structure extends in the direction of the cylinder bore.
In some embodiments of the present invention, the outer surface of the convex structure is a circular arc surface.
In some embodiments of the present invention, the cylinder head further includes 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, and the groove structure includes a first groove portion, and the first groove portion is disposed on an inner wall surface of the inner groove and between the first exhaust hole and the second exhaust hole.
In some embodiments of the present invention, a second groove portion is further provided on the cylinder head, the second groove portion being provided on an inner wall surface of the inner groove and located between the first intake port and the first exhaust port.
In some embodiments of the present invention, a third groove portion is further provided on the cylinder head, and the third groove portion is provided on an inner wall surface of the inner groove and located between the second intake hole and the second exhaust 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 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.
In some embodiments of the present invention, a first air intake passage and a second air intake passage are provided on the cylinder head, the first air intake passage is communicated with the first air intake hole, and the second air intake passage is communicated with the second air intake hole;
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.
In some embodiments of the invention, the first intake passage is a helical intake;
and/or the second inlet is a tangential inlet;
and/or the second drive means is a lift variable structure.
A second aspect of the invention proposes a gas engine comprising a gas engine combustion system as described above.
According to the gas engine of the invention, in the gas engine combustion system of the gas engine, the bulge 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, when the combustion system is started, the piston moves towards the direction far away from the inner groove along the cylinder hole, 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, the piston moves towards the direction close to the inner groove, when the piston reaches the top dead center of the movement of the piston, the gas is pressed into the inner groove, and the gas compressed in the inner groove is ignited, so that power is provided for the engine. When gas enters through the first air inlet hole and the second air inlet hole respectively, because the protruding structure is arranged between the first air inlet hole and the second air inlet hole, two air flows are prevented from interfering, the flowing speed of the gas is ensured, the burning speed of the ignited gas is ensured, and the problems of knocking and overhigh exhaust temperature of a gas engine are avoided.
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 only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
fig. 1 schematically shows a schematic structural view of a gas engine combustion system according to an embodiment of the present invention;
FIG. 2 is a schematic block diagram of a cylinder head assembly of the combustion system of the gas engine shown in FIG. 1 (only a partial structure is shown);
fig. 3 is a schematic structural view of the cylinder head assembly shown in fig. 2 from another perspective.
The reference numbers are as follows:
100 is a gas engine combustion system;
10 is a cylinder cover;
101 is a first air inlet, 102 is a second air inlet, 103 is a convex structure, 104 is a first groove part, 105 is a second groove part, 106 is a third groove part, 107 is a first air outlet, 108 is a second air outlet, 109 is an inner groove, 110 is an air outlet channel, and 111 is a first air inlet channel;
20 is a piston;
Detailed Description
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 to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the 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" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. 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 limited by these terms. These terms may be only 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 the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to 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 "over" the other elements or features. Thus, the example term "below … …" can include 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 fig. 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, the cylinder head assembly includes a cylinder head 10 body, and an intake mechanism 30 and an exhaust mechanism respectively disposed 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 protrusion structure 103, the first intake hole 101 and the second intake hole 102 are respectively communicated with the inner groove 109, the protrusion structure 103 is disposed on an inner wall surface of the inner groove 109 and located between the first intake hole 101 and the second intake hole 102, the cylinder block is provided with a cylinder hole, the piston cylinder hole 20 is movably disposed in the cylinder hole, the cylinder head 10 is engaged with the cylinder block, and the inner groove 109 is disposed corresponding.
Specifically, the convex structure 103 is arranged on the inner wall surface of the inner groove 109 and located between the first air inlet hole 101 and the second air inlet hole 102, when the combustion system is started, the piston 20 moves towards the direction far away from the inner groove 109 along the cylinder hole, 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, the piston 20 moves towards the direction close to the inner groove 109, when the piston 20 reaches the top dead center of the movement of the piston, the gas is pressed into the inner groove 109, power is provided for the engine by igniting the gas compressed in the inner groove 109, and the combusted waste gas is exhausted through the exhaust mechanism. When gas enters through the first air inlet hole 101 and the second air inlet hole 102 respectively, the protruding structure 103 is arranged between the first air inlet hole 101 and the second air inlet hole 102, so that interference of two air flows is avoided, the flowing speed of the gas is guaranteed, the burning speed of the ignited gas is guaranteed, and the problems of knocking and overhigh exhaust temperature of a gas engine are avoided.
It should be understood that the protrusion structure 103 is formed on the inner wall surface of the inner groove 109, the protrusion structure 103 is formed by the inner wall surface of the inner groove 109 arching towards the inner portion of the inner groove 109 and has a certain height, the first air inlet hole 101 and the second air inlet hole 102 are respectively arranged at two sides of the arching structure, when the gas entering through the first air inlet hole 101 and the second air inlet hole 102 is in the height range of the protrusion structure 103, the protrusion structure 103 separates the gas entering at two sides, the condition that the flow speed is reduced due to mutual turbulence is avoided, when the gas entering through the first air inlet hole 101 and the second air inlet hole 102 is out of the height range of the protrusion structure 103, the gas entering through the first air inlet hole 101 and the second air inlet hole 102 is mixed, thereby ensuring sufficient mixing of the gas and ensuring the combustion efficiency.
It should be noted that after the gas enters the space formed by the inner groove 109 and the cylinder bore through the first gas inlet hole 101 and the second gas inlet hole 102, the gas forms a vortex (an organized rotation motion of the gas around the axis of the cylinder bore) and a tumble (a motion of the gas flow in the cylinder bore, named as a motion of the vortex perpendicular to the axis of the cylinder bore) in the inner groove 109 and the cylinder bore, so that the flow speed of the gas is further ensured, and the problems of knocking and over-high exhaust temperature of the gas engine are avoided. In addition, in order to improve the wear resistance of the cylinder body, the cylinder sleeve is arranged in the cylinder hole, the piston is movably arranged in the cylinder sleeve, the cylinder sleeve and the cylinder body are of split structures, the cylinder sleeve and the cylinder body are respectively processed, and then the cylinder sleeve is arranged on the cylinder body, so that independent maintenance and replacement can be realized. In addition, in this application, the inner groove 109 is a dome structure, and the piston 20 is a squish piston, so that the squish effect on the gas is further ensured, and the gas flow velocity is further ensured.
It is further understood that the bump structures 103 extend in the direction of the cylinder bore, as shown in fig. 2 and 3. Specifically, the inner wall surface of the inner groove 109 is a concave arc surface and faces the cylinder hole, the first air inlet 101 and the second air inlet 102 are respectively arranged at positions on two sides of the protruding structure 103, so that the first air inlet 101 and the second air inlet 102 are inclined to the axis direction of the cylinder hole, the gas entering direction into the inner groove 109 through the first air inlet 101 and the second air inlet 102 is inclined to the axis direction of the cylinder hole, the protruding structure 103 extends towards the direction of the cylinder hole, two side surfaces of the protruding structure 103 respectively block the gas entering through the first air inlet 101 and the second air inlet 102, the interference of two gas flows is effectively avoided, the gas flow rate entering the inner groove 109 and the air flow rate in the cylinder hole is ensured, and the combustion rate is further ensured.
It should be noted that the diameters of the first air inlet hole 101 and the second air inlet hole 102 are equal, the width of the protrusion structure 103 is greater than or equal to the radius of the first air inlet hole 101, and a connecting line between the hole centers of the first air inlet hole 101 and the second air inlet hole 102 vertically passes through the middle position of the protrusion structure 103, so that the blocking of the air flow on the two sides of the protrusion structure 103 is further ensured, and the air inlet speed is ensured.
Further, as shown in fig. 2 and 3, the outer surface of the convex structure 103 is a circular arc surface. Specifically, the outer surface of the convex structure 103 is set to be a circular arc surface, so that the friction between gas and the convex structure 103 is reduced, the influence of the convex structure 103 on the gas flow speed is reduced, the combustion rate is ensured, and the problems of knocking and overhigh exhaust temperature of the gas engine are solved.
It should be noted that the cross section of the boss structure 103 in the axial direction of the cylinder bore is approximately elliptical, and the airflow flows along the outer edge of the elliptical structure, further reducing the influence of the boss structure 103 on the airflow speed, so that the speed of intake air is ensured.
Further, as shown in fig. 2 and 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 communicated with the inner groove 109, the groove structure includes a first groove portion 104, and the first groove portion 104 is disposed on an inner wall surface of the inner groove 109 and 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 used for discharging combusted exhaust gas, the first groove portion 104 is arranged on the inner wall surface between the first exhaust hole 107 and the second exhaust hole 108, when the piston 20 runs to the top dead center of the cylinder hole, compressed gas enters the first groove portion 104, the gas is in a moving state in the first groove portion 104, the gas flow velocity is further ensured, the combustion rate is improved, and then the problems of knocking and over-high exhaust temperature of the gas engine are avoided. 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 for compressing gas, the compressed gas is in a vortex motion, the vortex motion of the gas is enhanced by providing the first groove portion 104 on the inner wall surface of the inner groove 109, and after the gas is ignited, the propagation speed and the thermal efficiency of flame in the later combustion stage are improved, and the emission is reduced.
It should be noted that, the inner wall surface of the inner groove 109 is recessed to form a groove structure, the surface of the first groove portion 104 of the groove structure is a first arc-shaped surface, and by setting the surface of the first groove portion 104 as the first arc-shaped surface, the influence of the surface of the first groove portion 104 on the air flow is reduced, the air flow speed is ensured, and the problems of knocking and over-high exhaust temperature of the gas engine are avoided.
In addition, the first air inlet hole 101, the second air inlet hole 102, the first exhaust hole 107 and the second exhaust hole 108 are arranged on the inner wall surface of the inner groove 109 at intervals, meanwhile, the first air inlet hole 101 and the second air inlet hole 102 are arranged in a rectangular mode, the first exhaust hole 107 and the second exhaust hole 108 are arranged in an adjacent mode, and therefore air inlet and exhaust stability of the engine is guaranteed.
Further, as shown in fig. 2 and 3, the cylinder head 10 is further provided with a second groove portion 105, and the second groove portion 105 is provided on an inner wall surface of the inner groove 109 and is located between the first intake port 101 and the first exhaust port 107. Specifically, the second groove portion 105 is provided between the first intake hole 101 and the second exhaust hole 108, and when the piston 20 travels along the cylinder hole to its top dead center, the compressed gas enters the first groove portion 104 and the second groove portion 105, and the gas is in motion in both the first groove portion 104 and the second groove portion 105, so that the gas flow velocity is further ensured, the combustion rate is increased, and the problems of knocking and excessive exhaust temperature of the gas engine are avoided.
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 for compressing gas, the compressed gas is in a vortex motion, and the vortex motion of the gas is enhanced by providing the first groove portion 104 and the second groove portion 105 on the inner wall surface of the inner groove 109, so that when the gas is ignited, the flame propagation speed and the thermal efficiency in the later combustion period 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, and by setting the surface of the second groove portion 105 as the second arc-shaped surface, the influence of the surface of the second groove portion 105 on the air flow is reduced, the air flow velocity is ensured, and the problems of knocking and excessive exhaust temperature of the gas engine are avoided.
Further, as shown in fig. 2 and 3, the cylinder head 10 is further provided with a third groove portion 106, and the third groove portion 106 is provided on an inner wall surface of the inner groove 109 and is located between the second intake port 102 and the second exhaust port 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 moves to its top dead center along the cylinder hole, the compressed gas enters the first groove portion 104, the second groove portion 105 and the third groove portion 106, and the gas is in motion in the first groove portion 104, the second groove portion 105 and the third groove portion 106, so as to further ensure the gas flow velocity, improve the combustion rate, and further avoid the problems of knocking and over-high exhaust temperature of 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 for compressing gas, the compressed gas is in a vortex motion, and the vortex motion of the gas is enhanced by providing the first groove portion 104, the second groove portion 105 and the third groove portion 106 on the inner wall surface of the inner groove 109, so that after the gas is ignited, the propagation speed and the thermal efficiency of flame in the later combustion stage are improved, and the discharge is reduced.
It is to be noted 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, and by setting the surface of the third groove portion 106 to be the third arc-shaped surface, the influence of the surface of the third groove portion 106 on the air flow is reduced, the air flow velocity is ensured, and the problems of knocking and excessive exhaust temperature of the gas engine are avoided.
Further, as shown in fig. 2 and fig. 3, an exhaust passage 110 is provided on the cylinder head 10, the exhaust mechanism, in which the first exhaust port 107 and the second exhaust port 108 are respectively communicated with the exhaust passage 110, includes a first exhaust valve 33, a second exhaust valve 34 and a first driving device, the first exhaust valve 33 is provided in the first exhaust port 107, the second exhaust valve 34 is provided in the second exhaust port 108, and the first driving device is in transmission connection with the first exhaust valve 33 and the second exhaust valve 34, respectively. Specifically, the first exhaust valve 33 is arranged in the first exhaust hole 107 in an openable and closable manner, the second exhaust valve 34 is arranged in the second exhaust hole 108 in an openable and closable manner, the first driving device is in transmission connection with the first exhaust valve 33 and the second exhaust valve 34 respectively, when exhaust gas after combustion needs to be exhausted, the first driving device drives the first exhaust valve 33 and the second exhaust valve 34 to be opened, and exhaust gas in a cylinder hole is exhausted out of the exhaust channel 110 through the first exhaust hole 107 and the second exhaust hole 108 respectively, so that sufficient exhaust of the exhaust gas after gas combustion is realized, and the problem that the unburned gas cannot be sufficiently combusted due to mixing of the exhaust gas and the unburned gas is avoided.
Further, as shown in fig. 1 to fig. 3, a first air intake channel 111 and a second air intake channel are provided on the cylinder head 10, the first air intake channel 111 is communicated with the first air intake hole 101, the second air intake channel is communicated with the second air intake hole 102, the air intake mechanism 30 includes a first air intake valve 31, a second air intake valve 32 and a second driving device 35, the first air intake valve 31 is provided on the first air intake hole 101, the second air intake valve 32 is provided on the second air intake hole 102, and the second driving device 35 is in transmission connection with the first air intake valve 31 and the second air intake valve 32 respectively. Specifically, a first air inlet channel 111 is communicated with a first air inlet hole 101, a second air inlet channel is communicated with a second air inlet hole 102, a first air inlet valve 31 is arranged on the first air inlet hole 101 in an openable and closable mode, a second air inlet valve 32 is arranged on the second air inlet hole 102 in an openable and closable mode, when air needs to be introduced, a first driving device drives the first air inlet valve 31 and the second air inlet valve 32 respectively, the first air inlet valve 31 and the second air inlet valve 32 are opened respectively, air in the first air inlet channel 111 enters through the first air inlet hole 101, air in the second air inlet channel enters through the second air inlet hole 102, and the two entering air flows are blocked by a convex structure 103 on the inner wall surface of the inner groove 109, so that the air flow speed entering the inner groove 109 is guaranteed. In addition, the first intake valve 31, the second intake valve 32 and the second driving device 35 effectively realize the control of the air intake of the gas engine, thereby ensuring the stable and efficient operation of the gas engine.
It should be pointed out that, carry out the vortex motion in recess 109 and the cylinder hole through the gas that first inlet channel 111 carried to inner groove 109, carry out the tumble motion in recess 109 and the cylinder hole through the air current that second inlet channel carried to inner groove 109, the existing vortex motion of air current that forms after two air currents mix in recess 109 and the cylinder hole also has the tumble motion, thereby guaranteed the intensive mixing of gas, and then guarantee that gas combustion is abundant, make combustion efficiency obtain improving.
It should be noted that the protrusion 103 is disposed near one side of the first air inlet hole 101, so as to avoid the protrusion 103 from affecting the tumble flow formed by the gas entering through the second air inlet hole 102, and further ensure the speed of the gas flow.
Further, as shown in fig. 1 to 3, the first intake passage 111 is a helical intake passage. Specifically, in cylinder cap 10 was located to the helical inlet, rotary motion took place when gaseous process helical inlet, and the helical inlet communicates with first inlet port 101 to make the gaseous vortex motion takes place in inner groove 109 and the cylinder hole including the gas that gets into through first inlet port 101, and then improved air speed, avoided gas engine to appear knocking and the too high problem of exhaust temperature.
Specifically, the second inlet is a tangential inlet. The second air inlet channel is communicated with the second air inlet hole 102, the second air inlet channel is a tangential air inlet channel arranged along the tangential direction of the cylinder hole, and after air enters through the tangential air inlet channel, the air generates tumble motion in the inner groove 109 and the cylinder hole, so that the flowing speed of the air is ensured, the combustion efficiency of the air is improved, and the problems of knocking and overhigh exhaust temperature of the air engine are further avoided.
Specifically, as shown in fig. 1, the second driving device 35 is a lift variable structure. The lift variable structure of the second driving device 35 is matched with the spiral air inlet channel to adjust the tumble strength according to the change of the working condition, and the lift variable structure of the second driving device 35 is matched with the convex structure 103 of the inner groove 109 of the cylinder cover 10, so that the tumble strength is adjusted, and the use requirements of the gas engine under different working conditions are met.
The invention also provides a gas engine, which comprises the gas engine combustion system 100.
Specifically, in the gas engine combustion system 100 of the gas engine, the convex structure 103 is arranged on the inner wall surface of the inner groove 109 and between the first intake hole 101 and the second intake hole 102, when the combustion system is started, the piston 20 moves in the direction away from the inner groove 109 along the cylinder hole, gas enters the space formed by the inner groove 109 and the cylinder hole through the first intake hole 101 and the second intake hole 102, the piston 20 moves in the direction close to the inner groove 109, when the piston 20 reaches the top dead center of the movement, the gas is pressed into the inner groove 109, and the gas compressed in the inner groove 109 is ignited, so that power is provided for the engine. When gas enters through the first air inlet hole 101 and the second air inlet hole 102 respectively, the protruding structure 103 is arranged between the first air inlet hole 101 and the second air inlet hole 102, so that interference of two air flows is avoided, the flowing speed of the gas is guaranteed, the burning speed of the ignited gas is guaranteed, and the problems of knocking and overhigh exhaust temperature of a gas engine are avoided.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
The temperature control system of the new energy automobile battery pack comprises a controller and is characterized by further comprising a power supply, a heating element, a temperature measuring component and a control component, wherein the power supply, the heating element, the temperature measuring component and the control component are respectively and electrically connected with the controller;
the temperature measuring assembly is used for collecting the external environment temperature of the battery box and the current temperature of the power battery;
the control assembly is used for controlling the battery box to be communicated with the cab or the battery box to be communicated with the outside;
the heating element is used for heating the interior of the battery box;
and the controller controls the battery box to be communicated with the cab or the battery box to be communicated with the outside according to the external environment 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010262965.3A CN111140342B (en) | 2020-04-07 | 2020-04-07 | Gas engine combustion system and gas engine with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010262965.3A CN111140342B (en) | 2020-04-07 | 2020-04-07 | Gas engine combustion system and gas engine with same |
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| CN111140342A CN111140342A (en) | 2020-05-12 |
| CN111140342B true CN111140342B (en) | 2020-11-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115898623A (en) * | 2022-11-27 | 2023-04-04 | 赛力斯集团股份有限公司 | Combustion system beneficial to improving heat efficiency of engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1018078B (en) * | 1987-11-17 | 1992-09-02 | 丰田自动车株式会社 | Two stroke engine |
| JPH0733766B2 (en) * | 1988-08-30 | 1995-04-12 | トヨタ自動車株式会社 | Combustion chamber of internal combustion engine |
| KR102169031B1 (en) * | 2013-09-25 | 2020-10-22 | 가부시끼 가이샤 구보다 | Intake System for Engine |
| CN104234818B (en) * | 2014-09-18 | 2018-04-10 | 石建民 | A kind of two-stroke internal combustion engine |
| CN106884733A (en) * | 2017-04-14 | 2017-06-23 | 无锡开普机械有限公司 | Air inlet guide frame of the air intake duct in cylinder cover bottom surface |
| CN209586530U (en) * | 2019-01-03 | 2019-11-05 | 广西玉柴机器股份有限公司 | A kind of fire chamber of natural gas engine |
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