CN214616786U - Prechamber device and engine of intake pipe gas cooling - Google Patents
Prechamber device and engine of intake pipe gas cooling Download PDFInfo
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- CN214616786U CN214616786U CN202120891394.XU CN202120891394U CN214616786U CN 214616786 U CN214616786 U CN 214616786U CN 202120891394 U CN202120891394 U CN 202120891394U CN 214616786 U CN214616786 U CN 214616786U
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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
Abstract
The utility model belongs to the technical field of engines, in particular to a prechamber device for gas cooling of an air inlet pipe and an engine, wherein the prechamber device comprises a cylinder cover, an air inlet valve guide pipe, an air inlet pipe, a prechamber body and a gas connecting pipe, and the cylinder cover is provided with an air inlet passage and an air inlet valve guide pipe mounting hole; a connecting channel is arranged between the inlet valve guide pipe and the rod body of the inlet valve, a cylinder cover air entraining channel and a cylinder cover gas channel are further arranged on the cylinder cover, and a gas connecting pipe is connected between the inlet pipe and the inlet of the cylinder cover air entraining channel. The pre-combustion chamber body is also provided with a pre-combustion chamber cooling channel extending from the middle part to the bottom part of the pre-combustion chamber body, the upper end of the pre-combustion chamber cooling channel is communicated with the cylinder cover gas channel, and the lower end of the pre-combustion chamber cooling channel is communicated with the main combustion chamber. The utility model discloses well gas flows through precombustion chamber cooling channel in proper order, cools off the precombustion chamber body, reduces the heat load of precombustion chamber, prevents the fracture and the ablation problem that the precombustion chamber body leads to because the heat load is high.
Description
Technical Field
The utility model belongs to the technical field of the engine, especially, relate to a prechamber device and engine of intake pipe gas cooling.
Background
With the increasingly stringent fuel consumption regulations, engine ultra-high thermal efficiency is a sought goal. The combustion speed is accelerated, the isochoricity is improved, the heat dissipation loss is reduced, and meanwhile, the detonation is inhibited, so that the method is an effective means for improving the heat-work conversion efficiency of the engine. Jet ignition in the precombustion chamber can improve the combustion speed, inhibit detonation and expand the lean-burn limit, and has certain potential in the aspect of improving the heat efficiency of the engine. The jet ignition of the precombustion chamber firstly ignites the mixed gas in the cavity of the precombustion chamber, and the high-temperature and high-pressure mixed gas is sprayed to the main combustion chamber through the small holes to form high-speed jet flame, so that the ignition area is greatly increased, and the combustion speed is improved. On the other hand, unburned intermediates in the precombustor can also accelerate the combustion process.
The inner wall surface of the precombustion chamber body near the jet hole of the precombustion chamber is contacted with combustion gas in the precombustion chamber, the outer wall surface is contacted with the combustion gas in the main combustion chamber, and high-temperature gas transfers heat to the precombustion chamber body to increase the temperature of the precombustion chamber body. The heat of the precombustion chamber body can be transferred to the cylinder cover at the contact part of the precombustion chamber body and the cylinder cover in a heat conduction mode. However, in the area near the jet hole of the precombustion chamber on the side wall of the precombustion chamber, one surface of the jet hole is heated by high-temperature gas in the main combustion chamber, the other surface of the jet hole is heated by high-temperature gas in the precombustion chamber, the jet hole of the precombustion chamber is not provided with a special cooling structure, and the heat of the jet hole can be transferred to the area of the low-temperature wall surface of the precombustion chamber body contacted with a cylinder cover only in a heat conduction mode. Due to the limitation of thermal conductivity, the thermal load of the part of the structure is very high, and cracking and ablation problems are easily caused.
In the existing patent, the cooling mode of the prechamber body is that a brand new cooling water loop is additionally arranged on a cylinder cover, and the prechamber body is cooled by using cooling water of an engine cylinder cover, but the cooling water loop needs to be additionally arranged on the cylinder cover, so that very high requirements are provided for the design of the cylinder cover cooling loop, particularly for an engine with a small cylinder diameter. Furthermore, the cooling water has no way of cooling the wall surface in the vicinity of the jet holes of the prechamber, which is very thermally loaded.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: aiming at the problem of high heat load of the body of the precombustion chamber in the existing engine, the precombustion chamber device for cooling the gas in the air inlet pipe and the engine are provided.
In order to solve the technical problem, on the one hand, the utility model provides a prechamber device of intake pipe gas cooling, including cylinder cap, (air) intake valve, air intake valve pipe, intake pipe, prechamber body and gas connecting pipe, be provided with on the cylinder cap and be used for installing the prechamber mounting hole of prechamber body, the inside of prechamber body forms the prechamber inner chamber, the bottom of prechamber body is equipped with the prechamber jet orifice that communicates the prechamber inner chamber with the main combustion chamber of engine;
the cylinder cover is provided with an air inlet channel and an air inlet valve guide pipe mounting hole, the outer end of the air inlet channel is communicated with the air inlet pipe, the inner end of the air inlet channel is communicated with a main combustion chamber of an engine, the air inlet valve guide pipe is mounted in the air inlet valve guide pipe mounting hole, and the air inlet valve is inserted in the air inlet valve guide pipe in a sliding manner; a connecting channel is arranged between the inlet valve guide pipe and the rod body of the inlet valve, a cylinder cover air entraining channel and a cylinder cover gas channel are also arranged on the cylinder cover, and the gas connecting pipe is connected between the air inlet pipe and an inlet of the cylinder cover air entraining channel;
the pre-combustion chamber body is also provided with a pre-combustion chamber cooling channel extending from the middle part to the bottom part of the pre-combustion chamber body, the upper end of the pre-combustion chamber cooling channel is communicated with a cylinder cover gas channel, and the lower end of the pre-combustion chamber cooling channel is communicated with a main combustion chamber of an engine;
and the connecting channel is communicated with an outlet of the cylinder cover air entraining channel and an inlet of the cylinder cover gas channel when the intake valve is opened.
Optionally, encircle on the cylinder head the precombustion chamber body is provided with precombustion chamber mounting hole annular groove, precombustion chamber mounting hole annular groove with cylinder head gas passage's export intercommunication, precombustion chamber cooling passage encircles the precombustion chamber body is provided with a plurality ofly, and is a plurality of the upper end of precombustion chamber cooling passage with precombustion chamber mounting hole annular groove intercommunication, it is a plurality of the lower extreme of precombustion chamber cooling passage all communicates with the main combustion chamber of engine.
Optionally, the prechamber injection holes are arranged in a plurality around the bottom of the prechamber body, each prechamber injection hole being located between two adjacent prechamber cooling channels in the circumferential direction.
Optionally, the prechamber device of intake pipe gas cooling still is including setting up throttle valve in the intake pipe, be provided with in the intake pipe with the reposition of redundant personnel mouth of gas connecting pipe intercommunication, the throttle valve is located on the gas flow direction the reposition of redundant personnel mouth with between the outer end of intake duct.
Optionally, the prechamber device for reducing the temperature of the intake pipe gas further comprises an exhaust valve and an exhaust valve guide pipe, the cylinder cover is further provided with an exhaust passage and an exhaust valve guide pipe mounting hole, the inner end of the exhaust passage is communicated with a main combustion chamber of the engine, the exhaust valve guide pipe is mounted in the exhaust valve guide pipe mounting hole, and the exhaust valve is inserted in the exhaust valve guide pipe in a sliding manner.
Optionally, the prechamber mounting hole is located between the intake valve and the exhaust valve and directly above a main combustion chamber of the engine; the upper end of the precombustion chamber body is provided with a precombustion chamber fuel injector mounting hole and a precombustion chamber spark plug mounting hole;
the precombustion chamber mounting hole is a stepped round hole, the precombustion chamber body is a stepped round pipe, the peripheral surface of the stepped round pipe is matched with the shape of the stepped round hole, and the precombustion chamber body is pressed in the precombustion chamber mounting hole.
Optionally, the connecting passage blocks an outlet of the cylinder head bleed air passage and an inlet of the cylinder head gas passage when the intake valve is closed.
Optionally, an air inlet ring groove and an air guide ring groove are arranged on the air inlet valve guide pipe at intervals, the air guide ring groove is located below the air inlet ring groove, the air inlet ring groove is communicated with an outlet of the cylinder cover air guide channel, the air guide ring groove is communicated with an inlet of the cylinder cover air guide channel, an air inlet valve rod ring groove is arranged on the periphery of a rod body of the air inlet valve, and the air inlet ring groove, the air inlet valve rod ring groove and the air guide ring groove form the connecting channel;
when the intake valve is opened, the intake valve rod ring groove is communicated with the intake ring groove and the air guide ring groove.
Optionally, the air inlet ring groove and the air guide ring groove are blocked by a rod body of the air inlet valve when the air inlet valve is closed.
On the other hand, the utility model provides an engine, including cylinder body, piston, sprayer and as before the gaseous prechamber device of cooling down of intake pipe, the cylinder cap is fixed on the cylinder body, be provided with the cylinder on the cylinder body, the piston slides and sets up in the cylinder, form main combustion chamber between the top surface of piston and the bottom of prechamber body, the sprayer is installed on the cylinder cap, be used for to intake duct or main combustion chamber oil spout.
The utility model discloses in, when the (air) intake valve was opened, gas connection pipe, cylinder cap bleed air passageway, connecting channel and cylinder cap gas passage communicate in proper order, introduce gas in the precombustion chamber cooling channel, gas flows through behind the precombustion chamber cooling channel, follow in the lower extreme discharge of precombustion chamber cooling channel main combustion chamber of engine, gas is taken away the heat of precombustion chamber body reduces the heat load of precombustion chamber body, prevents the cracking and the ablation problem of precombustion chamber body because the heat load height leads to. The pre-combustion chamber cooling channel capable of allowing gas to flow is formed in the side wall of the pre-combustion chamber body, so that a cold water loop can be prevented from being formed in a cylinder cover.
Drawings
Fig. 1 is a schematic view of a prechamber arrangement for intake duct gas cooling according to an embodiment of the present invention;
FIG. 2 is another schematic view of a prechamber arrangement with intake duct gas cooling according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a prechamber body according to an embodiment of the present invention.
The reference numerals in the specification are as follows:
1. a cylinder body; 2. a piston; 3. a cylinder cover; 31. an air inlet channel; 32. an exhaust passage; 33. a cylinder cover air entraining channel; 34. a pre-combustion chamber mounting hole; 35. a precombustion chamber mounting hole ring groove; 36. a cylinder head gas passage; 4. an intake valve; 40. an intake valve guide mounting hole; 41. an inlet valve guide; 42. an air inlet valve rod ring groove; 43. an air inlet ring groove; 44. a gas guide ring groove; 5. an exhaust valve; 51. an exhaust valve conduit; 52. an exhaust valve guide pipe mounting hole; 6. a prechamber body; 61. the inner cavity of the precombustion chamber; 62. a prechamber jet orifice; 63. a pre-combustion chamber fuel injector mounting hole; 64. a pre-chamber spark plug mounting hole; 65. a prechamber cooling channel; 7. an oil injector; 8. a main combustion chamber; 9. an air inlet pipe; 10. a throttle valve; 11. a gas connecting pipe.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to 3, on the one hand, an embodiment of the utility model provides a prechamber device of intake pipe gas cooling, including cylinder cap 3, (air) intake valve 4, intake valve pipe 41, intake pipe 9, prechamber body 6 and gas connecting pipe 11, be provided with on the cylinder cap 3 and be used for the installation prechamber mounting hole 34 of prechamber body 6, prechamber mounting hole 34 are ladder-shaped round hole structure, prechamber inner chamber 61 is formed to the inside of prechamber body 6, the bottom of prechamber body 6 is equipped with the intercommunication prechamber inner chamber 61 and the prechamber jet orifice 62 of the main combustion chamber 8 of engine, prechamber jet orifice 62 be used for with gas in prechamber inner chamber 61 discharges.
Be provided with intake duct 31 and intake valve pipe mounting hole 40 on the cylinder cap 3, the outer end of intake duct 31 with intake pipe 9 intercommunication, the inner of intake duct 31 communicates with the main combustion chamber 8 of engine, through intake duct 31 will high-pressure gas in the intake pipe 9 introduces in the main combustion chamber 8 of engine, intake valve pipe 41 installs in intake valve pipe mounting hole 40, intake valve 4 slides and pegs graft in intake valve pipe 41.
Be provided with interface channel between the body of rod of (air) intake valve pipe 41 and (air) intake valve 4, still be provided with cylinder cap bleed air passage 33 and cylinder cap gas passage 36 on the cylinder cap 3, gas connecting pipe 11 is connected between intake pipe 9 and the entry of cylinder cap bleed air passage 33.
The pre-combustion chamber body 6 is further provided with a pre-combustion chamber cooling channel 65 extending from the middle part to the bottom part of the pre-combustion chamber body 6, the upper end of the pre-combustion chamber cooling channel 65 is communicated with the cylinder head gas channel 36, and the lower end of the pre-combustion chamber cooling channel 65 is communicated with the main combustion chamber 8 of the engine. The prechamber cooling channel 65 is used to cool the prechamber body 6, to take away the heat of the prechamber body 6 and to reduce the heat load on the prechamber.
The utility model discloses in, when (air) intake valve 4 opened, gas connecting pipe 11, cylinder cap bleed air passageway 33, connecting channel and cylinder cap gas passageway 36 communicate in proper order, introduce gas in the precombustion chamber cooling channel 65, gas flows through after the precombustion chamber cooling channel 65, follow in the main combustion chamber 8 of engine is discharged to the lower extreme of precombustion chamber cooling channel 65, gaseous taking away the heat of precombustion chamber body 6 reduces the heat load of precombustion chamber body 6, prevents the fracture and the ablation problem that precombustion chamber body 6 leads to because the heat load is high. By providing the prechamber cooling passage 65 through which gas can flow on the side wall of the prechamber body 6, it is possible to avoid providing a separate cold water circuit on the cylinder head 3.
In one embodiment, the connecting channel communicates between the outlet of the head bleed air channel 33 and the inlet of the head gas channel 36 when the inlet valve 4 is open. Which blocks the outlet of the head bleed air channel 33 and the inlet of the head gas channel 36 when the inlet valve 4 is closed.
In an embodiment, an air inlet ring groove 43 and an air guide ring groove 44 are arranged on the air inlet valve guide pipe 41 at intervals, the air guide ring groove 44 is located below the air inlet ring groove 43, the air inlet ring groove 43 is communicated with an outlet of the cylinder head air guide channel 33, and the air guide ring groove 44 is communicated with an inlet of the cylinder head air channel 36. Be provided with air inlet valve pole annular 42 in the periphery of the body of rod of intake valve 4, when intake valve 4 opened, air inlet valve pole annular 42 intercommunication air inlet annular 43 and air guide ring groove 44, air inlet annular 43, air inlet valve pole annular 42 and air guide ring groove 44 communicate in proper order in order to form connect the passageway.
When the intake valve 4 is closed, the intake ring groove 43 and the air guide ring groove 44 are blocked by the rod body of the intake valve 4.
As shown in fig. 2, in an embodiment, the air inlet ring groove 43 and the air guide ring groove 44 are annular groove structures provided on the inner surface of the intake valve guide pipe 41, the annular grooves are formed to be recessed in a direction away from the intake valve guide pipe 41, the two ring grooves are spaced apart by a certain distance, and the air inlet valve 4 can be installed on the intake valve guide pipe 41 to be able to close the air inlet ring groove 43 and the air guide ring groove 44 into two annular spaces. Intake valve pole annular groove 42 is for setting up the annular groove structure of the surface of intake valve 4, intake valve pole annular groove 42 is for facing the direction of the center pin of intake valve 4 is sunken to form, intake valve 4 is installed can with behind the intake valve pipe 41 intake valve pole annular groove 42 seals to the annular space.
In an embodiment, the air inlet ring groove 43 and the air guide ring groove 44 are spaced apart from each other by a certain distance, and the air inlet valve 4 can be installed in the air inlet valve guide pipe 41 to close the air inlet ring groove 43 and the air guide ring groove 44 into two independent spaces. Intake valve pole annular 42 sets up on the body of rod of intake valve 4, intake valve 4 is installed can seal intake valve pole annular 42 behind the intake valve pipe 41, through intake valve 4 is in axial slip in the intake valve pipe 41, intake valve pole annular 42 can communicate or break intake valve ring groove 43 and air guide ring groove 44, intake valve ring groove 43 with intake duct 31 on the cylinder cap 3 communicates, and the gas can get into in intake duct 31 intake valve ring groove 43.
As shown in fig. 2, in an embodiment, the length of the intake valve rod ring groove 42 is greater than the distance between the intake ring groove 43 and the air guide ring groove 44, so that when the intake valve 4 is at different positions, the intake ring groove 43 and the air guide ring groove 44 can be communicated with each other, or can be disconnected from each other, and through a reasonable structural design, the intake ring groove 43 and the air guide ring groove 44 are communicated with each other in an intake stroke of the engine, that is, in a state where the intake valve 4 is opened, and the intake ring groove 43 and the air guide ring groove 44 are disconnected during other strokes.
The intake valve pipe 41 is a round pipe structure, one end of the intake valve 4 is a disc structure, the other end is a cylindrical rod body, and the intake ring groove 43 and the air guide ring groove 44 are formed on the intake valve pipe 41. When the (air) intake valve 4 is closed, the (air) intake valve pole annular groove 42 the (air) intake annular groove 43 with lead the gas annular groove 44 and stagger each other, the (air) intake valve pole annular groove 42 can't communicate the (air) intake annular groove 43 with lead the gas annular groove 44, be blocked between the export of cylinder cap bleed air passageway 33 and the entry of cylinder cap gas passageway 36.
In the present invention, in the intake stroke, the intake valve 4 is in the movement of the intake valve guide 41, the intake ring groove 43 and the air guide ring groove 44 are connected. The gas enters the prechamber cooling passage 65 through the gas connecting pipe 11, the cylinder head bleed air passage 33, the air inlet ring groove 43, the air inlet valve rod ring groove 42, the air guide ring groove 44 and the cylinder head gas passage 36, and cools the prechamber body 6. In other strokes, the inlet valve 4 is closed, the air inlet ring groove 43 and the air guide ring groove 44 are disconnected through reasonable design, and high-pressure mixed air and high-temperature and high-pressure waste gas in the main combustion chamber 8 are prevented from reversely flowing through the channels. Thus, the prechamber body 6 is cooled, and the problems of cracking and ablation of the prechamber due to high thermal load are prevented.
In an embodiment, an air inlet hole is opened on the intake valve guide tube 41 corresponding to the position of the air inlet ring groove 43, an air guide hole is opened on the intake valve guide tube 41 corresponding to the position of the air guide ring groove 44, the air inlet ring groove 43 and the cylinder head air guide channel 33 are connected through the air inlet hole, and the air guide ring groove 44 and the cylinder head air guide channel 36 are connected through the air guide hole. The air inlet holes penetrate through the inlet valve guide pipe 41, so that the air inlet ring groove 43 is communicated with the cylinder head bleed air channel 33, and the air in the air inlet pipe 9 can enter the air inlet ring groove 43. The gas-guide holes penetrate the intake valve guide pipe 41 to communicate the gas-guide ring groove 44 with the head gas passage 36, and gas in the gas-guide ring groove 44 can enter the head gas passage 36.
In an embodiment, the intake valve 4 and the intake valve guide 41 are installed on the cylinder head 3, the intake valve 4 is sleeved in the intake valve guide 41, and the intake valve 4 can slide in the intake valve guide 41 and move axially. Intake pipe 9 with intake duct 31 connects, by the gas that intake pipe 9 got into can pass through in proper order enter behind gas connection pipe 11, cylinder cap bleed air passageway 33, connecting channel and the cylinder cap gas passageway 36 in the precombustion chamber cooling passage 65, it is right the precombustion chamber body 6 cools down, gas in the intake pipe 9 can also pass through intake duct 31 gets into in the cylinder cap 3. The intake valve 4 is used for controlling the air current in the intake duct 31, when the intake valve 4 closes, the disc of intake valve 4 is sealing the intake duct 31 of cylinder head 3 for gas can't follow the intake duct 31 gets into in the main combustion chamber 8 of engine.
In an embodiment, the prechamber device for reducing the temperature of the intake air further includes an exhaust valve 5 and an exhaust valve guide pipe 51, the cylinder head 3 is further provided with an exhaust passage 32 and an exhaust valve guide pipe mounting hole 52, the inner end of the exhaust passage 32 is communicated with a main combustion chamber 8 of an engine, the exhaust valve guide pipe 51 is mounted in the exhaust valve guide pipe mounting hole 52, the exhaust valve 5 is inserted in the exhaust valve guide pipe 51 in a sliding manner, and the exhaust valve 5 can move axially in the exhaust valve guide pipe 51. The exhaust valve guide pipe 51 is of a circular pipe structure, one end of the exhaust valve 5 is of a disc structure, the other end of the exhaust valve 5 is of a cylindrical exhaust valve rod, and the exhaust valve 5 is used for controlling gas to flow in the exhaust passage 32. When the exhaust valve 5 is closed, the disk of the exhaust valve 5 closes the exhaust passage 32 of the cylinder head 3, so that the gas in the main combustion chamber 8 of the engine cannot be exhausted from the exhaust passage 32.
The cylinder cover 3 is of a box-type structure, one side of the cylinder cover is provided with an air inlet channel 31, the other side of the cylinder cover is provided with an air outlet channel 32, and gas in the air inlet channel 9 flows into the main combustion chamber 8 along the air inlet channel 31 and flows out of the main combustion chamber 8 along the air outlet channel 32. The exhaust valve 5 is used to control the flow of gas in the exhaust passage 32, the intake passage 31 can be opened or closed by sliding the intake valve 4 in the intake valve guide 41, and the exhaust passage 32 can be opened or closed by sliding the exhaust valve 5 in the exhaust valve guide 51.
In an embodiment, a prechamber mounting hole ring groove 35 is provided on the cylinder head 3 around the prechamber body 6, the prechamber mounting hole ring groove 35 is provided on an inner wall of the prechamber mounting hole 34 and is formed by being recessed in a direction away from the prechamber body 6, and the prechamber body 6 can be mounted to the prechamber mounting hole 34 to close the prechamber mounting hole ring groove 35 into an annular space.
Precombustion chamber mounting hole annular groove 35 with cylinder head gas passage 36's export intercommunication, precombustion chamber mounting hole annular groove 35 is connected precombustion chamber cooling passage 65 with between the cylinder head gas passage 36, precombustion chamber cooling passage 65 has both ends passageway, and wherein first section passageway is along the direction of cylinder head gas passage 36's extension line is towards precombustion chamber inner chamber 61 extends, the first section passageway of precombustion chamber cooling passage 65 does not communicate precombustion chamber inner chamber 61, and the extending direction of second section passageway is unanimous with the outer wall extending direction of precombustion chamber body 6, by precombustion chamber body 6 middle part extends to the bottom, the export of precombustion chamber cooling passage 65 is located precombustion chamber body 6's bottom and the main combustion chamber 8 intercommunication with the engine.
The cylinder head gas passage 36 both ends are connected respectively the connecting passage with precombustion chamber mounting hole annular groove 35 carries the gas in the connecting passage to precombustion chamber mounting hole annular groove 35, precombustion chamber mounting hole annular groove 35 is used for collecting the fresh gas that follows cylinder head gas passage 36 flows out, and distributes to a plurality of in the precombustion chamber cooling passage 65.
The prechamber injection holes 62 are provided in plurality around the bottom of the prechamber body 6, and each prechamber injection hole 62 is located between two adjacent prechamber cooling passages 65 in the circumferential direction. The plurality of pre-combustion chamber jet holes 62 are arranged along the circumferential direction of the pre-combustion chamber body 6, and residual waste gas after ignition in the pre-combustion chamber can be completely discharged to the main combustion chamber 8 in an intake stroke and an exhaust stroke, so that the ignition stability and the combustion uniformity of mixed gas in the main combustion chamber 8 are improved, and the coefficient of the residual waste gas in the pre-combustion chamber is reduced.
The prechamber injection holes 62 penetrate through the side wall of the prechamber inner chamber 61, and the prechamber injection holes 62 are used for connecting the prechamber inner chamber 61 with the main combustion chamber 8 of the engine, so that the ignited mixture in the prechamber inner chamber 61 is injected into the main combustion chamber 8, or the exhaust gas in the prechamber inner chamber 61 can be pushed into the main combustion chamber 8 by fresh gas.
In one embodiment, the outlet of the prechamber cooling passage 65 is positioned offset from the prechamber jet holes 62, and one end of the outlet of the prechamber cooling passage 65 converges and is connected to the main combustion chamber 8 or directly to the main combustion chamber 8.
In an embodiment, the intake pipe gas cooling prechamber apparatus further includes a throttle valve 10 disposed in the intake pipe 9, a branch port communicating with the gas connecting pipe 11 is disposed on the intake pipe 9, the throttle valve 10 is located between the branch port and an outer end of the intake passage 31 in a gas flowing direction, a connection position of the gas connecting pipe 11 and the intake pipe 9 is located in front of the throttle valve 10, and the gas connecting pipe 11 introduces high-pressure air in front of the throttle valve 10 into the cylinder head bleed air passage 33, so that it is ensured that a sufficient amount of air can flow into the prechamber cooling passage 65 to cool the prechamber.
In an embodiment, the prechamber mounting hole 34 is located between the intake valve 4 and the exhaust valve 5 and directly above the main combustion chamber 8 of the engine, the prechamber mounting hole 34 is a stepped round hole, the prechamber body is a stepped round tube, the outer peripheral surface of the stepped round tube matches the shape of the stepped round hole, the prechamber body 6 is press-fitted in the prechamber mounting hole 34, the prechamber body 6 is located directly above the main combustion chamber 8 of the engine, and the prechamber inner cavity 61 and the main combustion chamber 8 are communicated through the prechamber injection hole 62.
The upper end of the pre-chamber body 6 is provided with a pre-chamber injector mounting hole 63 for mounting a pre-chamber injector and a pre-chamber spark plug mounting hole 64 for mounting a pre-chamber spark plug, wherein the pre-chamber injector can be selectively mounted according to actual conditions.
As shown in fig. 1, on the other hand, an embodiment of the present invention provides an engine, which is a reciprocating four-stroke engine, the engine includes a cylinder block 1, a piston 2, a fuel injector 7, and the prechamber device for cooling intake pipe gas as described above, wherein the cylinder block 1 is fixed on the cylinder head 3.
The utility model discloses a combustion chamber, including cylinder body 1, piston 2, precombustion chamber body 6, cylinder body 1 is box class structure, be provided with the cylinder in the cylinder body 1, piston 2 slidable mounting in the cylinder on the cylinder body 1, piston 2 can reciprocate, form main combustion chamber 8 between the top surface of piston 2 and the bottom of precombustion chamber body 6, main combustion chamber 8 is located between cylinder body 1, cylinder cap 3 and the piston 2. The prechamber inner chamber 61 and the main combustion chamber 8 can be connected by the prechamber injection holes 62, and the ignited mixture in the prechamber inner chamber 61 is injected into the main combustion chamber 8, or the exhaust gas in the prechamber inner chamber 61 can be pushed into the main combustion chamber 8 by fresh gas.
In an embodiment, an injector 7 is mounted on the cylinder head 3, and an injection nozzle of the injector 7 extends into the intake passage 31. The injector 7 is used for injecting fuel, and fuel can be injected into the air inlet passage 31 or the main combustion chamber 8 according to different installation positions.
The utility model discloses a working process does:
during the intake stroke, the intake valve 4 is opened, the exhaust valve 5 is closed, the piston 2 moves downwards, and a part of high-pressure air in the intake pipe 9 enters the main combustion chamber 8 from the intake passage 31 of the cylinder head 3. The injector 7 may inject fuel into the intake passage 31 or the main combustion chamber 8. At this moment intake valve 4 opens, switch on through admission valve pole annular 42 between admission ring groove 43 and the air guide ring groove 44, another part gas warp gas connecting pipe 11, cylinder cap bleed air passageway 33, admission ring groove 43, admission valve pole annular 42, air guide ring groove 44 and cylinder cap gas passage 36 get into precombustion chamber mounting hole annular 35, then reentrant precombustion chamber cooling passage 65, right precombustion chamber body 6 and precombustion chamber jet orifice 62 near the wall cool off, gas enters into at last in the main combustion chamber 8.
In the compression stroke, the inlet valve 4 and the exhaust valve 5 are closed, the piston 2 moves upwards, and the air-fuel mixture in the cylinder is compressed. The mixture of air and fuel in the main chamber 8 is forced into the prechamber inner chamber 61. At this time, the intake valve 4 is in a closed state, and the intake ring groove 43 and the air guide ring groove 44 are disconnected from each other. The prechamber injector 7 on the prechamber body 6 injects a small amount of fuel into the prechamber inner chamber 61 to form a combustible mixture in the prechamber inner chamber 61.
At the end of the compression stroke, when the piston 2 is about to reach top dead center, a pre-chamber spark plug on the pre-chamber body 6 ignites igniting the mixture in the pre-chamber inner cavity 61. The pressure in the inner cavity 61 of the precombustion chamber rises, and in addition, the air inlet ring groove 43 and the air guide ring groove 44 are disconnected, so that high-temperature mixed air can be sprayed into the main combustion chamber 8 only through the precombustion chamber jet hole 62 of the precombustion chamber, and the mixed air around the main combustion chamber 8 is ignited.
In the power stroke, the mixed gas in the main combustion chamber 8 is ignited by the high-temperature gas sprayed from the jet holes 62 of the precombustion chamber, the high-temperature gas is quickly combusted, the pressure and the temperature are quickly increased, and the piston 2 is pushed to move downwards.
In the exhaust stroke, the exhaust valve 5 is opened, the piston 2 moves upward, and the burnt exhaust gas enters the exhaust passage 32 from the main combustion chamber 8 through the exhaust valve 5.
Repeating the above steps, and repeating the steps in a circulating mode.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The prechamber device for gas cooling of the air inlet pipe is characterized by comprising a cylinder cover, an air inlet valve guide pipe, an air inlet pipe, a prechamber body and a gas connecting pipe, wherein a prechamber mounting hole for mounting the prechamber body is formed in the cylinder cover, a prechamber inner cavity is formed in the prechamber body, and a prechamber jet hole for communicating the prechamber inner cavity with a main combustion chamber of an engine is formed in the bottom of the prechamber body;
the cylinder cover is provided with an air inlet channel and an air inlet valve guide pipe mounting hole, the outer end of the air inlet channel is communicated with the air inlet pipe, the inner end of the air inlet channel is communicated with a main combustion chamber of an engine, the air inlet valve guide pipe is mounted in the air inlet valve guide pipe mounting hole, and the air inlet valve is inserted in the air inlet valve guide pipe in a sliding manner; a connecting channel is arranged between the inlet valve guide pipe and the rod body of the inlet valve, a cylinder cover air entraining channel and a cylinder cover gas channel are also arranged on the cylinder cover, and the gas connecting pipe is connected between the air inlet pipe and an inlet of the cylinder cover air entraining channel;
the pre-combustion chamber body is also provided with a pre-combustion chamber cooling channel extending from the middle part to the bottom part of the pre-combustion chamber body, the upper end of the pre-combustion chamber cooling channel is communicated with a cylinder cover gas channel, and the lower end of the pre-combustion chamber cooling channel is communicated with a main combustion chamber of an engine;
and the connecting channel is communicated with an outlet of the cylinder cover air entraining channel and an inlet of the cylinder cover gas channel when the intake valve is opened.
2. The intake pipe gas temperature reduction prechamber device as set forth in claim 1, wherein a prechamber installation hole ring groove is provided in the cylinder head around the prechamber body, the prechamber installation hole ring groove communicates with the outlet of the cylinder head gas passage, a plurality of prechamber cooling passages are provided around the prechamber body, the upper ends of the plurality of prechamber cooling passages communicate with the prechamber installation hole ring groove, and the lower ends of the plurality of prechamber cooling passages communicate with the main combustion chamber of the engine.
3. The intake pipe gas temperature reduction prechamber device as claimed in claim 2, characterized in that a plurality of prechamber jet holes are arranged around the bottom of the prechamber body, each prechamber jet hole being located between two adjacent prechamber cooling channels in the circumferential direction.
4. The intake pipe gas temperature-reducing pre-chamber device as claimed in claim 1, further comprising a throttle valve disposed in the intake pipe, wherein the intake pipe is provided with a branch port communicating with the gas connection pipe, and the throttle valve is located between the branch port and an outer end of the intake passage in a gas flow direction.
5. An air inlet pipe gas cooling prechamber device as claimed in claim 1, characterized in that the air inlet pipe gas cooling prechamber device further comprises an exhaust valve and an exhaust valve guide, the cylinder cover is further provided with an exhaust passage and an exhaust valve guide mounting hole, the inner end of the exhaust passage is communicated with the main combustion chamber of the engine, the exhaust valve guide is mounted in the exhaust valve guide mounting hole, and the exhaust valve is inserted in the exhaust valve guide in a sliding manner.
6. The intake pipe gas temperature reduction prechamber device as claimed in claim 5, characterized in that the prechamber mounting hole is located between the intake and exhaust valves and directly above the main combustion chamber of the engine; the upper end of the precombustion chamber body is provided with a precombustion chamber fuel injector mounting hole and a precombustion chamber spark plug mounting hole;
the precombustion chamber mounting hole is a stepped round hole, the precombustion chamber body is a stepped round pipe, the peripheral surface of the stepped round pipe is matched with the shape of the stepped round hole, and the precombustion chamber body is pressed in the precombustion chamber mounting hole.
7. The intake duct gas desuperheating prechamber arrangement of claim 1, characterized in that the connection channel blocks the outlet of the cylinder head bleed air channel and the inlet of the cylinder head gas channel when the intake duct is closed.
8. The intake pipe gas cooling prechamber device as claimed in claim 1, wherein the intake pipe is provided with an intake ring groove and a gas guiding ring groove at intervals, the gas guiding ring groove is located below the intake ring groove, the intake ring groove is communicated with the outlet of the cylinder head gas guiding channel, the gas guiding ring groove is communicated with the inlet of the cylinder head gas guiding channel, the intake rod ring groove is arranged on the outer circumference of the rod body of the intake valve, and the intake rod ring groove, the intake rod ring groove and the gas guiding ring groove form the connecting channel;
when the intake valve is opened, an intake valve rod ring groove on the rod body of the intake valve is communicated with the intake ring groove and the air guide ring groove.
9. The intake pipe gas temperature reduction prechamber arrangement of claim 8, wherein the intake ring groove and the gas guide ring groove are blocked by the rod body of the intake valve when the intake valve is closed.
10. An engine, characterized in that, including cylinder body, piston, sprayer and claim 1-9 any one the intake pipe gas cooling's prechamber device, the cylinder cap is fixed on the cylinder body, be provided with the cylinder on the cylinder body, the piston slides and sets up in the cylinder, form main combustion chamber between the top surface of piston and the bottom of prechamber body, the sprayer is installed on the cylinder cap, be used for to intake duct or main combustion chamber oil spout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120891394.XU CN214616786U (en) | 2021-04-27 | 2021-04-27 | Prechamber device and engine of intake pipe gas cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120891394.XU CN214616786U (en) | 2021-04-27 | 2021-04-27 | Prechamber device and engine of intake pipe gas cooling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214616786U true CN214616786U (en) | 2021-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120891394.XU Active CN214616786U (en) | 2021-04-27 | 2021-04-27 | Prechamber device and engine of intake pipe gas cooling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214616786U (en) |
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2021
- 2021-04-27 CN CN202120891394.XU patent/CN214616786U/en active Active
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