CN214616743U - Pre-combustion chamber device for scavenging air in air inlet passage and engine - Google Patents
Pre-combustion chamber device for scavenging air in air inlet passage and engine Download PDFInfo
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- CN214616743U CN214616743U CN202120890196.1U CN202120890196U CN214616743U CN 214616743 U CN214616743 U CN 214616743U CN 202120890196 U CN202120890196 U CN 202120890196U CN 214616743 U CN214616743 U CN 214616743U
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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
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The utility model belongs to the technical field of engines, in particular to a pre-combustion chamber device for gas scavenging of an air inlet channel and an engine, wherein the pre-combustion chamber device comprises a cylinder cover, a pre-combustion chamber body, an air inlet valve and an air inlet valve guide pipe, the cylinder cover is provided with the air inlet channel and an air inlet valve guide pipe mounting hole, the air inlet channel is communicated with a main combustion chamber of the engine, the air inlet valve guide pipe is arranged 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 way; a connecting channel is arranged between the inlet valve guide pipe and the rod body of the inlet valve, and a cylinder cover scavenging channel is also arranged on the cylinder cover; the precombustion chamber body is provided with a precombustion chamber scavenging passage which is communicated with an outlet of the cylinder cover scavenging passage and an inner cavity of the precombustion chamber; the connecting passage is communicated with an inlet and an air inlet of a cylinder cover scavenging passage when the inlet valve is opened. And the gas enters the inner cavity of the precombustion chamber, and the residual waste gas is extruded by fresh gas, so that scavenging of the precombustion chamber is realized, the residual waste gas coefficient of the precombustion chamber is reduced, and the ignition stability is improved.
Description
Technical Field
The utility model belongs to the technical field of the engine, especially, relate to a prechamber device and engine of gaseous scavenging of intake duct.
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 engine enters an exhaust stroke, and the waste gas after combustion in the main combustion chamber is exhausted through an exhaust valve, but only part of the waste gas after combustion in the pre-combustion chamber can be exhausted under the influence of the structure of the pre-combustion chamber. The engine enters an intake stroke, fresh air or mixed gas enters the main combustion chamber of the engine through the air inlet channel, and meanwhile, part of waste gas remained in the pre-combustion chamber enters the main combustion chamber. The engine enters a compression stroke and a portion of the fresh mixture will be forced into the prechamber. Compression is near top dead center, and the residual exhaust gas coefficient in the precombustion chamber at the ignition moment is influenced by the residual exhaust gas amount in the exhaust stroke precombustion chamber and the fresh air mixture amount entering the precombustion chamber in the compression stroke. Because the diameter of the spray hole between the precombustion chamber and the main combustion chamber is small, residual waste gas after ignition of the precombustion chamber can not be completely discharged to the main combustion chamber in the intake stroke and the exhaust stroke, and the coefficient of the residual waste gas in the precombustion chamber is large. At partial load, the greater residual exhaust gas coefficient results in unstable ignition combustion in the precombustion chamber, even in fire, so that the combustion stability of the main combustion chamber is poor.
In current patent CN109083734A, utilize spare parts such as extra piston and check valve to realize the precombustion indoor scavenging function, utilize the scavenging passage to introduce the intake duct air in the precombustion indoor, sweep out remaining waste gas, improve the stability of catching fire in the precombustion indoor. However, the device requires additional parts such as pistons, valves, etc. or moving parts, and related control devices and structures, which increase the complexity and cost of the mechanism.
In current patent CN201187370Y, the sprayer of air-fuel mixture is installed to the precombustion chamber, and the air-fuel mixture that the sprayer introduced extrudes the precombustion chamber with the residual waste gas in the precombustion chamber to reduce the residual waste gas in the precombustion chamber, directly introduce a large amount of air-fuel mixtures into the precombustion chamber, improve the stability of catching fire in the precombustion chamber. However, the oil-gas mixture of the device needs to be prepared in advance, and devices such as a heater, an injector and the like, and related control devices and structures are also needed, so that the complexity, the cost and the volume of the mechanism are increased.
In prior patent CN108071546A, the pre-chamber is equipped with an air injector, and the air introduced by the injector discharges the residual exhaust gas in the pre-chamber out of the pre-chamber, resulting in a reduction of residual exhaust gas in the pre-chamber. And the air ejector is used for injecting external air into the precombustion chamber, so that residual waste gas is extruded out, and the ignition stability in the precombustion chamber is improved. However, the device needs high-pressure gas, and also needs equipment such as an injector and related control devices and structures, so that the complexity and the cost of the mechanism are increased, and the gas injector is large in size and difficult to install on a gasoline engine with a small cylinder diameter.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: aiming at the problem that the stability of a main combustion chamber is influenced because the coefficient of residual waste gas of the pre-combustion chamber is large in the existing engine, the pre-combustion chamber device for scavenging gas in the air inlet passage and the engine are provided.
In order to solve the technical problem, on one hand, the utility model provides a pre-combustion chamber device for scavenging gas in an air inlet passage, which comprises a cylinder cover, a pre-combustion chamber body, an air inlet valve and an air inlet valve guide pipe; the cylinder cover is provided with a precombustion chamber mounting hole for mounting the precombustion chamber body, a precombustion chamber inner cavity is formed inside the precombustion chamber body, and a precombustion chamber jet hole for communicating the precombustion chamber inner cavity with a main combustion chamber of an engine is formed at the bottom of the precombustion chamber body;
the cylinder cover is provided with an air inlet channel and an air inlet valve guide pipe mounting hole, 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, and a cylinder cover scavenging channel is also arranged on the cylinder cover; the pre-combustion chamber body is provided with a pre-combustion chamber scavenging passage which is communicated with an outlet of the cylinder cover scavenging passage and an inner cavity of the pre-combustion chamber;
the connecting channel is used for communicating the inlet of the cylinder cover scavenging channel and the air inlet channel when the inlet valve is opened.
Optionally, the connecting passage blocks an inlet and an intake passage of the head scavenging passage when the intake valve is closed.
Optionally, an air inlet ring groove and an air guide ring groove are formed in the air inlet valve guide pipe, the air guide ring groove is located below the air inlet ring groove, the air inlet ring groove is communicated with the air inlet channel, the air guide ring groove is communicated with the cylinder cover scavenging channel, an air inlet valve rod ring groove is formed in 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.
Optionally, encircle on the cylinder head the precombustion chamber body is provided with precombustion chamber mounting hole annular, precombustion chamber mounting hole annular with the export intercommunication of cylinder cap scavenging passage, the precombustion chamber scavenging passage encircles the precombustion chamber body is provided with a plurality ofly, and is a plurality of the entry of precombustion chamber scavenging passage with precombustion chamber mounting hole annular intercommunication, it is a plurality of the export of precombustion chamber scavenging passage with the precombustion chamber inner chamber intercommunication.
Optionally, the prechamber injection holes are provided in plurality around the bottom of the prechamber body.
Optionally, the inlet passage gas scavenging precombustion chamber device 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 exhaust passage is communicated with the 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 mode.
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; and a pre-combustion chamber oil sprayer and a pre-combustion chamber spark plug are arranged at the upper end of the pre-combustion chamber body.
Optionally, the prechamber mounting hole is a stepped circular hole, the prechamber body is a stepped circular tube, the outer peripheral surface of the stepped circular tube is matched with the stepped circular hole in shape, and the prechamber body is pressed in the prechamber mounting hole.
On the other hand, the utility model provides an engine, including cylinder body, piston, sprayer and as before the gaseous antechamber device of scavenging of intake duct, 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, the top surface of piston with form main combustion chamber between the bottom of antechamber body, the sprayer is installed on the cylinder cap, be used for to intake duct oil spout on main combustion chamber or the cylinder cap.
The utility model discloses in, at the intake stroke, through the (air) intake valve is in motion in the (air) intake valve pipe makes intercommunication between the entry of cylinder cap scavenging passage and the intake duct, gaseous in the intake duct through connecting channel, cylinder cap scavenging passage and precombustion chamber scavenging passage get into in the precombustion chamber inner chamber. The residual waste gas in the precombustion chamber body is extruded by fresh gas and enters a main combustion chamber of the engine, so that the residual waste gas in the cavity in the precombustion chamber is reduced and even eliminated. Therefore, scavenging of the precombustion chamber is realized, the residual waste gas coefficient of the precombustion chamber is reduced, and the ignition stability is improved. And the device has simple structure, small volume, convenient operation, no need of adding extra parts, good effect of reducing residual waste gas and low cost.
Drawings
FIG. 1 is a schematic diagram of a port gas scavenging prechamber arrangement for an engine according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an intake valve according to an embodiment of the present invention when opened;
fig. 3 is a schematic structural diagram of an intake valve 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 scavenging passage; 34. a pre-combustion chamber mounting hole; 35. a precombustion chamber mounting hole ring groove; 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 pre-combustion chamber scavenging passage; 7. an oil injector; 8. a main combustion chamber.
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 fig. 3, in one aspect, an embodiment of the present invention provides a prechamber device for scavenging intake air, including a cylinder head 1, a prechamber body 6, an intake valve 4, and an intake valve duct 41. Be provided with on the cylinder head 3 and be used for installing prechamber mounting hole 34 of prechamber body 6, prechamber mounting hole 34 is 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 (air) intake valve pipe mounting hole 40 on the cylinder cap 1, intake duct 31 communicates with the main combustion chamber 8 of engine, through intake duct 31 will in the high-pressure gas in the intake pipe 9 introduces 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 intake valve pipe 41 and intake valve, still be provided with cylinder cap scavenging passage 33 on the cylinder cap 1, be provided with the intercommunication on the precombustion chamber body 6 the export of cylinder cap scavenging passage 33 and the precombustion chamber scavenging passage 65 of precombustion chamber inner chamber 61.
The connecting passage communicates with the inlet of the head scavenging passage 33 and the intake passage 31 when the intake valve 4 is opened.
The utility model discloses in, at the intake stroke, through (air) intake valve 4 is in motion in the air intake valve pipe 41 makes intercommunication between the entry of cylinder cap scavenging passage 33 and the intake duct 31, gaseous entering through connecting channel, cylinder cap scavenging passage 33 and precombustion chamber scavenging passage 65 in the intake duct in the precombustion chamber inner chamber 61. The residual exhaust gas in the inner cavity 61 of the precombustion chamber is extruded by fresh gas and enters the main combustion chamber 8 of the engine, so that the residual exhaust gas in the inner cavity 61 of the precombustion chamber is reduced and even eliminated. Therefore, scavenging of the precombustion chamber is realized, the residual waste gas coefficient of the precombustion chamber is reduced, and the ignition stability is improved. And the device has simple structure, small volume, convenient operation, no need of adding extra parts, good effect of reducing residual waste gas and low cost.
In an embodiment, in other strokes except the intake stroke, the intake valve 4 is closed, the intake passage 31 is not communicated with the main combustion chamber 8 of the engine, the connecting passage is in the closing of the intake valve to block the inlet and the intake passage 31 of the cylinder head scavenging passage 33, the inlet and the intake passage of the cylinder head scavenging passage 33 are not communicated, and the high-pressure mixture and the high-temperature and high-pressure exhaust gas in the main combustion chamber 8 can be prevented from reversely flowing out to the intake passage 31 of the cylinder head 3 through the prechamber scavenging passage 65, the cylinder head scavenging passage 33 and the connecting passage.
In an embodiment, intake valve pipe 41 is last to be provided with air intake ring groove 43 and air guide ring groove 44 at the interval, air guide ring groove 44 is located the below of air intake ring groove 43, air intake ring groove 43 with intake duct 31 communicates, air guide ring groove 44 with cylinder head scavenging passage 33 communicates, be provided with intake valve pole annular groove 42 on the periphery of the body of rod of intake valve 4, when intake valve 4 opens, air intake ring groove 43 and air guide ring groove 44 are by intake valve pole annular groove 42 communicates, air intake ring groove 43, intake valve pole annular groove 42 and air guide ring groove 44 constitute connecting channel.
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 intake valve 4 closes, intake valve pole annular groove 42 intake valve pole annular groove 43 with lead the gas ring groove 44 and stagger each other, intake valve pole annular groove 42 can't communicate intake valve pole annular groove 43 with lead gas ring groove 44, the cylinder cap scavenging passageway 33 reaches be blocked between the intake duct.
Slide intake valve 4, intake valve 4 opens the back, intake valve 4's disc is no longer right intake duct 31 of cylinder cap 3 seals, gas in the intake pipe 9 can pass through intake duct 31 gets into in the cylinder cap 3, intake valve rod ring groove 42 is along with intake valve 4 moves, moves to intake ring groove 43 with between the air guide ring groove 44, make intake ring groove 43 with air guide ring groove 44 intercommunication, cylinder cap scavenging passage 33 reaches communicate between the intake duct, gas in the intake pipe 9 gets into in the intake ring groove 43, through behind intake valve rod ring groove 42, gas warp in the air guide ring groove 44 cylinder cap scavenging passage 33, intake chamber scavenging passage 65 gets into in the precombustion chamber inner chamber, it is right precombustion chamber body 6 scavenges.
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 in the intake passage 31 enters the pre-combustion chamber scavenging passage 65 through the intake ring groove 43, the intake valve rod ring groove 42, the air guide ring groove 44 and the cylinder head scavenging passage 33, and scavenges the pre-combustion chamber 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. Therefore, scavenging of the precombustion chamber is realized, the residual waste gas coefficient of the precombustion chamber is reduced, and the ignition stability is improved. And the device has simple structure, small volume, convenient operation, no need of adding extra parts, good effect of reducing residual waste gas and low cost.
In an embodiment, the position corresponding to the air inlet ring groove 43 is in the air inlet hole is opened on the air inlet valve guide pipe 41, the position corresponding to the air guide ring groove 44 is in the air inlet valve guide pipe 41 is opened with the air guide hole, the air inlet ring groove 43 and the air inlet passage 31 are passed through the air inlet hole is connected, the air guide ring groove 44 and the cylinder cover scavenging passage 33 are passed through the air guide hole is connected. The intake hole penetrates the intake valve guide 41 so that the intake ring groove 43 and the intake passage 31 communicate, and gas can enter the intake ring groove 43. The air-guide hole penetrates the intake valve guide pipe 41, so that the air-guide ring groove 44 is communicated with the cylinder cover scavenging passage 33, and the gas in the air-guide ring groove 44 can enter the cylinder cover scavenging passage 33.
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. The gas of intake duct 31 can pass through in proper order connecting channel, cylinder cap scavenge air passageway 33 with advance chamber scavenge air passageway 65 back gets into in the precombustion chamber inner chamber, it is right precombustion chamber body 6 sweeps, gas in the intake duct 31 can also get into in the main combustion chamber. 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 intake passage gas scavenging pre-combustion chamber device further comprises 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 mode, and the exhaust valve 5 can move axially in the exhaust valve guide pipe 51. The exhaust valve guide pipe 51 is of a round 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 rod body, 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 31, the other side of the cylinder cover is provided with an air outlet 32, air flows into the main combustion chamber 8 along the air inlet 31, and flows out of the main combustion chamber 8 along the air outlet 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 the export intercommunication of cylinder cap scavenging passage 33, precombustion chamber mounting hole annular groove 35 is connected precombustion chamber scavenging passage 65 with between the cylinder cap scavenging passage 33, precombustion chamber scavenging passage 65 encircles precombustion chamber body 6 is provided with a plurality ofly, and is a plurality of the entry of precombustion chamber scavenging passage 65 with precombustion chamber mounting hole annular groove 35 intercommunication, a plurality of the export of precombustion chamber scavenging passage 65 all with the precombustion chamber inner chamber intercommunication.
In one embodiment, the cross section of the pre-chamber scavenging passage 65 is a circular hole, one end of the pre-chamber scavenging passage 65 is connected with the pre-chamber mounting hole ring groove 35, and the other end is connected with the pre-chamber inner cavity 61, so that fresh gas in the pre-chamber mounting hole ring groove 35 can enter the pre-chamber inner cavity 61. When the intake valve 4 is opened, the air inlet ring groove 43 and the air guide ring groove 44 are communicated, and the gas in the air inlet channel 31 enters the prechamber inner cavity 61 through the air inlet ring groove 43, the air inlet valve rod ring groove 42, the air guide ring groove 44, the cylinder cover scavenging passage 33, the prechamber mounting hole ring groove 35 and the prechamber scavenging passage 65.
The cylinder cap is scavenged the passageway 33 both ends and is connected respectively the connecting channel with precombustion chamber mounting hole annular groove 35 will gaseous the transport in the connecting channel precombustion chamber mounting hole annular groove 35, precombustion chamber mounting hole annular groove 35 is used for collecting the follow fresh gas that the passageway 33 flowed out is scavenged to the cylinder cap, and distributes a plurality of in the precombustion chamber scavenging passageway 65.
In an embodiment, a plurality of prechamber injection holes 62 are arranged around the bottom of the prechamber body 6, the prechamber injection holes 62 are used for discharging gas in the prechamber inner cavity 61, and residual exhaust gas after ignition in the prechamber 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 residual exhaust gas coefficient in the prechamber 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 an embodiment the pre-chamber scavenging passage 65 is located away from the pre-chamber jet holes 62, facilitating the extrusion of residual exhaust gas from fresh gas entering the pre-chamber inner chamber 61 from the pre-chamber scavenging passage 65.
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 6 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 holes 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. When the pre-combustion chamber oil injector is installed, the active pre-combustion chamber is corresponding, otherwise, the passive pre-combustion chamber is corresponding. The device of the invention can be applied to two technical schemes of an active precombustion chamber and a passive precombustion chamber.
As shown in fig. 1, in another aspect, an embodiment of the present invention provides an engine, which is a reciprocating four-stroke engine, and the engine includes a cylinder block 1, a piston 2, an injector 7, and a pre-chamber device for scavenging air from an intake duct as described above, where 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 air enters the main combustion chamber 8 from the air inlet channel 31 of the cylinder cover 3 through the intake valve 4. The injector 7 may inject fuel into the intake passage 31 or the main combustion chamber 8. At this time, the intake valve 4 is opened, the intake ring groove 43 and the air guide ring groove 44 are communicated with each other through the intake rod ring groove 42, and the gas enters the prechamber inner cavity 61 through the intake ring groove 43, the intake rod ring groove 42, the air guide ring groove 44, the cylinder cover scavenging passage 33, the prechamber mounting hole ring groove 35 and the prechamber scavenging passage 65. After the fresh gas enters the inner cavity 61 of the precombustion chamber, the residual waste gas in the original cavity is extruded out of the main combustion chamber 8 through the precombustion chamber jet hole 62 on the precombustion chamber body 6, so that the residual waste gas amount in the inner cavity 61 of the precombustion chamber is reduced.
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. For the active prechamber solution, the prechamber injector on the prechamber body 6 injects a small amount of fuel into the prechamber inner cavity 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. A pre-combustion chamber device for scavenging gas in an air inlet passage is characterized by comprising a cylinder cover, a pre-combustion chamber body, an air inlet valve and an air inlet valve guide pipe; the cylinder cover is provided with a precombustion chamber mounting hole for mounting the precombustion chamber body, a precombustion chamber inner cavity is formed inside the precombustion chamber body, and a precombustion chamber jet hole for communicating the precombustion chamber inner cavity with a main combustion chamber of the engine is formed at the bottom of the precombustion chamber body;
the cylinder cover is provided with an air inlet channel and an air inlet valve guide pipe mounting hole, 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, and a cylinder cover scavenging channel is also arranged on the cylinder cover; the pre-combustion chamber body is provided with a pre-combustion chamber scavenging passage which is communicated with an outlet of the cylinder cover scavenging passage and an inner cavity of the pre-combustion chamber;
the connecting channel is used for communicating the inlet of the cylinder cover scavenging channel and the air inlet channel when the inlet valve is opened.
2. The port gas scavenged prechamber arrangement as in claim 1, wherein the connecting passage blocks the inlet of the head scavenging passage and the intake port when the intake valve is closed.
3. The pre-chamber device for scavenging intake air according to claim 1, wherein an intake ring groove and an exhaust ring groove are provided on the intake valve guide, the exhaust ring groove is located below the intake ring groove, the intake ring groove communicates with the intake passage, the exhaust ring groove communicates with the cylinder head scavenging passage, an intake rod ring groove is provided on the outer periphery of the rod body of the intake valve, and the intake ring groove, the intake rod ring groove and the exhaust ring groove constitute the connecting passage;
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.
4. The port gas scavenged prechamber arrangement of claim 3, wherein the inlet ring groove and the pilot ring groove are blocked by the stem of the inlet valve when the inlet valve is closed.
5. The port gas scavenged prechamber device as set forth in claim 1, wherein a prechamber mounting hole ring groove is provided in the cylinder head around the prechamber body, the prechamber mounting hole ring groove communicates with the outlet of the cylinder head scavenging passage, a plurality of prechamber scavenging passages are provided around the prechamber body, the inlets of the prechamber scavenging passages communicate with the prechamber mounting hole ring groove, and the outlets of the prechamber scavenging passages communicate with the prechamber inner chamber.
6. The port gas scavenged prechamber arrangement of claim 1, wherein the prechamber jet holes are arranged in a plurality around the bottom of the prechamber body.
7. The port air scavenged prechamber arrangement as claimed in claim 1, characterized in that the port air scavenged prechamber arrangement further comprises an exhaust valve and an exhaust valve guide, and the cylinder head is further provided with an exhaust passage and an exhaust valve guide mounting hole, the exhaust passage communicates with the main combustion chamber of the engine, and the exhaust valve guide is mounted in the exhaust valve guide mounting hole, and the exhaust valve is slidably inserted into the exhaust valve guide.
8. The port gas scavenged prechamber arrangement as in claim 7, wherein the prechamber mounting holes are located between the intake and exhaust valves and directly above the main combustion chamber of the engine; and a pre-combustion chamber oil sprayer and a pre-combustion chamber spark plug are arranged at the upper end of the pre-combustion chamber body.
9. The port gas scavenging prechamber arrangement according to claim 1, wherein the prechamber attachment hole is a stepped round hole, the prechamber body is a stepped round tube, the outer circumferential surface of the stepped round tube matches the shape of the stepped round hole, and the prechamber body is press-fitted into the prechamber attachment hole.
10. An engine, characterized in that, including cylinder body, piston, sprayer and claim 1-9 any one gaseous antechamber device of scavenging of intake duct, 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, the top surface of piston with form main combustion chamber between the bottom of antechamber body, the sprayer is installed on the cylinder cap, be used for to the intake duct oil spout on main combustion chamber or the cylinder cap.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120890196.1U CN214616743U (en) | 2021-04-27 | 2021-04-27 | Pre-combustion chamber device for scavenging air in air inlet passage and engine |
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| CN202120890196.1U CN214616743U (en) | 2021-04-27 | 2021-04-27 | Pre-combustion chamber device for scavenging air in air inlet passage and engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115217615A (en) * | 2022-04-06 | 2022-10-21 | 广州汽车集团股份有限公司 | Scavenging device and scavenging method |
| CN115324717A (en) * | 2022-10-14 | 2022-11-11 | 潍柴动力股份有限公司 | Equivalent ratio engine |
-
2021
- 2021-04-27 CN CN202120890196.1U patent/CN214616743U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115217615A (en) * | 2022-04-06 | 2022-10-21 | 广州汽车集团股份有限公司 | Scavenging device and scavenging method |
| CN115217615B (en) * | 2022-04-06 | 2023-08-15 | 广州汽车集团股份有限公司 | Scavenging device and scavenging method |
| CN115324717A (en) * | 2022-10-14 | 2022-11-11 | 潍柴动力股份有限公司 | Equivalent ratio engine |
| CN115324717B (en) * | 2022-10-14 | 2023-03-21 | 潍柴动力股份有限公司 | Equivalent ratio engine |
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