CN113944542A - Precombustion chamber, engine and vehicle - Google Patents
Precombustion chamber, engine and vehicle Download PDFInfo
- Publication number
- CN113944542A CN113944542A CN202111012234.4A CN202111012234A CN113944542A CN 113944542 A CN113944542 A CN 113944542A CN 202111012234 A CN202111012234 A CN 202111012234A CN 113944542 A CN113944542 A CN 113944542A
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- Prior art keywords
- cavity
- chamber
- combustion
- cover
- precombustion
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 72
- 230000002000 scavenging effect Effects 0.000 claims description 29
- 230000007246 mechanism Effects 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000002912 waste gas Substances 0.000 abstract description 29
- 239000007789 gas Substances 0.000 description 13
- 239000007921 spray Substances 0.000 description 6
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Images
Classifications
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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
- F02B19/00—Engines characterised by precombustion chambers
- F02B19/12—Engines characterised by precombustion chambers with positive ignition
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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
- F02B19/00—Engines characterised by precombustion chambers
- F02B19/16—Chamber shapes or constructions not specific to sub-groups F02B19/02 - F02B19/10
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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 invention discloses a precombustion chamber, an engine and a vehicle, which can stably and uniformly discharge waste gas in the precombustion chamber, reduce the influence of residual waste gas on combustion stability, improve combustion heat efficiency and improve emission. The precombustion chamber comprises a cavity, a gear, a triangular rotor and an ignition device; the cavity is provided with a pre-combustion cavity, the gear is rotatably arranged on the cavity wall of the cavity and is positioned in the pre-combustion cavity, the triangular rotor is arranged in the pre-combustion cavity, the triangular rotor is provided with an inner gear ring, the triangular rotor is meshed with the gear through the inner gear ring, and the inner profile of the pre-combustion cavity is matched with the motion track of the triangular rotor; the wall of the cavity is provided with a mounting hole communicated with the precombustion cavity, and the ignition device is mounted in the mounting hole; be provided with the orifice that link up the chamber wall more than 2 on the chamber wall of cavity, the combustion chamber intercommunication of the main combustion chamber of precombustion chamber through orifice and engine is carried out through the triangle rotor to the precombustion chamber inside waste gas and scavenges, reduces the residual waste gas in the precombustion chamber, makes the burning in the precombustion chamber more stable.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a precombustion chamber, an engine and a vehicle.
Background
The precombustion chamber is 1 small combustion chamber in the combustion chamber of the gasoline engine, the precombustion chamber can be connected with the main combustion chamber through a through jet hole, and combustible mixed gas enters the precombustion chamber in the air intake stroke and is ignited by an electrode. The flame front formed after the mixture is ignited flows out from the jet holes on the surface of the precombustion chamber and ignites the combustible mixture in the main combustion chamber. Multiple ignition locations within the combustion chamber may allow for faster and more complete combustion of the mixture.
The waste gas generated after the combustible mixture is combusted in the pre-combustion chamber can influence the combustion stability, and further influence the thermal efficiency and the emission. However, the exhaust emission of the combustion chamber in the prior art is uneven and insufficient, and the stability of combustion and the thermal efficiency are affected.
Disclosure of Invention
In order to solve the technical problem, the invention provides a precombustion chamber, an engine and a vehicle, which ensure the stable emission of waste gas in the precombustion chamber.
The technical scheme adopted for realizing the aim of the invention is that the precombustion chamber comprises a cavity, a gear, a triangular rotor and an ignition device; the cavity is provided with a pre-combustion cavity, the gear is rotatably installed on the cavity wall of the cavity and is positioned in the pre-combustion cavity, the triangular rotor is arranged in the pre-combustion cavity, the triangular rotor is provided with an inner gear ring, the triangular rotor is meshed with the gear through the inner gear ring, and the inner profile of the pre-combustion cavity is matched with the motion track of the triangular rotor; the wall of the cavity is provided with a mounting hole communicated with the precombustion cavity, and the ignition device is mounted in the mounting hole; more than 2 jet holes penetrating through the cavity wall are formed in the cavity wall of the cavity, and the pre-combustion cavity is communicated with a combustion cavity of a main combustion chamber of the engine through the jet holes.
Further, the cavity comprises a cavity seat and a cavity cover, the cavity seat and the cavity cover enclose the pre-combustion cavity, the cavity cover is movably arranged in the cavity seat, and the ignition device is arranged in the cavity cover; the prechamber further comprises a drive assembly for driving the movement of the chamber cover.
Furthermore, the driving assembly comprises a linear moving mechanism and an elastic piece, the linear moving mechanism and the elastic piece are distributed on two sides of the cavity cover, and two ends of the elastic piece act on the cavity seat and the cavity cover respectively.
Further, the linear moving mechanism comprises a power element and a cam, the cam is connected with an output shaft of the power element, and the outer profile of the cam acts on the cavity cover.
Furthermore, the top end of the cavity seat is provided with a concave part, the cavity cover is provided with a flange edge, and the flange edge extends into and is movably arranged in the concave part; an axial gap is formed between the flange edge and the concave part, and the elastic piece is arranged in the axial gap.
Further, three top points of the triangular rotor are in contact with an inner profile of the precombustion cavity, so that the precombustion cavity is divided into 1 ignition region and 2 scavenging regions which are independent of each other, the ignition region is communicated with the mounting hole, and the jet holes are communicated with the ignition region and the combustion cavity; the cavity is provided with more than 1 scavenging hole for communicating the scavenging area with the combustion cavity.
Furthermore, more than 2 spray holes are arranged at intervals along the circumferential direction of the cavity.
Further, the more than 2 jet holes are arranged on the same cross section of the cavity.
Based on the same inventive concept, the invention also provides an engine, which comprises a main combustion chamber and the precombustion chamber, wherein the main combustion chamber is communicated with the precombustion chamber through the jet holes.
Based on the same inventive concept, the invention also provides a vehicle comprising the engine.
According to the technical scheme, the precombustion chamber comprises a cavity, a gear, a triangular rotor and an ignition device; the cavity has the precombustion chamber, the gear revolve install on the chamber wall of cavity, and be located the precombustion intracavity, the triangle rotor sets up in the precombustion chamber, the triangle rotor has the ring gear, the triangle rotor passes through ring gear and gear engagement, the inner profile of precombustion chamber and the movement track phase-match of triangle rotor, the gear constitutes planetary gear set with the triangle rotor jointly, and the triangle rotor laminating precombustion chamber inner wall rotates, sweeps precombustion waste gas inside the precombustion chamber, fully stir the internal gas field of precombustion chamber, guarantee the homogeneity of scavenging. The wall of the cavity is provided with a mounting hole communicated with the precombustion cavity, the ignition device is mounted in the mounting hole, and the combustible mixed gas entering the precombustion chamber is firstly ignited and combusted in an area close to the mounting hole to generate waste gas; be provided with the orifice that link up the chamber wall more than 2 on the chamber wall of cavity, the combustion chamber intercommunication of the main combustion chamber of orifice and engine is passed through to the precombustion chamber for when the triangle rotor is at the precombustion chamber internal rotation, compression waste gas evenly with waste gas from the spout discharge into the main combustion chamber, it is even to guarantee that the scavenging of waste gas purging in-process, with the stable even discharge of waste gas in the precombustion chamber, reduces the influence of residual waste gas to combustion stability, improves the thermal efficiency of burning, improves and discharges.
The engine and the vehicle provided by the invention adopt the precombustion chamber, and the exhaust gas in the precombustion chamber is scavenged through the triangular rotor, so that the residual exhaust gas in the precombustion chamber is reduced, and the combustion in the precombustion chamber is more stable.
Drawings
FIG. 1 is a schematic cross-sectional view of a precombustor provided in accordance with example 1 of the present invention.
Reference numerals: 1-cavity, 11-spray hole, 12-mounting hole, 13-cavity seat, 14-cavity cover, 15-scavenging hole, 16-ignition region and 17-scavenging region; 2-a triangular rotor; 3-a gear; 4-an ignition device; 5-drive assembly, 51-elastic member, 52-power element, 53-cam.
Detailed Description
In order to make the present application more clearly understood by those skilled in the art to which the present application pertains, the following detailed description of the present application is made with reference to the accompanying drawings by way of specific embodiments.
In order to solve the technical problems of uneven and insufficient exhaust emission of a combustion chamber and influence on combustion stability and thermal efficiency in the prior art, the invention provides a precombustion chamber, an engine and a vehicle, which ensure stable exhaust emission in the precombustion chamber, and the content of the invention is described in detail by 3 specific embodiments as follows:
example 1
As shown in figure 1, the invention provides a precombustion chamber, which comprises a cavity 1, a gear 3, a triangular rotor 2 and an ignition device 4; cavity 1 has the precombustion chamber, gear 3 rotates and installs on cavity wall of cavity 1, and be located the precombustion chamber, three-angle rotor 2 sets up in the precombustion chamber, three-angle rotor 2 has the ring gear, three-angle rotor 2 passes through the ring gear and meshes with gear 3, the inner profile of precombustion chamber and three-angle rotor 2's movement track phase-match, gear 3 constitutes planetary gear set with three-angle rotor 2 jointly, and three-angle rotor 2 laminating precombustion chamber inner wall rotates, sweep precombustion waste gas inside the precombustion chamber, fully stir the inside air field of precombustion chamber, guarantee the homogeneity of scavenging. The cavity wall of the cavity 1 is provided with a mounting hole 12 communicated with the precombustion cavity, the ignition device 4 is arranged in the mounting hole 12, and the combustible mixed gas entering the precombustion cavity is firstly ignited and combusted in an area close to the mounting hole 12 to generate waste gas; be provided with the orifice 11 that link up the chamber wall more than 2 on the chamber wall of cavity 1, the combustion chamber intercommunication of the main combustion chamber of orifice 11 and engine is passed through to the precombustion chamber for when the three-lobe rotor 2 is at the precombustion chamber internal rotation, compression waste gas evenly discharges waste gas from the spout into the main combustion chamber, it is even to guarantee that the scavenging of waste gas purging in-process, discharge the waste gas in the precombustion chamber is stable even, reduce the influence of residual waste gas to combustion stability, improve the thermal efficiency of burning, improve the emission.
In order to match the prechamber with requirements at different rotating speeds while scavenging, in the embodiment, the cavity 1 comprises a cavity base 13 and a cavity cover 14, the prechamber further comprises a driving assembly 5 for driving the cavity cover 14 to move, the cavity base 13 and the cavity cover 14 enclose the prechamber, the cavity cover 14 is movably arranged in the cavity base 13, the ignition device 4 is arranged in the cavity cover 14, namely, a mounting hole 12 for mounting the ignition device 4 is arranged on the inner profile of the cavity cover 14, so that under different rotating speed loads, the distance between the cavity cover 14 and the cavity base 13 can be changed through the driving assembly 5, the volume of the prechamber is adjusted to be proper, the quality of mixed gas entering the prechamber is adjusted, proper jet energy is generated by combustion, and the heat efficiency is improved.
The installation of the driving assembly 5 is not limited in this embodiment, as long as the driving assembly 5 acts on the cavity cover 14 and drives the cavity cover 14 to move in the cavity base 13, for example, the driving assembly 5 may be disposed on the cavity base 13 or on the base structure of the engine.
In order to controllably slide and reset the cavity cover 14 in the cavity 1, in this embodiment, the driving assembly 5 includes a linear moving mechanism and an elastic member 51, the linear moving mechanism and the elastic member 51 are distributed on two sides of the cavity cover 14, two ends of the elastic member 51 respectively act on the cavity base 13 and the cavity cover 14, and the elastic member 51 enables the cavity cover 14 to automatically reset under the working condition without the action of the cam 53, thereby ensuring the adjustment of the volume and the control precision.
The structure of the linear moving mechanism is not limited in the invention, and any scheme which can be implemented can be selected, such as a motor which is mechanically linked with the cavity cover 14, a worm and gear structure, or a linear moving mechanism which is formed by a steering engine and a deflector rod. In order to facilitate controlling the displacement of the cavity cover 14, in this embodiment, the linear moving mechanism includes a power element 52 and a cam 53, the cam 53 is connected to an output shaft of the power element 52, an outer surface of the cam 53 acts on the cavity cover 14, and the power element 52 may be a motor, a steering engine, and the like, which is not limited in this embodiment.
The structure and the connection mode of each part of the cavity 1 are not particularly limited, as long as the requirements are met and the technical effects are realized, in the embodiment, the top end of the cavity base 13 is provided with a concave part, the cavity cover 14 is provided with a flange edge, and the flange edge extends into and is movably arranged in the concave part; the flange edge has an axial clearance with the recess, in which the resilient member 51 is arranged.
The number and the layout of the spray holes 11 are not particularly limited in the present invention, and in order to ensure the uniformity of the scavenging, preferably, more than 2 spray holes 11 are arranged at intervals along the circumferential direction of the cavity 1. In this embodiment, in order to sufficiently ensure the exhaust of the exhaust gas, the 6 nozzle holes 11 are uniformly and alternately arranged along the circumferential direction of the cavity 1.
The nozzle holes 11 may be arranged at intervals along the axial direction of the cavity 1, and in order to further improve the scavenging effect, in the present embodiment, preferably, more than 2 nozzle holes 11 are arranged on the same cross section of the cavity 1.
Because three vertexes of the triangular rotor 2 are in contact with the inner profile of the precombustion cavity, the triangular rotor 2 divides the precombustion cavity into 1 ignition region 16 and 2 scavenging regions 17 which are mutually independent, combustible mixed gas is firstly combusted after entering the precombustion cavity and then is scavenged by the triangular rotor 2, which is beneficial to the design of working conditions, and meanwhile, in order to ensure that waste gas in the precombustion cavity is fully discharged, in the embodiment, the ignition region 16 is communicated with the mounting hole 12, and the spray hole 11 is communicated with the ignition region 16 and the combustion cavity; more than 1 scavenging holes 15 for communicating a scavenging area 17 with a combustion cavity are arranged on the cavity 1 and used for supplementing scavenging discharge, namely, the spray holes 11 are close to the mounting holes 12 along the axial direction of the cavity 1, and the scavenging holes 15 are far away from the mounting holes 12.
The number and the arrangement positions of the scavenging holes 15 are not particularly limited, at least 1 scavenging area 17 is communicated with the combustion chamber through the scavenging holes 15, and in order to optimize the design and reduce unnecessary processing, in the embodiment, the scavenging holes 15 are arranged on the chamber wall corresponding to the scavenging area 17 after the ignition area 16 and the scavenging area 17 which the triangular rotor 2 firstly rotates.
Compared with the prior art, the application method and the working principle of the precombustion chamber provided by the invention are as follows:
under different rotating speed loads, under the combined action of the linear moving mechanism and the elastic piece 51, the position of the cavity cover 14 in the cavity 1 is adjusted so as to adjust the volume of the pre-combustion chamber to be proper, thereby adjusting the quality of mixed gas entering the pre-combustion chamber, generating proper jet energy by combustion and improving the heat efficiency. After the mixed gas is combusted in the pre-combustion space, the cavity cover 14 reaches a set position and can cooperate with the planetary gear set to scavenge, so that residual waste gas in the pre-combustion space is reduced, combustion is more stable, and emission is improved.
Example 2
Based on the same inventive concept, the present embodiment provides an engine, which includes a main combustion chamber and the prechamber provided in embodiment 1, wherein the main combustion chamber is communicated with the prechamber through a nozzle hole 11, that is, the cavity 1 of the prechamber in the engine adopts the structure provided in embodiment 1, and a planetary gear set composed of a triangular rotor 2 and a gear 3 is arranged in the cavity 1.
Example 3
Based on the same inventive concept, the present embodiment provides a vehicle including the engine provided in embodiment 2. By adopting the pre-chamber structure in embodiment 1, the vehicle naturally has all the corresponding technical effects. The present invention is not limited to the type and type of the vehicle, and may be any vehicle in the prior art, such as a common passenger car, a truck, etc., and other structures of the vehicle, which are not described in detail, may refer to the related disclosure of the prior art, and will not be described herein.
Through the embodiment, the invention has the following beneficial effects or advantages:
1) the triangular rotor and the gear jointly form a planetary gear set, the triangular rotor is always attached to the cavity when scavenging, the triangular rotor is used for uniformly scavenging air in the pre-combustion chamber, pre-combustion waste gas is swept in the pre-combustion chamber, an internal gas field of the pre-combustion chamber is fully stirred, and the uniformity of scavenging air is guaranteed. When the triangular rotor rotates in the precombustion chamber, the compressed waste gas uniformly discharges the waste gas into the main combustion chamber from the nozzle, so that the scavenging uniformity in the waste gas purging process is ensured, the waste gas in the precombustion chamber is stably and uniformly discharged, the influence of residual waste gas on the combustion stability is reduced, the combustion heat efficiency is improved, and the discharge is improved.
2) Under different rotational speed loads, under the combined action of the cam and the elastic piece, the position of the cavity cover in the cavity is adjusted to be adjustable to a proper precombustion chamber volume, so that the quality of mixed gas entering the precombustion chamber is adjusted, the volume of the precombustion chamber is variable, the scavenging is carried out by matching with the triangular rotor, the requirement on jet flow energy of the precombustion chamber under different rotational speed loads of the engine is met, and the influence of residual waste gas on combustion stability is reduced.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A precombustion chamber is characterized by comprising a cavity, a gear, a triangular rotor and an ignition device; the cavity is provided with a pre-combustion cavity, the gear is rotatably installed on the cavity wall of the cavity and is positioned in the pre-combustion cavity, the triangular rotor is arranged in the pre-combustion cavity, the triangular rotor is provided with an inner gear ring, the triangular rotor is meshed with the gear through the inner gear ring, and the inner profile of the pre-combustion cavity is matched with the motion track of the triangular rotor; the wall of the cavity is provided with a mounting hole communicated with the precombustion cavity, and the ignition device is mounted in the mounting hole; more than 2 jet holes penetrating through the cavity wall are formed in the cavity wall of the cavity, and the pre-combustion cavity is communicated with a combustion cavity of a main combustion chamber of the engine through the jet holes.
2. The precombustor of claim 1, wherein the cavity comprises a base and a cover, the base and the cover enclosing the precombustor, the cover being movably disposed within the base, the ignition device being mounted in the cover; the prechamber further comprises a drive assembly for driving the movement of the chamber cover.
3. The precombustor of claim 2, wherein said driving assembly comprises a linear moving mechanism and an elastic member, said linear moving mechanism and said elastic member are distributed on both sides of said chamber cover, and both ends of said elastic member respectively act on said chamber base and said chamber cover.
4. A prechamber according to claim 3, characterised in that the linear movement mechanism comprises a power element and a cam, which is connected to the output shaft of the power element and the outer surface of which acts on the cover.
5. A prechamber according to claim 2, characterised in that the top end of the chamber base has a recess and the chamber cover has a flange which extends into and is movably arranged in the recess; an axial gap is formed between the flange edge and the concave part, and the elastic piece is arranged in the axial gap.
6. The precombustor of any one of claims 1 to 5, wherein three apexes of said triangular rotor are in contact with an inner profile of said precombustor, thereby dividing said precombustor into 1 ignition region and 2 scavenging regions independent of each other, said ignition region communicating with said mounting hole, and said injection holes communicating with said ignition region and said combustion chamber; the cavity is provided with more than 1 scavenging hole for communicating the scavenging area with the combustion cavity.
7. A pre-chamber as claimed in any of claims 1 to 5, wherein more than 2 said orifices are spaced circumferentially of the cavity.
8. The precombustor of any one of claims 1-5, wherein said 2 or more orifices are disposed on the same cross-section of said cavity.
9. An engine comprising a main combustion chamber and the prechamber of any of claims 1-8, the main combustion chamber communicating with the prechamber through the orifices.
10. A vehicle characterized by comprising the engine of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111012234.4A CN113944542A (en) | 2021-08-31 | 2021-08-31 | Precombustion chamber, engine and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111012234.4A CN113944542A (en) | 2021-08-31 | 2021-08-31 | Precombustion chamber, engine and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113944542A true CN113944542A (en) | 2022-01-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111012234.4A Pending CN113944542A (en) | 2021-08-31 | 2021-08-31 | Precombustion chamber, engine and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113944542A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3785352A (en) * | 1971-09-29 | 1974-01-15 | Honda Motor Co Ltd | Rotary piston internal combustion engine |
| JP2007064027A (en) * | 2005-08-29 | 2007-03-15 | Nissan Motor Co Ltd | Auxiliary chamber type internal combustion engine |
| DE102019115234A1 (en) * | 2018-06-08 | 2019-12-12 | Caterpillar Inc. | Prechamber spark plug |
| WO2020196685A1 (en) * | 2019-03-27 | 2020-10-01 | 三菱自動車工業株式会社 | Sub-chamber internal combustion engine |
-
2021
- 2021-08-31 CN CN202111012234.4A patent/CN113944542A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3785352A (en) * | 1971-09-29 | 1974-01-15 | Honda Motor Co Ltd | Rotary piston internal combustion engine |
| JP2007064027A (en) * | 2005-08-29 | 2007-03-15 | Nissan Motor Co Ltd | Auxiliary chamber type internal combustion engine |
| DE102019115234A1 (en) * | 2018-06-08 | 2019-12-12 | Caterpillar Inc. | Prechamber spark plug |
| WO2020196685A1 (en) * | 2019-03-27 | 2020-10-01 | 三菱自動車工業株式会社 | Sub-chamber internal combustion engine |
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Application publication date: 20220118 |