CN112282992A - Silencing air intake system for vehicle - Google Patents
Silencing air intake system for vehicle Download PDFInfo
- Publication number
- CN112282992A CN112282992A CN202011166637.XA CN202011166637A CN112282992A CN 112282992 A CN112282992 A CN 112282992A CN 202011166637 A CN202011166637 A CN 202011166637A CN 112282992 A CN112282992 A CN 112282992A
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- China
- Prior art keywords
- resonant cavity
- air inlet
- intake system
- air intake
- silencing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 230000030279 gene silencing Effects 0.000 title claims abstract description 37
- 230000008030 elimination Effects 0.000 abstract description 10
- 238000003379 elimination reaction Methods 0.000 abstract description 10
- 238000013461 design Methods 0.000 abstract description 2
- 208000002925 dental caries Diseases 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000008859 change Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001743 silencing 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
- F02M35/10137—Flexible ducts, e.g. bellows or hoses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
- B60K13/02—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning intake
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1205—Flow throttling or guiding
- F02M35/1222—Flow throttling or guiding by using adjustable or movable elements, e.g. valves, membranes, bellows, expanding or shrinking elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
- F02M35/1266—Intake silencers ; Sound modulation, transmission or amplification using resonance comprising multiple chambers or compartments
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1283—Manufacturing or assembly; Connectors; Fixations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Transportation (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention provides a silencing air inlet system for a vehicle, and belongs to the field of vehicles. This noise elimination air intake system includes noise-abatement structure, the last air inlet duct assembly that links to each other and lower intake duct assembly, wherein, noise-abatement structure set up in go up the air inlet duct assembly with the junction of lower intake duct assembly, noise-abatement structure includes the resonant cavity, be equipped with at least one position adjustable baffle in the resonant cavity, be used for with the resonant cavity is separated for a plurality of volume adjustable cavitys, every the cavity all through a connecting pipe with lower intake duct assembly intercommunication, noise-abatement structure configures into through adjusting every the length of connecting pipe and/or every its noise elimination frequency is adjusted to the position of baffle. The silencing air inlet system has the advantages of wide application range, good platformization and strong universality, is favorable for reducing the cost, and can design a silencing structure by fully utilizing the space of the whole vehicle.
Description
Technical Field
The invention belongs to the field of vehicles, and particularly relates to a silencing air inlet system for a vehicle.
Background
With the development of economy, the quality of life of people is higher and higher, and the requirements on the driving experience of automobile products are more and more critical. The commercial vehicle, people are also more and more tending to the level of car to the driving experience and comfort while requiring low cost. The whole car factory faces the improvement of driving experience, and meanwhile, the pressure of cost is increased day by day. The air intake system is used as a key factor influencing the NVH of the whole vehicle, and the noise level of the air intake system directly influences the experience of a driver and passengers.
Commercial vehicle products in the current market achieve the purpose of eliminating fixed frequency noise through a resonant cavity fixed on an air inlet channel. And the diversity and the universality of the commercial vehicle carrying engine cause that the resonant cavity on the air inlet channel cannot meet the requirement of platform universality, and further a plurality of air inlet channel products and even dies need to be developed, so that the vehicle cost is high. When the frequency of the excitation source changes, the existing air intake system cannot be suitable for a new excitation source, and a new air intake silencing system needs to be developed again, so that the problems of high cost, long period and low efficiency are caused.
Disclosure of Invention
The invention aims to provide a silencing air inlet system for a vehicle, which has the advantages of wide application range, good platformization and strong universality and is beneficial to reducing the cost.
The invention also aims to design the noise elimination structure by fully utilizing the whole vehicle space.
In particular, the present invention provides a muffling air intake system for a vehicle, comprising a muffling structure, an upper intake duct assembly and a lower intake duct assembly connected, wherein,
the silencing structure is arranged at the joint of the upper air inlet channel assembly and the lower air inlet channel assembly, the silencing structure comprises a resonant cavity, at least one baffle with an adjustable position is arranged in the resonant cavity and used for separating the resonant cavity into a plurality of cavities with adjustable volumes, each cavity is communicated with the lower air inlet channel assembly through a connecting pipe, and the silencing structure is configured to adjust the silencing frequency of the silencing structure by adjusting the length of each connecting pipe and/or the position of each baffle.
Optionally, a plurality of slots arranged at intervals are formed in the resonant cavity and used for inserting the baffle.
Optionally, the plurality of grooves are arranged in an equally spaced arrangement.
Optionally, the resonant cavity is provided with a plurality of ribs protruding outward from an outer surface of the resonant cavity, a groove opening into the resonant cavity is defined in an inner portion of each rib, and the groove forms the slot.
Optionally, each rib extends at an outer surface of the resonant cavity, and each rib extends to an outer surface of at least three connected sidewalls of the resonant cavity.
Optionally, the plurality of slots are arranged in an equally spaced arrangement.
Optionally, the connecting pipe is a self-cutting pipe which can be cut according to requirements.
Optionally, the number of the baffle plates is one, and the baffle plates are used for dividing the resonant cavity into two cavities.
Optionally, the upper air duct assembly comprises an air flow channel and an upper air duct resonant cavity disposed at a side wall of the air flow channel.
Optionally, the bottom end of the upper air inlet assembly is provided with a corrugated pipe, and the lower air inlet assembly is connected with the corrugated pipe.
Optionally, the muffling air intake system is disposed on the rear right side of the cab of the vehicle.
Optionally, the upper air inlet duct assembly is fixedly connected with a cab body and a cab boat support of the vehicle, and the lower air inlet duct assembly is fixedly connected with a rear support of a cab of the vehicle.
The silencing structure can conveniently adjust the silencing frequency of the silencing structure by adjusting the length of each connecting pipe and/or the position of each partition plate, so that the silencing frequency of the whole silencing air inlet structure is adjusted, the silencing air inlet structure has the advantages of wide application range, good platformization and strong universality, and the cost is favorably reduced.
Further, since the sound attenuation structure does not occupy the airflow passages of the upper intake duct assembly and the lower intake duct assembly, new intake resistance is not caused.
Furthermore, the joint of the upper air inlet channel assembly and the lower air inlet channel assembly is located near a boat support in a cab of the vehicle, the position is usually large in space, a noise elimination structure is convenient to arrange, and the noise elimination structure is designed by fully utilizing the space of the whole vehicle.
Furthermore, the grooves in the invention are in a convex reinforcing rib structure on the outer surface of the resonant cavity, so that the overall strength and mode can be improved, and the reliability and durability can be further improved. That is to say, this recess can play the effect of convenient grafting baffle and reinforcing resonant cavity structure simultaneously.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic structural view of a muffling air intake system according to one embodiment of the present invention;
FIG. 2 is an enlarged partial view of a muffling air induction system according to one embodiment of the present invention;
FIG. 3 is a diagram of the internal structure of the resonant cavity of the muffled air induction system according to one embodiment of the present invention;
fig. 4 is a schematic structural view of a muffling air intake system according to an embodiment of the present invention, when it is mounted to a vehicle body.
Detailed Description
Fig. 1 is a schematic structural view of a muffling air intake system 100 according to an embodiment of the present invention. Fig. 2 is a partially enlarged view of the muffling air intake system 100 according to one embodiment of the present invention. Fig. 3 is a view showing the internal structure of the resonator 31 of the muffling air intake system 100 according to one embodiment of the present invention. Fig. 4 is a schematic structural view of the muffling air intake system 100 according to one embodiment of the present invention, when it is mounted to a vehicle body. As shown in fig. 1, in one embodiment, the muffling air intake system 100 for a vehicle of the present invention comprises a muffling structure 30, an upper air intake duct assembly 10 and a lower air intake duct assembly 20 connected to each other. The muffling structure 30 is disposed at the junction of the upper intake duct assembly 10 and the lower intake duct assembly 20. Generally, the sound attenuating structure 30 includes a resonant cavity 31. As shown in fig. 3, at least one position-adjustable baffle 33 is disposed in the resonant cavity 31 for dividing the resonant cavity 31 into a plurality of volume-adjustable cavities, each of which is communicated with the lower air inlet channel assembly 20 through a connecting pipe 32, and the sound-attenuating structure 30 is configured to adjust the sound-attenuating frequency thereof by adjusting the length of each connecting pipe 32 and/or the position of each baffle. Alternatively, the connecting tube 32 is a self-cutting tube that can be cut as desired.
In this embodiment, a silencing structure 30 is additionally arranged at a joint of the upper air inlet assembly 10 and the lower air inlet assembly 20, the silencing structure 30 includes a connecting pipe 32 and a resonant cavity 31, a baffle 33 with an adjustable position is arranged in the resonant cavity 31, so that the resonant cavity 31 is divided into a plurality of cavities, and the volume of each cavity can be controlled by adjusting the position of the baffle 33. For example, when noise sources such as an engine and the like change, the silencing volume of each cavity can be adjusted by adjusting the position of the baffle 33, so that the effect of adjusting the silencing frequency is achieved, and the silencing index of an air intake system is finally met. When the volume of each cavity cannot meet the requirement of the silencing index of the air inlet system only by adjusting the volume of each cavity, the silencing frequency of the two resonant cavities 31 can be adjusted by adjusting the length of each connecting pipe 32, and the silencing index of the air inlet system is finally met. That is, the invention can conveniently adjust the muffling frequency of the muffling structure 30 by adjusting the length of each connecting pipe 32 and/or the position of each partition plate, thereby adjusting the muffling frequency of the whole muffling air intake structure, so that the muffling air intake structure has the advantages of wide application range, good platformization, strong universality and contribution to reducing the cost.
Further, since the sound attenuation structure 30 does not occupy the air flow passages of the upper air intake duct assembly 10 and the lower air intake duct assembly 20, a new air intake resistance is not caused. In addition, as shown in fig. 4, generally, the joint of the upper air intake duct assembly 10 and the lower air intake duct assembly 20 is located near a cabin boat support of the vehicle, and the position is usually large in space, so that the sound attenuation structure 30 is convenient to arrange, and the sound attenuation structure 30 is designed by fully utilizing the space of the whole vehicle.
In one embodiment, the two ends of the connecting tube 32 are connected to the resonant cavity 31 and the lower air inlet channel assembly 20 by clamping.
As shown in fig. 3, in one embodiment, a plurality of slots 311 are formed in the resonant cavity 31 for inserting the baffle 33.
In a further embodiment, the cavity 31 is provided with a plurality of ribs protruding outwards from its outer surface, each rib defining a groove on its inside opening into the cavity, the grooves forming slots 311.
The slot 311 in this embodiment is a protruding rib structure on the outer surface of the resonant cavity 31, so that the overall strength and mode can be improved, and the reliability and durability can be further increased. That is, the slot 311 of the present embodiment can simultaneously serve to facilitate the insertion of the baffle 33 and strengthen the structure of the resonant cavity 31.
In a further embodiment, as shown in FIG. 3, the plurality of slots 311 are arranged in an equally spaced arrangement. Therefore, when the position of the baffle 33 is adjusted, the volume change of each cavity can be known more clearly, and the adjustment of the noise elimination frequency is facilitated.
In a further embodiment, as shown in FIG. 3, each rib extends over an outer surface of the cavity 31 and each rib extends to an outer surface of at least three connected sidewalls of the cavity 31. The slots 311 are arranged to better fix the baffle 33 and to better reinforce the strength of the resonant cavity 31. For example, the slot 311 on the side wall 312 of the resonant cavity 31 can play a role in guiding and limiting the insertion of the baffle 33, and the inserted position of the baffle 33 is conveniently inserted and fixed, so that the volume of each cavity after the baffle 33 is inserted cannot be changed at will, and the silencing effect caused by the change of the silencing frequency due to the change of the volume in the subsequent use process is poor after the silencing frequency which is debugged at first meets the requirement.
As shown in FIG. 4, in one embodiment, upper gas inlet duct assembly 10 includes a gas flow passage 11 and an upper gas inlet duct resonator 12 disposed at a side wall of the gas flow passage. The bottom end of the upper air inlet assembly 10 is provided with a corrugated pipe 13, and the lower air inlet assembly 20 is connected with the corrugated pipe 13. The upper intake duct assembly 10 is fixedly connected to the cab body 200 and the cab boat support 300 of the vehicle, and the lower intake duct assembly 20 is fixedly connected to the rear cab support of the vehicle. In fig. 4, a front wheel fender 400 is located below the cab boat support 300, the sound attenuation structure 3 is located right near a space between the cab boat support 300 and the front wheel fender 400, the space is large, and no other component needs to be arranged, so that sufficient space is provided for the arrangement of the sound attenuation structure 3, the length and the number of the connecting pipes 32 and the size of the resonant cavity 31 can be adjusted conveniently, and a foundation can be provided for the sound attenuation structure 3 to realize sound attenuation in a wider frequency range.
Generally, the upper intake duct assembly 10, the lower intake duct assembly 20, and the resonant cavity 31 are platform common parts, and will not change with different engines mounted on different vehicle models. The upper gas inlet channel cavity 12 described above is set for common frequencies and is generally fixed.
In a further embodiment, the number of the baffles 33 is one, and the resonant cavity 31 is divided into two cavities, i.e. a first cavity 301 and a second cavity 302 in fig. 3.
The upper air inlet duct resonant cavity 12 can eliminate a common fixed noise frequency, and is provided with two cavities with variable noise elimination frequencies, while the original noise of the air inlet system of the vehicle is common, namely three wave peaks, so that the system of the embodiment is completely enough to meet the noise elimination requirement of the air inlet system of most commercial vehicles.
As shown in fig. 4, in one embodiment, the muffling air intake system 100 is disposed at the rear right side of the cab of the vehicle. Since other components are generally required to be installed on the rear left side of the cab of the commercial vehicle, the noise elimination intake system 100 is installed on the rear right side of the cab to avoid interference, and the noise elimination structure 30 is designed by fully utilizing the whole vehicle space.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A silencing air inlet system for a vehicle is characterized by comprising a silencing structure, an upper air inlet channel assembly and a lower air inlet channel assembly which are connected, wherein,
the silencing structure is arranged at the joint of the upper air inlet channel assembly and the lower air inlet channel assembly, the silencing structure comprises a resonant cavity, at least one baffle with an adjustable position is arranged in the resonant cavity and used for separating the resonant cavity into a plurality of cavities with adjustable volumes, each cavity is communicated with the lower air inlet channel assembly through a connecting pipe, and the silencing structure is configured to adjust the silencing frequency of the silencing structure by adjusting the length of each connecting pipe and/or the position of each baffle.
2. The muffled air intake system of claim 1,
and a plurality of slots which are arranged at intervals are arranged in the resonant cavity and are used for inserting the baffle.
3. The muffled air intake system of claim 2,
the resonant cavity is provided with a plurality of ribs protruding outwards from the outer surface of the resonant cavity, grooves facing the inner opening of the resonant cavity are limited in the ribs, and the grooves form the slots.
4. The muffled air intake system of claim 3,
each rib extends on the outer surface of the resonant cavity, and each rib extends to the outer surface of at least three connected side walls of the resonant cavity.
5. The muffled air intake system of claim 4,
the plurality of slots are arranged in an equally spaced arrangement.
6. The muffling air intake system of any one of claims 1-5,
the connecting pipe is a self-cutting pipe which can be cut according to requirements.
7. The muffled air intake system of claim 6,
the number of the baffle plates is one, and the baffle plates are used for dividing the resonant cavity into two cavities.
8. The muffled air intake system of claim 1,
go up the air flue assembly include airflow channel with set up in the last air flue resonant cavity of airflow channel lateral wall department, the bottom of going up the air flue assembly sets up to the bellows, down the air flue assembly with the bellows links to each other.
9. The muffled air intake system of claim 8,
the silencing air intake system is arranged on the right side behind a cab of the vehicle.
10. The muffled air intake system of claim 9,
go up air inlet duct assembly with the driver's cabin automobile body and the driver's cabin boat support of vehicle are fixed continuous, lower air inlet duct assembly with support fixed connection behind the driver's cabin of vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011166637.XA CN112282992A (en) | 2020-10-27 | 2020-10-27 | Silencing air intake system for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011166637.XA CN112282992A (en) | 2020-10-27 | 2020-10-27 | Silencing air intake system for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112282992A true CN112282992A (en) | 2021-01-29 |
Family
ID=74372570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011166637.XA Pending CN112282992A (en) | 2020-10-27 | 2020-10-27 | Silencing air intake system for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112282992A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59105959A (en) * | 1982-12-09 | 1984-06-19 | Nippon Denso Co Ltd | Resonator |
| JPS60182348A (en) * | 1984-02-29 | 1985-09-17 | Hino Motors Ltd | Suction noise reducer for engine |
| JPH0518224A (en) * | 1991-07-05 | 1993-01-26 | Hino Motors Ltd | Variable volume type resonance device |
| US20050217626A1 (en) * | 2004-03-30 | 2005-10-06 | Toyoda Gosei Co., Ltd | Resonator |
| CN208870719U (en) * | 2018-08-29 | 2019-05-17 | 曼胡默尔滤清器（上海）有限公司 | A kind of middle low-frequency standard gas handling system acoustics tuning chamber |
-
2020
- 2020-10-27 CN CN202011166637.XA patent/CN112282992A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59105959A (en) * | 1982-12-09 | 1984-06-19 | Nippon Denso Co Ltd | Resonator |
| JPS60182348A (en) * | 1984-02-29 | 1985-09-17 | Hino Motors Ltd | Suction noise reducer for engine |
| JPH0518224A (en) * | 1991-07-05 | 1993-01-26 | Hino Motors Ltd | Variable volume type resonance device |
| US20050217626A1 (en) * | 2004-03-30 | 2005-10-06 | Toyoda Gosei Co., Ltd | Resonator |
| CN208870719U (en) * | 2018-08-29 | 2019-05-17 | 曼胡默尔滤清器（上海）有限公司 | A kind of middle low-frequency standard gas handling system acoustics tuning chamber |
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| PB01 | Publication | ||
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| TA01 | Transfer of patent application right |
Effective date of registration: 20211130 Address after: 310051 No. 1760, Jiangling Road, Hangzhou, Zhejiang, Binjiang District Applicant after: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Applicant after: ZHEJIANG GEELY NEW ENERGY COMMERCIAL VEHICLE GROUP Co.,Ltd. Applicant after: GEELY SICHUAN COMMERCIAL VEHICLE Co.,Ltd. Applicant after: JIANGXI GEELY NEW ENERGY COMMERCIAL VEHICLE Co.,Ltd. Applicant after: Zhejiang remote commercial vehicle R & D Co.,Ltd. Address before: 310051 No. 1760, Jiangling Road, Hangzhou, Zhejiang, Binjiang District Applicant before: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Applicant before: ZHEJIANG GEELY NEW ENERGY COMMERCIAL VEHICLE GROUP Co.,Ltd. Applicant before: GEELY SICHUAN COMMERCIAL VEHICLE Co.,Ltd. Applicant before: JIANGXI GEELY NEW ENERGY COMMERCIAL VEHICLE Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210129 |
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| RJ01 | Rejection of invention patent application after publication |