RO131280B1 - Exhaust-gas discharging device - Google Patents

Exhaust-gas discharging device Download PDF

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Publication number
RO131280B1
RO131280B1 ROA201600162A RO201600162A RO131280B1 RO 131280 B1 RO131280 B1 RO 131280B1 RO A201600162 A ROA201600162 A RO A201600162A RO 201600162 A RO201600162 A RO 201600162A RO 131280 B1 RO131280 B1 RO 131280B1
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RO
Romania
Prior art keywords
circular
exhaust
internal combustion
exhaust gases
exhaust gas
Prior art date
Application number
ROA201600162A
Other languages
Romanian (ro)
Other versions
RO131280A3 (en
RO131280A0 (en
Inventor
Dumitru Bădilă
Dragoş-Costin Manea
Original Assignee
Dumitru Bădilă
Dragoş-Costin Manea
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Dumitru Bădilă, Dragoş-Costin Manea filed Critical Dumitru Bădilă
Priority to ROA201600162A priority Critical patent/RO131280B1/en
Publication of RO131280A0 publication Critical patent/RO131280A0/en
Priority to PCT/RO2017/000003 priority patent/WO2017155422A1/en
Publication of RO131280A3 publication Critical patent/RO131280A3/en
Publication of RO131280B1 publication Critical patent/RO131280B1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00Silencing apparatus characterised by method of silencing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00Silencing apparatus characterised by method of silencing
    • F01N1/08Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/082Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00Silencing apparatus characterised by method of silencing
    • F01N1/08Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/085Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using a central core throttling gas passage
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00Silencing apparatus characterised by method of silencing
    • F01N1/08Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/086Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling having means to impart whirling motion to the gases
    • F01N1/088Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling having means to impart whirling motion to the gases using vanes arranged on gas flow path or gas flow tubes with tangentially directed apertures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08Other arrangements or adaptations of exhaust conduits
    • F01N13/082Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/20Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having flared outlets, e.g. of fish-tail shape
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00Structure or shape of gas passages, pipes or tubes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00Structure or shape of gas passages, pipes or tubes
    • F01N2470/02Tubes being perforated

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

The invention relates to a device for discharging the exhaust gases, intended for discharging exhaust gases and for attenuating the noise produced by the discharge systems of the internal combustion engines. The device for discharging the exhaust gases claimed by the invention, intended for discharging exhaust gases and for attenuating the noise produced by the discharge systems of the internal combustion engines, provided, at one end, with a flange for coupling to the exhaust conduit of an internal combustion engine and at the other end with a discharge flaring, alongside of it being provided some circular discharge orifices (c), protected by some circular protection shields (d and e), on the axis of the circular orifices (c) there being provided some circular damping filters (f), the circular shields (d and e) and the circular damping filters (f) having the shape of spherical domes.

Description

Invenția se referă la un dispozitiv de evacuare a gazelor de eșapament, destinat evacuării și atenuării zgomotului produs de sistemele de evacuare ale motoarelor cu ardere internă.The invention relates to an exhaust gas exhaust device for removing and mitigating the noise produced by the exhaust systems of internal combustion engines.

Se cunoaște, din stadiul tehnicii, documentul US 1938973, care prezintă un dispozitiv de evacuare a gazelor de eșapament, destinat atenuării zgomotului produs la eliminarea gazelor de eșapament la motoarele cu ardere internă. Dispozitivul este alcătuit dintr-o multitudine de carcase montate concentric, având deschiderile obturate cu ajutorul unor capace ce delimitează un colector de intrare a gazelor și unul de ieșire a acestora. Carcasa interioară face legătura între cele două colectoare, permițând trecerea gazelor arse, iar pe o mare parte a suprafeței este prevăzută cu o multitudine de mici perforații apropiate. Se creează astfel o comunicare între cealaltă carcasă concentrică interioară, unde este format un spațiu de atenuare a undelor sonore, prevăzut cu niște plăci rezonatoare tronconice. în cazul în care perforațiile sunt produse printr-o simplă ștanțare sau tăiere în afara carcasei interioare, trecerea gazelor prin aceste perforații se face cu un zgomot gen “fluierat”. Pentru eliminarea acestui “fluierat”, perforațiile sunt efectuate într-o formă tronconică, cu marginile rotunjite, din mantaua carcasei interioare.It is known, from the prior art, the document US 1938973, which presents an exhaust gas exhaust device, intended to mitigate the noise produced when removing the exhaust gases in internal combustion engines. The device consists of a plurality of concentricly mounted enclosures, having the openings obtained by means of caps which delimit a gas inlet and an outlet. The inner casing connects the two manifolds, allowing the passage of the flue gas, and on a large part of the surface is provided with a multitude of small perforations nearby. This creates a communication between the other inner concentric housing, where a space for attenuation of sound waves is formed, provided with some truncated resonator plates. If the perforations are produced by simply stamping or cutting outside the inner casing, the passage of gas through these perforations is made with a "whistling" noise. To eliminate this "whistle", the perforations are made in a truncated shape, with rounded edges, from the inner shell casing.

Se mai știe și documentul RO 100469, care prezintă un amortizor de zgomot utilizat pentru atenuarea zgomotului la sistemul de evacuare al motoarelor cu ardere internă pentru autovehicule. Amortizorul de zgomot cuprinde un canal colector care, la partea din amonte, se cuplează la o conductă de evacuare a gazelor de eșapament, iar la partea din aval, cu un al doilea canal cu rețele depresive, canal format din două flanșe. La ieșirea din amortizor este montat un con dublu. Canalul colector, cele două flanșe și conul dublu sunt montate astfel încât între ele să se formeze niște fante. La partea din aval, flanșele au prelucrați niște voleți depresivi, orientați cu intradosul către aval, iar alezajele interioare tronconice ale flanșelor sunt orientate cu diametrele de intrare dinspre amonte spre aval, ieșirea gazelor realizându-se în jurul conului dublu. Atenuarea zgomotului se realizează ca urmare a difracției undelor sonore la traversarea rețelelor depresive formate de voleți și fantele adiacente acestora la extrados, absorbția undelor sonore care au suferit difracția obținându-se prin intensificarea amestecului turbulent dintre jeturile elementare care părăsesc fantele și aerul ambiant, datorită zonelor depresionare de pe extradosul voleților, generate prin efect Coandă.It is also known the document RO 100469, which presents a noise damper used to mitigate noise in the exhaust system of internal combustion engines for vehicles. The noise damper comprises a manifold channel which, at the upstream side, is coupled to an exhaust pipe, and at the downstream side, with a second channel with depressive networks, a channel formed by two flanges. At the exit of the shock absorber is mounted a double cone. The collector channel, the two flanges and the double cone are mounted so that some slots form between them. At the downstream side, the flanges have been processed some depressive vaults, oriented with the soffit downstream, and the inner truncated boreholes of the flanges are oriented with the inlet diameters from upstream to downstream, the gas outlet being around the double cone. The attenuation of the noise is realized as a result of the diffraction of the sound waves when crossing the depressive networks formed by vaults and the slots adjacent to them to the extrados ones, the absorption of the sound waves that have undergone the diffraction being obtained by intensifying the turbulent mixture between the elementary jets that leave the slots and the ambient air, due to the zones depression on the extrusion of the voles, generated by the Coandă effect.

De asemenea, este cunoscut și documentul US 4192403, care prezintă un dispozitiv de evacuare a gazelor de eșapament, destinat atenuării zgomotului produs la evacuarea gazelor arse la motoarele cu ardere internă. Dispozitivul este format dintr-o carcasă exterioară de formă cilindrică, închisă la capete cu niște plăci de capăt, iar la mijloc este prevăzut un perete despărțitor care delimitează două camere de expansiune, una frontală, respectiv cealaltă posterioară. Peretele despărțitor este prevăzut cu o multitudine de perforații, astfel încât cele două camere de expansiune comunică între ele. O conductă de evacuare a gazelor pătrunde prin placa de capăt frontală și traversează peretele despărțitor până în interiorul camerei de expansiune posterioară, unde este închisă cu un element de închidere de forma unui capac. Din camera de expansiune posterioară pleacă o conductă de evacuare a gazelor arse către exterior. Dispozitivul fiind astfel structurat, undele sonore sunt atenuate și reduse spre zero, în interiorul celor două camere de expansiune, cât și datorită peretelui despărțitor.Also known is the document US 4192403, which presents an exhaust gas exhaust device, intended to mitigate the noise produced when exhaust gases are burned in internal combustion engines. The device consists of a cylindrical outer casing, closed at the ends with some end plates, and in the middle is provided a dividing wall that delimits two expansion chambers, one front and the other rear. The partition wall is provided with a multitude of perforations, so that the two expansion chambers communicate with each other. A gas exhaust pipe enters through the front end plate and passes through the partition wall to the inside of the rear expansion chamber, where it is closed with a closure element in the form of a lid. From the rear expansion chamber, an exhaust flue pipe exits. The device being thus structured, the sound waves are attenuated and reduced to zero, inside the two expansion chambers, as well as due to the partition wall.

Se mai cunoaște și documentul GB 2021195 A, care prezintă un dispozitiv de evacuare a gazelor de eșapament și destinat atenuării zgomotului produs, pentru un tractor agricol. Dispozitivul este format dintr-un corp tubular de formă eliptică în secțiune transversală, închis la fiecare dintre capete printr-un perete frontal, respectivii pereți frontali fiindAlso known is document GB 2021195 A, which presents an exhaust gas exhaust device intended to mitigate the noise produced, for an agricultural tractor. The device consists of a tubular body of elliptical shape in cross section, closed at each end by a front wall, the respective front walls being

RO 131280 Β1 traversați de o conductă de admisie a gazelor arse, respectiv de evacuare a gazelor. La 1 fiecare din capetele dispozitivului, în interior, niște plăci concave delimitează câte două camere de rezonanță, de lungimi diferite, astfel alese pentru a atenua diferitele frecvențe ale 3 zgomotului produs de evacuarea gazelor.EN 131280 Β1 crossed by a flue gas inlet pipe, respectively a gas outlet. At each of the ends of the device, inside, some concave plates delimit two resonance chambers, of different lengths, so chosen to attenuate the different frequencies of the 3 noise produced by the gas exhaust.

Este cunoscut și un dispozitiv de evacuare a gazelor de eșapament, prezentat în 5 modelul de utilitate CN 201367931 Y, ce are o carcasă exterioară, care formează o cameră de rezonanță, în interiorul căreia este prevăzută o conductă perforată, precum și niște plăci 7 de compresie și izolare a sunetelor, între care se formează niște camere de rezonanță și niște camere de expansiune. 9Also known is an exhaust gas exhaust device, presented in 5 utility model CN 201367931 Y, which has an outer housing, which forms a resonance chamber, inside which is provided a perforated pipe, as well as some plates 7. sound compression and isolation, between which resonance chambers and expansion chambers are formed. 9

Este cunoscut, de asemenea, un dispozitiv de evacuare a gazelor de eșapament, prezentat în „Teoria, calculul și construcția motoarelor pentru autovehicule rutiere”, 11 Berthold Grunwald, EDP, București, 1980, pp. 629-630, ce are o carcasă în care sunt prevăzute niște filtre, așezate în paralel, care au forma unor calote sferice. 13Also known is an exhaust gas exhaust device, presented in "Theory, calculation and construction of engines for road vehicles", 11 Berthold Grunwald, EDP, Bucharest, 1980, pp. 629-630, which has a housing in which are provided with filters, placed in parallel, which are shaped like spherical caps. 13

Problema tehnică pe care o rezolvă invenția constă în atenuarea zgomotului produs la evacuarea gazelor de eșapament ale motoarelor cu ardere internă. 15The technical problem that the invention solves is to mitigate the noise produced when the exhaust gases of the internal combustion engines are exhausted. 15

Dispozitivul de evacuare a gazelor de eșapament, conform invenției, constă dintr-un dispozitiv de evacuare a gazelor de eșapament, care cuprinde o conductă centrală de 17 evacuare a gazelor de ardere ale unui motor cu ardere internă prevăzută de-a lungul său cu niște orificii de evacuare circulare, fiind prevăzută la un capăt cu o flanșă de cuplare la con- 19 ducta de evacuare a motorului, iar la celălalt capăt cu o evazare de evacuare, orificiile de evacuare circulare sunt protejate de niște scuturi circulare, iar pe axa orificiilor circulare sunt 21 prevăzute niște filtre de amortizare, circulare.The exhaust gas exhaust device according to the invention consists of an exhaust gas exhaust device, which comprises a central pipe of 17 exhaust gases of an internal combustion engine provided along it with holes. circular outlet, being provided at one end with a coupling flange to the engine outlet conduit, and at the other end with an exhaust outlet, the circular outlet holes are protected by circular shields, and on the axis of the circular holes there are 21 provided damping filters, circular.

Dispozitivul de evacuare a gazelor de eșapament, conform invenției, prezintă urmă- 23 toarele avantaje:The exhaust gas exhaust device according to the invention has the following 23 advantages:

- construcție simplă; 25- simple construction; 25

- reducerea emisiilor poluante:- reducing pollutant emissions:

- creșterea puterii motorului și reducerea substanțială a zgomotului produs la 27 evacuarea gazelor de eșapament.- Increased engine power and substantially reduced noise produced by exhaust exhaust.

Se dă, în continuare, un exemplu de realizare a invenției, în legătură și cu fig. 1 și 2, 29 care reprezintă:An example of embodiment of the invention is given below, in connection with FIG. 1 and 2, 29 which represent:

- fig. 1, secțiune longitudinală prin dispozitivul de evacuare a gazelor de eșapament; 31FIG. 1, longitudinal section through the exhaust gas discharge device; 31

- fig. 2, secțiune transversală prin dispozitivul de evacuare a gazelor de eșapament, cu un plan A-A, redat în fig. 1. 33FIG. 2, a cross-section through the exhaust gas exhaust device, with an A-A plane, shown in fig. 1. 33

Dispozitivul de evacuare a gazelor de eșapament, conform invenției, este prevăzut cu o conductă 1 centrală de evacuare a gazelor de ardere ale unui motor cu ardere internă, 35 neredat în desen, care se cuplează, într-un mod în sine cunoscut, cum ar fi, de exemplu, cu niște bride și șuruburi, la o conductă de evacuare a motorului cu ardere internă, de 37 asemenea neredată în desen.The exhaust gas exhaust device according to the invention is provided with a central exhaust pipe 1 for the exhaust gas of an internal combustion engine, 35 not shown in the drawing, which engages in a manner known per se, such as be, for example, with some clamps and screws, to an exhaust pipe of the internal combustion engine, 37 also not shown in the drawing.

Conducta 1 centrală de evacuare a gazelor de ardere este prevăzută, la un capăt, 39 cu o flanșă a de cuplare la conducta de evacuare a unui motor cu ardere internă, iar la celălalt capăt cu o evazare b de evacuare. De-a lungul conductei 1 centrală de evacuare 41 sunt prevăzute niște orificii c de evacuare, circulare, protejate de niște scuturi d și e de evacuare, circulare. 43The flue gas central exhaust pipe 1 is provided, at one end, 39 with a coupling flange a to the exhaust pipe of an internal combustion engine, and at the other end with an exhaust escape b. Along the central pipe 1 of evacuation 41, there are provided some holes c of evacuation, circular, protected by shields d and e of evacuation, circular. 43

Pe conducta 1 centrală de evacuare a gazelor de ardere, pe axa orificiilor c circulare, sunt prevăzute niște filtre f de amortizare, circulare, cu rol de disipare a energiei acustice sub 45 formă de căldură prin frecările interioare ale straturilor de gaze arse, precum și prin frecările cu pereții acestora. 47On the central exhaust pipe 1, on the axis of the circular holes, there are provided damping filters, circular, with the role of dissipating the acoustic energy under 45 form of heat through the internal friction of the flue gas layers, as well as by rubbing them with their walls. 47

Scuturile d și e circulare, precum și filtrele f de amortizare, circulare, au forma unor calote sferice. 49The circular shields d and e, as well as the damping filters, circular, have the shape of spherical caps. 49

Claims (2)

1 Revendicări1 Claims 3 1. Dispozitiv de evacuare a gazelor de eșapament, care cuprinde o conductă (1) centrală de evacuare a gazelor de ardere ale unui motor cu ardere internă prevăzută de-a3 1. Exhaust gas exhaust device, comprising a central exhaust pipe (1) for the exhaust gas of an internal combustion engine provided 5 lungul său cu niște orificii (c) de evacuare circulare, fiind prevăzută la un capăt cu o flanșă (a) de cuplare la conducta de evacuare a motorului, iar la celălalt capăt cu o evazare (b) de5 its length with some circular outlet (c), being provided at one end with a flange (a) coupling to the engine outlet pipe, and at the other end with an escape (b) of 7 evacuare, caracterizat prin aceea că orificiile (c) de evacuare circulare sunt protejate de niște scuturi (d, e) circulare, iar pe axa orificiilor (c) circulare sunt prevăzute niște filtre (f) de7 evacuation, characterized in that the circular discharge holes (c) are protected by circular shields (d, e), and on the axis of the circular holes (c) are provided filters (f). 9 amortizare, circulare.9 amortization, circular. 2. Dispozitiv de evacuare a gazelor de eșapament, conform revendicării 1, caracte11 rizat prin aceea că scuturile (d, e) circulare și filtrele (f) de amortizare circulare au forma unor calote sferice.Exhaust gas discharge device according to claim 1, characterized in that the circular shields (d, e) and circular damping filters (f) are shaped like spherical caps.
ROA201600162A 2016-03-08 2016-03-08 Exhaust-gas discharging device RO131280B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ROA201600162A RO131280B1 (en) 2016-03-08 2016-03-08 Exhaust-gas discharging device
PCT/RO2017/000003 WO2017155422A1 (en) 2016-03-08 2017-03-07 Exhaust-gas discharging device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ROA201600162A RO131280B1 (en) 2016-03-08 2016-03-08 Exhaust-gas discharging device

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RO131280A0 RO131280A0 (en) 2016-07-29
RO131280A3 RO131280A3 (en) 2017-09-29
RO131280B1 true RO131280B1 (en) 2018-06-29

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WO (1) WO2017155422A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230349317A1 (en) * 2022-04-28 2023-11-02 Ford Global Technologies, Llc Sound modification apparatus for a turbocharged engine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR500509A (en) * 1918-10-22 1920-03-16 Hugo Schneebeli Quiet
CH397331A (en) * 1962-11-19 1965-08-15 Knecht Johann End piece for the exhaust pipe of vehicle internal combustion engines
IT7853327V0 (en) * 1978-05-17 1978-05-17 Fiat Spa EXHAUST SILENCER FOR AGRICULTURAL TRACTORS
CN201367931Y (en) 2009-01-12 2009-12-23 昆明通晟汽车配件有限责任公司 Impedance composite high-efficient engine muffler
US8534056B2 (en) * 2009-07-27 2013-09-17 International Truck Intellectual Property Company, Llc Temperature control device

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RO131280A3 (en) 2017-09-29
WO2017155422A1 (en) 2017-09-14
RO131280A0 (en) 2016-07-29

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