IT990519B - Dispositivo per ridurre i componenti dannosi nell emissione dei gas di scarico in macchine a combustione interna - Google Patents

Dispositivo per ridurre i componenti dannosi nell emissione dei gas di scarico in macchine a combustione interna

Info

Publication number
IT990519B
IT990519B IT34074/72A IT3407472A IT990519B IT 990519 B IT990519 B IT 990519B IT 34074/72 A IT34074/72 A IT 34074/72A IT 3407472 A IT3407472 A IT 3407472A IT 990519 B IT990519 B IT 990519B
Authority
IT
Italy
Prior art keywords
emission
reduce
internal combustion
exhaust gases
harmful components
Prior art date
Application number
IT34074/72A
Other languages
English (en)
Original Assignee
Bosch Gmbh Robert
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.)
Filing date
Publication date
Application filed by Bosch Gmbh Robert filed Critical Bosch Gmbh Robert
Application granted granted Critical
Publication of IT990519B publication Critical patent/IT990519B/it

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1477—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation circuit or part of it,(e.g. comparator, PI regulator, output)
    • F02D41/1482—Integrator, i.e. variable slope
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1473—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method
    • F02D41/1474—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method by detecting the commutation time of the sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2700/00—Mechanical control of speed or power of a single cylinder piston engine
    • F02D2700/02—Controlling by changing the air or fuel supply
    • F02D2700/0217—Controlling by changing the air or fuel supply for mixture compressing engines using liquid fuel
    • F02D2700/0225—Control of air or mixture supply
    • F02D2700/0228—Engines without compressor
    • F02D2700/023—Engines without compressor by means of one throttle device
    • F02D2700/0241—Engines without compressor by means of one throttle device depending on another parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2700/00—Mechanical control of speed or power of a single cylinder piston engine
    • F02D2700/09—Other ways of controlling

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
IT34074/72A 1972-02-10 1972-12-29 Dispositivo per ridurre i componenti dannosi nell emissione dei gas di scarico in macchine a combustione interna IT990519B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2206276A DE2206276C3 (de) 1972-02-10 1972-02-10 Verfahren und Vorrichtung zur Verminderung von schädlichen Anteilen der Abgasemission von Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
IT990519B true IT990519B (it) 1975-07-10

Family

ID=5835604

Family Applications (1)

Application Number Title Priority Date Filing Date
IT34074/72A IT990519B (it) 1972-02-10 1972-12-29 Dispositivo per ridurre i componenti dannosi nell emissione dei gas di scarico in macchine a combustione interna

Country Status (8)

Country Link
US (1) US3782347A (it)
JP (1) JPS554942B2 (it)
CH (1) CH544218A (it)
DE (1) DE2206276C3 (it)
FR (1) FR2171413B1 (it)
GB (1) GB1395276A (it)
IT (1) IT990519B (it)
SE (1) SE378282B (it)

Families Citing this family (93)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4084562A (en) * 1972-08-08 1978-04-18 Robert Bosch Gmbh Fuel metering device
US4364356A (en) * 1972-09-06 1982-12-21 Uop Inc. Exhaust emissions control system
DE2245029C3 (de) * 1972-09-14 1981-08-20 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und Vorrichtung zur Abgasentgiftung von Brennkraftmaschinen
US4287865A (en) * 1972-09-18 1981-09-08 The Bendix Corporation Closed loop engine control system
US4040394A (en) * 1972-09-14 1977-08-09 Robert Bosch Gmbh Apparatus repetitively controlling the composition of exhaust emissions from internal combustion engines, in predetermined intervals
US3815561A (en) * 1972-09-14 1974-06-11 Bendix Corp Closed loop engine control system
DE2247656C3 (de) * 1972-09-28 1981-12-17 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zum Regeln des Verhältnisses der Kraftstoff- und Luftanteile des Betriebsgemisches einer Brennkraftmaschine
DE2321721C2 (de) * 1973-04-28 1982-12-16 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zur Minderung von schädlichen Anteilen der Abgasemission von Brennkraftmaschinen
DE2251167C3 (de) * 1972-10-19 1986-07-31 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zur Abgasentgiftung von Brennkraftmaschinen
JPS4972524A (it) * 1972-11-17 1974-07-12
US4015426A (en) * 1972-11-20 1977-04-05 Nippondenso Co., Ltd. Fuel control system
DE2301354C3 (de) * 1973-01-12 1981-03-12 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zum Regeln des Kraftstoff-Luftverhältnisses bei Brennkraftmaschinen
DE2301353A1 (de) * 1973-01-12 1974-07-25 Bosch Gmbh Robert Regeleinrichtung zur abgasentgiftung von brennkraftmaschinen
GB1465052A (en) * 1973-02-20 1977-02-23 Lucas Electrical Ltd Fuel control systems
US3906910A (en) * 1973-04-23 1975-09-23 Colt Ind Operating Corp Carburetor with feedback means and system
US3916170A (en) * 1973-04-25 1975-10-28 Nippon Denso Co Air-fuel ratio feed back type fuel injection control system
USRE29741E (en) * 1973-04-25 1978-08-22 Nippondenso Co., Ltd. Air-fuel ratio feed back type fuel injection control system
JPS50229A (it) * 1973-05-09 1975-01-06
JPS5213250B2 (it) * 1973-05-31 1977-04-13
DE2327801C3 (de) * 1973-06-01 1980-01-03 Volkswagenwerk Ag, 3180 Wolfsburg Anordnung zur Gewinnung eines Drehzahlsignals für eine elektronische Kraftstoffeinspritzeinrichtung
US4036186A (en) * 1973-06-04 1977-07-19 Nippon Soken, Inc. Air-fuel mixture ratio correcting system for carburetor
DE2333743C2 (de) * 1973-07-03 1983-03-31 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und Vorrichtung zur Abgasentgiftung von Brennkraftmaschinen
DE2337198C2 (de) * 1973-07-21 1981-09-17 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zur Verminderung der schädlichen Anteile des Abgases
DE2422938C2 (de) * 1974-05-11 1982-07-08 Robert Bosch Gmbh, 7000 Stuttgart Schalteinrichtung zur geregelten Zugabe von Zusatzluft zum Abgas einer Brennkraftmaschine
JPS5114535A (en) * 1974-07-24 1976-02-05 Nissan Motor Nainenkikanno nenryoseigyoyohisengataseigyosochi
DE2448306C2 (de) * 1974-10-10 1983-12-08 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzanlage
JPS51106828A (ja) * 1975-03-18 1976-09-22 Nissan Motor Kunenpiseigyosochi
GB1524670A (en) * 1974-10-21 1978-09-13 Nissan Motor Apparatus for controlling the air-fuel mixture ratio of internal combustion engine
DE2547576A1 (de) * 1974-10-25 1976-04-29 Nissan Motor Vorrichtung zur steuerung des luft-brennstoff-verhaeltnisses fuer eine brennkraftmaschine
JPS5153131A (en) * 1974-11-01 1976-05-11 Nissan Motor Kikaki
GB1532989A (en) * 1974-11-06 1978-11-22 Nissan Motor Method of and device for controlling solenoid operated flow control means
US3939654A (en) * 1975-02-11 1976-02-24 General Motors Corporation Engine with dual sensor closed loop fuel control
US4300507A (en) * 1975-02-25 1981-11-17 The Bendix Corporation System controlling any air/fuel ratio with stoichiometric sensor and asymmetrical integration
JPS51117231A (en) * 1975-04-08 1976-10-15 Nissan Motor Co Ltd Air-fuel ratio control system
SE411784B (sv) * 1975-04-18 1980-02-04 Bosch Gmbh Robert Sett och anordning for bestemning av varaktighet av brensletillforselpulser
JPS51124739A (en) * 1975-04-24 1976-10-30 Nissan Motor Co Ltd An air fuel ratio control apparatus
JPS51136035A (en) * 1975-05-20 1976-11-25 Nissan Motor Co Ltd Air fuel mixture rate control device
JPS584177B2 (ja) * 1975-05-28 1983-01-25 トヨタ自動車株式会社 電子制御噴射エンジンの帰還式空燃比制御装置
JPS5815648Y2 (ja) * 1975-06-03 1983-03-30 日産自動車株式会社 クウネンビセイギヨソウチ
US4178884A (en) * 1975-06-05 1979-12-18 Nippondenso Co., Ltd. Method and system to control the mixture air-to-fuel ratio
US4111162A (en) * 1975-06-10 1978-09-05 Nippondenso Co., Ltd. Method and system for controlling the mixture air-to-fuel ratio
JPS5824609B2 (ja) * 1975-06-17 1983-05-23 株式会社デンソー 空燃比帰還式燃料噴射制御装置
JPS51149421A (en) * 1975-06-18 1976-12-22 Nissan Motor Co Ltd Air-fuel ratio control device
GB1554234A (en) * 1975-07-08 1979-10-17 Bosch Gmbh Robert Fuel supply systems for internal combustion engines
US3990411A (en) * 1975-07-14 1976-11-09 Gene Y. Wen Control system for normalizing the air/fuel ratio in a fuel injection system
JPS5229537A (en) * 1975-09-01 1977-03-05 Nissan Motor Co Ltd Ratio of air to fuel control device
US4210106A (en) * 1975-10-13 1980-07-01 Robert Bosch Gmbh Method and apparatus for regulating a combustible mixture
JPS5248729A (en) * 1975-10-16 1977-04-19 Nissan Motor Co Ltd Air-fuel ratio controller
JPS5281438A (en) * 1975-12-27 1977-07-07 Nissan Motor Co Ltd Air fuel ratio controller
JPS5281435A (en) * 1975-12-27 1977-07-07 Nissan Motor Co Ltd Air fuel ratio controller
US4024706A (en) * 1976-01-07 1977-05-24 Ford Motor Company Method of improving the operational capacity of three-way catalysts
DE2604160C2 (de) * 1976-02-04 1985-08-08 Robert Bosch Gmbh, 7000 Stuttgart Regeleinrichtung zur Beeinflussung des einer Brennkraftmaschine zugeführten Betriebsgemisches
JPS6010170B2 (ja) * 1976-02-12 1985-03-15 日産自動車株式会社 空燃比制御装置
DE2606625C2 (de) * 1976-02-19 1984-02-02 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zur Verminderung von schädlichen Anteilen der Abgase von Brennkraftmaschinen
JPS52114826A (en) * 1976-03-22 1977-09-27 Toyota Motor Corp Feedback type electronic controller for a fuel injection type internal combustion engine
JPS52145223U (it) * 1976-04-30 1977-11-04
JPS52135923A (en) * 1976-05-08 1977-11-14 Nissan Motor Co Ltd Air fuel ratio control equipment
JPS52154930A (en) * 1976-05-22 1977-12-23 Bosch Gmbh Robert Device for controlling fuellair ratio of mixture for internal combustion engine
DE2649271C2 (de) * 1976-06-11 1985-08-08 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zur Verhinderung von Regelschwingungen bei einer eine Brennkraftmaschine mit Betriebsgemisch versorgenden Gemischaufbereitungsanlage
IT1084410B (it) * 1976-08-25 1985-05-25 Bosch Gmbh Robert Dispositivo per determinare la quantita' di carburante addotta per iniezione ad un motore endotermico, ovvero dispositivo regolatore del rapporto di miscelazione per la miscela di esercizio da addurre ad un motore endotermico.
DE2702863C2 (de) * 1977-01-25 1986-06-05 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und Vorrichtung zur Regelung der Gemischverhältnisanteile des einer Brennkraftmaschine zugeführten Betriebsgemischs
JPS5924247B2 (ja) * 1977-01-28 1984-06-08 株式会社日本自動車部品総合研究所 内燃機関の排気ガス浄化装置
CA1079591A (en) * 1977-02-11 1980-06-17 Thomas R. Gantzert Apparatus for controlling the air-fuel ratio in an internal combustion engine
US4197822A (en) * 1977-02-14 1980-04-15 Colt Industries Operating Corp. Circuit means and apparatus for controlling the air-fuel ratio supplied to a combustion engine
US4169439A (en) * 1977-03-21 1979-10-02 Colt Industries Operating Corp. Circuit means and apparatus for controlling the air-fuel ratio supplied to a combustion engine
DE2709215A1 (de) * 1977-03-03 1978-09-07 Bosch Gmbh Robert Ueberwachungsschaltung fuer die abgaszusammensetzung bei brennkraftmaschinen
DE2713988A1 (de) * 1977-03-30 1978-10-05 Bosch Gmbh Robert Verfahren und einrichtung zur bestimmung der verhaeltnisanteile des einer brennkraftmaschine zugefuehrten kraftstoff-luftgemisches
US4150645A (en) * 1977-08-19 1979-04-24 Colt Industries Operating Corp. Circuit means and apparatus for controlling the air-fuel ratio supplied to a combustion engine
US4202301A (en) * 1977-08-31 1980-05-13 Engelhard Minerals & Chemicals Corporation Oxygen sensor control system
US4167924A (en) * 1977-10-03 1979-09-18 General Motors Corporation Closed loop fuel control system having variable control authority
US4241710A (en) * 1978-06-22 1980-12-30 The Bendix Corporation Closed loop system
JPS5535181A (en) * 1978-09-05 1980-03-12 Nippon Denso Co Ltd Air fuel ratio control device
JPS5537562A (en) * 1978-09-08 1980-03-15 Nippon Denso Co Ltd Air-fuel ratio control system
JPS5732036A (en) * 1980-08-05 1982-02-20 Honda Motor Co Ltd Air/fuel ratio feedback control device for internal combustion engine
JPS5751936A (en) * 1980-09-12 1982-03-27 Hitachi Ltd Controlling and trouble discrimination initializing timing setting system for engine controller
JPS5793668A (en) * 1980-12-03 1982-06-10 Toyota Motor Corp Air fuel ratio control unit for internal combustion engine
US4526001A (en) * 1981-02-13 1985-07-02 Engelhard Corporation Method and means for controlling air-to-fuel ratio
US4397278A (en) * 1981-04-03 1983-08-09 Ford Motor Company Air fuel ratio control using time-averaged error signal
DE3124676A1 (de) * 1981-06-24 1983-01-13 Robert Bosch Gmbh, 7000 Stuttgart Elektronisch gesteuertes kraftstoffzumesssystem
DE3149096A1 (de) * 1981-12-11 1983-06-16 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur lambda-regelung bei einer brennkraftmaschine sowie entsprechendes regelsystem
JPS58172442A (ja) * 1982-04-01 1983-10-11 Nippon Denso Co Ltd 空燃比制御装置
JPS59103938A (ja) * 1982-12-03 1984-06-15 Fuji Heavy Ind Ltd アイドル自動調速装置
JPS5994974U (ja) * 1982-12-18 1984-06-27 自動車機器株式会社 舵取装置における出力軸のダストカバ−装置
FR2544802B1 (fr) * 1983-04-19 1988-07-22 Mitsubishi Electric Corp Dispositif de commande de reglage d'allumage pour moteurs a combustion interne
DE3327156A1 (de) * 1983-07-28 1985-02-07 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und vorrichtung zur (lambda)-regelung des kraftstoffgemisches fuer eine brennkraftmaschine
JPS6038526A (ja) * 1983-08-11 1985-02-28 Fuji Heavy Ind Ltd 空燃比制御装置
FR2592685B1 (fr) * 1986-01-06 1989-12-29 Renault Procede de dosage de carburant pour moteur a combustion interne a injection electronique.
JPS6285147A (ja) * 1986-06-16 1987-04-18 Nissan Motor Co Ltd 空燃比制御装置
US5503134A (en) * 1993-10-04 1996-04-02 Ford Motor Company Fuel controller with air/fuel transient compensation
US5390490A (en) * 1993-11-04 1995-02-21 Ford Motor Company Method and apparatus for measuring the efficacy of a catalytic converter
US6196205B1 (en) 1999-07-12 2001-03-06 Dana Corporation Fuel control system for gas-operated engines
CN104898719B (zh) * 2015-06-19 2017-11-14 邓静秋 污染源voc浓度及排放总量实时监控系统
CN112255911A (zh) * 2020-10-19 2021-01-22 厦门五福印务有限公司 一种pid控制模块及印刷废气排放控制系统

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2244669A (en) * 1936-08-01 1941-06-10 Askania Werke Ag Control device for the fuel feed of internal combustion engines
US3017749A (en) * 1957-06-10 1962-01-23 Heppler Herbert Temperature responsive gas turbine fuel control with multi-rate feedback
US3070735A (en) * 1959-09-28 1962-12-25 Bendix Corp Servo system
US3076312A (en) * 1960-01-29 1963-02-05 Lucas Industries Ltd Fuel supply control for gas turbine engines
US3154060A (en) * 1962-11-05 1964-10-27 Hundere Alf Reciprocating-piston gasoline engine fuel-air ratio control
US3514377A (en) * 1967-11-27 1970-05-26 Gen Electric Measurement of oxygen-containing gas compositions and apparatus therefor
US3520133A (en) * 1968-03-14 1970-07-14 Gen Electric Gas turbine control system
US3616408A (en) * 1968-05-29 1971-10-26 Westinghouse Electric Corp Oxygen sensor
NL156787B (nl) * 1969-03-22 1978-05-16 Philips Nv Inrichting voor de automatische regeling van de lucht-brandstofverhouding van het aan een verbrandingsmotor toegevoerde mengsel.
US3616274A (en) * 1969-11-24 1971-10-26 Gen Motors Corp Method and apparatus for monitoring exhaust gas
FR2142642B1 (it) * 1971-06-22 1973-05-25 Peugeot & Renault
US3691405A (en) * 1971-08-10 1972-09-12 Ultra Electronics Ltd Thermocouple response time compensation circuit arrangement

Also Published As

Publication number Publication date
CH544218A (de) 1973-11-15
FR2171413B1 (it) 1978-03-03
DE2206276C3 (de) 1981-01-15
US3782347A (en) 1974-01-01
DE2206276A1 (de) 1973-08-16
DE2206276B2 (de) 1980-05-22
JPS554942B2 (it) 1980-02-01
FR2171413A1 (it) 1973-09-21
JPS4891425A (it) 1973-11-28
SE378282B (it) 1975-08-25
GB1395276A (en) 1975-05-21

Similar Documents

Publication Publication Date Title
IT990519B (it) Dispositivo per ridurre i componenti dannosi nell emissione dei gas di scarico in macchine a combustione interna
IT1022020B (it) Dispositivo per il disintossicamento del gas di scarico di macchine a combustione interna
IT996622B (it) Dispositivo per la depurazione dei gas di scarico di motori a combustione interna
IT988583B (it) Dispositivo per la depurazione dei gas di scarico in macchine a combustione interna con car buratore
IT981752B (it) Procedimento e dispositivo per disintossicare i gas di scarico di macchine a combustione interna
IT996363B (it) Dispositivo antiinquinamento per motori a combustione interna a ricircolazione di gas di scarico
IT1066355B (it) Dispositivo di scarico per motori a combustione interna
IT1041553B (it) Procedimento e dispositivo per ridurre le emissioni di scarico di un motore a combustione interna
IT1048402B (it) Dispositivo per svelenamento dei gas di scarico dei motori a combustione interna
IT1059505B (it) Procedimento per ridurre l emissione di elemneti dannosi nel gas di soarico di un motore a combustione interna
IT944035B (it) Dispositivo di comando per il funzionamento di una macchina a combustione interna lavorante con ritorno dei gas di scarico
IT941718B (it) Apparato per ridurre la quantita di componenti nocivi dei gas di scarico in motori a combustione interna per veicol
IT990517B (it) Dispositivo per disintossicare i gas di scarico di macchine a combustione interna
IT1012082B (it) Procedimento e dispositivo per la depurazione del gas di scarico di motori a combustione interna
IT1020634B (it) Motore a combustione interna con riciclo dei gas di scarico
AR214168A1 (es) Un dispositivo para mejorar la eficiencia de motores de combustion interna
IT998750B (it) Dispositivo per la depurazione dei gas di scarico di motori a combu stione interna
IT998170B (it) Motore a combustione interna e procedimento per il funzionamento dello stesso
IT981308B (it) Valvola per il ritorno dei gas di scarico in macchine a combu stione interna
IT1037222B (it) Dispositivo di accensione per motori a combustione interna
IT990344B (it) Dispositivo per alloggiare cataliz zatori per rendere atossici gas di scarico in motori a combustione interna
AR193035A1 (es) Un dispositivo para la recirculacion selectiva de los gases de escape aplicable a motores de combustion interna
IT974216B (it) Perfezionamento nei dispositivi di alimentazione dei motori a combustione interna funzionanti a gas
IT994269B (it) Perfezionamento nei dispositivi silenziatori per motori a combu stione interna
IT985626B (it) Dispositivo per ridurre la pro porzione di sostanze dannose nei gas di scarico di un motore a combustione interna