GB1395276A - Internal combustion engines - Google Patents
Internal combustion enginesInfo
- Publication number
- GB1395276A GB1395276A GB406173A GB406173A GB1395276A GB 1395276 A GB1395276 A GB 1395276A GB 406173 A GB406173 A GB 406173A GB 406173 A GB406173 A GB 406173A GB 1395276 A GB1395276 A GB 1395276A
- Authority
- GB
- United Kingdom
- Prior art keywords
- changed
- amplifier
- time constant
- fuel
- speed
- Prior art date
- 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.)
- Expired
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)
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
1395276 Automatic control of exhaust gases ROBERT BOSCH GmbH 26 Jan 1973 [10 Feb 1972] 4061/73 Heading G3R [Also in Division F1] The fuel/air ratio supplied to an internal combustion engine is regulated by the output of an integrating servo amplifier 10 whose direction of integration is changed by a threshold switch 11 in response to a signal from an exhaust gas measuring device 13. (12 is a pre-amplifier), and if no change is signalled for a time related to engine speed the time constant of the integrator is shortened. The operation is shown in Fig: 1, in which the upper line represents the measured variations in exhaust gas composition and hence fuel/air ratio about the desired value represented by the horizontal line and corresponding to the stoichiometric ratio. The resulting output of the integrating amplifier is shown as the lower line, the inclination of which changes at each crossing of the desired value. During a period such as a, a' e.g. during acceleration, no correction would be made, but the time constant is changed at b thereby producing the result shown dotted at c in a shorter time. The time constant is changed by a second threshold switch 16 triggered by the voltage on a capacitor 15 which is charged during the space between constant width pulses whose frequency corresponds to speed, from speed detector 17. Alternatively the pulses may be counted and the time constant changed after a predetermined count. Details of the circuits shown in Fig. 2 are given, Fig. 4 (not shown). They employ operational amplifiers and switching transistors. The servo-amplifier may adjust the air nozzle of a carburetter or the fuel injected in a fuel injection system.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2206276A DE2206276C3 (en) | 1972-02-10 | 1972-02-10 | Method and device for reducing harmful components of exhaust gas emissions from internal combustion engines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1395276A true GB1395276A (en) | 1975-05-21 |
Family
ID=5835604
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB406173A Expired GB1395276A (en) | 1972-02-10 | 1973-01-26 | Internal combustion engines |
Country Status (8)
Country | Link |
---|---|
US (1) | US3782347A (en) |
JP (1) | JPS554942B2 (en) |
CH (1) | CH544218A (en) |
DE (1) | DE2206276C3 (en) |
FR (1) | FR2171413B1 (en) |
GB (1) | GB1395276A (en) |
IT (1) | IT990519B (en) |
SE (1) | SE378282B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104898719A (en) * | 2015-06-19 | 2015-09-09 | 王晓利 | Pollution VOC concentration and total discharge amount real-time monitoring system |
Families Citing this family (92)
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 (en) * | 1972-09-14 | 1981-08-20 | Robert Bosch Gmbh, 7000 Stuttgart | Method and device for exhaust gas decontamination from internal combustion engines |
US3815561A (en) * | 1972-09-14 | 1974-06-11 | Bendix Corp | Closed loop engine control system |
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 |
DE2247656C3 (en) * | 1972-09-28 | 1981-12-17 | Robert Bosch Gmbh, 7000 Stuttgart | Device for regulating the ratio of the fuel and air components of the operating mixture of an internal combustion engine |
DE2251167C3 (en) * | 1972-10-19 | 1986-07-31 | Robert Bosch Gmbh, 7000 Stuttgart | Device for exhaust gas detoxification from internal combustion engines |
DE2321721C2 (en) * | 1973-04-28 | 1982-12-16 | Robert Bosch Gmbh, 7000 Stuttgart | Device for reducing harmful components of exhaust gas emissions from internal combustion engines |
JPS4972524A (en) * | 1972-11-17 | 1974-07-12 | ||
US4015426A (en) * | 1972-11-20 | 1977-04-05 | Nippondenso Co., Ltd. | Fuel control system |
DE2301354C3 (en) * | 1973-01-12 | 1981-03-12 | Robert Bosch Gmbh, 7000 Stuttgart | Device for regulating the fuel-air ratio in internal combustion engines |
DE2301353A1 (en) * | 1973-01-12 | 1974-07-25 | Bosch Gmbh Robert | CONTROL DEVICE FOR EXHAUST GAS DETOXIFICATION FROM COMBUSTION MACHINERY |
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 |
USRE29741E (en) * | 1973-04-25 | 1978-08-22 | Nippondenso Co., Ltd. | Air-fuel ratio feed back type fuel injection control system |
US3916170A (en) * | 1973-04-25 | 1975-10-28 | Nippon Denso Co | Air-fuel ratio feed back type fuel injection control system |
JPS50229A (en) * | 1973-05-09 | 1975-01-06 | ||
JPS5213250B2 (en) * | 1973-05-31 | 1977-04-13 | ||
DE2327801C3 (en) * | 1973-06-01 | 1980-01-03 | Volkswagenwerk Ag, 3180 Wolfsburg | Arrangement for obtaining a speed signal for an electronic fuel injection device |
US4036186A (en) * | 1973-06-04 | 1977-07-19 | Nippon Soken, Inc. | Air-fuel mixture ratio correcting system for carburetor |
DE2333743C2 (en) * | 1973-07-03 | 1983-03-31 | Robert Bosch Gmbh, 7000 Stuttgart | Method and device for exhaust gas decontamination from internal combustion engines |
DE2337198C2 (en) * | 1973-07-21 | 1981-09-17 | Robert Bosch Gmbh, 7000 Stuttgart | Device for reducing the harmful components of the exhaust gas |
DE2422938C2 (en) * | 1974-05-11 | 1982-07-08 | Robert Bosch Gmbh, 7000 Stuttgart | Switching device for the controlled addition of additional air to the exhaust gas of an internal combustion engine |
JPS5114535A (en) * | 1974-07-24 | 1976-02-05 | Nissan Motor | Nainenkikanno nenryoseigyoyohisengataseigyosochi |
DE2448306C2 (en) * | 1974-10-10 | 1983-12-08 | Robert Bosch Gmbh, 7000 Stuttgart | Fuel injection system |
GB1524361A (en) * | 1974-10-21 | 1978-09-13 | Nissan Motor | Apparatus for controlling the air-fuel mixture ratio of internal combustion engine |
JPS51106828A (en) * | 1975-03-18 | 1976-09-22 | Nissan Motor | KUNENPISEIGYOSOCHI |
DE2547576A1 (en) * | 1974-10-25 | 1976-04-29 | Nissan Motor | DEVICE FOR THE CONTROL OF THE AIR-FUEL RATIO FOR A COMBUSTION ENGINE |
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 (en) * | 1975-04-18 | 1980-02-04 | Bosch Gmbh Robert | SET AND DEVICE FOR DETERMINING THE DURATION OF FUEL SUPPLY PULSE |
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 (en) * | 1975-05-28 | 1983-01-25 | トヨタ自動車株式会社 | Feedback air-fuel ratio control device for electronically controlled injection engines |
JPS5815648Y2 (en) * | 1975-06-03 | 1983-03-30 | 日産自動車株式会社 | Kuunenbiseigiyosouchi |
US4178884A (en) * | 1975-06-05 | 1979-12-18 | Nippondenso Co., Ltd. | Method and system to control the mixture air-to-fuel ratio |
JPS5824609B2 (en) * | 1975-06-17 | 1983-05-23 | 株式会社デンソー | Air-fuel ratio feedback type fuel injection control device |
US4111162A (en) * | 1975-06-10 | 1978-09-05 | Nippondenso Co., Ltd. | Method and system for controlling the mixture air-to-fuel ratio |
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 |
JPS5281435A (en) * | 1975-12-27 | 1977-07-07 | Nissan Motor Co Ltd | Air fuel ratio controller |
JPS5281438A (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 (en) * | 1976-02-04 | 1985-08-08 | Robert Bosch Gmbh, 7000 Stuttgart | Control device for influencing the operating mixture fed to an internal combustion engine |
JPS6010170B2 (en) * | 1976-02-12 | 1985-03-15 | 日産自動車株式会社 | Air fuel ratio control device |
DE2606625C2 (en) * | 1976-02-19 | 1984-02-02 | Robert Bosch Gmbh, 7000 Stuttgart | Device for reducing harmful proportions of exhaust gases from internal combustion engines |
JPS52114826A (en) * | 1976-03-22 | 1977-09-27 | Toyota Motor Corp | Feedback type electronic controller for a fuel injection type internal combustion engine |
JPS52145223U (en) * | 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 (en) * | 1976-06-11 | 1985-08-08 | Robert Bosch Gmbh, 7000 Stuttgart | Device for preventing control oscillations in a mixture preparation system that supplies an internal combustion engine with an operating mixture |
IT1084410B (en) * | 1976-08-25 | 1985-05-25 | Bosch Gmbh Robert | DEVICE FOR DETERMINING THE QUANTITY OF FUEL SUPPLIED BY INJECTION TO AN ENDOTHERMAL ENGINE, OR DEVICE REGULATOR OF THE MIXING RATIO FOR THE OPERATING MIXTURE TO BE ADDED TO AN ENDOTHERMAL ENGINE. |
DE2702863C2 (en) * | 1977-01-25 | 1986-06-05 | Robert Bosch Gmbh, 7000 Stuttgart | Method and device for regulating the mixture ratio components of the operating mixture fed to an internal combustion engine |
JPS5924247B2 (en) * | 1977-01-28 | 1984-06-08 | 株式会社日本自動車部品総合研究所 | Internal combustion engine exhaust gas purification device |
CA1079591A (en) * | 1977-02-11 | 1980-06-17 | Thomas R. Gantzert | Apparatus for controlling the air-fuel ratio in an internal 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 |
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 |
DE2709215A1 (en) * | 1977-03-03 | 1978-09-07 | Bosch Gmbh Robert | MONITORING CIRCUIT FOR EXHAUST GAS COMPOSITION IN COMBUSTION ENGINE |
DE2713988A1 (en) * | 1977-03-30 | 1978-10-05 | Bosch Gmbh Robert | PROCESS AND DEVICE FOR DETERMINING THE PROPORTIONAL PART OF THE FUEL-AIR MIXTURE ADDED TO A COMBUSTION ENGINE |
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 (en) * | 1981-06-24 | 1983-01-13 | Robert Bosch Gmbh, 7000 Stuttgart | ELECTRONICALLY CONTROLLED FUEL METERING SYSTEM |
DE3149096A1 (en) * | 1981-12-11 | 1983-06-16 | Robert Bosch Gmbh, 7000 Stuttgart | Exhaust gas composition control using lambda regulator - has integration time dependent upon time between consecutive regulator switching points |
JPS58172442A (en) * | 1982-04-01 | 1983-10-11 | Nippon Denso Co Ltd | Air fuel ratio control device |
JPS59103938A (en) * | 1982-12-03 | 1984-06-15 | Fuji Heavy Ind Ltd | Idle automatic governor |
JPS5994974U (en) * | 1982-12-18 | 1984-06-27 | 自動車機器株式会社 | Dust cover device for output shaft in steering gear |
FR2544802B1 (en) * | 1983-04-19 | 1988-07-22 | Mitsubishi Electric Corp | IGNITION ADJUSTMENT CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINES |
DE3327156A1 (en) * | 1983-07-28 | 1985-02-07 | Robert Bosch Gmbh, 7000 Stuttgart | METHOD AND DEVICE FOR (LAMBDA) CONTROL OF THE FUEL MIXTURE FOR AN INTERNAL COMBUSTION ENGINE |
JPS6038526A (en) * | 1983-08-11 | 1985-02-28 | Fuji Heavy Ind Ltd | Controller of air-fuel ratio |
FR2592685B1 (en) * | 1986-01-06 | 1989-12-29 | Renault | FUEL DOSING METHOD FOR ELECTRONIC INJECTION INTERNAL COMBUSTION ENGINE. |
JPS6285147A (en) * | 1986-06-16 | 1987-04-18 | Nissan Motor Co Ltd | Air-fuel ratio control device |
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 |
CN112255911A (en) * | 2020-10-19 | 2021-01-22 | 厦门五福印务有限公司 | PID control module and printing exhaust emission control system |
Family Cites Families (12)
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 (en) * | 1969-03-22 | 1978-05-16 | Philips Nv | DEVICE FOR THE AUTOMATIC REGULATION OF THE AIR-FUEL RATIO OF THE MIXTURE FEEDED TO AN COMBUSTION ENGINE. |
US3616274A (en) * | 1969-11-24 | 1971-10-26 | Gen Motors Corp | Method and apparatus for monitoring exhaust gas |
FR2142642B1 (en) * | 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 |
-
1972
- 1972-02-10 DE DE2206276A patent/DE2206276C3/en not_active Expired
- 1972-06-02 US US00259254A patent/US3782347A/en not_active Expired - Lifetime
- 1972-12-29 IT IT34074/72A patent/IT990519B/en active
-
1973
- 1973-01-12 CH CH41173A patent/CH544218A/en not_active IP Right Cessation
- 1973-01-26 GB GB406173A patent/GB1395276A/en not_active Expired
- 1973-02-09 FR FR7304771A patent/FR2171413B1/fr not_active Expired
- 1973-02-09 SE SE7301837A patent/SE378282B/xx unknown
- 1973-02-09 JP JP1638373A patent/JPS554942B2/ja not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104898719A (en) * | 2015-06-19 | 2015-09-09 | 王晓利 | Pollution VOC concentration and total discharge amount real-time monitoring system |
CN104898719B (en) * | 2015-06-19 | 2017-11-14 | 邓静秋 | Pollution sources VOC concentration and total emission volumn real-time monitoring system |
Also Published As
Publication number | Publication date |
---|---|
FR2171413A1 (en) | 1973-09-21 |
JPS554942B2 (en) | 1980-02-01 |
CH544218A (en) | 1973-11-15 |
DE2206276A1 (en) | 1973-08-16 |
IT990519B (en) | 1975-07-10 |
DE2206276C3 (en) | 1981-01-15 |
SE378282B (en) | 1975-08-25 |
FR2171413B1 (en) | 1978-03-03 |
DE2206276B2 (en) | 1980-05-22 |
US3782347A (en) | 1974-01-01 |
JPS4891425A (en) | 1973-11-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19930124 |