GB1518428A - Closed-loop mixture control system for an internal combustion engine with response characteristic to idling condition - Google Patents
Closed-loop mixture control system for an internal combustion engine with response characteristic to idling conditionInfo
- Publication number
- GB1518428A GB1518428A GB1676676A GB1676676A GB1518428A GB 1518428 A GB1518428 A GB 1518428A GB 1676676 A GB1676676 A GB 1676676A GB 1676676 A GB1676676 A GB 1676676A GB 1518428 A GB1518428 A GB 1518428A
- Authority
- GB
- United Kingdom
- Prior art keywords
- engine
- amplifiers
- control signal
- idling
- closed
- 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)
- F02D41/1483—Proportional component
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)
Abstract
1518428 Automatic control of engine exhaust NISSAN MOTOR CO Ltd 26 April 1976 [24 April 1975] 16766/76 Heading G3R In a system in which the air/fuel ratio supplied to an I.C. engine is adjusted by a control signal in response to an exhaust gas sensor, the control signal is reduced when engine parameters indicate that the engine is idling. The object is to prevent hunting in these conditions. The system has an oxygen sensor 15 whose output is compared at 16 with a fixed reference to produce a high or low voltage according to whether the mixture is below or above stoichiometric, this voltage being supplied to P, 18 and I, 19 amplifiers whose outputs are combined at 23 and compared at 24 with a triangular waveform to produce square pulses to actuate a fuel injector or adjust a carburetter 10. When a transistor switch 27 connected to the throttle and a speed sensor 28 both indicate idling a NAND gate 21 opens gates Gl, G2 in the input resistor networks to the amplifiers, thereby increasing the input impedance and reducing the respective outputs, the combination of which constitutes the "control signal" of the claims. The gates may alternatively be on the output of the amplifiers.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4917475A JPS51124739A (en) | 1975-04-24 | 1975-04-24 | An air fuel ratio control apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1518428A true GB1518428A (en) | 1978-07-19 |
Family
ID=12823685
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1676676A Expired GB1518428A (en) | 1975-04-24 | 1976-04-26 | Closed-loop mixture control system for an internal combustion engine with response characteristic to idling condition |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS51124739A (en) |
CA (1) | CA1096469A (en) |
DE (1) | DE2617527A1 (en) |
GB (1) | GB1518428A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2168178A (en) * | 1984-10-22 | 1986-06-11 | Fuji Heavy Ind Ltd | Air-fuel ratio control system |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS529724A (en) * | 1975-07-14 | 1977-01-25 | Nippon Soken Inc | Air-fuel ratio adjusting device |
JPS5337826U (en) * | 1976-09-07 | 1978-04-03 | ||
US4191151A (en) * | 1978-03-20 | 1980-03-04 | General Motors Corporation | Oxygen sensor signal processing circuit for a closed loop air/fuel mixture controller |
US4365599A (en) * | 1979-05-09 | 1982-12-28 | Nissan Motor Company, Limited | Open and closed loop engine idling speed control method and system for an automotive internal combustion engine |
JPS5623549A (en) * | 1979-08-02 | 1981-03-05 | Fuji Heavy Ind Ltd | Air-fuel ratio controller |
JPS57108436A (en) * | 1980-12-25 | 1982-07-06 | Fuji Heavy Ind Ltd | Speed controller of engine |
JPS5951150A (en) * | 1982-09-16 | 1984-03-24 | Nissan Motor Co Ltd | Control of idle revolution speed of internal-combustion engine |
JPS6038526A (en) * | 1983-08-11 | 1985-02-28 | Fuji Heavy Ind Ltd | Controller of air-fuel ratio |
JPS6088839A (en) * | 1983-10-20 | 1985-05-18 | Honda Motor Co Ltd | Method of controlling operation characteristic quantity for operation control means of internal-combustion engine |
JPS60116053U (en) * | 1984-01-17 | 1985-08-06 | 日本電子機器株式会社 | Air-fuel ratio control device for internal combustion engines |
JPS59177757U (en) * | 1984-05-02 | 1984-11-28 | 愛三工業株式会社 | Internal combustion engine exhaust gas purification device |
JPH0730727B2 (en) * | 1986-10-08 | 1995-04-10 | マツダ株式会社 | Air-fuel ratio controller for engine |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2206276C3 (en) * | 1972-02-10 | 1981-01-15 | Robert Bosch Gmbh, 7000 Stuttgart | Method and device for reducing harmful components of exhaust gas emissions from internal combustion engines |
JPS5213273B2 (en) * | 1973-06-27 | 1977-04-13 |
-
1975
- 1975-04-24 JP JP4917475A patent/JPS51124739A/en active Pending
-
1976
- 1976-04-22 CA CA251,253A patent/CA1096469A/en not_active Expired
- 1976-04-22 DE DE19762617527 patent/DE2617527A1/en not_active Ceased
- 1976-04-26 GB GB1676676A patent/GB1518428A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2168178A (en) * | 1984-10-22 | 1986-06-11 | Fuji Heavy Ind Ltd | Air-fuel ratio control system |
Also Published As
Publication number | Publication date |
---|---|
JPS51124739A (en) | 1976-10-30 |
DE2617527A1 (en) | 1976-11-04 |
CA1096469A (en) | 1981-02-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
746 | Register noted 'licences of right' (sect. 46/1977) | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19960425 |