GB1475518A - Internal combustion engines - Google Patents

Internal combustion engines

Info

Publication number
GB1475518A
GB1475518A GB2871474A GB2871474A GB1475518A GB 1475518 A GB1475518 A GB 1475518A GB 2871474 A GB2871474 A GB 2871474A GB 2871474 A GB2871474 A GB 2871474A GB 1475518 A GB1475518 A GB 1475518A
Authority
GB
United Kingdom
Prior art keywords
air
engine
diaphragm
amount
fuel
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
Application number
GB2871474A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
Priority claimed from DE19732333082 external-priority patent/DE2333082C2/en
Priority claimed from DE19732349559 external-priority patent/DE2349559C2/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1475518A publication Critical patent/GB1475518A/en
Expired legal-status Critical Current

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
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
    • F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
    • F02D21/10—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air having secondary air added to the fuel-air mixture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/0015—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for using exhaust gas sensors
    • F02D35/0023—Controlling air supply
    • F02D35/0038—Controlling air supply by means of air pumps

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)

Abstract

1475518 Treating IC engine charges ROBERT BOSCH GmbH 28 June 1974 [29 June 1973 3 Oct 1973] 28714/74 Heading F1B An I.C. engine having a system for reducing the pollutants in the exhaust gases, the system comprising a device for measuring the quantity of air inducted, a device for metering an amount of fuel to provide a rich mixture, a source for feeding additional air to an induction manifold downstream of the air measuring device and an oxygen measuring sensor connected in an exhaust manifold of the engine and operable to control the amount of additional air supplied to the engine in dependence on the oxygen content of the exhaust gases to provide a desired fuel-air ratio. Air is drawn into an I.C. engine 1 through a filter 2 and fuel is added in a carburetter 4 to produce a richer-thanstoichiometric mixture, the amount of fuel being metered in accordance with the quantity of air which is determined by an air-measuring device not shown. Downstream of the air measuring device, additional air is admitted through pipe 9, to adjust the air/fuel ratio to stoichiometric, the amount of additional air being controlled in accordance with the amount of oxygen in the exhaust gases, which is determined by an oxygen sensor 7, in the exhaust manifold 3. Air is supplied by an engine driven pump 6, through a solenoid valve 10 which is actuated by the signal received from amplifier 8 to which sensor 7 is connected. The pressure of the additional air is controlled by a diaphragm valve 11 in which one side of the diaphragm is subject to inlet manifold depression via a pipe 15, and the other side to pump pressure. An outlet 14 to atmosphere is provided and the diaphragm is biased to close the outlet by spring 13. In a first modification, Fig. 2, the valve comprises three diaphragms 12, 22 and 20, and pipe 15 has a branch 19 which is connected to the chamber 18 on one side of the larger diaphragm 20. Atmospheric pressure is admitted to the chamber on the other side of diaphragm 20, and the space between diaphragms 12 and 22 is connected to the inlet manifold.
GB2871474A 1973-06-29 1974-06-28 Internal combustion engines Expired GB1475518A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19732333082 DE2333082C2 (en) 1973-06-29 1973-06-29 Device for detoxifying the exhaust gases of an internal combustion engine
DE19732349559 DE2349559C2 (en) 1973-10-03 1973-10-03 Device for detoxifying the exhaust gases of an internal combustion engine

Publications (1)

Publication Number Publication Date
GB1475518A true GB1475518A (en) 1977-06-01

Family

ID=25765403

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2871474A Expired GB1475518A (en) 1973-06-29 1974-06-28 Internal combustion engines

Country Status (5)

Country Link
JP (1) JPS5812464B2 (en)
BR (1) BR7405297D0 (en)
FR (1) FR2235280B1 (en)
GB (1) GB1475518A (en)
SE (1) SE7408503L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2620385A1 (en) * 1976-05-08 1977-11-17 Bosch Gmbh Robert REGULATING DEVICE FOR A SUPPLY OF FUEL INTO THE SUCTION MANIFOLD OF A COMBUSTION ENGINE

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2195262A5 (en) * 1972-08-02 1974-03-01 Laprade Bernard
DE2254961C2 (en) * 1972-11-10 1975-04-10 Deutsche Vergaser Gmbh & Co Kg, 4040 Neuss Control device for metering an additional amount of air to improve combustion in internal combustion engines or post-combustion of exhaust gases from internal combustion engines

Also Published As

Publication number Publication date
SE7408503L (en) 1974-12-30
JPS5812464B2 (en) 1983-03-08
FR2235280A1 (en) 1975-01-24
BR7405297D0 (en) 1975-09-30
FR2235280B1 (en) 1978-01-13
JPS5036822A (en) 1975-04-07

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee