GB1395526A - Fuel injection systems - Google Patents

Fuel injection systems

Info

Publication number
GB1395526A
GB1395526A GB3134572A GB3134572A GB1395526A GB 1395526 A GB1395526 A GB 1395526A GB 3134572 A GB3134572 A GB 3134572A GB 3134572 A GB3134572 A GB 3134572A GB 1395526 A GB1395526 A GB 1395526A
Authority
GB
United Kingdom
Prior art keywords
fuel
valve
measuring element
return force
metering
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
GB3134572A
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 DE19691960146 external-priority patent/DE1960146C/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1395526A publication Critical patent/GB1395526A/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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/16—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors
    • F02M69/18—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors the means being metering valves throttling fuel passages to injectors or by-pass valves throttling overflow passages, the metering valves being actuated by a device responsive to the engine working parameters, e.g. engine load, speed, temperature or quantity of air
    • F02M69/22—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors the means being metering valves throttling fuel passages to injectors or by-pass valves throttling overflow passages, the metering valves being actuated by a device responsive to the engine working parameters, e.g. engine load, speed, temperature or quantity of air the device comprising a member movably mounted in the air intake conduit and displaced according to the quantity of air admitted to the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/16—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors
    • F02M69/26—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors the means varying fuel pressure in a fuel by-pass passage, the pressure acting on a throttle valve against the action of metered or throttled fuel pressure for variably throttling fuel flow to injection nozzles, e.g. to keep constant the pressure differential at the metering valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/30—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines
    • F02M69/36—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines having an enrichment mechanism modifying fuel flow to injectors, e.g. by acting on the fuel metering device or on the valves throttling fuel passages to injection nozzles or overflow passages
    • F02M69/38—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines having an enrichment mechanism modifying fuel flow to injectors, e.g. by acting on the fuel metering device or on the valves throttling fuel passages to injection nozzles or overflow passages using fuel pressure, e.g. by varying fuel pressure in the control chambers of the fuel metering device
    • F02M69/386—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines having an enrichment mechanism modifying fuel flow to injectors, e.g. by acting on the fuel metering device or on the valves throttling fuel passages to injection nozzles or overflow passages using fuel pressure, e.g. by varying fuel pressure in the control chambers of the fuel metering device variably controlling the pressure of the fuel by-passing the metering valves, e.g. by valves responsive to signals of temperature or oxygen sensors

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

1395526 Spray carburetters ROBERT BOSCH GmbH 5 July 1972 [5 July 1971] 31345/72 Addition to 1283860 Headings G3R R4 R72Y and R37D A fuel injection system for mixture compressing I.C. engines having continuous injection into the intake manifold and separate ignition as claimed in claim 1 of (1283860), said system comprising an arbitrarily operable butterfly valve and a measuring element arranged one behind the other in the intake manifold, the measuring element being arranged to be displaced through a distance proportional to the quantity of air flowing through the intake manifold, against a return force which is normally constant, said measuring element being arranged to actuate a movable part of a fuel metering valve which is arranged in a fuel line for the purpose of metering a quantity of fuel proportional to the quantity of air flowing, and an electromagnet the magnetic field strength of which is variable in dependence upon engine characteristics being arranged to act particularly in the direction of, and to vary the return force and being characterized in that the return force is provided by hydraulic pressure which is determined by a pressure regulating valve, the control current of the electromagnet and thus the initial stress of a spring of the pressure regulating valve being variable in dependence upon the oxygen content in the exhaust gas of the internal-combustion engine for the purpose of limiting the maximum valves of the concentration of carbon monoxide, nitric oxide and hydrocarbons. The hydraulic force opposing the movement of the measuring element 2 is provided by causing the fuel supplied by a pump 16 to act on the end-face 12 of a spool-type valve which meters the flow of fuel to the injectors. The pressure in the chamber 33 can be varied by the degree of opening of a valve consisting of a diaphragm 24 and a valve-member 36. The diaphragm is normally pressed against the member 36 by a spring 43, the force of which is modified by an electromagnet consisting of an armature 47 and a coil 51. The current flowing in the coil is determined by an ion-conducting solid electrolyte oxygen probe in the exhaust gas stream, the output from the probe being applied to the base of an emitter-follower transistorized amplifier. In order to be able to provide to the engine a mixture having a fuel-air ratio appropriate to varying conditions of operation, the metering element 2 and the fuel metering valve 7 are arranged to supply fuel and air in the ratio 1À05#, where "#" indicates a stoichiometric fuel/air ratio. The return force on the valve 12 is then modified by the action of the oxygen-probe system to supply a stoichiometric mixture. The transistorized amplifier also includes a circuit controlled by a switch which is closed shortly before the throttle valve 6 reaches the open position, so that the fuel/air ratio is adjusted to 0À9# for full load working.
GB3134572A 1969-12-01 1972-07-05 Fuel injection systems Expired GB1395526A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19691960146 DE1960146C (en) 1969-12-01 Fuel injection system with continuous injection into the intake manifold of mixture-compressing foreign-ignited internal combustion engines
DE19712133434 DE2133434C3 (en) 1969-12-01 1971-07-05 Fuel injection system with continuous injection into the intake manifold of mixture-compressing spark-ignited internal combustion engines

Publications (1)

Publication Number Publication Date
GB1395526A true GB1395526A (en) 1975-05-29

Family

ID=25758183

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3134572A Expired GB1395526A (en) 1969-12-01 1972-07-05 Fuel injection systems

Country Status (3)

Country Link
AT (1) AT318307B (en)
DE (1) DE2133434C3 (en)
GB (1) GB1395526A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2001129B (en) * 1977-07-12 1982-08-04 Ntn Toyo Bearing Co Ltd FUEL FEEDING APPARATUS FOR air fuel combustion mixture

Also Published As

Publication number Publication date
DE2133434B2 (en) 1977-09-01
AT318307B (en) 1974-10-10
DE2133434A1 (en) 1973-01-25
DE2133434C3 (en) 1978-05-18

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Legal Events

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