US3828749A - Fuel injection apparatus - Google Patents
Fuel injection apparatus Download PDFInfo
- Publication number
- US3828749A US3828749A US00269175A US26917572A US3828749A US 3828749 A US3828749 A US 3828749A US 00269175 A US00269175 A US 00269175A US 26917572 A US26917572 A US 26917572A US 3828749 A US3828749 A US 3828749A
- Authority
- US
- United States
- Prior art keywords
- air
- return force
- air sensor
- fuel
- energizing current
- 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 - Lifetime
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Classifications
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- 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
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- 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
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- 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
- F02M69/30—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
Definitions
- This invention relatesto a fuel injection apparatus for continuously injecting fuel into the suction tube of an externally ignited internal combustion engine.
- an air sensor In the suction tube there is disposed an air sensor and, spaced therefrom, an arbitrarily operable butterfly valve.
- the air sensor is deflected by the throughgoing air in proportion to the .air quantities against a constant resetting force which, however, is variable as a function of engine parameters and which, at least partially, is sup plied by pressurized liquid.
- the air sensor actuates the movable valve member of a fuel metering and distributor valve disposed in the fuel path to meter fuel quantities which are in adesired ratio to the throughgoing air quantities.
- the change of the resetting force as a function of engine parameters is effected by virtue of an electromagnet, the magnetic force of which is variable as a function of said engine parameters.
- the composition of the exhaust gas has to be such that it makes possible a practically total conversion into harmless compounds.
- the air-to-fuel ratio has to be approximately stoichometrical and is thus designated as A l.
- the energizing current of an clectromagnet which, as a function of its electromagnetic force, varies the return force excrted on the air sensor, is variable as a function of the oxygen content in the exhaust gas for limiting the maximum value of the concentration of carbon monoxide, nitrogen oxides, and hydrocarbons.
- the electromagnet is associated with the biasing means of a valve which, as a function of this bias, controls the liquid pressure that generates the return force.
- the intake air enters into a suction tube portion 1 which comprises a conical portion 3 accommodating an air sensor 2. Th'ercfrom the intake air flows through a coupling hose 4 into a suction tube portion 5 which contains an arbitrarily operable butterfly valve 6. Subsequently, the intake air is admitted to one or more cylinders (not shown) of an internal combustion engine.
- the air sensor 2 comprises a plate member disposed normal to the direction of air flow and dcflectablc thereby in the conical portion 3 as an approximately linear function of the air quantities passing through the suction tube. Assuming a constant return force affecting the air sensor 2 and a constant air pressure prevailing upstream of the air sensor 2, the air pressure prevailing between the air sensor 2 and the butterfly valve 6 remains constant.
- the air sensor 2 directly controls a fuel metering and quantity distributor valve 7.
- a lever 8' which is integral with the sensor plate and which is pivotally held at 9.
- the lever 8 has an integral nose 10 which is in contact with a movable valve component 11 to displace the same.
- the latter forms part of the fuel metering valve 7 and is shaped as a control plunger.
- the radial face 12 of the control plunger 11 disposed from the nose 10 is affected by pressurized liquid which serves as the return force for the air sensor 2.
- the supply of fuel is effected by a fuel pump 16 which is driven by an clectromotor l5 and which draws fuel from a fuel tank 17 and forces it to the fuel metering valve 7 through a conduit 18. From the conduit 18 there extends, back into the fuel tank 17, a return conduit 19 which contains a pressure limiting valve 20.
- the pressurized fuel is admitted to a channel 21 provided in the housing of the fuel metering and distributor valve 7.
- the channel 21 communicates with an annular groove 22 provided in the control plunger 11 and also, with a plurality of chambers 23 (only one shown), each bounded by a portion of a diaphragm 24.
- a bounding or control edge I In of the annular groove 22 covers to a greater or lesser extent a plurality of control slots 25 (only one shown), each of which, through a channel 26, leads to a chamber 27 separated from an associated chamber 23 by the diaphragm 24.
- the diaphragm 24 serves as the movable part of a flat seat valve which, by means of a spring 29', is maintained in an open position. when the fuel injection apparatus is not in operation.
- the diaphragm boxes, each formed of a chamber 23, a chamber 27 and a portion of the diaphragm 24 separating these two chambers, ensure that independently from the flow passage section at the control slots 25, as determined by the position of the bounding edge 11a, that is, independently from the fuel quantities flowing to the fuel injection valves, the pressure drop at the fuel metering valve 22, is maintained substantially at a constant value. In this manner it is ensured that the extent ofdisplacement of the control plunger 11 and the metered fuel quantities are proportionate to one another.
- the sensor plate of the air sensor 2 is displaced in the conical portion 3 of the air intake tube, so that between the periphcry of the plate and the inner wall of the conical portion 3 there occurs a change of the annular flow passage section. This change is proportionate to the extent the air sensor 2 deflects. With this precondition there is ensured a linear dependency of the extent of displacement of the air sensor 2 and the sliding motion of the control plunger 11, so that to the air quantity flowing through the air intake tube there is continuously added a proportionate fuel quantity.
- the pressurized liquid which exerts a constant resetting force on the control plunger 11 is fuel.
- a conduit 32 which merges into a channel which, in turn, is in hydraulic communication with a pressure chamber 33 through a damping throttle 57.
- the chamber 33 accommodates that terminal portion of the control plunger 11 which includes the radial end face 12 disposed remote from the air sensor lever 8.
- the conduit 32 contains a throttle 34 which separates the supply circuit 18 of the fuel metering valve 7 from the control pressure circuit 32, 35.
- the fuel is admitted through the channel 35 to a pressure regulating valve assembly 36 and is returned therefrom through a return conduit 37 in a depressurized condition to the fuel tank 17.
- the pressure regulating valve 36 is designed as a flat seat valve in which the metallic diaphragm 24 serves as the movable valve member.
- the pressure regulating valve 36 When the pressure regulating valve 36 is in its open position, the diaphragm 24 clamped taut between a base 38 and a housing 39 determines, together with a stationary valve seat 40 forming an integral part of the base 38, the flow passage section of the pressure regulating valve.
- a very small deflection of the diaphragm 24 in a direction away from the valve seat 40 is sufflcient to fully open the valve and to cause the fuel to flow in a depressurized condition through the annular flow passage of the valve 36 from the channel 35 through the return conduit 37 into the fuel tank 17.
- the diaphragm 24 separates two chambers 41 and 42 from one another and is loaded by a spring 43, the bias of which may be arbitrarily altered by means of a set screw 44.
- the spring 43 urges the diaphragm 24 into contact with the valve seat 40 (closed position of valve 36).
- the spring 43 is disposed in a bore 45 of a magnet core 46 and exerts its force on the diaphragm 24 through an armature 47 (which serves as a spring seat disc) and a force-transmitting member 48.
- On the core 46 there is mounted a solenoid 51.
- the armature 47 is suspended in a frictionless manner on a spider 52 which is held between the clamping members 53 and 54.
- the energizing current is applied to the solenoid 51 through a plug 55.
- the magnetic circuit is closed by a ring 56 surrounding the solenoid 51.
- the aforedescribed fuel injection apparatus operates' as follows:
- the fuel pump 16 driven by the electromotor l5 draws fuel from the fuel tank 17 and forces it through the conduit 18 to the fuel metering valve 7.
- the internal combustion engine draws air through the air intake tube 1, 3, 4, 5 and as a result, the air sensor 2 executes a certain deflection from its position of rest.
- the control plunger 11 is shifted by virtue of the pressure exerted thereon by the lever 8. Consequently, the flow passage section of the control slots 25 will be enlarged.
- the direct connection between the air sensor 2 and the control plunger 11 results in a constant ratio of the intake air quantities to the metered fuel quantities.
- the return force exerted on the air sensor 2 has to be altered as a function of engine parameters. This is effected by either measuring these parameters electronically or, after their conversion into electric magnitudes, varying them by means of an electric control apparatus. Then, as corresponding current intensities, they vary the intensity of the magnetic fleld of the solenoid 51. As a result, the armature 47, exposed to the magnetic field, opposes the force of the biasing spring 43 to a greater or lesser extent.
- the magnetic force that is, the magnitude of the energizing current, may be converted directly into a pressure valve.
- the pressure regulating valve operates in a mechanically entirely frictionless manner.
- the magnetic hysteresis is maintained at a low value in a conventional manner by making the environmental components of nickel-containing iron.
- the pressure regulating valve 36 and the fuel metering and distributor valve 7 are advantageous to integrate to simultaneously use the diaphragm 24 as the movable valve member for both valves and to maintain the control pressure conduits 32, 35 as short as possible. It is to be understood that the pressure regulating valve 36 may be arranged, in a manner not shown, separate from the fuel metering and distributor valve 7.
- the fuel injection system may be designed for a predetermined air proportion A by shaping the conical portion 3 accordingly.
- the conical portion 3 is so designed that the air ratio A is approximately 1.1, while the regulation to A l is achieved with the aid of an oxygen sonde 60 to be described hereinafter.
- the fuel-air mixture is enriched by starting from a lean mixture.
- the oxygen sonde 60 is arranged in a wall 59 which separates a chamber 61 from a chamber 62. Through the chamber 61 there pass the exhaust gases, while the chamber 62 is in communication with the ambient atmosphere.
- the oxygen sonde 60 is bounded by gas contact members 64, 65 defining a space which is filled, within the wall 59, with an ion-conductive solid electrolyte 63.
- the member 64 is situated in the chamber 61 and is thus contacted by the exhaust gases, while the member 65 is located in the chamber 62 and is thus exposed to the ambient atmosphere.
- the oxygen ion conducting solid electrolyte 63 may be stabilized zirconium dioxide, thorium dioxide or mullite (the latter is a fire and high temperature-resistant material having the formula 3 Al- O -2 SiO
- the members 64 and 65 are porous, gaspervious foil-like components which are applied in a very thin layer and which may be formed of platinum or high temperature-resistant hard electric material such as tungsten carbide or high temperature-resistant, electrically conductive oxides of the type of Fe;,O.,. Be-
- the butterfly valve 6 in order to ensure that at full load the internal combustion engine delivers the highest torque, the butterfly valve 6, shortly before reaching its fully open position, operates a switch 70 having in series a resistance 71.
- a higher energizing current flowing through the solenoid 51 means a decrease of the return force exerted on the control plunger 11 and thus an increase of the metered fuel quantities.
- the air ratio thus adjusts itself to k OB.
- FIG. 3 there is shown the course of the sonde voltage U as a function of the air ratio A. If the fuel injection apparatus, by virtue of an appropriate design of the conical portion 3, has a base setting of lt l 1, then this corresponds to a sonde voltage A. In order to obtain lt l, a voltage comparison to the desired operational point B has to be effected for obtaining a signal for such an adjustment. For this purpose, as mentioned earlier, the potential of the oxygen sonde 60 is compared by means of the operational amplifier 68 with the reference potential which corresponds to point B and which is obtained at the voltage divider 66, 67. The amplified output signal thus controls the pressure regulating valve 36.
- an oxygen reference system In order to prevent the occurrence of inaccuracies caused by temperature fluctuations when the atmosphere is used as the oxygen reference system, it is expedient to use instead a hermetically closed oxygen reference system whose composition cannot change.
- an oxygen reference system there may be considered different mixtures of a metal and a metal oxide or mixtures of two oxides of a metal of two valencies, for example, Ni/NiO, Cu/Cu O, etc. systems, wherein the two components are in a stoichometrical ratio of 1:1.
- a fuel injection apparatus for the continuous injection of fuel into the suction tube of an internal combustion engine, said suction tube containing an arbitrarily operable butterfly valve, said apparatus being of the known type that has (a) an air sensor disposed in said suction tube spaced from said butterfly valve, said air sensor being deflected by the flow of intake air as a function of the intake air quantities, (b) means generating a return force affecting said air sensor and opposing the deflecting force of the air flow, said return force being independent from the deflected position of said air sensor, (c) a fuel metering and distributor valve having a movable valve member operatively connected to said air sensor to be displaced thereby to an extent proportionate to the deflection of said air sensor for maintaining constant the fuel-to-air ratio for any given return force, ((1) means for applying hydraulic pressure to said movable valve member, said hydraulic pressure forming at least one part of said return force, (e) an electromagnet associated with said means generating said return force and (f) means for varying said
- E. means connecting said arbitrarily operable butterfly valve to said switch for actuating the latter when said butterfly valve assumes its full load position to vary said base current and to alter said energizing current for setting a richer air-fuel mixture
- F. means connected in said circuit, said last-named means varying said energizing current flowing in said circuit as a function of the potential difference between said first and second members.
- a fuel injection apparatus for the continuous injection of fuel into the suction tube of an internal combustion engine, said suction tube containing an arbitrarily operable butterfly valve, said apparatus being of the known type that has (a) an air sensor disposed in said suction tube spaced from said butterfly valve, said air sensor being deflected by the flow of intake air as a function of the intake air quantities, (b) means generating a return force affecting said air sensor and opposing the deflecting force of the air flow, said return force being independent from the deflected position of said air sensor, (c) a fuel metering and distributor valve having a movable valve member operatively connected to said air sensor to be displaced thereby to an extent proportionate to the deflection of said air sensor for maintaining constant the fuel-to-air ratio for any given return force, (d) means for applying hydraulic pressure to said movable valve member, said hydraulic pressure forming at least one part of said return force, (e) an electromagnet associated with said means generating said return force and (f) means for varying
- said suction tube including a conical portion
- said air sensor including a plate member disposed and movable within the confines of said conical portion, the periphery of said plate member and the inner wall of said conical portion defining a flow passage section of an area dependent on the position of said plate member, said conical portion being shaped for an air ratio A 1.1, said oxygen sonde adjusting A to 1 when the engine operates at partial load.
- suction tube including a conical portion
- said air sensor including a plate member disposed and movable within the confines of said conical portion, the periphery of said plate member and the inner wall of said conical portion defining a flow passage section of an area dependent on the position of said plate member, said conical portion being shaped for an air ratio A 1.05
- said improvement including a two-point regulator to adjust A at the partial load range of the engine with the aid of said oxygen sonde.
- a fuel injection apparatus for the continuous injection of fuel into the suction tube of an internal combustion engine, said suction tube containing an arbitrarily operable butterfly valve, said apparatus being of the known type that has (a) an air sensor disposed in said suction tube spaced from said butterfly valve, said air sensor being deflected by the flow of intake air as a function of the intake air quantities, (b) means generating a return force affecting said air sensor and opposing the deflecting force of the air flow, said return force being independent from the deflected position of said air sensor, (0) a fuel metering and distributor valve having a movable valve member operatively connected to said air sensor to be displaced thereby to an extent proportionate to the deflection of said air sensor for maintaining constant the fuel-to-air ratio for any given return force, (d) means for applying hydraulic pressure to said movable valve member, said hydraulic pressure forming at least one part of said return force, (e) an electromagnet associated with said means generating said return force and (f) means for varying said
- said means generating said return force includes a pressure control valve having a closing spring generating a spring bias, the magnitude of which determines the pressure of said liquid, and spider means clamped within said pressure control valve, and wherein said electromagnet is connected to said pressure control valve to vary said spring bias as a function of the intensity of said energizing current, said electromagnet including an armature which opposes said closing spring with a force dependent upon the intensity of said energizing current, said armature being secured to said spider means for frictionless movement.
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)
- Fuel-Injection Apparatus (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712133434 DE2133434C3 (de) | 1969-12-01 | 1971-07-05 | Kraftstoffeinspritzanlage mit kontinuierlicher Einspritzung in das Saugrohr von gemischverdichtenden fremdgezündeten Brennkraftmaschinen |
Publications (1)
Publication Number | Publication Date |
---|---|
US3828749A true US3828749A (en) | 1974-08-13 |
Family
ID=5812750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00269175A Expired - Lifetime US3828749A (en) | 1971-07-05 | 1972-07-05 | Fuel injection apparatus |
Country Status (7)
Country | Link |
---|---|
US (1) | US3828749A (ja) |
JP (1) | JPS554215B2 (ja) |
BE (1) | BE785833R (ja) |
ES (1) | ES404564A2 (ja) |
FR (1) | FR2145275A6 (ja) |
IT (1) | IT1001499B (ja) |
SE (1) | SE366370B (ja) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3930481A (en) * | 1972-09-22 | 1976-01-06 | Robert Bosch G.M.B.H. | Fuel injection system for internal combustion engines |
US3931802A (en) * | 1972-09-22 | 1976-01-13 | Robert Bosch G.M.B.H. | Fuel injection system for internal combustion engines |
US3942493A (en) * | 1972-09-22 | 1976-03-09 | Robert Bosch Gmbh | Fuel metering system |
DE2553678A1 (de) * | 1974-11-29 | 1976-06-16 | Nissan Motor | Regeleinrichtung |
US3973529A (en) * | 1973-07-03 | 1976-08-10 | Robert Bosch G.M.B.H. | Reducing noxious components from the exhaust gases of internal combustion engines |
US4020813A (en) * | 1973-06-05 | 1977-05-03 | Nippon Soken, Inc. | Air-to-fuel ratio control means for carbureter |
US4040408A (en) * | 1974-08-06 | 1977-08-09 | Robert Bosch Gmbh | System for reducing toxic components in the exhaust gas of an internal combustion engine |
US4107920A (en) * | 1974-11-13 | 1978-08-22 | Nissan Motor Company, Limited | Method of and apparatus for controlling air/fuel ratio in internal combustion engine |
US4147513A (en) * | 1977-09-26 | 1979-04-03 | Bendix Autolite Corporation | Method and apparatus for measuring the O2 content of a gas |
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 |
US4526672A (en) * | 1984-03-23 | 1985-07-02 | Axia Incorporated | Oxygen sensor |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50137630A (ja) * | 1974-04-20 | 1975-10-31 | ||
JPS51120229A (en) * | 1975-04-14 | 1976-10-21 | Nippon Telegr & Teleph Corp <Ntt> | Optical system for reading luminous point coordinates |
JPS5447429A (en) * | 1977-09-21 | 1979-04-14 | Mitsubishi Electric Corp | Pen touch type input device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB600895A (en) * | 1945-12-14 | 1948-04-21 | John Kenneth Wadsworth Baines | Improved means for controlling the mixture of fuel and air supplied to internal combustion engines |
US3464801A (en) * | 1964-09-28 | 1969-09-02 | Tenex Corp The | Catalytic system for inert gas generation |
US3616274A (en) * | 1969-11-24 | 1971-10-26 | Gen Motors Corp | Method and apparatus for monitoring exhaust gas |
-
1972
- 1972-07-03 JP JP7266594A patent/JPS554215B2/ja not_active Expired
- 1972-07-04 IT IT26579/72A patent/IT1001499B/it active
- 1972-07-04 SE SE08786/72A patent/SE366370B/xx unknown
- 1972-07-04 BE BE785833A patent/BE785833R/xx active
- 1972-07-05 ES ES404564A patent/ES404564A2/es not_active Expired
- 1972-07-05 US US00269175A patent/US3828749A/en not_active Expired - Lifetime
- 1972-07-05 FR FR7224355A patent/FR2145275A6/fr not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB600895A (en) * | 1945-12-14 | 1948-04-21 | John Kenneth Wadsworth Baines | Improved means for controlling the mixture of fuel and air supplied to internal combustion engines |
US3464801A (en) * | 1964-09-28 | 1969-09-02 | Tenex Corp The | Catalytic system for inert gas generation |
US3616274A (en) * | 1969-11-24 | 1971-10-26 | Gen Motors Corp | Method and apparatus for monitoring exhaust gas |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3930481A (en) * | 1972-09-22 | 1976-01-06 | Robert Bosch G.M.B.H. | Fuel injection system for internal combustion engines |
US3931802A (en) * | 1972-09-22 | 1976-01-13 | Robert Bosch G.M.B.H. | Fuel injection system for internal combustion engines |
US3942493A (en) * | 1972-09-22 | 1976-03-09 | Robert Bosch Gmbh | Fuel metering system |
US4020813A (en) * | 1973-06-05 | 1977-05-03 | Nippon Soken, Inc. | Air-to-fuel ratio control means for carbureter |
US3973529A (en) * | 1973-07-03 | 1976-08-10 | Robert Bosch G.M.B.H. | Reducing noxious components from the exhaust gases of internal combustion engines |
US4040408A (en) * | 1974-08-06 | 1977-08-09 | Robert Bosch Gmbh | System for reducing toxic components in the exhaust gas of an internal combustion engine |
US4107920A (en) * | 1974-11-13 | 1978-08-22 | Nissan Motor Company, Limited | Method of and apparatus for controlling air/fuel ratio in internal combustion engine |
DE2553678A1 (de) * | 1974-11-29 | 1976-06-16 | Nissan Motor | Regeleinrichtung |
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 |
US4147513A (en) * | 1977-09-26 | 1979-04-03 | Bendix Autolite Corporation | Method and apparatus for measuring the O2 content of a gas |
US4526672A (en) * | 1984-03-23 | 1985-07-02 | Axia Incorporated | Oxygen sensor |
Also Published As
Publication number | Publication date |
---|---|
FR2145275A6 (ja) | 1973-02-16 |
SE366370B (ja) | 1974-04-22 |
ES404564A2 (es) | 1975-08-16 |
JPS554215B2 (ja) | 1980-01-29 |
IT1001499B (it) | 1976-04-20 |
BE785833R (fr) | 1972-11-03 |
JPS4816021A (ja) | 1973-03-01 |
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