US3923016A - Electronic fuel injection apparatus for a fuel injection - Google Patents

Electronic fuel injection apparatus for a fuel injection Download PDF

Info

Publication number
US3923016A
US3923016A US468527A US46852774A US3923016A US 3923016 A US3923016 A US 3923016A US 468527 A US468527 A US 468527A US 46852774 A US46852774 A US 46852774A US 3923016 A US3923016 A US 3923016A
Authority
US
United States
Prior art keywords
signal
generating
representative
fuel injection
response
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
Application number
US468527A
Other languages
English (en)
Inventor
Yoshikazu Hoshi
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Application granted granted Critical
Publication of US3923016A publication Critical patent/US3923016A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • F02D41/182—Circuit arrangements for generating control signals by measuring intake air flow for the control of a fuel injection device
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/32—Controlling fuel injection of the low pressure type

Definitions

  • ABSTRACT [30] Foreign Application Priority Data In a closed-loop fuel injection apparatus for an internal combust1on eng1ne wh1ch compr1ses an an detec- May 9, 1973 Japan 48-50731 tor for measurmg a1r flow mto the engme, an oxygen 52 us. c1 123/32 EA; 123/119 R detector for measurmg quamty the 2 haust gas from the engtne, and a fuel control means [51] Int. Cl. F02D 5/02 [58] Field of Search 123/32 EA for determmmg the fuel amount 1n accordance w1th the outputs of the air detector and the oxygen detec- [56] References Cited tor.
  • the output of the oxygen detector is integrated by a capac1tor and the amount of 1n3ect1on fuel 1s deter- UNITED STATES PATENTS mined by the product of the charging quantity of the 3,745,768 7/1973 Zechnall ct al 123/32 EA apacitor and the output of the air detector. 3,782,347 I/l974 Schmidt ct al..
  • a fuel control apparatus of the present invention includes an integrating circuit for integrating current in response to the output from an oxygen detector.
  • the output of the integrating circuit compensates for the amount of injected fuel. If the integrating circuit has a large time constant, the operation of the apparatus is very stable, but the response is inferior; for a small time constant, the response is good, but the operation itself is unstable.
  • the integrating operation of the integrating circuit is controlled so as to operate during a predetermined duration independent of engine speed.
  • the time constant of the integrating circuit is small, yet the operation of the injection control apparatus is very stable.
  • FIG. 1 is a blockdiagram of an embodiment of the present invention
  • FIG. 2 is an explanatory drawing illustrating the operation state of FIG. 1;
  • FIG. 3 is a wave form of a charged voltage produced by the charging and discharging circuit of FIG. 1;
  • FIG. 4 is a modification of a pulse generator 5 and a flip-flop 29 of FIG. 1;
  • FIG. 5 is an explanatory drawing illustrating the operation state in accordance with the modification of FIG. 4.
  • FIG. 6 is a detailed circuit of the block diagram of FIG. 1.
  • an air flow detector 1 serves to detect the average value of air flow from the 2 air filter to an engine cylinder.
  • One of the most frequently used air flow detectors comprises a movable air plate inserted into an air passage and a variable resistor a slidable contact of which is moved by the displacement of the air plate. Therefore, the resistance of the variable resistor represents the average of the air flow and is changed in response to the change of air flow.
  • a temperature sensor 3 detects the temperature of the engine, and since the amount of fuel to be injected is affected by the temperature of the engine, the sensor 3 is needed to compensate the injected amount of fuel.
  • a pulse generator 5 generates timing pulses in response to the rotation of the crankshaft.
  • the timing pulse is applied to a flip-flop 29 for generating a duration pulse proportional to the engine operation.
  • An oxygen sensor 7 detects a characteristic of the exhaust gas, especially the density of oxygen in the exhaust gas.
  • an oxygen sensor consists of a zirconium dioxide and electrodes provided on its surface. When the oxygen density on one side of the zirconium dioxide is different from the density on the other side, a voltage is generated between the two sides in response to the difference of the oxygen density.
  • the one side is inserted into the exhaust gas and the oxygen density on the other side is kept constant, the change of the generated voltage corresponds to the variation of the oxygen density in the exhaust gas.
  • the temperature sensor 9 is provided to detect the temperature of the oxygen sensor 7. Since the output of the oxygen sensor 7 is also affected by temperature, it is needed to compensate the output voltage.
  • the comparing circuit 11 receives the outputs of the oxygen sensor 7 and the temperature sensor 9. When the oxygen density in the exhaust gas exceeds a predetermined value, a positive current is applied to an integrating circuit 19 through an AND gate 15. When the oxygen density is below a predetermined value, a negative current is applied to the integrating circuit 19 through an inverter 13 and an AND gate 17. When positive current is applied, the output voltage of the integrating circuit 19 is increased, and it is decreased by applying a negative current.
  • the operation of the gates 15 and 17 are controlled by a monostable multivibrator 21. Since the effect of the oxygen sensor is restricted by the monostable multivibrator 21, the integrating circuit 19 has large time constant.
  • a current controller 23 serves to control the charging current of a charging circuit 25 in such a way that the differential of the charging current is determined by total differential of the outputs of the air flow detector, the temperature sensor and the integrating circuit.
  • the output of the charging circuit 25 is discharged by a discharging circuit 27, in order to change the charged voltage to a function of time which represents the valve opening duration of the fuel injection valve. It is necessary to identify generating timing of the output of the discharging circuit 27 with fuel injection timing. Therefore, the operations of the charging and discharging circuits are controlled by the flip-flop 29.
  • a flip-flop 31 serves to distribute the output of the discharging circuit 27 to valve controllers 41 and 43 through AND gates 35 and 37. Fuel valves 45 and 47 are driven by the valve controllers 41 and 43, respectively.
  • the output of the air flow detector 1 corresponds to an average of the air flow in an air passage (not shown) as explained previously. Since the quantity of air introduced into one of the cylinders of the engine is determined by the opening time of an air-intake valve and the air flow quantity therethrough, it is possible to represent the quantity of air in the cylinder by the electrical output of the air flow detector 1 during the valve opening. Since the flip-flop 29 is operated by the output of the pulse generator 5, which is connected to the toggle input of the flip-flop, the duration of the pulse from the flip-flop 29 will be proportional to the valve opening.
  • the set output of flip-flop 29 is shown at (B) in FIG. 2, this output appearing on line 61 shown in FIG. 1.
  • the reset output will appear on line 62 at periods alternating between the set output of flipflop 29.
  • the charging circuit 25 since the set output of the flip-flop 29 is connected to the charging circuit 25, during the generation of the output on line 61, i.e., signal (B) of FIG. 2, the charging circuit will store a charge in accordance with the output of the air flow detector 21, which is connected to the charging circuit by way of current controller 23. This charged voltage represents the quantity of air introduced into a cylinder.
  • the quantity of fuel injection is controlled by the opening time of fuel valve 45 or 47, shown in FIG. 1, it is necessary to produce a signal as a function of time, which becomes the basis of the opening time of the fuel valve 45 or 47. Then, the charged voltage is discharged with a predetermined current value by the discharging circuit 27.
  • the charging circuit 25 produces a ramp output corresponding to the output of the air flow detector 1 during the time that the set output of flip-flop 29 is high. Then, by the way of the reset output of the flip-flop 29, on line 62, discharging circuit 27 is activated and the charge previously stored in charging circuit 25 is discharged during a period of time t, i.e., during the period of time of the negatively sloped ramp of signal (C) of FIG. 2.
  • the output of the discharging circuit 27 is coupled by way of AND gates and 36 to the respective valve controllers 41 and 43 for the fuel valves 45 and 47, respectively.
  • Connected to the other respective inputs of the AND gates are the set and reset outputs of the flip-flop 31, which is connected by way of lines 61 and 62 to the set and reset outputs of flip-flop 29.
  • the current to be charged is also effected by the output of the integrating circuit 19 which represents a characteristic of the exhaust gas.
  • the charging current is represented as a function of the air flow in the air passage and the amount of oxygen in the exhaust gas.
  • the discharging time will be affected by the output of the integrating circuit 19 and the quantity of injected fuel is compensated by the density of oxygen in the exhaust gas.
  • the tangent of the angle a is determined as a function of the outputs of the air flow detector 1, the temperature sensor 3 and the integrating circuit 19, all of which are supplied to the current controller 23.
  • the duration of the negatively-sloped ramp, i.e., time t is proportional to the opening time of the air-intake valve of the engine.
  • the tangent B is constant and is determined by the discharging current. While tan a is changed by the output of the integrating circuit, it is possible to change tan B in response to the characteristics of the exhaust gas, in order to compensate the quantity of injected fuel.
  • one fuel valve may be employed to simultaneously supply fuel to two cylinders.
  • the quantity of injected fuel must be doubled. This necessity is achieved by doubling the charging time of the charging circuit 25.
  • switches 51 and 52 are provided to operate in synchronism with the rotation of the crankshaft to produce pulses, the same as the output of the flip-flop 29.
  • the flip-flop 55 doubles the pulse duration of the switches 51 and 55 and the output 57 and 58 of the flip-flop 55 are supplied to lines 61 and 62 of FIG. 1. Since the duration of the pulses supplied to the charging circuit 25 is doubled, the operation time of the charging circuit is doubled as shown in FIG. 5.
  • the wave forms A) (D') correspond to the wave forms (A) (D) in FIG. 2, with the wave forms for each of the lines of flip-flop 55 shown at (B') and (8).
  • Circuit portion 1 19 is an integrating circuit, corresponding to block 19 of FIG. 1
  • portion 123 is a current controller, corresponding to block 23 of FIG. 1
  • portion 121 is a monostable multivibrator, corresponding to block 21 of FIG. 1
  • portion 129 is a pulse generator, corresponding to pulse generator 5 of FIG. 1
  • portion 127 is a charging and discharging circuit, corresponding to blocks 25 and 27 of FIG. 1.
  • a voltage supply potential is connected to terminal 151 and the output of the oxygen sensor (not shown) is applied to terminal 153 and amplified by field-effect transistor 155, the gate resistance of which is very large.
  • the output of the transistor 155 is applied to operational amplifiers 163 and 165. When the output of the transistor 155 exceeds a predetermined level established by the variable resistor 159, the output of the operational amplifier 165 will turn transistor 169 off.
  • a temperature sensor 161 is provided in series with the variable resistors 157 and 159, in order to stabilize the predetermined levels set by the variable resistors 157 and 159.
  • transistor 169 when transistor 169 is off," the potential at the terminal 151 will be resistively coupled to the base of transistor 177 which, in conjunction with transistor 179, will turn transistor 181 on, thereby discharging capacitor 175 therethrough.
  • transistor 173 which is resistively connected to the collector of transistor 171
  • the voltage across transistor 175 is amplified by transistor 183 and supplied to the base of the transistor 191.
  • a diode 187, variable resistor 189, transistor 191, resistor 193 and temperature detector'195, for detecting the temperature of the engine, are connected in series between the voltage source terminal 151 and ground.
  • the arm of the variable resistor 189 is displaced by the air-plate which receives the air flow.
  • the output line 197 will supply the voltage which changes as a function of the air flow, the voltage across capacitor 175 and the temperature of the engine, to the base of transistor 227, the operation of which will be discussed hereinafter.
  • switch terminal contacts 201 and 202 will alternately open and close.
  • transistor 205 When the switch 201 is open, transistor 205 will be on, and transistor 185 will be on.
  • transistor 185 When transistor 185 is turned on, the voltage at the collector thereof will become high, thereby forcing the voltage on line 197 to a high level, so that the operation of the charging circuit within circuit portion 127 is interrupted.
  • the monostable multivibrator 121, transistors 211 and 212 are operated in response to the voltage on the collector of transistor 207 within pulse generator circuit 129.
  • Transistors 215 and 216 provide the output of the transistors 167 and 169 to the integrating circuit when the trigger from the switch 201 is applied to the base of the transistor 212.
  • transistors 221 and 223 operate as a monostable multivibrator.
  • Transistor 227 and capacitor 225 operate as the charging circuit portion, while transistor 229 and capacitor 225 operate as discharging circuit.
  • the charging current of the capacitor 225 is determined by the voltage supplied to the base of the transistor 227 by way of line 197, as discussed above.
  • the discharging current is determined by the voltage applied to the base of the transistor 229, which is determined in accordance with the voltage across variable resistor 231, a slidable arm of which is supplied to the base of transistor 229.
  • a duration pulse corresponding to the charging time of the capacitor 225 is produced at the collector of the transistor 223 and supplied by way of output terminal 235 to a valve controller for controlling the operation of a'fuel injection valve.
  • the voltage of the capacitor 175 in the integrating circuit 119 which represents the oxygen density in the exhaust gas, compensates the charging current delivered to the capacitor 225 within a charging and discharging circuit portion 127.
  • the diode 187, the variable resistor 189, the resistor 193 and the temperature sensor 195 are connected in series between the voltage source terminal 151 and ground.
  • the drain electrode of the field-effect transistor 183 is then connected to the base of transistor 229.
  • the charging current is determined by the air flow average and temperature of the engine, and the 6 discharging current is determined by the voltage across capacitor 175.
  • An electronic control apparatus for a fuel injection system comprising:
  • third means for generating a second signal representative of the level of the quantity of oxygen in the engine exhaust gas
  • fourth means responsive to said second signal, for
  • fifth means coupled to said first means and said fourth means, for generating a charging current in response to said first and third signals
  • sixth means coupled to said second means and said fifth means, for discharging said charging current in response to said pulses generated by said second means;
  • eighth means responsive to the pulses generated by said second means, for generating a pulse having a predetermined duration, for controlling the operation of said fourth means.
  • said fourth means includes a comparing circuit which compares said second signal with'a predetermined value and generates one of a positive and negative valued signal in dependence upon said second signal exceeding said predetermined value, and
  • a charge-discharge circuit which integrates the output of said comparing circuit in response to said predetermined duration pulse generated by said eighth means.
  • An electronic control apparatus according to claim 2, wherein said eighth means comprises a monostable multivibrator.
  • said fifth means includes a voltage divider network having at least two variable resistance means and an output terminal connected in series across a constant voltage source, the resistance value of one of said variable resistance means being varied in accordance with the voltage integrated by the chargedischarge circuit of said fourth means, and the resistance value of the other of said variable resistance means being varied in accordance with the value of said first signal representative of air flow, the charging current generated by said fifth means varying in response to the voltage at said output terminal.
  • An electronic control apparatus for a fuel injection system comprising:
  • fourth means for storing or discharging a charge in response to the output of said third means
  • fifth means for storing a charge in response to the output of said first means
  • sixth means for discharging the charge stored by said fifth means through a resistance means, the value of which is dependent upon the output of said fourth means;
  • eighth means comprising a monostable multivibrator for operating said fourth means in response to the pulses generated by said second means.
  • An electronic control apparatus for a fuel injection system comprising:
  • third means for generating a second signal representative of the level of the quantity of oxygen in the engine exhaust gas
  • fourth means responsive to said second signal, and coupled to said second means, for generating a third signal representative of the integration of said second signal
  • fifth means coupled to said first means, said second means and said fourth means, for generating a fourth signal, a first component of which is representative of the storing of a charge over a first prescribed portion of said engine rotation, and a second component of which is representative of the discharging of said charge during a second prescribed portion of said engine rotation subsequent 8 to said first prescribed portion, in response to said first and third signals;
  • sixth means coupled to said fifth means and said second means, for generating a fuel injection valve opening signal in accordance with the duration of the second component of said fourth signal.
  • An electronic control apparatus for a fuel injection system wherein the amplitude of the first component of said fourth signal at the termination of said prescribed portion of said engine rotation is representative of the level of the density of oxygen in said exhaust gas, while the duration of said second component of said fourth signal is representative of the length of time required for the value of charge corresponding to said amplitude to discharge during said second prescribed portion of said engine rotation at a predetermined rate of discharge.
  • An electronic control apparatus for a fuel injection system according to claim 6, further including a monostable multivibrator, coupled to the output of said second means, for controlling the operation of said fourth means.

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)
US468527A 1973-05-09 1974-05-09 Electronic fuel injection apparatus for a fuel injection Expired - Lifetime US3923016A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48050731A JPS50229A (enrdf_load_stackoverflow) 1973-05-09 1973-05-09

Publications (1)

Publication Number Publication Date
US3923016A true US3923016A (en) 1975-12-02

Family

ID=12866984

Family Applications (1)

Application Number Title Priority Date Filing Date
US468527A Expired - Lifetime US3923016A (en) 1973-05-09 1974-05-09 Electronic fuel injection apparatus for a fuel injection

Country Status (2)

Country Link
US (1) US3923016A (enrdf_load_stackoverflow)
JP (1) JPS50229A (enrdf_load_stackoverflow)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057042A (en) * 1974-11-08 1977-11-08 Nissan Motor Co., Ltd. Air-fuel mixture control apparatus for internal combustion engines using digitally controlled valves
US4073274A (en) * 1974-11-12 1978-02-14 Nissan Motor Company, Limited Air-fuel metering system for internal combustion engine and apparatus to control air fuel ratio of air-fuel being applied to engine
US4088096A (en) * 1976-02-16 1978-05-09 Alfa Romeo S.P.A. Internal combustion engine comprising an exhaust system provided with probes for exhaust gas analysis
US4089311A (en) * 1975-07-08 1978-05-16 Robert Bosch Gmbh Fuel supply system for internal combustion engines
US4094273A (en) * 1975-07-14 1978-06-13 Nippon Soken, Inc. Air-fuel ratio adjusting system
US4106451A (en) * 1976-04-13 1978-08-15 Nippon Soken, Inc. Air-fuel ratio adjusting system for internal combustion engines
US4109615A (en) * 1974-10-21 1978-08-29 Nissan Motor Company, Limited Apparatus for controlling the ratio of air to fuel of air-fuel mixture of internal combustion engine
US4112893A (en) * 1975-12-25 1978-09-12 Nissan Motor Company, Limited Air/fuel ratio control system for internal combustion engine having high input impedance circuit
US4121546A (en) * 1975-10-28 1978-10-24 Nippon Soken, Inc. Air-fuel ratio adjusting apparatus for an internal combustion engine
US4121554A (en) * 1976-07-02 1978-10-24 Nippondenso Co., Ltd. Air-fuel ratio feedback control system
DE2846386A1 (de) * 1978-10-25 1980-05-14 Bosch Gmbh Robert Einrichtung zum steuern der gemischzusammensetzung bei einer brennkraftmaschine
US4221194A (en) * 1975-09-05 1980-09-09 Lucas Industries Limited Electronic fuel injection control employing gate to transfer demand signal from signal generator to signal store and using discharge of signal store to control injection time
US4231334A (en) * 1977-03-30 1980-11-04 Robert Bosch Gmbh Method and apparatus for determining the proportions of the constituents of the air-fuel mixture supplied to an internal combustion engine
US4294216A (en) * 1978-12-08 1981-10-13 Nissan Motor Company, Limited Air fuel ratio controlling device
US4372155A (en) * 1981-05-20 1983-02-08 Ford Motor Company Methods of monitoring a combustion system
US4452207A (en) * 1982-07-19 1984-06-05 The Bendix Corporation Fuel/air ratio control apparatus for a reciprocating aircraft engine
US20040178638A1 (en) * 2001-04-20 2004-09-16 Aloys Wobben Method for controlling a wind energy plant
US6809428B1 (en) * 2002-06-21 2004-10-26 Dana Corporation Overheat protection of an electrical component of an I.C. engine
CN102829837A (zh) * 2012-08-08 2012-12-19 潍柴动力股份有限公司 一种喷油量测量方法、装置和系统

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51138676U (enrdf_load_stackoverflow) * 1975-04-30 1976-11-09
JPS5827685Y2 (ja) * 1977-12-26 1983-06-16 株式会社吉野工業所 合成樹脂製小型容器
JPH06201539A (ja) * 1993-01-04 1994-07-19 Yasuo Kitsuta 遠心エバポレーター

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3745768A (en) * 1971-04-02 1973-07-17 Bosch Gmbh Robert Apparatus to control the proportion of air and fuel in the air fuel mixture of internal combustion engines
US3782347A (en) * 1972-02-10 1974-01-01 Bosch Gmbh Robert Method and apparatus to reduce noxious components in the exhaust gases of internal combustion engines
US3815561A (en) * 1972-09-14 1974-06-11 Bendix Corp Closed loop engine control system
US3824967A (en) * 1972-10-30 1974-07-23 Gen Motors Corp Electronic fuel injection system
US3831564A (en) * 1972-06-20 1974-08-27 Bosch Gmbh Robert Method to reduce noxious components in internal combustion engine exhaust gases, and apparatus therefor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3745768A (en) * 1971-04-02 1973-07-17 Bosch Gmbh Robert Apparatus to control the proportion of air and fuel in the air fuel mixture of internal combustion engines
US3782347A (en) * 1972-02-10 1974-01-01 Bosch Gmbh Robert Method and apparatus to reduce noxious components in the exhaust gases of internal combustion engines
US3831564A (en) * 1972-06-20 1974-08-27 Bosch Gmbh Robert Method to reduce noxious components in internal combustion engine exhaust gases, and apparatus therefor
US3815561A (en) * 1972-09-14 1974-06-11 Bendix Corp Closed loop engine control system
US3824967A (en) * 1972-10-30 1974-07-23 Gen Motors Corp Electronic fuel injection system

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109615A (en) * 1974-10-21 1978-08-29 Nissan Motor Company, Limited Apparatus for controlling the ratio of air to fuel of air-fuel mixture of internal combustion engine
US4057042A (en) * 1974-11-08 1977-11-08 Nissan Motor Co., Ltd. Air-fuel mixture control apparatus for internal combustion engines using digitally controlled valves
US4073274A (en) * 1974-11-12 1978-02-14 Nissan Motor Company, Limited Air-fuel metering system for internal combustion engine and apparatus to control air fuel ratio of air-fuel being applied to engine
US4089311A (en) * 1975-07-08 1978-05-16 Robert Bosch Gmbh Fuel supply system for internal combustion engines
US4094273A (en) * 1975-07-14 1978-06-13 Nippon Soken, Inc. Air-fuel ratio adjusting system
US4221194A (en) * 1975-09-05 1980-09-09 Lucas Industries Limited Electronic fuel injection control employing gate to transfer demand signal from signal generator to signal store and using discharge of signal store to control injection time
US4121546A (en) * 1975-10-28 1978-10-24 Nippon Soken, Inc. Air-fuel ratio adjusting apparatus for an internal combustion engine
US4112893A (en) * 1975-12-25 1978-09-12 Nissan Motor Company, Limited Air/fuel ratio control system for internal combustion engine having high input impedance circuit
US4088096A (en) * 1976-02-16 1978-05-09 Alfa Romeo S.P.A. Internal combustion engine comprising an exhaust system provided with probes for exhaust gas analysis
US4106451A (en) * 1976-04-13 1978-08-15 Nippon Soken, Inc. Air-fuel ratio adjusting system for internal combustion engines
US4121554A (en) * 1976-07-02 1978-10-24 Nippondenso Co., Ltd. Air-fuel ratio feedback control system
US4231334A (en) * 1977-03-30 1980-11-04 Robert Bosch Gmbh Method and apparatus for determining the proportions of the constituents of the air-fuel mixture supplied to an internal combustion engine
DE2846386A1 (de) * 1978-10-25 1980-05-14 Bosch Gmbh Robert Einrichtung zum steuern der gemischzusammensetzung bei einer brennkraftmaschine
US4294216A (en) * 1978-12-08 1981-10-13 Nissan Motor Company, Limited Air fuel ratio controlling device
US4372155A (en) * 1981-05-20 1983-02-08 Ford Motor Company Methods of monitoring a combustion system
US4452207A (en) * 1982-07-19 1984-06-05 The Bendix Corporation Fuel/air ratio control apparatus for a reciprocating aircraft engine
US20040178638A1 (en) * 2001-04-20 2004-09-16 Aloys Wobben Method for controlling a wind energy plant
US7098550B2 (en) * 2001-04-20 2006-08-29 Aloys Wobben Method for controlling a wind energy plant
US6809428B1 (en) * 2002-06-21 2004-10-26 Dana Corporation Overheat protection of an electrical component of an I.C. engine
CN102829837A (zh) * 2012-08-08 2012-12-19 潍柴动力股份有限公司 一种喷油量测量方法、装置和系统
CN102829837B (zh) * 2012-08-08 2014-09-10 潍柴动力股份有限公司 一种喷油量测量方法、装置和系统

Also Published As

Publication number Publication date
JPS50229A (enrdf_load_stackoverflow) 1975-01-06

Similar Documents

Publication Publication Date Title
US3923016A (en) Electronic fuel injection apparatus for a fuel injection
US3815561A (en) Closed loop engine control system
US3831564A (en) Method to reduce noxious components in internal combustion engine exhaust gases, and apparatus therefor
US3745768A (en) Apparatus to control the proportion of air and fuel in the air fuel mixture of internal combustion engines
US4161162A (en) Method and apparatus for controlling the operation of an internal combustion engine
US4089313A (en) Closed-loop air-fuel mixture control apparatus for internal combustion engines with means for minimizing voltage swing during transient engine operating conditions
US4141326A (en) Closed loop control system for hydrogen fuelled engine
US3782347A (en) Method and apparatus to reduce noxious components in the exhaust gases of internal combustion engines
US4178883A (en) Method and apparatus for fuel/air mixture adjustment
US4426987A (en) Method and apparatus for controlling the composition of the combustible mixture of an engine
US3660689A (en) Timing signal generating system for internal combustion engines
US3875912A (en) Automatic electronic regulator of spark advance in otto engines
US4144847A (en) Emission control apparatus for internal engines with means for generating step function voltage compensating signals
US3931808A (en) Altitude compensation system for a fuel management system
US4031866A (en) Closed loop electronic fuel injection control unit
US4073269A (en) Fuel injection system
US3788285A (en) Electronic fuel injection control device
US4015426A (en) Fuel control system
US4133326A (en) Fuel control system for an internal combustion engine
US4103649A (en) Method and system for controlling the mixture air-to-fuel ratio
GB1587603A (en) Method and device for monitoring the operational readiness of a probe
US4121545A (en) Electronic fuel injection control apparatus using variable resistance for relating intake air speed to engine speed
US4327689A (en) Combined warm-up enrichment, engine roughness and exhaust gas sensor control for EFI engine
US4345562A (en) Method and apparatus for regulating the fuel-air ratio in internal combustion engines
US4316105A (en) Comparator