• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1495092 Automatic control of fuel injection in IC engines BENDIX CORP 22 Jan 1976 [3 Feb 1975] 02539/76 Heading G3N Fuel supplied by an electronic fuel injection arrangement is controlled during acceleration and deceleration of the engine by providing a correction circuit which divides a rate of charge of manifold pressure signal by an engine speed signal to give a transient term which is then added to a manifold pressure signal and applied to the electronic controller. As shown the signal from manifold pressure sensor 18 is applied to summing circuit 214 directly and to divider 110 through an operational differentiator and a speed signal from sensor 19 is applied directly to the divider 110 and to the control unit 20. The output of divider 110 is supplied to summing circuit 214 and the total signal applied to the control unit 20. Under steady conditions no transient term exists so the divider output is zero and the output of the summing circuit is the manifold pressure signal. In a modification the divider is replaced by a multiplier and the speed signal passed through an inverter before being applied to the multiplier. Additionally the output of the multiplier is differentiated before being supplied to the summing circuit, Fig. 4 (not shown). A practical example of a control arrangement employing a multi-vibrator circuit for applying the injection pulses and using a movable core transformer for sensing manifold pressure is described, Fig. 5 (not shown).
    公开号:SU843780A3
    申请号:SU762319203
    申请日:1976-02-02
    公开日:1981-06-30
    发明作者:Б.Таплин Лаэл
    申请人:Дзе Бендикс Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to engine building, and in particular, to fuel injection systems.
    Known fuel injection systems for 'internal combustion engine. 3 , containing electromagnetic nozzles installed on the inlet pipe and an electronic control device connected to the windings of the latter, having an electronic unit and connected to the input of the last date. a speed sensor, a pressure sensor installed on the inlet pipe and a correction circuit having inputs connected to the speed and 15 pressure sensors, an output connected to an additional input of the electronic unit, and a differentiating unit giving a signal according to the first derivative of the pressure sensor signal value for 20 times .
    However, in the known systems, the correction circuit provides a change in the fuel supply in transients 25 according to empirically calculated dependencies, and therefore, the specified degree of enrichment of the mixture is not provided and an over-expenditure of fuel supply to the engine occurs. thirty
    The purpose of the invention is to increase the efficiency of the engine and increase the torque in transient conditions. ·
    This goal is achieved by the fact that the correction circuit is equipped with an additional unit forming a first circuit with a differentiating unit and a second circuit made in the form of a summing unit, the inputs of which are connected to the pressure sensor and to the output of the primary circuit, and the output to the input of the electronic unit. In this case, the additional unit is made in the form of a divider with inputs connected to a speed sensor and a differentiating unit, and an output connected to a summing unit.
    In addition, the proposed system differs from the known ones in that the additional unit is made in the form of an inverter with an input connected to a speed sensor, and a multiplying unit with inputs connected to a pressure sensor and an output of the inverter, and an output connected to the input of the differentiating unit.
    The proposed system differs from the known ones also in that the first circuit is capable of outputting a control signal equal to V / kND ^ y · dP ^ / dt, and the second circuit equal to R.c + V / kND ^ y - dР m / dt, where V is the volume of the intake pipe, mA
    N - engine speed in rad / s;
    “Engine displacement, mA k - coefficient of specific heat;
    P is the pressure in the intake pipe, kg / m 2 ;
    d P fA I dt is the first time derivative of pressure.
    In addition, the proposed system differs from the known ones in that the first circuit of the correction circuit is equipped with a low-pass filter.
    In FIG. 1 is a block diagram of a proposed fuel injection system for an internal combustion engine; in FIG. 2 is a block diagram of a correction circuit of a system in FIG. 1; in FIG. 3 is a circuit diagram of an embodiment of a correction circuit.
    The fuel injection system for an internal combustion engine contains electromagnetic nozzles 2 installed on the intake pipe 1 and an electronic control device having an electronic unit 3 connected to the input 4 of the last 5 speed sensor, a pressure sensor 6 installed on the intake pipe 1, correction circuit 7 made with inputs 8 and 9, respectively connected to the sensors 5 revolutions and pressure b and the output connected to the additional input 10 of the electronic unit 3, and the distribution unit 11, the input 12 of which is li ne to the output of the electronic unit 3, and output - with associated windings of electromagnetic injectors 2. The latter fuel is supplied through conduit 13. In the intake conduit 1, a throttle valve 14 associated with the accelerator pedal 15 and serves to regulate the air entering the engine cylinders ·.
    As can be seen from figure 2, which shows a block diagram of the correction circuit 7; the latter has a differentiating block formed by a capacitor · 16, an amplifier 17, and a resistance of 18 and providing a signal with respect to the first derivative of the value of the signal ^ of the pressure sensor, an additional 'block formed by a divider 19 made with inputs 20 and 21 connected respectively to the outputs of the sensor 5 the revolutions of both the differentiating block and the summing block 22. The differentiating block and the additional block form in the correction circuit 7 a first circuit whose output is connected to the first input 23 of the summing block 22, forming second. the circuit of the correction circuit 7 and having a second input 24 connected to the output of the pressure sensor b, and an output connected to the additional input 10 of the electronic unit 3. In parallel with the resistance 18, a capacitor 25 is connected, which forms a low-pass filter and serves to reduce the influence of oscillations generated by the sensor and closing of clans of engine cylinders, especially at low engine speeds and at idle of the latter. The electronic unit 3 can be connected to other sensors (not shown) of the engine operating conditions, such as engine temperature, air temperature, oxygen content in the exhaust gases, and others.
    The system operates as follows.
    When the engine is running, air enters the intake pipe in an amount determined by the position of the throttle valve 14 and the engine speed. The electronic unit 3 in accordance with the signals received at its inputs, generates control pulses, which are amplified by the distribution unit 11 and sent to the windings of the electromagnetic nozzles 2. In this case, the control pulses are fed simultaneously to all nozzles 2 or to groups of nozzles 2. When the control is applied pulse to the winding of the electromagnetic nozzle 2, the latter opens and provides' fuel injection into the air entering the engine cylinders.
    Under steady-state conditions, the amount of fuel injected is proportional to the amount of air entering the engine, and this amount is derived from the pressure in the intake pipe 1, engine displacement, speed, gas constant and temperature. gurus of air.
    In transients of an engine, the amount of air entering the cylinders also depends on the compressibility of the air.
    Therefore, the electronic unit 3 is configured to generate a control pulse that takes into account both constant and transient modes and is written as follows mm where Ρθ is the control pulse from the electronic „block 3;
    R m - pressure in the inlet pipe 1 in kg / m 2 ;
    V, is the volume of the inlet pipe in m3;
    N - engine speed in rad / s;
    k is the coefficient of the ratio of specific heat;
    D MV - engine displacement in m 3 ;
    dP ^ / dt is the first time derivative of pressure.
    Under steady-state operating conditions, the signal generated by the first circuit from the Correction circuit is 0, since dP ^ / dt = O, and therefore, the summing unit 22. only supplies the signal generated by the pressure sensor, i.e., P ^, to input 10.
    When the pressure in the intake pipe 1 increases, the first circuit generates a signal proportional to 1 / N, that is, dP M / dt, which, when added to the signal from the pressure sensor in the summing unit 22, is converted to a total. signal exceeding the signal from the pressure sensor. The electronic unit 3, receiving this signal generates elongated control pulses that provide increased fuel consumption with respect to air flow, and therefore the specified engine operation is ensured.
    When the pressure in the intake pipe decreases, the first circuit also generates a signal proportional to 1 / N, which, when added to the signal from the pressure sensor, forms a total signal that reduces the duration of the control pulses from the electronic unit. 3.
    In the correction circuit 7 by means of a capacitor 16, an amplifier 17 and a resistance 18, a signal dP M / dt is generated. From the output of the amplifier 17 and from the output of the sensor 5 revolutions signals are sent to the inputs 20 and 21 of the divider 19, providing the generation of a control signal equal to
    In the best case, the signal from the output of the divider should be equal, as indicated above. However, it is possible to change the output signal in the direction of decreasing or increasing from various factors of the engine operating mode, namely, wetting of the cylinder walls, maximum power during acceleration, and others.
    Under steady-state operating conditions, that is, the signal at the output of the pressure sensor has a constant value, at the output of the amplifier 17 there is a zero signal and the divider 19 also generates a zero signal, and the summing unit 22 supplies only the signal from the sensor to the input of the electronic unit 3. Pressure - P ^ . .
    In this case, the amplifier 17 generates a signal with the value kdP M / dt f and the divider 19 then generates a signal
    Perhaps after amplifier 17, the installation of an additional amplifier (not shown), providing a signal to input 2.1
    Thus, the proposed fuel injection system provides for constant operation of the fuel supply in accordance with the air flow, and in transient conditions, an increased or decreased fuel supply depending on the acceleration or deceleration of the engine, in connection with which an increase in efficiency of the latter and an increase in torque by transient modes.
    In the block diagram of an embodiment of the correcting circuit 7 (Fig. 3), the additional unit is made in the form of an inverter 26, the input 27 of which is connected to the output of the sensor 5 revolutions, and a multiplier block 28, the inputs 29 and 30 of which are connected respectively to the outputs of the pressure sensor 6 and inverter 26. The output of the multiplying unit 28 is connected to the input of the differentiating unit formed by the amplifier 17, the resistance 18 and capacitors 16 and 25. The output of the differentiating unit is connected to the input 23 of the summing device.
    The corrective circuit 7 operates (Fig.Z) as follows.
    The inverter 26 converts the signal from the speed sensor 5 into a signal having a value of 1 / Ν, and the multiplying device 28, receiving signals from the pressure sensor 6 and the inverter 26 generates a signal having a value of Ρ Μ / Ν. This signal is fed to the input of the differentiating block of the first circuit of the correction circuit 7. Otherwise, the operation of the latter is similar to the operation of the system of FIG. 2.
    Thus, this embodiment of the fuel injection system for the internal combustion engine ensures the generation of control pulses supplied to the windings of the nozzles in accordance with the specified operating modes of the engine, in connection with which the efficiency of its operation is increased and the torque is increased in transient conditions.
    权利要求:
    Claims (5)
    [1]
    FIELD: engine engineering, and in particular, fuel injection systems. The fuel injection systems for the internal combustion engine, which contain electromagnetic injectors installed on the intake manifold and associated with the windings of the latter, an electronic control device having an electronic unit connected to the input of the last rpm sensor, installed on the inlet pipeline pressure sensor and a correction circuit having the inputs connected to the speed and pressure sensors, the output connected to the additional input of the electronic unit and the differentiating unit producing a signal according to p rvoy derivative from the time value of the pressure sensor signal. However, in the known systems, the correction circuit provides a change in the fuel supply at transient modes 1X according to empirically calculated dependencies, in connection with which a given degree of enrichment of the mixture is not achieved and the fuel supply to the engine is excessive. The purpose of the invention is to increase the efficiency of the engine and increase torque at transient conditions. The goal is achieved by the fact that the correction circuit is equipped with an additional unit that forms the first circuit with the differentiating unit and the second circuit made in the form of a summing unit, the inputs of which are connected to the pressure sensor and the output of the first circuit, and the output to the electronic unit input. In addition, the additional unit is designed as a divider with inputs connected to the speed sensor and the differentiating unit, and an output connected to the summing unit. In addition, the proposed system differs from those also known in that the additional block is made in the form of an inverter with an input connected to the speed sensor and a multiplying unit with inputs connected to the pressure sensor and the output of the inverter and an output connected to the input of the differentiating unit. The proposed system differs from the known ones in that the first circuit is made with the possibility of issuing a control signal equal to V / kND vy, and the second circuit equal to P. + V / kND v, where V is the intake manifold volume, N is the engine speed in /with; engine displacement, m / specific heat ratio ratio; pressure in intake manifold, kg / m, first derivative of pressure over time. In addition, the proposed system differs from the known ones in that the first circuit of the correction circuit is provided with a low-pass filter. FIG. 1 shows a block diagram of a proposed fuel injection system for an internal combustion engine; in fig. 2 - block scheme of the system of correction of the system. Fig. one; in fig. 3 is an electrical version of the execution of the correction circuit. The fuel injection system for internal combustion engines contains an electronic control device mounted on the intake pipe 1 of the electromagnetic nozzles 2, having an electronic unit 3 connected to the inlet 4 of the last turn sensor 5, installed on the intake pipe 1 of the correction pressure bar 6, made from inputs 8 and 9 are connected, respectively, to the sensors 5 turns and pressure and the output connected to the additional input 10 of the electronic unit 3, and the distribution block 1 input 12 of which is connected It is connected to the output of the electronic unit 3, and the output is connected with the windings of the electromagnetic nozzles 2. To the latter, fuel is supplied through the pipeline 13. In the inlet pipe 1, a choke valve 14 is installed that is connected to the accelerator 15 and serves to control the flow air into engine cylinders. As can be seen from Fig. 2, where the image of the correction circuit 7, the latter has a differentiating unit formed by a capacitor 16 by an amplifier 17 and a resistance 18 and providing a signal based on the first derivative of the value of the pressure sensor signal, the additional unit formed by the divider 19 is made . Inputs 20 and 21, connected respectively to the outputs of the speed sensor 5 and the differentiating unit, and the summing unit 22. The differentiating unit and the additional unit form the first circuit in the correction circuit 7, oh connected to the nepBoiviy input 23 of the summing unit 22, forming the second circuit of the correction circuit 7 and the second input 24 connected to the output of the pressure sensor b, and the output connected to the auxiliary input 10 of the electronic unit 3. Parallel to the resistance 18, a capacitor 25 is connected, forming a low-pass filter and used to reduce the effect of oscillations produced by the sensor and closing the engine cylinder valves, especially at low engine speeds and idling the latter. The electronic unit 3 may be connected to other sensors (not shown) of engine operating conditions, such as engine temperature, air temperature, exhaust gas oxygen content, and others. The system works as follows. When the engine is running, air flows through the intake manifold in an amount determined by the position of the throttle valve 14 and the engine revolutions. The electronic unit 3, in accordance with the signals arriving at its inputs, generates control pulses, which are amplified by the distribution unit 11 and are directed by it to the windings of the electromagnetic nozzles 2. At the same time, the control of the pulses is given to all the nozzles 2 or to the nozzle groups 2, When a control pulse is applied to the winding of the electromagnetic injector 2, the latter opens to provide fuel injection into the air entering the engine cylinders. Under established conditions, the amount of fuel injected is proportional to the amount of air entering the engine, and this amount is derived from the pressure in the intake manifold 1, the engine displacement, the speed, the gas constant and the air temperature. During engine transients, the amount of air entering the cylinders also depends on the compressibility of air. Therefore, the electronic unit 3 is made with the possibility of generating a control pulse, which takes into account both the constant and the transitional modes, and is written as follows: P p - (), c-KNI) control pulse from the electronic block 3; -pressure in intake pipe 1 in kg / m-; - the volume of the intake pipe in m3; - engine rpm to rad / s, ratio of specific heat capacity, engine displacement I dP / dt -. first derivative of pressure over time. Under the established operating conditions, the signal produced by the first circuit from the Correction circuit is equal to O, since, and, therefore, the summing unit 22 sends to input 10 only the signal generated by the pressure sensor, i.e. When the pressure in the intake manifold 1 increases, the first circuit produces a signal proportional to 1 / N, i.e., which when added to the signal from the pressure sensor in the summing unit 22, is converted into a total signal exceeding the signal from the pressure sensor. The electronic unit 3, receiving this signal, generates elongated control pulses that provide an increased flow of fuel in relation to the air flow, in connection with which a predetermined engine operation is ensured. When the pressure in the inlet pipe decreases, the first circuit also produces a signal proportional to 1 / N, which, when added to the signal from the pressure sensor, generates a total signal that reduces the duration of the control pulses from the electronic unit. In the correction circuit 7, using a capacitor 16, an amplifier 17 and resistance 18, a signal is generated. From the output of the amplifier 17 and from the output of the rotational speed sensor 5, signals ha are delivered to inputs 20 and 21 of the divider 19, which provides a control signal equal to --WPw.). In the best case, the signal from the splitter should be equal to: As indicated above. However, it is possible to change the output signal in the direction of decreasing or increasing from different factors the operating mode of the engine, such as wetting of the cylinder walls, maximum power during acceleration and others. Under established operating conditions, i.e., the signal at the output of the pressure sensor has a constant value, the output of amplifier 17 has a zero signal and divider 19 also produces a zero signal, and the summing unit 22 provides only a signal from the sensor to the input of the electronic unit 3, This amplifier 17 produces a signal with a magnitude, and divider 19 then produces a signal (). It is possible after the amplifier 17 to install an additional amplifier (not shown), which provides a signal (2.1) to the input 2.1. Thus, the proposed fuel injection system in constant operation modes provides fuel in accordance with the air flow, and in transient conditions, the fuel supply is increased or decreased depending on the acceleration or deceleration of the engine, thereby increasing its efficiency and increasing coolness. transition moment. In the block diagram of the embodiment of the correction circuit 7 (Fig. 3), the additional unit is designed as an inverter 26, input 27 of which is connected to the output of speed sensor 5, and a multiplying unit 28, inputs 29 and 30 of which are connected respectively to the outputs of pressure sensor 6 and inverter 26. The output of the multiplying unit 28 is connected to the input of the differentiating unit formed by the amplifier 17, resistance 18 and capacitors 16 and 25. The output of the differentiating unit is connected to the input 23 of the totalizer. Correction circuit 7 is working. (FIG. 3) as follows. Inverter 26 converts the signal from the speed sensor 5 to a signal having a magnitude of 1 / N, and multiplying device 28, receiving signals from pressure sensor 6 and inverter 26, generates a signal having a magnitude. This signal is fed to the input of the differentiating unit of the first circuit of the correction circuit 7. Otherwise, the operation of the latter is similar to the operation of the system of FIG. 2. Thus, such an embodiment of the fuel injection system for an internal combustion engine provides for the generation of control pulses supplied to the windings of the injectors, in accordance with the engine operating conditions, thereby increasing the efficiency of its operation and increasing the engine speed. moment on transient conditions. Claim 1. Fuel injection system for an internal combustion engine, containing electromagnetic injectors installed in the intake manifold and connected to the windings of the latter electronic control device having an electronic unit connected to the last input of the speed sensor installed on the intake manifold pressure sensor and circuit correction, having inputs connected by speed and pressure transmitters, an output connected to the auxiliary input of the electronic unit, and a differentiation unit issuing the signal of the first derivative of the signal of the pressure sensor over time, characterized in that, in order to increase efficiency and increase torque at transient conditions, the correction circuit is equipped with an additional unit, forming the first circuit with the differentiation unit, and As a summing unit, the inputs of which are connected to the pressure sensor and the output of the primary circuit, and the output to the input of the electronic unit.
    [2]
    2. Pop-up system 1, characterized in that the additional unit is designed as a divider with inputs connected to the speed sensor and the differentiating unit.
    T
    and an outlet connected to a summing unit.
    [3]
    3. The system according to claim 1, wherein the additional unit is designed as an inverter with an input connected to the speed sensor and a multiplying unit with inputs connected to the pressure sensor and output of the inverter and an output connected to the input of the differentiating unit.
    [4]
    4. The system of PP. 1-3, characterized in that the first circuit is made with the possibility of controlling the de signal of N / kND y-dP / dt, and the second circuit 5 equal to P + V / kNO -dP / dt,
    where V is the volume of the inlet pipe, M)
    N - engine speed in rad / s;
    the ratio of the specific heat; intake pressure
    N pipeline in
    first time derivative of pressure; engine capacity,
    W m,
    [5]
    5. The system of PP. 1-3, that is, that the first circuit of the correction circuit is provided with a low-pass filter.
    rig. f
    / X x "
    类似技术:
    公开号 | 公开日 | 专利标题
    SU843780A3|1981-06-30|Fuel injecting system for internal combustion engine
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    US4126107A|1978-11-21|Electronic fuel injection system
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    US4401086A|1983-08-30|Method of and apparatus for controlling an air ratio of the air-fuel mixture supplied to an internal combustion engine
    KR900008592B1|1990-11-26|Fuel injection control apparatus for internal combustion engine
    EP0197080B1|1990-03-07|Fuel control system
    US5566655A|1996-10-22|Method for controlling the flow of fluid through an intake pipe of an internal combustion engine
    同族专利:
    公开号 | 公开日
    IT1055050B|1981-12-21|
    CA1067178A|1979-11-27|
    DE2602989B2|1980-04-03|
    DE2602989C3|1981-01-29|
    US4010717A|1977-03-08|
    GB1495092A|1977-12-14|
    JPS5199733A|1976-09-02|
    FR2299516B1|1980-07-18|
    FR2299516A1|1976-08-27|
    DE2602989A1|1976-08-05|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/546,239|US4010717A|1975-02-03|1975-02-03|Fuel control system having an auxiliary circuit for correcting the signals generated by the pressure sensor during transient operating conditions|
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