• 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:
    The device serves for more reliable switching of solenoid valves used in carburettors for overrun cut-off with idling fuel shutoff or idling mixture shutoff on motor vehicles. The idling fuel feed or the idling mixture feed in an internal combustion engine is prevented when the internal combustion engine is operating in overrun conditions. The device comprises an initial stage (1), sensitive to the engine speed, which triggers a solenoid valve (MV) for overrun cut-off basically when a lower speed level is reached, thereby ensuring that the solenoid valve releases the fuel feed and a vacuum switch, (S1, S2) responding to the intake pipe pressure and thereby sensing in particular the closed position of the throttle valve arranged in the intake pipe, which vacuum switch likewise causes triggering of the solenoid valve irrespective of the speed. <IMAGE>
    公开号:SU952113A3
    申请号:SU772480854
    申请日:1977-05-06
    公开日:1982-08-15
    发明作者:Маиш Вольфганг；Константий Алэн
    申请人:Роберт Бош Гмбх (Фирма)；
    IPC主号:
    专利说明:

    39 at small angles of opening the throttle valve of the carburetor. In addition to the AHA, the charging circuit contains a charging circuit, a first capacitor connected to it, connected via a grading diode to a second capacitor, and the excitation stage has an exciting and output transistors, which form a switch of the threshold value, to the input of which the second capacitor is connected, and the discharge is connected to the first capacitor and has a monostable block and an ignition circuit. The pre-connected stage can be equipped with two charging impedances, the common point of which is connected through the resistance and the diode to the input of the pre-connected stage and through an additional diode to the negative pole. 8, the emitter circuit of the exciting transistor can be turned on resistance, with the common point of the latter and the emitter connected through an additional resistance to the positive pole. A monostable unit can be made in the form of a multivibrator formed by the first and second transistors equipped with a reverse (through the second capacitor and the resistance connected between the base and the collector of the first and second transistors, respectively, and the collector of the first transistor is connected to the second capacitor through serially connected impedance and diode. In addition, in the collector circuit of the exciting transistor, two impedances are common, the common point of which is connected to the base output The transistor, the collector of which is connected to the negative pole through the coil of the solenoid valve. The switch has normally open contacts connected to the collector of the driving transistor and the negative pole. The pre-connected stage can be supplied with a peak circuit between the positive and negative poles formed by series-connected resistance, a diode and the third capacitor, and the common point of the diode and the third capacitor is connected to the base of the exciting transistor pa, and about The common point of the resistance and the diode is connected through a resistance and a switch to the negative pole. The upstream cascade can also be equipped with a semiconductor element based on a fourth capacitor, and the collector is connected to the negative pole through a fifth capacitor, in parallel which a sixth capacitor connected to the base of the exciting transistor is connected in parallel, the fourth capacitor being charged from engine ignition system, and the fifth capacitor is equipped with a charging circuit having two adjustable resistances, and the constant charge time of the fifth capacitor and more constant discharge time of the fourth capacitor. In addition, the emitter transistor is connected to the voltage divider by its emitter and forms a threshold switch, and the excitation stage is provided with a voltage divider whose circuit includes the main contacts of the switch and the emitter transistor emitter-collector circuit, the common point of the voltage divider connected to the output transistor base. FIG. 1 shows the electrical circuit of the proposed control device — solenoid valves of the carburetor idle system; in fig. 2 shows an embodiment of an upstream cascade; in fig. 3 embodiment of the device according to FIG. one; in fig. 4 shows a second embodiment of an electromagnetic valve control device. The control unit of the carburetor solenoid valves (Fig. 1) contains a semiconductor CMT unit 1, the output 2 of which is connected to the coil of one electromagnetic valve + via a plug 3. At the same time, when the valve winding k is de-energized, the latter cuts off the flow of fuel or combustible mixture through the idling system, and when current or control signal is supplied from unit 1 to valve winding k, the latter is open and the fuel or mixture from the carburetor is fed into the engine. The input of unit 1 is connected to the excitation stage 5, which is connected to the upstream 59 stage 6, which is sensitive to the rotational speed of the engine. The drive stage comprises exciting and output transistors 7 and 8, forming a threshold value switch. The emitter of the exciting transistor 7 is connected to the negative pole 9 through the resistance 10, and the collector - to the positive pole 11 through series-connected resistances 12 and 13, the common point of which is connected to the base of the output transistor 8. The emitter point of the transistor 7 and additional resistance 1 with a positive pole 11. The pre-connected stage has a charging circuit formed in parallel with adjustable resistances 15 and 16, a capacitor 17 connected to it first, through the equalizing diode 18 with the second capacitor 19, and the discharge circuit formed by a monostable multivibrator from the first and second transistors 20 and 21. The first transistor 20 is directly connected to the negative pole 9 and the collector through a series of resistors 22 and 23 s the positive pole 11. Collector of the transistor 20 is also connected through a series-connected diode 2 and resistance 25 with a common point 2b of resistances 15 and 16 and the first capacitor 17. The base of the second transistor is 21 hours The capacitor 27 is connected to the common point of resistances 22 and 23. The pre-connected stage 6 contains a signal generating circuit formed by two charging resistances 28 and 29, the common point of which through the resistance 30 and diode 31 connects ko to input 32 of the pre-connected stage 6, and common the point of the diode 31 and the resistance 30 through the resistance 33 is connected to the negative pole 9. In the collector circuit of transistor 21, resistance 3 is set, and the common point of the latter and the collider is connected to resistance 29. The common base point of transistor 21 and the capacitor 27 is connected to the positive pole 11 through the resistance 35. The common point of the second capacitor 19 and the diode 18 is connected through the diode 36 and the resistance 37 to the positive pole and at the same time through the resistance 38 to the base of the exciting transistor 7. The common point 39 of the BTS and resistance 37 through the resistance tO and the wire is connected to the normally open contacts 2 of the switch 3 and then to the negative pole 9. The base of the exciting transistor 7 is connected via a capacitor to a collector, through a parallel-connected diode S and resistance - with collector of transistor 8 and through series-connected diodes 7 and 8 and resistance 49 - with negative pole 9. Block 1, Zener diode 50 and resistance 51 connected in parallel with the collector-emitter junction of the output transistor 8, diode 52, installed in front the input terminal 53 of the positive pole 11, a diode 5, connected in parallel to the winding of the solenoid valve. The switch 43 is provided with a vacuum drive (not shown), which is designed to operate at low angles of the opening of the throttle valve of the carburetor and at the same time ensures the closure of the contacts 42. The device operates as follows. In the absence of a control pulse at the input 32, the base of the first transistor 20 is connected via a resistance 28 to a negative pole 9 (the diode 31 is locked), and thus the transistor 20 is locked. As a result, the first capacitor 17 is charged through the resistances 15 and 16. When a control pulse is applied to the input 32, a positive pulse arrives at the base of the transistor 20 and it opens, resulting in a negative pulse through the capacitor 27 to the base of the second transistor J21 , providing through the resistance 29 holding the transistor 20 in a conducting state, which discharges the accumulated charge of the capacitor 17. In the conducting state, the transistor 20 remains until a recharge of the capacitor 27. Since the frequency of the control pulses depends on the frequency of rotation of the engine, at low revs the discharge of the capacitor 17 occurs less and less and at a minimum idle speed on the capacitor 17 a sufficiently high potential accumulates, so that through the diode
    79
    18, a capacitor 19 is charged for a positive voltage.
    When the car is moving while the throttle is open, the contacts 2 of the switch are open, the common point 39 is unlocked and a positive potential is applied to the base of the exciting transistor 7, which causes the output transistor 8 to open and the solenoid valve k is triggered, providing fuel through the idle system the progress of the carburetor. However, when the throttle valve is closed or ajar at a small angle, the contacts k2 are closed, therefore the negative potential is applied through the wire C and the resistance 40 to the common point 39 and the transistors 7 and 8 are locked, with the result that the winding is electrodg. The thread valve k is de-energized and the fuel supply is stopped at the forced idle mode. However, at extremely low idle speeds, the capacitor 19 provides for the opening of the transistor 7 and thus the opening of the valve and the supply of fuel at idle. In this case, the circuit, contacts k2 and resistance 13 do not act on. potential of capacitor 19, since diode 36 is locked. Diodes 47 and f8 are used to compensate for temperature characteristics and ex. so that, at a lower temperature, the electromagnetic valve k opens at higher revs due to condensation of fuel vapor in the engine intake tract and increased friction in the latter. The Zener diode 50 protects the output transistor from the peaks of the interference voltage. The diode 5 eliminates the voltage peaks when the solenoid valve is turned off and the diode 52 prevents the circuit from being destroyed if it is not properly connected to the power supply.
    A possible embodiment of the switch with normally closed contacts 55 through wire 5b is connected to the collector of the exciting transistor 7 "With this closed throttle valve, the excitation transistor is controlled only by signals from the upstream stage 6. With closed contacts 55 (when the throttle valve is open) the transistor 8 always
    eight
    is in a conducting state and the valve C provides the fuel supply through the idling system to the engine. But if the accelerator pedal is released, the fuel supply is stopped when the revolutions exceed the extremely low idle speed.
    FIG. 2 shows an embodiment of an upstream cascade. The backbone circuit of the first capacitor 17 has two series-connected resistances 57 and 58, the common point of which is through the resistance 59 and the diode 60 is connected to the input 32 and through the diode 61 to the negative pole 9. The common point of the diode 18 and the second capacitor 19 is connected to the base through resistance exciting transistor 7. With this execution, the device receives pulses from the engine ignition system.
    The operation of the device is as follows.
    In the absence of a pulse, the capacitor 17 is charged through the resistances 57 and 58, and in the presence of a closed circuit breaker in the ignition system, the discharge of the capacitor 17 occurs. Otherwise, the device operates similarly to the device in FIG. one.
    FIG. 3 shows an embodiment of a device that provides control (a solenoid valve A requiring a high current strength. The device contains an intermediate turnip, the winding 62 of which is connected to the emitter-collector circuit of the output transistor 8 and is connected to the solenoid valve k via the damping diode 63. The switching contact 6 is connected to the valve winding k through a capacitor 65 and a diode 66 and a wire 67 with a positive pole. The intermediate relay has a normally open contact 68 connected to a positive field. catfish through wire 67 and wire b9 connected to a common point of the capacitor b5 and diode 66.
    The operation of the device is as follows.
    权利要求:
    Claims (11)
    [1]
    When the transistor 8 is locked and the coil 62 of the intermediate relay is de-energized, the valve k is closed and the fuel supply to the motor is stopped. In this position, the capacitor 65 is charged 9. through the winding of the solenoid valve C to the supply voltage. When the intermediate relay is turned on, for a short time, twice the supply voltage is applied to the coil of the solenoid valve. This is ensured through a switching contact, a wire 69, a charged capacitor 65 and a wire 67. A high voltage power supply takes place during the discharge time of the capacitor b5. After the capacitor B5 is discharged, the valve coil k is supplied with a holding current as long as the intermediate relay is energized and the transistor 8 is in a conducting state. FIG. k depicts a second embodiment of the device. In this case, the upstream cascade has a semiconductor element made in the form of a transistor 70, in the base of which a fourth capacitor 71 is mounted. The collector 71 is connected to the negative pole 9 through diode 72 and the fifth capacitor 73 in parallel through which diode 7 is connected a sixth capacitor 75 connected to the base of the exciting transistor 76. The input 3 of the upstream cascade is connected to the ignition system and through the resistance 77 the diode 78 and the Zener diode 79 is connected to the common point of the capacitor 71 and the resistance 80 connected in the base circuit of the resistor 70 having a damping resistance 81. A resistance 82 is installed in the collector circuit of the transistor 70. A resistance 83 is established between the capacitor 75 and the base of the transistor 76. The fifth capacitor is equipped with a charging circuit having two adjustable resistances 8 and 85 The charge of the capacitor 73 is longer than the discharge time of the capacitor 71. The common point 86 of the sixth capacitor 75 and the diode is connected through a resistance 83 to the base of the exciting transistor 76, which has a damping resistance 87. connected to the common point of the voltage divider formed by the resistances 88 and 89, the first of which is directly connected to the negative pole 9, and the second through series-connected diodes 90, 91 and 92 to the positive pole 11. The collector of the transistor 76 1310 is connected through a capacitor 93 with a base and common point E of normally closed contacts 55 of switch +3 and a voltage divider formed by resistors 95 and 96, to the common point of which the base of output transistor 97 is connected. The collector of the latter is connected through a diode 98 to a winding Solenoid valve 4, in parallel with which diode 99 is connected. The base of transistor 76 through resistance 100 and wire 101 is connected to common point of diodes 98 and 99, as well as through diode 102 and resistance 103 with wire 101. General resistance point 89 and diode 90 through resistance 10 is connected to a common point of diode 102 And a resistance 103, and a common point of diodes 91 and 92 is connected via a Zener diode 105 to a common collector point of transistor 97 and diode 98. The emitter of transistor 97 is directly connected to the positive pole 11. Such a device operates in the following way. The control signal from the ignition system has a sinusoidal shape with a voltage of 200– 300 V and a duration of about 100 ms, charging the capacitor 71, which can be discharged through the resistances 80 and 81 and the emitter-base circuit of transistor 70, which is provided for a short pulse charge of relatively larger magnitude, discharge of greater duration. With the non-conducting transistor 70, the capacitor 73 is charged through the resistances of 8k and 85, and with the conducting transistor 70 it is discharged. This ensures reliable discharge of the capacitor 73 at each pulse. The Zener diode prevents the secondary charge of the capacitor 73 with a pulse arising in the ignition system due to the ignition of the ignition spark. After the discharge pulse dies out through the collector-emitter of transistor 70, the capacitor 73 is charged, and if its voltage exceeds the voltage of the capacitor 75, they continue to charge. At the same time, the voltage on the capacitor 75 remains constant due to the large value of the resistances 83 and 87. When the engine rotational speed is relatively low, valve i does not shut off the fuel supply to the P9 motor, and transistors 76 and 97 are open. Capacitor 93 suppresses interference pulses, and diode 102 and resistors 103 and 10 protect transistors. 76 and 97 from short circuit failure. The remaining elements of the device provide control of valve 4, regardless of the supply voltage and the ambient temperature. It is possible to carry out the device with an additional transistor 1 O, which supplies the voltage of the solenoid valve 4 with a higher voltage of the battery. Thus, such an arrangement of the device ensures that the solenoid valves act at the required frequency of rotation of the engine, and therefore the accuracy of the dosing of fuel through the idling system is improved. Claims 1. A carburetor idle control system for solenoid valves for an internal combustion engine comprising a semiconductor switching unit whose output is connected to the coil of at least one solenoid valve connected to the input of the excitation stage connected to the upstream stage engine speed sensitive switch, and a switch that differs from the fact that, in order to improve the accuracy of fuel metering through the cooling system hundred th stroke, the upstream stage provided with the charging circuit, the signal generating circuit, synchronous with the speed of rotation, and. the discharge circuit, the input of which is connected to the signal generation circuit, and the switch is connected to the excitation cascade and is equipped with a vacuum drive capable of operating at low angles of the opening of the throttle valve of the carburetor.
    [2]
    2. The device according to claim 1, wherein the charging circuit contains a charging circuit, a first capacitor connected to it, connected via a grading diode to the second capacitor, and the excitation stage 312 has an exciting transistor and an output transistor a threshold value, to the input of which a second capacitor is connected, the discharge circuit being connected to the first capacitor and having a monostable unit and an open circuit of the ignition.
    [3]
    3. The device according to claim 1, which is such that the upstream cascade is provided with two charging impedances, the common point of which is connected through the resistance and the diode to the input of the preincluded cascade and through an additional diode to the negative pole.
    [4]
    4. Device on PP. 1-3, characterized in that a resistance is included in the emitter circuit of the driving transistor, and the common point of the latter and the emitter is connected via an additional resistance to the positive pole.
    [5]
    5. Device on PP. 1-, characterized in that the monostable unit is designed as a multivibrator.
    [6]
    6. The device according to claim 5, differing in that the multivibrator is formed by the first and second transistors, provided with feedback through the second capacitor and CQ resistance connected between the base and the collector, respectively, of the first and second transistors, and the collector of the first transistor is connected to the second capacitor through series diode and resistance.
    [7]
    7. The device according to paragraphs. 1-6, in that in the collector circuit of the exciting transistor two impedances are sequentially installed, the common point of which is connected to the base of the output transistor, the collector of which is connected to the negative pole through the coil of the electromagnetic valve.
    [8]
    8. Device on PP. 1-7, characterized in that the switch has normally open contacts connected to the collector of the driving transistor and the negative pole.
    [9]
    9. The device according to claim 7, which is based on the fact that the upstream cascade is supplied with a peak circuit between the positive and negative 139 poles, which are sequentially connected directly by the resistance, the diode and the third capacitor ,. Moreover, the common point of the diode and the third capacitor is connected to the base of the exciting transistor, and the common point of the resistance and diode is connected via a resistance and switch to the negative pole.
    [10]
    10. Device on PP. 1-9, characterized in that the upstream cascade is equipped with a semiconductor element. The base of which is equipped with a fourth capacitor, and the collector is connected to the negative pole through a fifth capacitor, connected in parallel with a diode sixth capacitor connected to the base of the exciting transistor.
    [11]
    11. The device as claimed in claim 10, in which the fourth capacitor is adapted to be charged by the engine ignition system, and the fifth capacitor is equipped with a charging circuit having two adjustable resistances, and capacitor is longer than the time of discharge of the fourth capacitor. 12, the Device in PP. 10 and II, characterized in that the exciting transistor is connected to the voltage divider with its emitter and forms a threshold switch. 13. The device according to paragraphs. 10-12, characterized in that the excitation cascade is provided with a voltage divider, the circuit of which includes a switch and parallel to the emitter-collector circuit of the driving transistor, and the common point of the voltage divider is connected to the base of the output transistor. Priority points: 07.05.76 on PP. 1-9 I.03.77 on PP. 10-13 Sources of information taken into account during the examination 1. Accepted for Japan. № 7-1b2P, cl. 51Е65, published. 1972.
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    类似技术:
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    SU952113A3|1982-08-15|Device for controlling electromagnetic valves of carburettor no-load system
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    同族专利:
    公开号 | 公开日
    BR7702972A|1978-04-04|
    ES458532A1|1978-11-16|
    CH620275A5|1980-11-14|
    AU507446B2|1980-02-14|
    FR2350467B1|1984-07-06|
    IT1114785B|1986-01-27|
    AU2503277A|1978-11-16|
    FR2350467A1|1977-12-02|
    GB1576757A|1980-10-15|
    SE7705251L|1977-11-08|
    SE433103B|1984-05-07|
    JPS5352836A|1978-05-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CH505287A|1969-03-28|1971-03-31|Grosclaude Fernand|Device for adjusting the fuel supply of an internal combustion engine|
    GB1332311A|1969-10-22|1973-10-03|Nissan Motor|Fuel shutoff device for internal combustion engine|
    IT1023750B|1974-09-19|1978-05-30|Chicocini R|DEVICE FOR CONTROLLING THE DELIVERY OF LIQUID OR GASEOUS PROPELLENT FOR INTERNAL COMBUSTION ENGINES IN SPECIES INTENDED FOR SELF-TRACTION|US4284053A|1978-04-24|1981-08-18|Autotronic Controls Corp.|Electronic engine control|
    US4538573A|1981-01-30|1985-09-03|General Dynamics Corporation|Electronic engine control|
    FR2453981B3|1979-04-12|1982-01-15|Mandar Andre|
    DE3004199C2|1980-02-06|1984-12-06|Dieter 4924 Barntrup Fialla|Device for shutting off the fuel supply in overrun mode of an internal combustion engine|
    JPS6343572B2|1981-05-20|1988-08-31|Honda Motor Co Ltd|
    DE3233932C1|1982-09-13|1984-03-15|Karl Hopt GmbH, 7464 Schömberg|Device for reducing the fuel supply of a drive motor of a motor vehicle|
    WO1995009301A1|1993-09-28|1995-04-06|Schigulski Hans Juergen Edmund|Internal combustion engine fuel supply controller|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19762620181|DE2620181A1|1976-05-07|1976-05-07|DEVICE FOR SAFE SWITCHING OF ACTUATORS, IN PARTICULAR WHEN OPERATING A MOTOR VEHICLE|
    DE19772710989|DE2710989A1|1977-03-14|1977-03-14|DEVICE FOR THE SAFE SWITCHING OF ACTUATORS|
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