SU658310A1 - Device for controlling internal combustion engine fuel supply system element - Google Patents

Description

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The invention relates to the field of electrical equipment of automobiles and pulse engineering and can be used for threshold control of the components of the Power System of an internal combustion engine (ICE) as a function of the frequency of input pulses proportional to the rotational speed of the engine crankshaft or the speed of the automobile.

Known devices are sensitive to engine speed in which the duration period impudsov a speed sensor (chopper ignition system (ICE) favniVaetsy C sum of durations of krayyey least two monostable multivibrators 1. PogreshtfocTb such devices is determined by the sum of the monostable multivibrators errors manager that at low speeds Dyigatel (at large pegsgd) in a wide range of temperatures has a significant value due to the use in large vibrations of single vibrators.

It is also known device-sensation; There are two ignition pulses in the ignition system, containing a driver, two reference oscillators, a key-connected to the master circuit of the first generator, the output of which is connected directly to one of the trigger inputs and the second through an inverter to the second reference generator. One of the outputs of the trigger is connected to the actuator, and the second with the key. The input of the first generator is connected to the output of the formation circuit 2.

Input impulses synchronize the operation of the first generator on a single junction

transistor, the output pulses of which set the trigger in a certain state. With a decrease in the period of the input pulses, pulses appear at the output of the second power supply, and at the output of the first one disappear. The trigger is set to the opposite. condition, incl. salted element. In this case, by means of the key, the time constant of the first- is increased. generator. Therefore, the switching off of the actuator occurs at a larger value of the period of input impulses than inclusions.

Claims (2)

Thus, the moment of the device's activation is determined by means of generation of the pulse of the pulse x HMity.nbcoR with: the pulse duration formed on the emitter of the junction transition transistor of the generator. The accuracy of the moment of switching on and off of the T1OL1 Itelnoy element is very high, due to the need, for large non-riols, the use of large capacitor capacitors. KpoiMe addition, the achievement of high accuracy is difficult due to the variation in temperature parameters of single junction transistors. The purpose of the invention is to improve the accuracy of the device. The goal is achieved by the fact that in the control unit of the power supply system of an internal combustion engine contains a driver of impulses l Vy os novibrator, a key connected to the master circuit of the first one-vibrator connected to the output of the driver of impulses, and a trigger with an actuator on one of its outputs, while another output. trigger connected to the key, additionally introduced a phase discriminator connected between the outputs of the one-shot and the trigger inputs, the input of the second one-shot soy dinene with the output of the pulse driver and the input of the first one-one vibrator, and the fact that the phase discriminator contains two transistors to four resistors, the collectors of the transistors are connected to the outputs of the phase discriminator, each input through which one transistor is connected to the base of one transistor and through another peanctop to the collector another transistor. FIG. .1 a schematic diagram of the control unit of the power supply system of the internal combustion engine is illustrated; In FIG. 2 shows the timing diagram of the device. The control unit of the ENERANCE SYSTEM element: J power of the internal combustion engine deploys pulse shaper 1, two single vibrators 2 and 3, a key 4 connected to the time of the master circuit of the single vibrator 2 connected to the output of the pulse shaper I and trigger 4, connected to one output with an actuator 6, and output “CL, Ocho1“ 4, phase discriminator 7, connected by outputs of single vibrators Z and 3 and inputs of the trigger 5. Input single vibrator a 3 is connected to the output, pulse mapper 1 and input single vibrator, and 2. Phase discriminator 7 contains transistors 8 and 9 and re Zistors 10, 11, 12 and 13. The collectors of transistors 8 and 9 are connected to the outputs of phase discriminator 7. The first input of phase discriminator 7 under. is connected via resistor 10 to base transistor 8, and through resistor U- to collector. of the transistor 9. Another input of the phase dis KfJMMHHafopa 7 is connected via a relay 12 to the base of transistor 9, e through a resistor 13 - “collector of transistor 8” The impulses from the riajKtf-an system through the driver I (Fig. 2xi) are connected to the new vibrators 2 3, launch them all at once. Olnovibrator 2, organizes pulses for them. The sensitivity of which is proportional to the period of triggering km of pulses {FIG. 26). The one-vibration 3 forms an imp; пcm. standing length only SPG (f.Ig. 2 and). Single-output output pulses (ditch 2 and 3 are compared in duration to phase discriminator m. 7. If the duration of a pulse generated by a single vibrator 2 is greater than the duration of a single pulse output of one vibrator 3, then the difference in pulse durations is allocated at the collector of transistor 9 (Fig. 2g) and fed one input of the trigger 5, holding the trigger 5 n actuator b (electromagnetic valve 1 in the initial state. When increasing the engine speed, i.e., reducing the period of starting impulses. pulse duration s formed by the Novibrator 2, is compared with the duration of the pulses generated by the single vibrator 3, and then becomes somewhat less than the latter. The voltage pulse on the collector of transistor 9 disappears, and a pulse appears on the collector collector, 8 equal to the difference between the durations of the output pulses of one-shot 3 and 2 (Fig. 2d). Trigger 5 is transferred to another stable state, turns on the actuating element 6 and simultaneously with the help of key 4 changes the time specifying uertb of one-shot 2 to decrease And two revolutions device returns to the initial state at other rotational speeds, providing the necessary hysteresis. Thus, the moment of activation of the actuator is determined by the equality of the output pulse duration of the one-shot 2, proportionally to the period of the starting pulses, and the reference (constant) time interval of the one-shot 3. That is, the reference time interval of the one-shot 3 does not compare with the whole period of the input pulses with. Essentially a smaller part of it, f. Orms, operated with high accuracy by one-oscillator 2. This allows one-time capacitor 3 to use a one-capacitor one-time capacitor to form the reference time determining the accuracy of the device. Claims I. Adhemento control unit Engine power supply system for combustion engine containing a forma | PV gel and pulses, two odibibrrr, crank, connected with a irepsoro circuit with a single inlet motor, half blunt to the output of the pulse body, and a trigger with an actuator on one of its outputs, while the trigger output is connected to the key, which is different topics that, with increased accuracy of operation, a phase discriminator was introduced into it, which was tapped between the outputs of one-shot and trigger inputs, the input of the second one-shot was connected to the output of the driver and the input of the first one-shot. 2. The device according to p. I, characterized in that the phase discriminator contains two transistors and four resistors, the collectors of the transistors are connected to the outputs of the phase discriminator, each input through one resistor connected to the base of one transistor, and through the other resistor to the collector another transistor. Sources of information taken into account in the examination 1.Patent of France No. 2031240, cl. F02 P 9/00, 12.05.69. 2. Express information. Sharing best practices in the automotive industry. Tol tti, NIIavtoproma branch, 1975, No. 5, p. 34.35. at.