RU2657470C1 - Internal combustion engine starter connection circuit - Google Patents

Abstract

FIELD: electrical equipment.

SUBSTANCE: invention relates to the field of electrical equipment and can be used in the internal combustion engine starter connection circuits. In the internal combustion engine starter connection circuit, to the starter switch circuit blocking relay normally closed contacts are connected in series. Circuit includes storage battery, starter switch, DC motor and traction relay, having power contacts, holding and retracting windings. To the starter switch circuit blocking relay normally closed contacts are connected in series, which winding is connected to the generator output via a diode, to which the parallel stabilizer cathode, time setting circuit input and smoothing capacitor are connected, which other terminal and the time-setting circuit one terminal are connected to the ground, and the time-setting circuit output is connected to the parallel voltage stabilizer control input, which anode through the resistor is connected to the ground and the thyristor control input. To the thyristor anode the blocking relay winding second terminal is connected, and the thyristor cathode is connected to the ground.

EFFECT: increase in the internal combustion engine reliability and longevity.

1 cl, 1 dwg

Description

The invention relates to the field of electrical engineering, in particular to a start-up circuit for an internal combustion engine starter.

It is widely known that the starter circuit of an internal combustion engine with an electric starter is started. The starter is switched on by supplying voltage from the battery to the winding of the traction relay through the IGNITION SWITCH.

When the contacts of the IGNITION SWITCH are closed, the starter of the traction relay is connected to the battery, the anchor of the traction relay is drawn into the electromagnet and engages the gear with the flywheel crown, and at the end of the stroke closes the power contacts in the power supply circuit of the electric motor.

With this switching scheme, uncontrolled runtime of the starter and repeated switching on with the engine running, non-observance of the interval between starts is possible - which can cause a fast discharge of the battery, thermal overheating and destruction. This is an unacceptable case and a disadvantage, as reliability, durability and usability are reduced.

As analogues, the following starter switching schemes can be considered.

For example, the starter activation circuit in outboard motors (YAMAHA series with electric start, in particular YAMAHA-25B / 30HWS [6A9-288199-RC] in conjunction with the YAMAHA-703 remote control (remote control) [703-28199 -33], described in the instruction manual of Yamana Motor Go, Ltd, 2nd edition, February 2010). In this scheme, the starter was accidentally switched on only when the internal combustion engine was running, in the forward or backward switch of the travel switch, by introducing the NC contacts in the starter’s start-up (on) circuit - the “neutral sensor”, and in the switch position - the indicated shortcomings are not eliminated - as there is a warning in the official manual [6A9-28199-RC].

This disadvantage is eliminated, for example, in the ignition switch circuit of a VAZ-2108 2108-3704005 automobile, in which there is a blocking device against restarting the starter, where the key can be turned back from the "Ignition" position to the "Starter" position only after the key is first returned to the position "Turned off". Thanks to this device, the starter is prevented from starting when the engine is running. In subsequent models, it is made so that when the starter is switched on, the current to the traction relay passes through the contacts of the auxiliary interlock relay. The disadvantage is the lack of time limits for the starter and a break between starts.

In the starter control circuits on cars, electronic devices are used, for example, in VAZ cars, an electronic device 2612.3747 is used to automatically turn off and lock the starter. The device is made on five transistors and consists of an amplifier-limiter, a frequency-to-voltage converter, an amplifier, and a trigger. After an unsuccessful attempt to start, the starter turns on only after preliminary switching the starter switch to the “0” position - OFF. The circuit of the electronic device 2612.3747 of a VAZ car excludes the inclusion of a starter when the crankshaft rotates while the engine is running.

The main disadvantages of this device are the use of a power source, the large size and complexity of the circuit, which degrades reliability.

As a prototype of the proposed circuit, the well-known internal combustion engine starter starting circuit is used - patent RU 2244153 C2, IPC F02N 11/08, in which there is a rechargeable battery 1, a starter switch 2, a DC motor 3, a traction relay having a retractor 4 and a holding 5 windings and power contacts 6.

The disadvantage of the prototype is that in this scheme, the inclusion of a starter with a working internal combustion engine is not excluded, and also, there are no elements limiting the operating time of the starter and observing the minimum break time between them, which impairs reliability and durability.

The objective of the invention is to create a starter switching circuit, which allows to exclude the starter when the internal combustion engine is running, as well as to exclude the use of a power source, to ensure a minimum acceptable time between starts.

The technical result of using the proposed scheme will be to increase the reliability and durability of an internal combustion engine.

The problem is solved in that in the starter switching circuit of an internal combustion engine comprising a battery, a starter switch, a DC motor, and a traction relay having power contacts, holding and retracting windings, according to the invention, normally closed contacts of the blocking relay are connected in series with the starter switch , the winding of which is connected with one output to the output of the generator through a diode to which the cathode of the parallel stabilizer is connected, the input of the timing circuit , and a smoothing capacitor, the other terminal of which and one terminal of the timing circuit are connected to ground, and the output of timing circuit is connected to the control input of a parallel voltage stabilizer, the anode of which is connected to ground through the resistor, and the thyristor control input, and the second winding terminal is connected to the thyristor anode blocking relay, while the cathode of the thyristor is connected to ground.

The starter switching circuit is illustrated in the drawing. The starter circuit of an internal combustion engine contains a battery 1, a starter switch 2, the starter itself 10, comprising holding 4 and retracting 5 windings, power 6 and additional contacts 7, an electric motor 3, normally closed contacts 8, an interlock relay 9, an interlock relay 9 , thyristor 16, to the control electrode of which a resistor 19 is connected, connected to ground, and the output of a parallel voltage stabilizer 11 (for example, an adjustable Zener diode K1243EP1 AT or TL431) having a voltage stabilizer lower than the steady-state amplitude of the input pulses from the generator, during normal start-up of the internal combustion engine, it is connected to a timing circuit consisting of resistors 13, 14, and a capacitor 15, the charge time constant of which determines when the starter is allowed to run and when discharged, the break time between launches.

Description of the operation of the starter circuit of an internal combustion engine

In the initial state, at the moment of closing the contacts of the switch of the starter 2, the thyristor 16 is closed, the contacts 8 of the blocking relay 9 are closed, the current from the battery is supplied to the starter, and a typical process of starting the internal combustion engine occurs. If the internal combustion engine started normally, then from the output of the generator 18, the current through the rectifier diode 12 enters the smoothing capacitor 17, the adjustable stabilizer 11 and the timing circuit 13, 14, 15. When the voltage at the output of the timing circuit amplitude reaches more than the opening voltage of the adjustable stabilizer 11, a current begins to flow through it, which creates a voltage drop across the resistor 19, opening the thyristor 16, and at the same time, the blocking relay 9 is activated, opening normally closed contacts 8 in the circuit and starting the internal combustion engine, thereby blocking the restarting of the starter 10 of the internal combustion engine and ensuring a minimum time between restarting, which becomes possible only when the internal combustion engine is stopped and the timing circuits return to their initial state.

Claims (1)

A starter circuit for an internal combustion engine, comprising a battery, a starter switch, a DC motor and a traction relay having power contacts, holding and retracting windings, characterized in that normally closed contacts of the blocking relay are connected in series with the starter switch, the winding of which is connected with one terminal to the generator output through a diode to which the cathode of the parallel stabilizer is connected, the input of the timing circuit and a smoothing capacitor, another in the water of which and one output of the timing circuit are connected to the ground, and the output of the timing circuit is connected to the control input of a parallel voltage regulator, the anode of which is connected through the resistor to the ground and the control input of the thyristor, and the second terminal of the blocking relay winding is connected to the thyristor anode, while connected to the mass.

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