RU2289721C2 - Transistorized ignition system for internal combustion engines - Google Patents

Abstract

FIELD: ignition system at accumulation of energy in inductance coil.

SUBSTANCE: proposed system is provided with moving-coil transducer and emergency vibrator used as switch gear in case of failure of transistor switch of pulse sensor. Proposed transistorized ignition system includes ignition coil, additional resistor, transistor switch, pulse sensor and emergency vibrator. Ignition system is additionally provided with change-over relay, transistor switch, integrating circuit, coincidence gate, capacitor and resistor. Make contacts of change-over relay are connected between primary winding of ignition coil and input of emergency vibrator and break contacts are connected between output of transistor switch and primary winding of ignition coil. Change-over relay winding is connected in circuit of transistor switch whose input is connected via integrating circuit with output of coincidence gate whose one input is connected with input of transistor switch and other is connected via capacitor with output of transistor switch. Transistor switch circuit is provided with resistor and is connected with outputs connected with primary winding of ignition coil. Ignition system operates in two modes and primary circuit current is interrupted by transistor switch controlled by pulse sensor or by emergency vibrator. At interruption of primary circuit current by vibrator, ignition system operates in mode of continuous sparking on spark plugs.

EFFECT: ease of use of ignition system.

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Description

The invention relates to ignition systems with the accumulation of energy in inductance and can be used on internal combustion engines with non-contact magnetoelectric sensors of the ignition moment and emergency vibrators used as a “cold” reserve.

Known contactless ignition system for an internal combustion engine (Danov B.A. Electrical equipment BAT - M .: Voenizdat, 1988, p.204-211), containing an ignition coil, an additional resistor, a transistor switch, a pulse sensor and an emergency vibrator, which is connected to the primary circuit of the ignition system as a switching device in the event of a failure of the transistor switch or pulse sensor, that is, it is used as a "cold" reserve.

The disadvantage of this ignition system is the need to manually switch the ignition system to emergency operation, that is, manually connect the emergency vibrator to the ignition coil in case of failure of the transistor switch or pulse sensor, which complicates the operation of the ignition system.

The technical result is aimed at simplifying the operation of the ignition system.

The technical result is achieved by the fact that in the ignition system containing the ignition coil, an additional resistor, a transistor switch, a pulse sensor and an emergency vibrator, an additional switching relay, a transistor switch, an integrating circuit, a matching circuit, a capacitor and a resistor are introduced, moreover, normally closed contacts of the switching relay are connected between the primary winding of the ignition coil and the input of the emergency vibrator, and normally open between the output of the transistor switch and the primary winding to ignition carcasses, the coil of the switching relay is connected to the transistor switch circuit, the input of which is connected through the integrating circuit to the output of the matching circuit, one input of which is connected to the input and the other through the capacitor to the output of the transistor switch, and the resistor is inserted into the transistor switch circuit and connected to conclusions connected to the primary winding of the ignition coil.

A comparative analysis with the prototype shows that the proposed ignition system is characterized by the presence of additional elements: a switching relay, a transistor switch, an integrating circuit, a matching circuit, a resistor, and a circuit for connecting them.

The introduction of these elements allows in the event of a failure of the transistor switch or pulse sensor to automatically transfer the ignition system circuit to emergency operation, in which the primary current of the ignition coil is interrupted by an emergency vibrator, which simplifies the operation of the ignition system.

The drawing shows a diagram of the proposed ignition system.

The ignition system contains a transistor switch 1 controlled by a pulse sensor 2, an emergency vibrator 3. The load of the transistor switch 1 or emergency vibrator 3 is the primary circuit of the ignition system, consisting of the primary winding of the ignition coil 4 and an additional resistor 5 and connected to them depending on the mode the operation of the switching relay, which includes the winding 6 and contacts 7. The winding 6 of the switching relay is included in the circuit of the transistor switch 8, the input of which is connected to the output through the integrating circuit 9 m coincidence circuit 10, one input of which is connected to the input, and the other through the capacitor 11 with the output of the transistor switch 1. The ignition system is supplied from the battery 12 through the switch 13. The secondary winding of the ignition coil 4 is connected to the spark plug 14. The transistor switch 1, a resistor 15 is introduced, connected to the terminals connected to the primary winding of the ignition coil 4.

The ignition system operates in two modes, and the current of the primary circuit of the ignition system is interrupted by either a transistor switch 1 controlled by a pulse sensor 2 or an emergency vibrator 3.

When the transistor switch 1 and the pulse sensor 2 are working and the engine crankshaft is turned, positive voltage pulses from the pulse sensor 2 and through the capacitor 11 from the output of the transistor switch 1 are generated on the inputs of the matching circuit 15, resulting in a matching circuit 10 voltage pulses are generated, which are fed to the input of the integrating circuit 9. The voltage from the output of the integrating circuit 9 is supplied to the input of the transistor switch 8 and opens it. As a result, a current flows through the coil 6 of the switching relay and its normally open contacts 7 are closed. As a result, the primary winding of the ignition coil 4 is connected to the output of the transistor switch 1, which interrupts the current of the primary circuit of the ignition system with the arrival of positive voltage pulses from the pulse sensor 2. Thus in the secondary winding of the ignition coil 4 induces a high voltage supplied to the spark plug 14.

If the transistor switch 1 or the pulse sensor 2 is faulty, if the crankshaft of the engine is cranked, one of the inputs of the matching circuit 10 (or both) will not receive voltage pulses, therefore, there will be no voltage pulses at the output of the matching circuit 10 and, accordingly, there will be no the voltage at the inputs of the integrating circuit 9 and the transistor switch 8. No current will flow through the winding 6 of the switching relay, and the contacts 7 of the switching relay will remain in their original position, and its normally closed contacts connect the primary winding of the ignition coil 4 to the emergency vibrator 3, which in this case will interrupt the current of the primary circuit of the ignition system with a certain frequency, that is, the ignition system will operate in a continuous sparking mode on the spark plugs 14.

Thus, the proposed ignition system automatically switches to emergency operation in case of failure of the transistor switch or pulse sensor, which simplifies the operation of the ignition system.

In addition, the proposed system remains in emergency operation mode (from an emergency vibrator) in the event of radiation exposure, since in this case, in addition to the transistor switch, the switching circuit including electronic devices, such as coincidence circuit and transistor switch.

Claims (1)

A non-contact ignition system containing an ignition coil, an additional resistor, a transistor switch, a pulse sensor and an emergency vibrator, characterized in that an additional switching relay, a transistor switch, an integrating circuit, a matching circuit, a capacitor and a resistor are added to it, and the normally closed contacts of the switching relay are connected between the primary winding of the ignition coil and the input of the emergency vibrator, and normally open between the output of the transistor switch and the primary winding of the coil ignition coil, the switching relay coil is included in the transistor switch circuit, the input of which is connected through the integrating circuit to the output of the matching circuit, one input of which is connected to the input, and the other through the capacitor, to the output of the transistor switch, and the resistor is inserted into the transistor switch circuit and connected to conclusions connected to the primary winding of the ignition coil.