FR2537216A1 - IGNITION SYSTEM WITH HIGH VOLTAGE MAGNETS AND CAPACITORS FOR INTERNAL COMBUSTION ENGINES - Google Patents

Abstract

A. HIGH VOLTAGE MAGNETS AND CAPACITORS IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINES. B. INSTALLATION CHARACTERIZED BY A CAPACITY OR CAPACITOR 13, CONNECTED IN PARALLEL WITH THE CONTROL WINDING 9, AND WHOSE SIZE IS CHOSEN TO A VALUE SUCH THAT THE CONTROL PULSES INDUCED IN THE CONTROL WINDING 9 NO LONGER REACH, FOR A PREDETERMINED LIMIT SPEED OF ROTATION OF THE ENGINE, THE THYRISTOR 6 CONNECTION CONTROL THRESHOLD. C. THE INVENTION APPLIES TO AN INTERNAL COMBUSTION ENGINE IGNITION SYSTEM.

Description

Ignition system with magnets and capacitors

  high voltage for internal combustion engines ".

  * The present invention relates to an

  ignition system for internal combustion engines with magnets and high voltage capacitors, consisting of a generator energized by means of permanent magnets with alternating polarities, with a winding for charging a capacitor and a control winding, which serves

  only for the control of a semiconductor contactor

  at the moment of ignition, by discharge of the

  capacitor on an ignition coil.

  For specific cases of internal combustion engines, it is necessary to oppose exceeding a given rotational speed This obligation is often achieved by disconnecting the ignition, the load of the capacitor or capacitor

  being prohibited by the limiting speed of rotation

  (DE 26 00 824 and 24 19 776) For this purpose, additional semiconductors are used for the control of which other control pulses are provided. This provision leads to increased expenditure.

of building elements.

  On the other hand, it is known to oppose, by a special signal, of fixed duration, to the influence

  of the control pulse on the semiconductor contactor

  The signal is then produced by a rocking arrangement, which is however too much

  expensive for this area of use.

  Such semiconductor elements

  also have a consequence

  certain limitation of the reliability of operation.

  The purpose of the invention is to simplify the driving of an intense combustion engine and to protect the entrained aggregates, with however a cost of

  eligible construction and greater reliability.

  The invention proposes to oppose the production of an ignition spark over a

  predetermined speed of rotation, without requiring any

  additional generator bearings or contact

  semi-conductor, with the simplest possibility of connection, in existing installations,

  For this purpose, the invention conforms to the

  The invention is characterized in that, in parallel with the control winding, a capacitor or capacitor is mounted whose capacitance is selected so that the control pulses induced in the winding

  command no longer reach, for a rotation speed

  the motor, the trip threshold

of a semiconductor contactor.

  By switching on or off

  other capabilities, it is possible to make a change

  continuous, continuous application of rotational speed.

  In addition, it is advantageous to connect a thermistor in parallel

  with the control winding The implementation of ele-

  passive construction allows, without problems, the

  realization of a reliable installation, which can easily

  be installed on existing ignition systems. The invention is explained below, with the aid of an exemplary embodiment, represented in the

single figure of the appended drawing.

  The shaft of an internal combustion engine (not shown) rotates in the direction of the arrow, a pole wheel 1 which contains several permanent magnets 2 of polarity N (north) and S (south) with respect to the neighbor magnet A charge winding 3 is

  connected, through a diode 4, to a capacitor (or capacitor)

  cited) 5, and at the anode of a thyristor 6, as a semiconductor contactor A-following the capacitor 5, is connected the primary winding of an ignition coil, 7, whose secondary winding is connected to a candle

ignition 8.

  The control circuit consists of one.

  commed and 9 winding which is connected, through a resistor arrangement 10 and a diode 11, to the control terminal of the thyristor 6 capacitors 12, 13 and a

  thermistor 14 are connected in parallel with the latch

  The capacitor 12 is mounted in

series with contactor 15.

  By a rotation of the pole wheel 1 is induced continuously, in the charge winding 3, a voltage whose positive half waves charge

  the capacitor 5 through a diode 4 In the winding

  control system 9 are induced, thanks to a

  appropriate permanent magnets 2 determined, at the instant of ignition of the motor, voltage pulses which are applied to the resistor network-mounting 10 which loads the control winding 9 to ensure a function The positive control pulses pass through the diode 11 to the control terminal of the thyristor and connect it in circuit. Thus, the capacitor 5 can discharge through the primary winding of the coil. ignition 7 and cause the known training process

  from spark to spark plug 8.

  The control winding 9 is then additionally charged by the capacitor 13 and this

  The Office of the Prosecutor believes, with increasing frequency,

  control, ie with an increasing motor rotation speed, until the control pulses are sufficiently lowered so that they no longer reach the control threshold necessary for the implementation. in circuit of the thyristor 6 So, it no longer forms a spark in the spark plug 8 and the speed

  engine rotation decreases to a lower value than

  above the predetermined limit value A lower capacity produces a higher speed limit value By switching on or off the additional capacitors 12, by means of a contactor, it is thus possible to pre-set a

  lower or higher limit rotation speed.

  This is advantageous for engine use cases

  for which different speeds of rotation

you need to

  The thermistor 14, with its heating, has lower resistance values and thus compensates for the influences of temperature in

  the control circuit as a whole, so that the variation

  rotation speed of the motor with the warm-up

is limited.

R E V E N D I C E N T IO N S

  ) Ignition system with magnets

  and high-voltage capacitors, for combustion engines

  internal arrangement, comprising a generator energized by means of permanent magnets with alternating polarities, with a coil for charging a capacitance and a control winding serving only for the control of a semiconductor contactor for the discharge of the capacitance on an ignition coil, an installation characterized by a capacitance or capacitor (13), connected in parallel with the control winding (9), and whose magnitude is chosen to a value such that the control pulses induced in the control winding (9) no longer reach, for a predetermined limit rotation speed

  of the motor, the connection control threshold of a thy-

ristor (6).

  Installation according to Claim 1, characterized in that the control winding (9)

  is connected in parallel, in addition to the capacitor or

  cited (13) with series connection of a capacitor (12)

and a contactor (15).

  Installation according to Claim 1, characterized in that the control winding (9)

  is connected in parallel with a thermistor (14).