GB2307716A

GB2307716A - Spark-ignition circuit

Info

Publication number: GB2307716A
Application number: GB9524595A
Authority: GB
Inventors: Frantisek Filipovic
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-01
Filing date: 1995-12-01
Publication date: 1997-06-04
Anticipated expiration: 2015-12-01
Also published as: GB2307716B; GB9524595D0

Abstract

The transistor switch 4 controlling the primary winding of the ignition coil 2 is connected to the winding by a commutating capacitor 3. The switch 4 may include two transistors (Fig.5) or one transistor and a contact breaker (Fig.6).

Description

THE ELECEkIC IGNITION tr ITH LINEAR BREEZING OF COItEt;UTAT24G CURRENT.

Technical field.

The invention is conserned about electric ignition for explosion engines with ignition of the mixture by electric spark.

Simultaneous state.

Up to now is know that the electric ignitions do not reach at the same time : the considerable steepness of induced voltage and sufficient enlarge of ignition impulse, what is a dis adv ant age .

For example at the battery ignition and the hithero existing of transistotized ignition it is dow to first of all useing the commutating capacitor in commutating circuit.

Background.

The disadvantage introduced above remove the electric ignition with linear breaking of commutating current according the invention, which backround is, that in section of commutating circuit is in the series conncted with primary winding of ignition coil with magnetic core in saturated state above the level of reversible process with the characteristic supersaturated with the steepness dB/dH unnull over the conductive coupling with the attendant of connection commutating capacitor the switch transistorized with the tripping characteristic advantageous saturated and necessary in section linear with the steepness dI/dt negative.

By linear breaking of the commutating current according to the law about electromagnetic induction will be induced voltage of ignition impulse with maximum steepness dU/dt and saturing of magnetic core above the level of reversible process with advantage after the elbow the characteristic of induction B / intensity H is reached the relaxation all energy into one impulse.

Advantages.

The advantage of this solucion is, that all is directioned to the reach the maximum steepness dU/dt and bigger energy of the ignition impulse, what is neccessary for the reach the low consumption of the fuel, the lowering harmful substance especially at poor mixtures and there are others advantages.

Drawings.

FIGURE 1 shows the example of connection according to invention.

FIGURE 2 shows the characteristic supersaturated the ignition coil with magnetic core. There is marked advantageous position of the point P(H,B), the level of reversible process is marked B1, the elbow of characteristic B/H is marked B2.

FIGURE 3 shows the transistorized tripping characteristic.

There is marked the section tO - tl, what is advantageous corresponded to saturated state of transistor by the course of commutating current I. In section tl - t2 is the behavior of commutating current I linear with the steepness dI/dt negative.

FIGURE 4 shows the behavior of ignition impulse.

FIGURE 5 shows the modification of connection of the switch transistorized with auxillary transistor and with the resistor.

FIGURE 6 shows the modification of connection of the switch transistorized with mechanical breaker and with the resistor.

Example of connection according to invention.

The electric ignition with linear breakig of commutating current according FIG.1 has commutating circuit in series interconnection of supply 1 voltage, the primary winding ignition coil 2 with characteristic supersaturated, the conductive coupling 3 of attendant of connection commutating capacitor, the switch 4 transistorized with tripping characteristic neccessary in section linear0 The operating cicuit for control of commutating current I over the switch 4 transistorized is assembled from the indicator 6 of position of winding object and from control circuit 5.

Magnetic core of ignition coil 2 is by course commutating current I in saturated state, necessary above the level of reversible process with advantage after the elbow characteristic induction B / intensity H with steepness dB/dH unnull, what is characteristic supersaturated.

The transistor of switch 4 transistorized is the course of commutating current I advantageous in saturated state and by breaking current in time tO, according FIG.3, is tripping characteristic in section tl - t2 necessary linear and according to the law about electromagnetic induction is know by linear breaking commutating current I in primary windig of ignition coil 2 with characteristic supersaturated will be inductioned the voltage, of ignition impulse, with maximum steepness dU/dt. And ai the same time should be know if magnetic core is in saturated state above the level reversible process then all accumulating magnetic energy is released by inertia and by connection commutating circuit, according to law.

By this is reached the released approximately all energy into one impulse, what is marked on FIG.4.

This behaviour might be different, could be by modifications connection of the switch 4 transistorized according FIG.5, FIG.6.

Industrial utility.

The connection according the invention they are possible to be used for the electric ignitions to the explosion engines, first of all for cars.

This would be good aleo for the motorcycles.

Claims

1 The electric ignition with linear breaking of commutating current has commutating cicuit in series interconnection the supply voltage, the primary winding of ignition coil, the conuctive coupling, switch transistorized and operating circuit assembled from the indicator of position of rotors object, the control circuit, c h a r a c t e r i z e d in that in section of commutating circuit is in the series connected with primary winding of ignition coil (2) with magnetic core in saturated state overhead the level of reversible process with the characteristic supersaturated with the steepness dB/dH unnull over the conductive coupling (3) of the attendant of connection commutating capacitor the switch (4) transistorized with the tripping characteristic advantageous saturated and necessary in section linear with the steepness dI/dt negative.

2 A connection as claimed in Claim 1, c h a r a c t e r i z e d in that the switch (4) transistorized is in the modification of connection, So that by the emitter E of transistor is connected the auxiliary transistor and the resistor R with the value unnull0 3 A connection as claimed in Claim 1, c h a r a c t e r i z e d in that the switch (4) transistorized is in the modifi- cation of conection, so that by the emitter E of transistor is connected the mechanical breaker and the resistor R with the value unnull to infinity.