Electronic ignition system

Claim 2

For use in an engine ignition system having a means to interrupt charging of a primary winding to provide a high potential in a secondary winding of a coil that is used to provide a spark discharge an electronic means to increase charging time prior to interruption thereof, said electronic means including the improvement of: A RC differentiating circuit controlling a transistor switching from non-conductive to conductive state; and diode means connected to said RC differentiating circuit to permit reverse bias of said transistor upon interruption of a signal to said circuit.

Claim 3

For use in an ignition system having means to provide sequential impulse signals by interrupting the connection of a power source to an ignition coil for initiating combustion in an internal combustion engine, a semiconductor circuit comprising: a second means connected to said first means to differentiate a signal from the latter to a fast decaying triggering pulse, said second means having a circuit comprised of diode means connected to the source to pass by way of said first means a positive potential upon decay of said triggering pulse to a resistance means; a first transistor connected to said second means by having its base connected to a portion of said second means and an emitter connected to said resistance means tobe triggered on by a signal in the portion and off by a signal passed by the resistance means; a third means to Amplify a signal from the first transistor when it is on; and a second transistor connected between the power source and the ignition coil to complete the circuit through the second transistor between the power source to the ignition coil in absence of a signal from said third means and to interrupt the circuit through the second transistor upon the event of receipt by said second transistor of a signal from said third means.

Claim 4

For use in an ignition system having means to provide sequential impulse signals by interrupting the connection of a power source to an ignition coil for initiating combustion in an internal combustion engine, a semiconductor circuit comprising: a second means connected to said first means to differentiate a signal from the latter to a fast decaying triggering pulse, said second means having a circuit comprised of diode means connected to the source to pass by way of said first means a positive potential upon decay of said triggering pulse to a resistance means; a first transistor connected to said second means by having its base connected to a portion of said second means and an emitter connected to said resistance means tobe triggered on by a signal in the portion and off by a signal passed by the resistance means; a third means to Amplify a signal from the first transistor when it is on; and a second transistor connected between the power source and the ignition coil to complete the circuit through the second transistor between the power source to the ignition coil in absence of a signal from said third means and to interrupt the circuit through the second transistor upon the event of receipt by said second transistor of a signal from said third means.

Claim 5

A means to connect a transistor to an ignition circuit comprising: a lead connecting a collector of the transistor to a power source: an RC differentiating means connecting the base of said transistor to the source; diode means connected to said RC differentiating means and said source; first switch means connected between said diodemeans and said source to cause current to bypass said RC differentiating means in one positionthereof to an emitter of said transistor and to said RC differentiating means in another position to drive said transistor to its non-conductive or its conductive state, respectively; and resistance means of lessor resistance than said RC differentiating means connecting said source to said emitter ofsaid transistor in said one position of said switch means to reverse bias said transistor to its non-conductive state to there after eliminate spurious signals other than shall pass said RC differentiating means to affect said transistor when said first switch means is in said another position.

Claim 6

A means to connect a transistor to an ignition circuit comprising: a lead connecting a collector of the transistor to a power source: an RC differentiating means connecting the base of said transistor to the source; diode means connected to said RC differentiating means and said source; first switch means connected between said diodemeans and said source to cause current to bypass said RC differentiating means in one positionthereof to an emitter of said transistor and to said RC differentiating means in another position to drive said transistor to its non-conductive or its conductive state, respectively; and resistance means of lessor resistance than said RC differentiating means connecting said source to said emitter ofsaid transistor in said one position of said switch means to reverse bias said transistor to its non-conductive state to there after eliminate spurious signals other than shall pass said RC differentiating means to affect said transistor when said first switch means is in said another position.

Claim 7

The structure of claim 3 and further comprising an amplifier connected to said transistor and operable by said transistor.

Claim 8

The structure of claim 4 and further comprising another transistor connected to said source, said lead being tapped to said amplifier such that said source can be diverted from said another transistor.

Claim 9

The structure of claim 5 and further comprising an ignition coil having a primary winding, a core and a secondary winding, said primary winding being connected to said another transistor and said source to be charged so long as said source is driving said transistor conductive.

Claim 10

The structure of claim 6 and further comprising: a second switch means between said another transistor and said primary winding; and a means to connect said second switch means to said first switch means for controlling whether said another transistor or said first switch means controls charging of said primary winding.