Capacitor discharge ignition circuit
阅读：132发布：2023-09-07
专利汇可以提供Capacitor discharge ignition circuit专利检索，专利查询，专利分析的服务。并且A capacitor discharge ignition circuit for an internal combustion engine, the active components of which are substantially entirely solid state devices. An energy generation circuit is provided which includes a re-generative pulse amplifier and saturable transformer to convert the normal battery potential to a higher voltage. A capacitive energy storage circuit is coupled to the energy generation circuit and a triggerable switching device permits the stored energy to be discharged through the primary winding of the ignition coil. A triggering circuit which preferably has variable timing properties is coupled to the ignition breaker points and is used to time the triggering of the switching device.，下面是Capacitor discharge ignition circuit专利的具体信息内容。
1. In an ignition control circuit for an internal combustion engine comprising, in combination: a. a voltage generating circuit adapted to be connected to a source of direct current at a first potential for generating at an output voltage of a substantially higher potential; b. energy storage means coupled to said output of said voltage generating means for at least temporarily storing an electrical charge; c. means including triggerable switching means adapted to couple said energy storage means in series with the primary winding of an induction coil; and d. triggering means responsive to the opening and closing of ignition breaker points for applying triggering signals to said triggerable switching means such that when said triggerable switching means receives a triggering signal, the charge in said energy storage means is caused to flow through said primary winding for a predetermined time period, the improvement comprising: 1. said voltage generating circuit including a saturable transformer means having primary and secondary windings with means directly coupling said primary winding to said source of direct current potential; and 2. said triggering means comprising a semiconductor switching means having a pair of output electrodes and a control electrode, a capacitor connected in series with said pair of output electrodes and a control electrode, a capacitor connected in series with said pair of output electrodes and said triggerable SWITCHING means; means connecting said control electrode to said ignition breaker points; means for charging said capacitor to a predetermined voltage when said breaker points are closed and for rendering said semiconductor switching means conductive when said points are open.
2. said triggering means comprising a semiconductor switching means having a pair of output electrodes and a control electrode, a capacitor connected in series with said pair of output electrodes and a control electrode, a capacitor connected in series with said pair of output electrodes and said triggerable SWITCHING means; means connecting said control electrode to said ignition breaker points; means for charging said capacitor to a predetermined voltage when said breaker points are closed and for rendering said semiconductor switching means conductive when said points are open.
2. Apparatus as in claim 1 wherein said saturable transformer comprises a primary winding, a secondary winding and a feedback winding; semiconductor current controlling means having first, second and control electrodes; means connecting said first and second electrodes in series circuit with said primary winding and across a source of direct current; means connecting said feedback winding to said control electrode, such that when a current pulse flows through said primary winding, a voltage is induced in said feedback winding to enable additional current to flow through said primary winding and said semiconductor current controlling means in a regenerative manner to induce a voltage of a high potential across said secondary winding.
3. Apparatus as in claim 2 wherein said energy storage means is operatively coupled to said secondary winding.
4. Apparatus as in claim 3 wherein said energy storage means comprises at least one capacitor having first and second terminals; means connecting one of said terminals to one terminal of said secondary winding and a unidirectional current conducting device coupling said second terminal to the other terminal of said secondary winding.
5. Apparatus as in claim 1 wherein said triggerable switching means comprises a silicon controlled rectifier having a first and a second electrode and a trigger electrode, said first and second electrodes being connected in series circuit with said primary winding of said induction coil and said energy storage means.
6. Apparatus as in claim 5 and further including means for coupling said trigger electrode to said triggering means.
7. Apparatus as in claim 1 wherein said triggerable switching means comprises a triac having a pair of output electrodes connected in series circuit with said primary winding of said induction coil and said energy storage means.
8. Apparatus as in claim 7 wherein said trigger electrode is coupled to said triggering means.
9. Apparatus as in claim 1 wherein said means connecting said control electrode to said ignition breaker points includes a time delay network to maintain said semiconductor switching means non-conductive for a predetermined period following the opening of said ignition breaker points.
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