Ignition amplifier device

• US 4,983,882 A
• Filed: 07/19/1988
• Issued: 01/08/1991
• Est. Priority Date: 01/31/1986
• Status: Expired due to Fees

• Current Assignee: Isotec AG
• Original Assignee: Isotec AG
• Inventors: Mayring, Arnold
• Primary Examiner(s): LaRoche, Eugene R.
• Assistant Examiner(s): Shingleton, Michael B.
• Application Number:
  US07/222,318
• Time in Patent Office: 903 Days
• Field of Search: 315/51, 315/56, 315/58, 315/59, 315/289, 313/123, 313/124, 313/118, 313/134, 313/135, 313/140, 328/60, 123/169 R, 439/125, 439/127, 439/128, 439/893, 439/932
• US Class Current: 315/59
• CPC Class Codes: F02P 9/002 Control of spark intensity, intensifying, lengthening, suppression by means of current control in the storage devices F02P3/05, F02P3/09, during starting F02P15/12

Abstract

An ignition amplifier device for the secondary circuit of an ignition system comprises the series connection of a spark gap having an electrode spacing of between 0.05 and 0.2 mm with a condenser. The so formed series connection is shunted to the electrodes of the spark plug.

Claims

1. An ignition amplifier device for use with a spark plug in enhancing the spark generated at a first spark gap created by the first and second electrodes of the spark plug, comprising:

a condenser;

third and fourth electrodes, defining a second spark gap, electrically connected in series with the condenser to form an amplifier circuit; and

means for connecting the amplifier circuit in parallel with the electrodes of the spark plug.

2. The device of claim 1 wherein the second spark gap does not exceed 0.5mm.

3. The device of claim 1 wherein the second spark gap does not exceed 0.05 mm and 0.2 mm.

4. The device of claim 1 wherein the condenser is formed by a first conductive cylindrical member, a second conductive cylindrical member spaced apart from and surrounding the first conductive cylindrical member and an insulative layer between the first and second conductive cylindrical members.

5. An ignition amplifier device for use with a spark plug in enhancing the spark generated at a first spark gap created by the first and second electrodes of the spark plug, comprising:

a condenser, the condenser formed by a first conductive cylindrical member, a second conductive cylindrical member spaced apart from and surrounding the first conductive cylindrical member and an insulative layer between the first and second conductive cylindrical members;

third and fourth electrodes, defining a second spark gap, electrically connected in series with the condenser to form an amplifier circuit, the third electrode being formed by one of the first and second conductive cylindrical members; and

means for connecting the amplifier circuit in parallel with the electrodes of the spark plug.

6. The device of claim 5 wherein the third electrode is formed by the second conductive cylindrical member.

7. The device of claim 5 further comprising an insulating layer, having a perforation therethrough, covering the third electrode, the perforation defining said second spark gap.

8. The device of claim 5 wherein the fourth electrode is formed by a third conductive cylindrical member opposite and spaced apart from the third electrode to form an annular region therebetween.

13. The device of claim 5 wherein the outermost of the conductive cylindrical members is sized to make physical contact with and fit over the spark plug.

9. An ignition amplifier device for use with a spark plug in enhancing the spark generated at a first spark gap created by the first and second electrodes of the spark plug, comprising:

a condenser formed by a first conductive cylindrical member, a second conductive cylindrical member spaced apart from and surrounding the first conductive cylindrical member and an insulative layer between the first and second conductive cylindrical members;

third and fourth electrodes, defining a second spark gap, electrically connected in series with the condenser to form an amplifier circuit, the third electrode being formed by one of the first and second conductive cylindrical members;

the fourth electrode being formed by a third conductive cylindrical member opposite and spaced apart from the third electrode to form an annular region therebetween, the annular region containing an insulating material having a perforation, the perforation defining the second spark gap; and

means for connecting the amplifier circuit in parallel with the electrodes of the spark plug.

10. The device of claim 9 wherein the insulating material is an insulating foil.

11. The device of claim 10 wherein the third conductive cylindrical member is a metal foil.

12. The device of claim 11 further comprising a shrinkable sleeve surrounding the third conductive cylindrical member.

14. The device of claim 9 wherein the perforation is an annular opening in the insulating material.