Dual coil ignition system

Patent metadata

Field	Value
Publication number	US-10006432-B2
Application number	US-201615236545-A
Country	US
Kind code	B2
Filing date	Aug 15, 2016
Priority date	Dec 4, 2013
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

A method of responding to a detected blowout in a coil ignition system is provided in this disclosure. The method includes receiving a characteristic regarding operation of a coil ignition system; determining a blowout condition exists for the coil ignition system based on the characteristic; and providing a command to the coil ignition system based on the determination that the blowout condition exists, wherein the command is structured to reduce a residual charge amount in the coil ignition system.

First claim

What is claimed is:

1. An apparatus, comprising:
a coil signal generator module structured to alternate a leading coil in a multi-coil ignition system each engine cycle; and
a charging module structured to determine whether a coil of the multi-coil ignition system is operational based on operation data regarding the coil relative to an operational threshold when the coil is the leading coil.

2. The apparatus of claim 1 , wherein the operational threshold is a time threshold for reaching a charging current threshold and the operation data is a time duration to reach the charging current threshold.

3. The apparatus of claim 2 , wherein the charging module is structured to determine the coil is non-operational based on the time duration being greater than or equal to the time threshold.

4. The apparatus of claim 2 , wherein the charging module is structured to determine the coil is operational based on the time duration being less than the time threshold.

5. The apparatus of claim 2 , wherein the charging current threshold includes at least one of a voltage and a current suitable for causing a spark from an ignitor of the multi-coil ignition system.

6. The apparatus of claim 1 , wherein the coil ignition system includes a first set of primary and secondary coils, a second set of primary and secondary coils, and an ignitor electrically coupled to each of the first and second sets of primary and secondary coils.

7. A system, comprising:
a coil ignition system including:
a first set of primary and secondary coils;
a second set of primary and secondary coils; and
an ignitor electrically coupled to the first and second sets of primary and secondary coils; and

a controller communicably coupled to the coil ignition system, the controller structured to alternate between the first set and second set of primary and secondary coils as a leading coil for the coil ignition each engine cycle.

8. The system of claim 7 , wherein the controller is structured to:
receive a charging current threshold for the leading coil;
receive a time duration for reaching the charging current threshold for the leading coil; and
determine an operational status of the first set of coils and the second set of coils based on the time duration relative to an operational threshold time duration.

9. The system of claim 8 , wherein the controller is structured to determine that at least one of the first set of coils and the second set of coils is non-operational based on the time duration for each set of coil being greater than the operational threshold time duration.

10. The system of claim 9 , wherein responsive to the controller determining that at least one of the first set of coils and the second set of coils is non-operational, the controller is structured to determine whether the non-operational at least one of the first set of coils and the second set of coils was also previously determined to be non-operational.

11. The system of claim 10 , wherein based on one of the at least one of the first set of coils and the second set of coils being determined to have been previously been determined to be non-operational, the controller is structured to stop alternating the leading coil and command the one of the first and second sets of coils not previously determined to be non-operational to be the leading coil.

12. The system of claim 7 , wherein based on the first and second sets of coils being determined to be non-operational and each being previously determined to be non-operational, the controller is structured to activate an indicator light.

13. The system of claim 7 , wherein the charging current threshold includes at least one of a voltage and a current suitable for causing a spark from the ignitor.

14. A method, comprising:
alternating, by a controller, a leading coil of a coil ignition system each engine cycle;
receiving, by the controller, a charging current threshold for the leading coil;
receiving, by the controller, a time duration for reaching the charging current threshold for a coil of the coil ignition system when the coil is the leading coil; and
determining, by the controller, an operational status of the coil based on the time duration for the coil relative to an operational threshold time duration.

15. The method of claim 14 , wherein the operational status of the coil is determined to be non-operational based on the time duration being greater than or equal to the operational threshold time duration.

16. The method of claim 14 , wherein responsive to a non-operational determination, further comprising activating, by the controller, an indicator light.

17. The method of claim 14 , wherein the operational status of the coil is determined to be operational based on the time duration being less than the operational threshold time duration.

18. The method of claim 14 , wherein the charging current threshold includes at least one of a voltage and a current suitable for causing a spark from an ignitor of the coil ignition system.

19. The method of claim 14 , wherein the charging current threshold is used with each coil in the coil ignition system, such that different charging current thresholds for each coil in the coil ignition system are not used.

Assignees

• Cummins Inc

Inventors

• Desai Akash S
• Kappaganthu Karthik
• Olivas Benjamin L
• Sprunger Douglas L
• Stroh David

Classifications

• F02P9/007

  by supplementary electrical discharge in the pre-ionised electrode interspace of the sparking plug, e.g. plasma jet ignition · CPC title

• F02P17/12

  Testing characteristics of the spark, ignition voltage or current (testing of sparking plugs H01T13/60) · CPC title

• F02P9/002

  Control of spark intensity, intensifying, lengthening, suppression (by means of current control in the storage devices F02P3/05, F02P3/09, during starting F02P15/12) · CPC title

• F02P11/02 Primary

  Preventing damage to engines or engine-driven gearing · CPC title

• F02P2017/123

  Generating additional sparks for diagnostics · CPC title