System and method for protecting a cranking subsystem

• US 6,497,209 B1
• Filed: 09/01/2000
• Issued: 12/24/2002
• Est. Priority Date: 09/10/1999
• Status: Expired due to Fees

• Current Assignee: Midtronics Incorporated, Westmont Venture Partners, LLC, CNF Ventures, LLC (XPO, Inc.)
• Original Assignee: Intra International AB (Midtronics Incorporated)
• Inventors: Thomsen, Jes, Karuppana, Samy V., Jetha, Aly Amirali
• Primary Examiner(s): Argenbright, Tony M.
• Assistant Examiner(s): HUYNH, HAI H
• Application Number:
  US09/654,188
• Time in Patent Office: 844 Days
• Field of Search: 123/179.3, 123/179.25, 307/9.1, 307/10.1, 307/10.6, 307/10.7, 318/139, 290/38.C, 290/38.R, 290/34, 290/51
• US Class Current: 123/179.3
• CPC Class Codes: F02N 11/08 Circuits or control means specially adapted for starting of engines
• CPC Class Codes: F02N 11/087 Details of the switching means in starting circuits, e.g. relays or electronic switches
• CPC Class Codes: F02N 11/10 Safety devices F02N11/08 takes precedence
• CPC Class Codes: F02N 11/101 for preventing engine starter actuation or engagement
• CPC Class Codes: F02N 2200/063 Battery voltage

Abstract

A method and system for controlling power to a cranking subsystem in a device having a power source is disclosed. The cranking subsystem is coupled to an engine and a starter that allows a user to activate the cranking subsystem. The method and system include providing a switch and at least one controller. The switch is coupled between the power source and the cranking subsystem. The at least one controller is coupled with the switch and is for controlling the switch to be open or closed based on the starter being used to activate the cranking subsystem and at least one other criteria. The at least one other criteria is programmed into the controller.

Claims

1. A system for controlling power to a cranking subsystem in a device having a power source, the cranking subsystem coupled to an engine and a starter for allowing a user to activate the cranking subsystem, the system comprising:

a switch coupled between the power source and the cranking subsystem; and

at least one controller, coupled with the switch, for controlling the switch to be open or closed based on the starter being used to activate the cranking subsystem and at least one other criteria, the at least one other criteria being programmed into the controller, the at least one other criteria including the cranking subsystem running for less than a particular time at a particular current, the controller opening the switch to cut off power to the cranking subsystem if greater than or equal to the particular current has flowed to the cranking subsystem through the switch for greater than or equal to the particular time.

2. The system of claim 1 wherein the at least one other criteria includes the power source having at least a particular power level.

3. The system of claim 1 wherein the at least one other criteria includes the switch having a temperature not exceeding a particular temperature.

4. The system of claim 1 wherein controller receives an input signal from the device, wherein the power source includes a battery, wherein the at least one other criteria includes the battery having at least a particular voltage and wherein the input signal indicates a voltage of the battery.

5. The system of claim 1 wherein controller receives an input signal from the device, wherein the at least one other criteria includes cranking subsystem running for less than a particular time at a particular current and wherein the input signal indicates a current through the cranking subsystem and a time for which the current has been provided.

6. The system of claim 1 further comprising:

an internal sensor for monitoring a property of the system and providing a signal to the controller; and

wherein controller receives a signal from the internal sensor, the at least one criteria depending upon the signal from the internal sensor.

7. The system of claim 6 wherein the internal sensor further includes a temperature sensor and wherein the at least one criteria includes a temperature of the switch not exceeding a particular temperature.

8. The system of claim 1 wherein the cranking subsystem includes a starter motor and wherein the engine includes a front gear and wherein the switch cutting off the power to the cranking subsystem prevents the starter motor from being pulled and/or held to the front gear of the engine.

9. A method for controlling power to a cranking subsystem in a device having a power source, the cranking subsystem coupled to an engine and a starter for allowing a user to activate the cranking subsystem, the method comprising the steps of:

providing a switch coupled between the power source and the cranking subsystem; and

providing at least one controller, coupled with the switch, for controlling the switch to be open or closed based on the starter being used to activate the cranking subsystem and at least one other criteria, the at least one other criteria being programmed into the controller, the at least one other criteria including the cranking subsystem running for less than a particular time at a particular current, the controller opening the switch to cut off power to the cranking subsystem if greater than or equal to the particular current has flowed to the cranking subsystem through the switch for greater than or equal to the particular time.

10. The method of claim 9 wherein the at least one other criteria includes the power source having at least a particular power level.

11. The method of claim 9 wherein the at least one other criteria includes the switch having a temperature not exceeding a particular temperature.

12. The method of claim 9 wherein controller receives an input signal from the device, wherein the power source includes a battery, wherein the at least one other criteria includes the battery having at least a particular voltage and wherein the input signal indicates a voltage of the battery.

13. The method of claim 9 wherein controller receives an input signal from the device, wherein the at least one other criteria includes cranking subsystem running for less than a particular time at a particular current and wherein the input signal indicates a current through the cranking subsystem and a time for which the current has been provided.

14. The method of claim 9 further comprising the step of:

providing an internal sensor for monitoring a property of the system and providing a signal to the controller; and

wherein controller receives a signal from the internal sensor, the at least one criteria depending upon the signal from the internal sensor.

15. The method of claim 14 wherein the internal sensor further includes a temperature sensor and wherein the at least one criteria includes a temperature of the switch not exceeding a particular temperature.

16. The method of claim 9 wherein the cranking subsystem includes a starter motor and wherein the engine includes a front gear and wherein the switch cutting off the power to the cranking subsystem prevents the starter motor from being pulled and/or held to the front gear of the engine.

17. A method for controlling power to a cranking subsystem in a device having a power source, the cranking subsystem coupled to an engine and a starter for allowing a user to activate the cranking subsystem, the method comprising the steps of:

utilizing a switch and at least one controller to control power being provided to the cranking subsystem, the switch coupled between the power source and the cranking subsystem, the at least one controller coupled with the switch and controlling the switch to be open or closed based on the starter being used to activate the cranking subsystem and at least one other criteria, the at least one other criteria being programmed into the controller, the at least one other criteria including the cranking subsystem running for less than a particular time at a particular current, the controller opening the switch to cut off power to the cranking subsystem if greater than or equal to the particular current has flowed to the cranking subsystem through the switch for greater than or equal to the particular time.

18. The method of claim 17 wherein the at least one other criteria includes the power source having at least a particular power level.

19. The method of claim 17 wherein the at least one other criteria includes the switch having a temperature not exceeding a particular temperature.

20. The method of claim 17 wherein controller receives an input signal from the device, wherein the power source includes a battery, wherein the at least one other criteria includes the battery having at least a particular voltage and wherein the input signal indicates a voltage of the battery.

21. The method of claim 17 wherein controller receives an input signal from the device, wherein the at least one other criteria includes cranking subsystem running for less than a particular time at a particular current and wherein the input signal indicates a current through the cranking subsystem and a time for which the current has been provided.

22. The method of claim 17 wherein the cranking subsystem includes a starter motor and wherein the engine includes a front gear and wherein the switch cutting off the power to the cranking subsystem prevents the starter motor from being pulled and/or held to the front gear of the engine.