System and method for controlling vehicle idling and maintaining vehicle electrical system integrity

• US 8,154,251 B2
• Filed: 10/15/2007
• Issued: 04/10/2012
• Est. Priority Date: 07/13/2007
• Status: Active Grant

• Current Assignee: Cummins Incorporated
• Original Assignee: Cummins Incorporated
• Inventors: Oakes, Jeffrey L.
• Primary Examiner(s): WILLIAMS, ARUN C
• Application Number:
  US11/974,640
• Publication Number:
  US 20090015203A1
• Time in Patent Office: 1,639 Days
• Field of Search: 320/132
• US Class Current: 320/132
• CPC Class Codes: B60H 1/322 for improving the stop or idling operation of the engine
• CPC Class Codes: B60H 2001/2262 related to the period of on/off time of the heater
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G05D 23/1917 using digital means
• CPC Class Codes: G06Q 40/00 Finance; Insurance; Tax strategies; Processing of corporate or income taxes
• CPC Class Codes: H01M 10/441 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H02J 9/002 in which a reserve is maintained in an energy source by disconnecting non-critical loads, e.g. maintaining a reserve of charge in a vehicle battery for starting an engine
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A battery charge maintenance system for a vehicle is provided.

Claims

1. A non-transitory computer readable medium containing instructions that when executed by a computer perform steps to affect temperature, the steps comprising:

providing a portion of an amount of energy to at least one load wherein the load is an environment control element;

determining the amount of energy stored in a power source;

determining a first state of charge value in response to a steady-state state of charge observed during a start up event;

determining a battery type;

determining a second state of charge value in response to the battery type;

determining an adaptive threshold in response to the first state of charge and the second state of charge;

comparing the energy stored in the power source to the adaptive threshold; and

providing disconnect of the power source from the loads when the comparing step determines that the energy stored in the power source is less than the adaptive threshold.

2. The non-transitory computer readable medium of claim 1, the steps further comprising:

automatically activating a charging device for the power source.

3. The non-transitory computer readable medium of claim 2, wherein the charging device is an alternator.

4. The non-transitory computer readable medium of claim 2, wherein step of automatically activating a charging device includes the step of starting an engine.

5. The non-transitory computer readable medium of claim 1, wherein the step of determining the amount of energy stored in the power source includes the steps of:

determining the power delivered to the power source while a charging device is active, and

determining the power used from the power source while the charging device is not active.

6. The non-transitory computer readable medium of claim 1, wherein the adaptive threshold is an amount of charge necessary to start an engine.

7. The non-transitory computer readable medium of claim 1, wherein the power source is at least one battery.

8. The non-transitory computer readable medium of claim 7, wherein the power source is a plurality of batteries electrically coupled together.

9. The non-transitory computer readable medium of claim 1, the steps further comprising:

determining an operation status of a vehicle housing the computer.

10. The non-transitory computer readable medium of claim 9, wherein the step of determining an operation status of a vehicle housing the computer is performed prior to the step of providing disconnect of the power source.

11. A method of controlling an electrical system of a vehicle including the steps of:

providing a portion of an amount of energy to at least one load wherein the load is an environment control element;

determining an amount of energy stored in a power source;

determining a first state of charge value in response to a steady-state state of charge observed during a start up event;

determining a battery type;

determining a second state of charge value in response to the battery type;

determining an adaptive threshold in response to the first state of charge and the second state of charge;

comparing the energy stored in the power source to the adaptive threshold; and

providing disconnect of the power source from the loads when the comparing step determines that the energy stored in the power source is less than the adaptive threshold.

12. The method of claim 11, further including the step of automatically starting an engine of the vehicle.

13. The method of claim 11, further including the step of determining a number of on/off cycles performed with a previous time period and comparing that number to a pre-determined limit so as to prevent another cycle if the pre-determined limit is equaled by the number of on/off cycles performed with the previous time period.

14. The method of claim 11, further including the step of causing a second power source to provide power to the power source.

15. The method of claim 12, wherein the power source is an alternator coupled to an engine.

16. The method of claim 11, wherein the step of determining an amount of energy stored in a power source includes the steps of:

determining an amount of power supplied to a battery during operation of an engine, and

determining an amount of power delivered by the battery when the engine is off.

17. The method of claim 16, wherein the step of determining an amount of energy stored in a power source further includes the step of:

comparing the amount of power supplied to a battery during operation of an engine and the amount of power delivered by the battery when the engine is off.

18. The method of claim 11, wherein the adaptive threshold is an amount of charge necessary to start an engine.

19. The method of claim 11, further including the step of determining an operation status of the vehicle.

20. The method of claim 19, wherein the step of determining an operation status of the vehicle is performed prior to the step of providing disconnect of the power source from loads.