Method and system for controlling one of a glow plug heater system and a grid heater system in an automotive vehicle

• US 5,634,443 A
• Filed: 11/20/1995
• Issued: 06/03/1997
• Est. Priority Date: 11/20/1995
• Status: Expired due to Term

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Motor Company
• Inventors: Mathews, Jacob
• Primary Examiner(s): Solis, Erick R.
• Application Number:
  US08/560,569
• Time in Patent Office: 561 Days
• Field of Search: 123/142.5 E, 123/179.21
• US Class Current: 123/179.21
• CPC Class Codes: F02N 19/04 by heating of fluids used in engines
• CPC Class Codes: F02P 19/027 Safety devices, e.g. for diagnosing the glow plugs or the related circuits

Abstract

A method and system for controlling one of a glow plug heater system and a grid heater system in an automotive vehicle. A common controller is provided programmed with a first control algorithm for controlling a glow plug heater system and a second control algorithm for controlling a grid heater system. A control signal is obtained upon detecting whether the heater system is a glow plug heater system or a grid heater system. Based on the control signal, the common controller then controls the glow plug heater system according to the first control algorithm and controls the grid heater system according to the second control algorithm. The common controller further includes a diagnostic algorithm for performing a self-diagnostic test on the heater system upon receiving a diagnostic signal generated either manually or automatically.

Claims

1. A system for controlling one of a glow plug heater system and a grid heater system in an automotive vehicle comprising:

a common controller programmed with a first control algorithm for controlling a glow plug heater system and a second control algorithm for controlling a grid heater system;

at least one configurable pin for selecting one of the glow plug heater system and the grid heater system and generating a corresponding control signal; and

the common controller controlling the glow plug heater system according to the first control algorithm and controlling the grid heater system according to the second control algorithm based on the control signal.

2. The system as recited in claim 1 wherein the common controller is further programmed with a diagnostic algorithm for performing a self-diagnostic test on the system and the system further comprises the at least one configurable pin for generating a diagnostic signal and in response to the diagnostic signal, the common controller performing the self-diagnostic test according to the diagnostic algorithm.

3. The system as recited in claim 2 wherein the at least one configurable pin for generating the diagnostic signal includes a switch for manually generating the diagnostic signal.

4. The system as recited in claim 2 wherein the diagnostic signal is generated automatically.

5. The system as recited in claim 2 further comprising a display for displaying the outcome of the self-diagnostic test.

6. The system as recited in claim 5 wherein the display is a lamp.

7. A method for controlling one of a glow plug heater system and a grid heater system in an automotive vehicle comprising:

providing a common controller programmed with a first control algorithm for controlling a glow plug heater system and a second control algorithm for controlling a grid heater system and having at least one configurable pin;

detecting whether the heater system is a glow plug heater system or a grid heater system based on a configuration of the at least one configurable pin and generating a corresponding control signal; and

the controller controlling the glow plug heater system according to the first control algorithm and controlling the grid heater system according to the second control algorithm based on the control signal.

8. The method as recited in claim 7 wherein the common controller is further programmed with a diagnostic algorithm for performing a self-diagnostic test on the system and the method further comprises the step of generating a diagnostic signal and in response to the diagnostic signal, the common controller performing the self-diagnostic test according to the diagnostic algorithm.

9. The method as recited in claim 8 wherein the step of generating the diagnostic signal includes the step of manually generating the diagnostic signal.

10. The method as recited in claim 9 wherein the step of manually generating the diagnostic signal is performed utilizing a switch.

11. The method as recited in claim 8 wherein the step of generating the diagnostic signal includes the step of automatically generating the diagnostic signal.

12. The method as recited in claim 8 further comprising the step of displaying the outcome of the self-diagnostic test.

13. The method as recited in claim 12 wherein the step of displaying is performed utilizing a lamp.

14. A system for controlling one of a glow plug heater system and a grid heater system in an automotive vehicle and for performing a diagnostic test, the system comprising:

a common controller programmed with a first control algorithm for controlling a glow plug heater system, a second control algorithm for controlling a grid heater system, and a diagnostic algorithm for performing a self-diagnostic test on the system;

at least one configurable pin for selecting one of the glow plug heater system, the grid heater system or the diagnostic test and generating a corresponding control signal; and

the common controller controlling the glow plug heater system according to the first control algorithm, controlling the grid heater system according to the second control algorithm, or performing the self-diagnostic test according to the diagnostic algorithm based on the control signal.