METHOD FOR DETECTING ERRORS IN A CONTROL UNIT

• US 20110153145A1
• Filed: 12/10/2010
• Published: 06/23/2011
• Est. Priority Date: 12/18/2009
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: KETTENACKER, Guenter
• Application Number:
  US12/965,386
• Publication Number:
  US 20110153145A1
• Time in Patent Office: Days
• US Class Current: 701/29
• CPC Class Codes: B60W 2050/0039 of the propulsion unit
• CPC Class Codes: B60W 2710/0666 Engine torque
• CPC Class Codes: B60W 50/04 Monitoring the functioning of the control system
• CPC Class Codes: F02D 2041/286 comprising means for signal processing
• CPC Class Codes: F02D 2200/0614 Actual fuel mass or fuel injection amount
• CPC Class Codes: F02D 2200/1002 Output torque
• CPC Class Codes: F02D 2200/101 Engine speed
• CPC Class Codes: F02D 41/22 Safety or indicating devices for abnormal conditions in air/fuel ratio feedback systems F02D41/1495, in electric control linkage F02D11/107, in purge control systems F02M25/0809

Abstract

A method is described for detecting errors in a control unit for controlling and/or regulating an engine in a vehicle, in which the presence of a faulty state of the engine and/or the vehicle is detected, a difference between at least one instantaneous value of an operating variable and a limiting value provided for this operating variable being formed multiple times, the formed differences being added to a sum, and the faulty state being evaluated as an error if the sum exceeds a predefinable threshold value.

Claims

1. A method for detecting errors in a control unit for at least one of controlling and regulating an engine in a vehicle, the method comprising:

detecting a faulty state of at least one of the engine and the vehicle;

forming, multiple times, a difference between at least one instantaneous value of an operating variable and a limiting value provided for this operating variable;

adding the formed differences to a sum; and

evaluating the faulty state as an error if the sum exceeds a predefinable threshold value.

2. The method of claim 1, wherein the threshold value is selected as a function of the operating variable.

3. The method of claim 1, wherein a debounce time is predefined, and wherein the faulty state is evaluated as an error after expiration of the debounce time.

4. The method of claim 1, wherein the limiting value is varied.

5. The method of claim 1, wherein the operating variable is at least one of a torque, a pressure, an exhaust gas value, an engine speed, an engine performance, a temperature, a metered fuel quantity, and a fuel injection activation time.

6. The method of claim 1, wherein a variable characterizing the operating variable is added to a counter content, and wherein a variable characterizing the limiting value is subtracted from the counter content.

7. The method of claim 1, wherein a constant is continuously added to the sum when the operating variable exceeds the limiting value.

8. The method of claim 1, wherein the sum is limited to the lower threshold value if the sum falls below a lower threshold value.

9. A computer readable medium having a computer program, which is executable on a control unit, comprising:

a program code arrangement having program code for detecting errors in a control unit for at least one of controlling and regulating an engine in a vehicle, by performing the following;

detecting a faulty state of at least one of the engine and the vehicle;

forming, multiple times, a difference between at least one instantaneous value of an operating variable and a limiting value provided for this operating variable;

adding the formed differences to a sum; and

evaluating the faulty state as an error if the sum exceeds a predefinable threshold value.

10. The computer readable medium of claim 9, wherein a variable characterizing the operating variable is added to a counter content, and wherein a variable characterizing the limiting value is subtracted from the counter content.

11. A control unit in a vehicle for detecting errors in a control unit for at least one of controlling and regulating an engine in a vehicle, the method comprising:

a detecting arrangement to detect a faulty state of at least one of the engine and the vehicle;

a forming arrangement to form, multiple times, a difference between at least one instantaneous value of an operating variable and a limiting value provided for this operating variable;

an adding arrangement to add the formed differences to a sum; and

an evaluating arrangement to evaluate the faulty state as an error if the sum exceeds a predefinable threshold value.