METHOD AND DEVICE FOR DETERMINING WHETHER AN ERROR CONDITION IS PRESENT OR NOT IN A MOTOR VEHICLE

• US 20170046887A1
• Filed: 08/15/2016
• Published: 02/16/2017
• Est. Priority Date: 08/14/2015
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: GRIMM, Andreas, Patino, Isidro Corral, Ballmann, Evgeniya, MUELLER, Bernd
• Granted Patent: US 10,140,787 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60Y 2200/92 Hybrid vehicles
• CPC Class Codes: B60Y 2306/15 Failure diagnostics
• CPC Class Codes: G05B 17/02 electric
• CPC Class Codes: G05B 23/0248 Causal models, e.g. fault tree; digraphs; qualitative physics
• CPC Class Codes: G07C 5/0816 Indicating performance data, e.g. occurrence of a malfunction

Abstract

A method for determining whether an error is present or not in a motor vehicle, a discrete state, in which the motor vehicle is presently in, being ascertained with the aid of a state machine, a decision being made, depending on the ascertained discrete state, whether an error is present or not, whereby the states of the state machine include acceptable states and unacceptable states, then, if the ascertained discrete state is an unacceptable state, the motor vehicle is transferred into an acceptable state.

Claims

1. A method for determining whether an error is present or not in a motor vehicle, the method comprising:

ascertaining a discrete state, in which the motor vehicle is presently in, with the aid of a state machine; and

making a decision, depending on the ascertained discrete state, whether an error is present or not;

wherein the states of the state machine include acceptable states and unacceptable states, and wherein

wherein if the ascertained discrete state is an unacceptable state, the motor vehicle is transferred into an acceptable state.

2. The method of claim 1, wherein, depending on the ascertained discrete state, a continuous actual operating parameter, which describes an operating state of the motor vehicle, is ascertained or not.

3. The method of claim 2, wherein, depending on the ascertained continuous actual operating parameter, a discrete unacceptable state is recommended, into which the state machine is to be transferred.

4. The method of claim 3, wherein the ascertained continuous actual operating parameter is compared with an ascertained setpoint operating parameter, and, depending on the result of this comparison, the discrete unacceptable state is recommended.

5. The method of claim 3, wherein the state machine is transferred into the recommended, discrete, unacceptable state.

6. The method of claim 3, wherein the recommended, discrete, unacceptable state is checked for plausibility and, depending on the result of this check, the state machine is transferred into the recommended, discrete, unacceptable state.

7. The method of claim 2, wherein the ascertainment of the continuous actual operating parameter is ascertained with the aid of a characteristic diagram or a mathematical function.

8. A computer readable medium having a computer program, which is executable by a processor, comprising:

a program code arrangement having program code for determining whether an error is present or not in a motor vehicle, by performing the following;

ascertaining a discrete state, in which the motor vehicle is presently in, with the aid of a state machine; and

making a decision, depending on the ascertained discrete state, whether an error is present or not;

wherein the states of the state machine include acceptable states and unacceptable states, and wherein

wherein if the ascertained discrete state is an unacceptable state, the motor vehicle is transferred into an acceptable state.

9. The computer readable medium of claim 8, wherein, depending on the ascertained discrete state, a continuous actual operating parameter, which describes an operating state of the motor vehicle, is ascertained or not.

10. A control unit for determining whether an error is present or not in a motor vehicle, comprising:

a control arrangement configured to perform the following;

ascertaining a discrete state, in which the motor vehicle is presently in, with the aid of a state machine; and

making a decision, depending on the ascertained discrete state, whether an error is present or not;

wherein the states of the state machine include acceptable states and unacceptable states, and wherein

wherein if the ascertained discrete state is an unacceptable state, the motor vehicle is transferred into an acceptable state.