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Method and apparatus for fault detection in a controller area network

A controller and fault technology, applied in bus network, data exchange network, error detection/correction, etc., can solve problems such as inability to distinguish transient faults from intermittent faults, and inability to identify the root cause of faults

Active Publication Date: 2015-03-25
GM GLOBAL TECH OPERATIONS LLC
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Such detection systems generally cannot identify the root cause of the fault and cannot differentiate between transient and intermittent faults

Method used

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  • Method and apparatus for fault detection in a controller area network
  • Method and apparatus for fault detection in a controller area network
  • Method and apparatus for fault detection in a controller area network

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Embodiment Construction

[0059] Referring now to the drawings, wherein the drawings are only for illustrating certain exemplary embodiments and not for limiting the invention, figure 1 A vehicle 8 is schematically shown comprising a controller area network (CAN) comprising a CAN bus 15 and a plurality of nodes, ie controllers 10 , 20 , 30 and 40 . The term "node" refers to any active electronic device that is signally connected to the CAN bus 15 and capable of sending, receiving or forwarding information over the CAN bus 15 . Each controller 10 , 20 , 30 and 40 is signally connected to the CAN bus 15 and electrically connected to the power grid 60 and the ground grid 70 . Each controller 10 , 20 , 30 , and 40 includes an electronic controller or other on-board device configured to monitor or control the operation of subsystems of the vehicle 8 and communicate via the CAN bus 15 . In one embodiment, one of the controllers, such as controller 40, is configured to monitor CAN 50 and CAN bus 15, and may ...

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Abstract

The invention provides a method and apparatus for fault detection in a controller area network. A controller area network (CAN) has a plurality of CAN elements including a communication bus and a plurality of controllers. A method for monitoring the CAN includes detecting occurrences of a first short-lived fault and a second short-lived fault within a predefined time window. A first fault set including at least one inactive controller associated with the first short-lived fault and a second fault set including at least one inactive controller associated with the second short-lived fault are identified. An intermittent fault is located in the CAN based upon the first and second fault sets.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 61 / 878,538, filed September 16, 2013, which is incorporated herein by reference. technical field [0003] The present invention relates to fault isolation associated with communications in a controller area network. Background technique [0004] The statements in this section merely provide background information related to the present invention. Accordingly, such citation is not intended to constitute an admission of prior art. [0005] A vehicle system includes a number of subsystems including, by way of example, the engine, transmission, seat / handling, brakes, HVAC, and occupant protection. Multiple controllers can be used to monitor and control the operation of the subsystems. The controller may be configured to communicate via a controller area network (CAN) to coordinate operation of the vehicle in response to operator commands, vehicle oper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/26H04L12/40
CPCG06F11/0739G06F11/079H04L43/0823H04L12/40169H04L2012/40215G06F11/3006G06F11/30
Inventor S.蒋Y.张
Owner GM GLOBAL TECH OPERATIONS LLC
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