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A data code communication method, device, fault diagnosis instrument and combination instrument

A technology of fault diagnosis instrument and combination instrument, which is applied in the direction of digital transmission system, error prevention, electrical components, etc. It can solve the problems of complex fault diagnosis process, slow diagnosis process, long communication time, etc., so as to improve efficiency and reduce the number of times , The effect of simplifying the process of fault diagnosis

Active Publication Date: 2021-03-12
BEIJING ELECTRIC VEHICLE
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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a data code communication method, device, fault diagnosis instrument and combination meter, so as to solve the problem that the process of fault diagnosis of the vehicle combination meter in the prior art is complicated, the communication time is long, and the entire diagnosis process is relatively slow. slow problem

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  • A data code communication method, device, fault diagnosis instrument and combination instrument
  • A data code communication method, device, fault diagnosis instrument and combination instrument
  • A data code communication method, device, fault diagnosis instrument and combination instrument

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Embodiment Construction

[0049] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0050] The embodiments of the present invention aim at the fault diagnosis process of the existing vehicle-mounted combination instrument, the receiver needs to send the inverse code of the received data code to the sender, and the sender judges whether the data code received by the receiver is abnormal, resulting in a fault diagnosis process. The data code communication is complicated and the diagnosis time is long. A data code communication method is provided. When the data code is sent through the combination instrument, the difference code between the data code and the last data code is also sent, and the fault diagnosis instrument determines the reception. Whether the data code is abnormal, avoids the step of the fault diagnosis instrument sending th...

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Abstract

The present invention provides a data code communication method, device, fault diagnostic instrument and combination meter, and relates to the technical field of automobile fault detection. The method includes: receiving a first data code sent by a combination meter and the first data code and the The first difference code between the two data codes; wherein, the second data code is the last data code sent by the combination meter before sending the first data code; according to the first difference code, it is determined to receive When the received first data code is abnormal, an error code is sent to the combination meter. The scheme of the invention simplifies the fault diagnosis process of the vehicle combined instrument, reduces the times of data code communication, and improves the efficiency of data code communication.

Description

technical field [0001] The invention belongs to the technical field of automobile fault detection, and in particular relates to a data code communication method, a device, a fault diagnostic instrument and a combined instrument. Background technique [0002] In the prior art, when performing fault diagnosis on a vehicle-mounted combination meter, data code communication between the diagnostic instrument and the combination meter is required. But the environment in which cars work is quite harsh. Severe vibration, temperature and humidity changes caused by climate or weather changes, especially strong electromagnetic interference caused by engine spark plugs and distributors, etc. Therefore, the serial digital communication running on the automotive platform is more demanding than running in other working environments. In the self-diagnosis communication process, a high fault-tolerant function is required to avoid unnecessary negative effects on fault diagnosis and status m...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
CPCH04L1/0056H04L1/0061
Inventor 侯影韩微微
Owner BEIJING ELECTRIC VEHICLE
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