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A method and system for transmitting obd data of a vehicle engine

A transmission method and data transmission request technology, which is applied in the field of vehicle engine OBD data transmission, can solve problems such as the inability to transmit OBD data of the engine ECU, and achieve the effects of reducing system interference reminders, reducing workload, and reducing load

Active Publication Date: 2020-11-24
亚美智联数据科技有限公司
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Problems solved by technology

[0004] The present invention provides a method for transmitting vehicle engine OBD data in order to solve the defect that the OBD data of the engine ECU cannot be transmitted due to different ECUs using different protocols in the prior art.

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  • A method and system for transmitting obd data of a vehicle engine

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Embodiment 1

[0022] Such as figure 1 As shown, the method mentioned in the present invention involves the following components: data application module, protocol identification control module, protocol driver module, signal conversion circuit, vehicle OBD port and vehicle ECU.

[0023] Among them, the data application module, the protocol identification control module, and the protocol driver module are integrated in the MCU, and form a bus module together with the signal conversion circuit.

[0024] On the above basis, the method provided by the present invention includes the following steps:

[0025] S1. After the vehicle is started, the data application module initiates a data transmission request to the protocol identification control module;

[0026] S2. After the protocol identification control module receives the data transmission request, it enables the broadcast mode, searches for the protocols used by the ECU in the vehicle in order; then transmits the searched protocol type to ...

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Abstract

The present invention provides a transmission method of OBD data of a vehicle engine for solving the technical problem that the OBD data of the engine ECU cannot be transmitted because of the different protocols used by different ECU.

Description

technical field [0001] The present invention relates to the field of vehicle OBD data transmission, and more specifically, to a transmission method and system for vehicle engine OBD data. Background technique [0002] At present, when transmitting OBD data, it is generally transmitted through the ELM327 method. This method retrieves several protocols that are commonly used in the current market in sequence, and then globally broadcasts the request. Whichever protocol the vehicle responds to, the protocol will be used by default to communicate and transmit OBD data. Then decode according to ISO15031-5. [0003] This method can be used normally in most vehicles, but due to the replacement of some vehicles, dozens of ECUs inside may use multiple protocols. For example, the engine ECU uses the CAN protocol, while the rest of the ECUs use the K Line protocol, if a sequence of J1850->K->CAN is used to retrieve these protocols, then the data transmission protocol of the vehi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L29/08
CPCH04L67/12H04L69/08
Inventor 温煦黎尧文
Owner 亚美智联数据科技有限公司
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