Automobile complete vehicle electronic appliance CANBUS network control method

Abstract

The invention provides a novel CANBUS network control method for integrated automotive electronic device CANBUS network, and relates to an integrated automotive network topology structure, a network management policy, network management and ID allocation. The system comprises a high-speed CAN bus and a plurality of CAN nodes electric control unit connected with the CAN bus, and is characterized in that the insides of the CAN node electric control units at utmost two ends of the high-speed CAN bus are connected with two serially-connected terminal resistors respectively; the system controls the initialized time and temporary time leaving the bus of each CAN node control unit; nodes are divided into main nodes, +30 nodes and +15 nodes; when +15 wires are not electrified, CANS of all +15 nodes do not work; when the +15 wires are electrified, all the +15 nodes are waken up; and under the condition that the +30 wires are electrified and the +15 wires are not electrified, the main nodes can wake up a CAN bus of +30 nodes. In the invention, an automotive network topology graph has strong expandability and flexibility, so as to meet the diversity of the same series automobile type configuration; and a network managing mode ensures the reduced integrated automobile static current and the real-time and order of the integrated automotive network. The ID allocation mode makes the utilization rate of the network maximized, and guarantees the high efficiency and the real-time of transmission information, and reduces the network load factor.

Description

technical field [0001] The invention relates to the field of automotive electronic control. Background technique [0002] In recent years, with the increasingly stringent emission standards, safety standards and users' pursuit of car safety, comfort and luxury, the number of ECU control units is increasing, and the increase of ECU will inevitably lead to the increase of wiring harnesses and the reliable realization of ECU functions. Sex and many other problems, in order to solve this series of imminent problems, in the late 1980s, the German BOSCH company proposed to design a single network bus, all peripheral devices can be connected to the bus, so, CAN bus was born. In 1993, the CAN bus was formulated as an ISO international standard, and this is the only bus with an ISO international standard so far. With its high data security and relatively low cost, the CAN bus is quickly favored by the majority of automobile manufacturers and consumers. There is no doubt that the CA...

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Problems solved by technology

So far in China, there is no CAN BUS system of a car model developed and designed by domestic companies.

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