Hybrid electric vehicle network communication system with two CAN (Controller Area Network) buses

Abstract

The invention discloses a hybrid electric vehicle network communication system with two CAN buses. The hybrid electric vehicle network communication system with the two CAN buses comprises a network integrated with a high speed CAN bus and a low speed CAN bus simultaneously and supports network communications of hybrid electric vehicles of different vehicle models such as motor buses and SUVs (sport-utility vehicles). One of the two CAN buses is needed by a traditional vehicle and composed of standard frame 11-bit ID (IDentity) network segments, and the other CAN bus is needed by a hybrid electric vehicle and composed of extended frame 29-bit ID network segments; the information interaction of the 11-bit ID network segments and the 29-bit ID network segments is achieved through a VCU (vehicle control unit) of an integration gateway; a signal of the 11-bit ID network segments comprises an air-condition controller message, a motor compressor message and a vehicle control unit 11-bit ID message; and a signal of the 29-bit ID network segments comprises a battery management controller message, a vehicle control unit 29-bit ID message, a generator controller message and a driving motor controller message. The hybrid electric vehicle network communication system with the two CAN buses achieves the simultaneous integration of the high speed CAN bus and the low speed CAN bus and supports the network communications of the hybrid electric vehicles of different vehicle models such as motor buses and SUVs.

Description

technical field [0001] The invention relates to a network communication system for vehicles, in particular to a network communication system for hybrid vehicles. Background technique [0002] Compared with traditional cars, hybrid electric vehicles (Hybrid Electric Vehicle, HEV) have a large number of high-voltage components, such as high-voltage power batteries, motors, DC / DC and other equipment, so it will cause serious interference to its own weak current equipment, so it is required Various control signals have strong anti-interference ability during transmission. At the same time, since the powertrain of a hybrid electric vehicle includes not only an engine system, but also an electric drive system and a battery management system, its powertrain control system is very complicated. The massive increase of control nodes makes the control devices of the HEV power system need to exchange more information, and the power system control itself also requires high real-time per...

AI Technical Summary

Problems solved by technology

At present, there is no hybrid vehicle that can realize the integration of high-speed CAN and low-speed CAN

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