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Vehicle communication system

An in-vehicle communication system and communicator technology, applied in general control systems, control/regulation systems, testing/monitoring control systems, etc., can solve problems such as reduced charging efficiency and increased power consumption

Active Publication Date: 2021-02-19
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a possibility that the power consumption of the entire vehicle increases and the charging efficiency of the vehicle decreases.

Method used

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no. 1 approach

[0017] Hereinafter, a first embodiment of the in-vehicle communication system will be described with reference to the drawings.

[0018] Such as figure 1 As shown, the in-vehicle communication system includes: a gateway device 400, which is installed in the vehicle and has a gateway function; a plurality of communication buses NW1-NW3 connected to the gateway device 400; ECUs (electronic control units) connected to these communication buses NW1-NW3 100 and DCM (Data Communication Module) 300 . The ECU and the DCM may be configured to include 1) one or more processors operating according to a computer program (software); 2) one or more dedicated hardware circuits such as ASIC; or 3) a circuit (circuitry) combining them. The processor includes a memory such as a CPU, RAM, and ROM, and the memory stores program codes or instructions configured to cause the CPU to execute processing. Memory or computer-readable media includes all available media that can be accessed by a general...

no. 2 approach

[0038] Next, a second embodiment of the in-vehicle communication system will be described with reference to the drawings. In addition, the second embodiment differs from the first embodiment in that, in addition to setting the routing destination of the communication message in the routing table managed by the gateway device, the routing of the communication message on the communication bus is also set. interval. The routing interval of a communication message means the time interval at which the communication message is routed. Therefore, in the following description, the configurations different from those of the first embodiment will be mainly described, and repeated descriptions of configurations that are the same as or similar to those of the first embodiment will be omitted.

[0039] Such as Figure 5 As shown, in the second embodiment, in the first routing table T1, the second communication bus NW2 and the third communication bus NW3 are set as routing destinations re...

no. 3 approach

[0046] Next, a third embodiment of the in-vehicle communication system will be described with reference to the drawings. In addition, the third embodiment is different from the first embodiment in that, in addition to setting the routing destinations of communication messages in the routing table managed by the gateway device, the routing table to be routed between communication buses is also set together. The number of data (specifically, the number of data frames). Therefore, in the following description, configurations different from those of the first embodiment will be mainly described, and redundant descriptions of configurations that are the same as or similar to those of the first embodiment will be omitted.

[0047] Such as Figure 7 As shown, in the third embodiment, in the first routing table T1, the second communication bus NW2 and the third communication bus NW3 are set as routing destinations related to the vehicle charging information from the first communicati...

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Abstract

The in-vehicle communication system of the present invention includes: a gateway for routing relay vehicle information; a first ECU connected to the gateway via a first communication bus; a second ECU connected to the gateway via a second communication bus; Vehicle communicator connected by bus to gateway. The gateway has: a first routing table specifying routing actions performed while the vehicle is running; and a second routing table specifying routing actions performed during charging of the vehicle by the external charging device, the second routing table being set as: Vehicle charging information sent by the first ECU is routed from the first communication bus towards the second communication bus less frequently than the first routing table.

Description

technical field [0001] The present invention relates to an in-vehicle communication system that transmits vehicle charging information indicating the state of charge of an on-vehicle battery to the outside of the vehicle when the vehicle is being charged by an external charging device. Background technique [0002] There is known an in-vehicle communication system in which, for example, whether the vehicle is being charged while being connected to an external charging device, or whether the charging of the vehicle using the external charging device is completed, etc., when the vehicle is charged by the external charging device, Vehicle charging information indicating the state of charge of an on-vehicle battery is communicated between a plurality of ECUs mounted on the vehicle (for example, refer to Japanese Patent Application Laid-Open No. 2009-292333). [0003] In recent years, when charging a vehicle by an external charging device, it has been studied to centralize vehicl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/28
CPCG05B23/0213G05B2219/24065
Inventor 秦裕文
Owner TOYOTA JIDOSHA KK
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