CN201833973U - CAN (Controller Area Network) topological structure - Google Patents

CAN (Controller Area Network) topological structure Download PDF

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Publication number
CN201833973U
CN201833973U CN2010205425382U CN201020542538U CN201833973U CN 201833973 U CN201833973 U CN 201833973U CN 2010205425382 U CN2010205425382 U CN 2010205425382U CN 201020542538 U CN201020542538 U CN 201020542538U CN 201833973 U CN201833973 U CN 201833973U
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China
Prior art keywords
bus
net
gateway
hvn
startup
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CN2010205425382U
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Chinese (zh)
Inventor
许锋
贺玉姣
张建
宋豪杰
张超
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比亚迪股份有限公司
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Priority to CN2010205425382U priority Critical patent/CN201833973U/en
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Publication of CN201833973U publication Critical patent/CN201833973U/en

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Abstract

A CAN (Controller Area Network) topological structure comprises a high-velocity network and a low-velocity network which conduct CAN communication through a gateway. The CAN topological structure further comprises a start-up network connected with the gateway, wherein the start-up network is connected with the high-velocity network and the low-velocity network respectively for CAN communication through the gateway, and comprises a vehicle body control module, an intelligent key system controller, and a steering wheel lock controller which are connected to the start-up network CAN respectively. The vehicle body control module, the intelligent key system controller and the steering wheel lock controller, which are relative to vehicle burglary prevention, vehicle power on and vehicle start, are connected to the start-up network CAN; and as the start-up network and the low-velocity network are independent with each other, the start-up network can also work normally even if the low-velocity network paralyses, and the failure rate of vehicle burglary prevention, vehicle power on and vehicle start is effectively reduced.

Description

A kind of CAN bus topolopy

Technical field

The utility model relates to a kind of CAN bus topolopy.

Background technology

Along with the develop rapidly of science and technology, the electronics package on the automobile is more and more, get in touch also more and more closer, from the engine control to the drivelinecontrol, from travel, braking, steering system control to safety assurance system and instrument warning.Now a lot of automobiles employing CAN(Controller Area Network) bus connects them, but each control unit to system response time require different, some unit requires very high to real-time, if can not get the timely response of actr after instruction is sent, just may cause serious consequence even car crash, as ABS/ASR/ESP unit, safety air bag etc.And some unit such as control of illumination, air-conditioning control etc. are just relatively low to the requirement of response time.

Therefore, in order to overcome the above problems, CAN bus topolopy has as shown in Figure 1 appearred in the prior art, this CAN bus topolopy comprises HVN and the low speed net that carries out CAN communication by gateway, and HVN connects the unit higher to response time requirement such as power control system and braking control system; The low speed net connects vehicular electrical appliances such as air-conditioning, promptly lower to response time requirement unit.

Car load is antitheft, car load powers on, car load starts is several key functions of automobile, and the CAN bus is to finish the key of these three functions.The electronic unit relevant with above-mentioned three functions is the BCM(Body control module), I-Key(intelligent key system controller), ECL(handle lock controller), the ECM/TCU(power control system).As shown in Figure 1, it is online that BCM, I-Key, ECL are connected low speed, and ECM/TCU is connected on the HVN.Carry out car load antitheft, when car load powers on function, utilize the CAN bus to communicate between BCM, I-Key, the ECL; When carrying out car load startup function, utilize gateway and CAN bus to communicate between BCM and the ECM/TCU.The online bonded assembly electronic unit of low speed is a lot, and each electronic unit adopts connection mode in parallel, when the CAN interface of any one electronic unit goes wrong under this connection mode, all may cause the paralysis of low speed net.At this moment, car load is antitheft, car load powers on, car load starts disabler, and gateway occurs also can causing above three disablers when unusual, so that car load is antitheft, car load powers on, car load starts the probability that goes wrong is higher.

Summary of the invention

The utility model car load when solve adopting existing C AN bus topolopy is antitheft, car load powers on and car load starts inefficacy probability technical problems of high, provides a kind of and reduces that car load is antitheft, car load powers on and car load starts the CAN bus topolopy of inefficacy probability.

A kind of CAN bus topolopy, comprise the HVN and the low speed net that carry out CAN communication by gateway, wherein, described CAN bus topolopy also comprises and gateway bonded assembly startup net, described startup Netcom crosses gateway and carries out CAN with low speed net and HVN respectively and communicate by letter, and described startup net comprises and is connected respectively to Body control module, intelligent key system controller and the handle lock controller that starts net CAN bus.

Further, described low speed network speed rate is 125Kb/s.

Described low speed net comprises respectively and seat headrest unit, a low speed net CAN bus bonded assembly left side, right seat headrest unit, head light controller, combination instrument unit, Reverse Sensor unit, combined switch unit, DVD multimedia system, supplemental restraint system, air-conditioning unit, multi-functional screen unit, in-car TV, vehicle window controller and relay control module.

The speed of described HVN is 500 Kb/s.

Described HVN comprises respectively and HVN CAN bus bonded assembly anti-skid brake system, Automatic Transmission control unit, body electronics stabilization system and power control system.

The speed of described startup net is 125 Kb/s.

Described startup net CAN bus comprises that two differential received send line CAN_L and CAN_H, are in series with 120 ohm bus matched resistance respectively between the end points of CAN_L and CAN_H.

Described gateway comprises the CAN interface of two 125 Kb/s and the CAN interface of a 500Kb/s, described gateway is netted the total wire joint of CAN with low speed net CAN bus and startup respectively by the CAN interface of two 125 Kb/s, and described gateway is by CAN interface and the total wire joint of HVN CAN of 500Kb/s.

CAN bus topolopy of the present utility model, by will be antitheft with car load, car load powers on and car load starts relevant Body control module, intelligent key system controller and handle lock controller and is connected to start and nets on the CAN bus, because it is independent separately to start net and low speed net, even low speed net paralysis this moment, starting net also can normal operation, so effectively reduce the inefficacy probability that car load is antitheft, car load powers on and car load starts.

Description of drawings

Fig. 1 is the scheme drawing of the CAN bus topolopy that provides of prior art;

Fig. 2 is the scheme drawing of a kind of CAN bus topolopy of providing of the utility model embodiment;

Fig. 3 be utilize Fig. 2 the CAN bus topolopy withdraw from the theft-proof schematic flow sheet of car load;

Fig. 4 is the schematic flow sheet that utilizes the car load of the CAN bus topolopy of Fig. 2 to power on;

Fig. 5 is the schematic flow sheet that utilizes the car load of the CAN bus topolopy of Fig. 2 to start.

English abbreviation among the figure is as follows:

ABS: anti-skid brake system; TCU: Automatic Transmission control unit; ESP: body electronics stabilization system; ECM: power control system; BCM: Body control module; ECL: handle lock controller; I-key: intelligent key system controller; ALS: head light controller; SRS: supplemental restraint system; DMCU: vehicle window controller; TV: in-car TV.

The specific embodiment

Clearer for technical matters, technical scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

According to a kind of embodiment of the present utility model, as shown in Figure 2, a kind of CAN bus topolopy, comprise the HVN and the low speed net that carry out CAN communication by gateway, wherein, this CAN bus topolopy also comprises and the gateway bonded assembly starts net, starts Netcom and crosses gateway and carry out CAN with low speed net and HVN respectively and communicate by letter, and starts net and comprises and be connected respectively to Body control module BCM, intelligent key system controller I-key and the handle lock controller ECL that starts net CAN bus.

Further, low speed network speed rate is 125Kb/s.Certainly the speed of low speed net can also be other low speed transmissions speed, as being 50 Kb/s.

Wherein, the low speed net comprises respectively and seat headrest unit, a low speed net CAN bus bonded assembly left side, right seat headrest unit, head light controller ALS, combination instrument unit, Reverse Sensor unit, combined switch unit, DVD multimedia system, supplemental restraint system SRS, air-conditioning unit, multi-functional screen unit, in-car TV TV, vehicle window controller DMCU and relay control module.

Low speed net CAN bus mainly connects the unit lower to response time requirement, and those skilled in the art can rationally be provided with the unit that is connected to low speed net CAN bus as required.

Further, the speed of HVN is 500 Kb/s.Certainly the speed of HVN can also be other high-speed transfer speed, as being 750 Kb/s.

Wherein, HVN comprises respectively and HVN CAN bus bonded assembly anti-skid brake system ABS, Automatic Transmission control unit TCU, body electronics stabilization system ESP and power control system ECM.

HVN CAN bus mainly connects the unit higher to response time requirement, and those skilled in the art can rationally be provided with the unit that is connected to HVN CAN bus as required.

Further, starting the speed of netting is 125 Kb/s.Certainly the speed that starts net can also be other proper speed, and those skilled in the art can make reasonable setting as required.

Further, start net CAN bus and comprise that two differential received send line CAN_L and CAN_H, are in series with 120 ohm bus matched resistance respectively between the end points of CAN_L and CAN_H.The effect of these two resistance is to increase the stability of CAN bus transfer and antijamming capability, reduces the error rate in the data transmission.

Similarly, HVN CAN bus can comprise that also two differential received send line CAN_L and CAN_H, are in series with 120 ohm bus matched resistance respectively between the end points of CAN_L and CAN_H.

Further, gateway comprises the CAN interface of two 125 Kb/s and the CAN interface of a 500Kb/s, gateway is netted the total wire joint of CAN with low speed net CAN bus and startup respectively by the CAN interface of two 125 Kb/s, and this gateway is by CAN interface and the total wire joint of HVN CAN of 500Kb/s.

Utilize the vehicle starting method of CAN bus topolopy, this CAN bus topolopy comprises HVN, low speed net and the startup net that carries out CAN communication by gateway, HVN comprises the power control system that is connected to HVN CAN bus, start net and comprise Body control module BCM, intelligent key system controller I-key and the handle lock controller ECL that is connected respectively to startup net CAN bus, Body control module BCM also with the total wire joint of HVN CAN, wherein, this vehicle starting method may further comprise the steps:

Whether 1) Body control module BCM gathers the vehicle launch signal;

2) if Body control module BCM collects the vehicle launch signal, Body control module BCM utilizes startup net CAN bus will seek card command and sends to intelligent key system controller I-key;

3) intelligent key system controller I-key utilize to start net CAN bus to Body control module BCM feedback intelligent key card whether in car;

4) Body control module BCM receives after Intelligent key is stuck in signal in the car, and the dynamic start order is sent to power control system ECM by starting net CAN bus, gateway and HVN CAN bus successively;

5) if receiving the response message of power control system ECM in the time that limits, Body control module BCM just controls power control system ECM startup vehicle.

Wherein dynamic start is meant the startup of vehicle propulsions source such as engine starting or electric motor starting.Those skilled in the art can rationally be provided with as required and be connected to HVN and the online unit of low speed, realize the startup of vehicle according to the difference of vehicle power source.

When vehicle is in anti-theft state, this vehicle starting method also comprised before step 1) and withdraws from the antitheft step of car load, this withdraws from the antitheft step of car load and comprises: if intelligent key system controller I-key receives the button of the remote-control unlocking of Intelligent key card or grip handle by issuing orders, then send to Body control module BCM by starting net CAN bus, Body control module BCM control door lock is unblanked, and car load withdraws from anti-theft state.

Correspondingly, vehicle can also utilize this topological structure to realize that car load is antitheft: if intelligent key system controller I-key receives the button of romote controlled locking or grip handle button by issuing orders, then send to Body control module BCM by starting net CAN bus, Body control module BCM control door lock is realized locking; Body control module BCM utilizes startup net CAN bus that bearing circle locking order is sent to handle lock controller ECL control handle lock and realizes locking simultaneously, and car load enters anti-theft state.

Those skilled in the art can also be provided with the car load step that powers on withdrawing from as required between antitheft step of car load and the step 1): if Body control module BCM collects the car load order that powers on, then will seek card command and send to intelligent key system controller I-key by startup net CAN bus, intelligent key system controller I-key orders in car to Body control module BCM feedback card by starting net CAN bus, Body control module BCM sends to the release of handle lock controller ECL control handle lock by starting net CAN bus with the bearing circle unlock command, and Body control module BCM control car load powers on.

According to a kind of embodiment of the present utility model, as shown in Figure 3, it is as follows to withdraw from the theft-proof flow process of car load: after intelligent key system controller I-key receives " remote-control unlocking " or " button is pressed " of the grip handle button instruction (when vehicle is in anti-theft state) of electron key, utilize startup net CAN bus that this information is sent to Body control module BCM, Body control module BCM control door lock is unblanked, and car load withdraws from anti-theft state.

Correspondingly, the theft-proof flow process (not shown) of car load is as follows:

Be in when withdrawing from anti-theft state at vehicle, after intelligent key system controller I-key receives " romote controlled locking " or " button is pressed " of grip handle button instruction of electron key, utilize startup net CAN bus this information to be sent to Body control module BCM, Body control module BCM control gate locking lock; And Body control module BCM utilizes startup net CAN bus that " handle lock locking order " sent to handle lock controller ECL control handle lock and realizes locking, and car load enters anti-theft state.

According to a kind of embodiment of the present utility model, as shown in Figure 4, the flow process that car load powers on is as follows:

After Body control module BCM collects the switch order that car load powers on, utilize startup net CAN bus " to seek card command " and send to intelligent key system controller I-key, intelligent key system controller I-key utilizes startup net CAN bus " to be stuck in the car " or the message feedback of " card is not in car " is given Body control module BCM, after Body control module BCM receives " being stuck in the car ", Body control module BCM utilizes startup net CAN bus that " handle lock unlock command " sent to handle lock controller ECL control handle lock and realizes release, and the control car load powers on.

Wherein, electron key is the Intelligent key card, there is password Intelligent key card inside, seeks card and is intelligent key system controller I-key and receives information that the Intelligent key card sends and carry out rightly, has only the chaufeur band the Intelligent key card and just has car load into the car and power on and start.

Car load powers on and can comprise the control of one grade of electricity (ACC) and second gear electricity (ON shelves), and those skilled in the art can rationally control car load as required and power on.

According to a kind of embodiment of the present utility model, as shown in Figure 5, the flow process that car load starts is as follows:

Withdraw from the car load anti-theft state if current vehicle is in anti-theft state earlier, and then can control and realize that car load powers on.After Body control module BCM collects the switch order of car load startup afterwards, utilize startup net CAN bus " to seek card command " and send to intelligent key system controller I-key, the message feedback that intelligent key system controller I-key utilizes startup net CAN bus " to be stuck in the car " is given Body control module BCM, after Body control module BCM receives the information of " being stuck in the car ", Body control module BCM utilizes the CAN interface of 125kb/s that " engine starting order " sent and is given to the startup net, arrive HVN by gateway forwards, power control system ECM sends response message to HVN after receiving this information in 500ms, gateway is forwarded to the startup net with this response message again, Body control module BCM receives the response message of power control system ECM in the time that limits, just control engine starting.

Wherein, if do not have car load startup command or Intelligent key card not in car, vehicle all is failure to actuate, corresponding end of program.

CAN bus topolopy of the present utility model, by will be antitheft with car load, car load powers on starts relevant Body control module BCM, intelligent key system controller I-key and handle lock controller ECL with car load and be connected to start and net on the CAN bus, because it is independent separately to start net and low speed net, even low speed net paralysis this moment, starting net also can normal operation, so effectively reduce the inefficacy probability that car load is antitheft, car load powers on and car load starts.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims (8)

1. CAN bus topolopy, comprise the HVN and the low speed net that carry out CAN communication by gateway, it is characterized in that, described CAN bus topolopy also comprises and gateway bonded assembly startup net, described startup Netcom crosses gateway and carries out CAN with low speed net and HVN respectively and communicate by letter, and described startup net comprises and is connected respectively to Body control module, intelligent key system controller and the handle lock controller that starts net CAN bus.
2. CAN bus topolopy as claimed in claim 1 is characterized in that, described low speed network speed rate is 125Kb/s.
3. CAN bus topolopy as claimed in claim 1, it is characterized in that described low speed net comprises respectively and seat headrest unit, a low speed net CAN bus bonded assembly left side, right seat headrest unit, head light controller, combination instrument unit, Reverse Sensor unit, combined switch unit, DVD multimedia system, supplemental restraint system, air-conditioning unit, multi-functional screen unit, in-car TV, vehicle window controller and relay control module.
4. CAN bus topolopy as claimed in claim 1 is characterized in that, the speed of described HVN is 500 Kb/s.
5. CAN bus topolopy as claimed in claim 1 is characterized in that, described HVN comprises respectively and HVN CAN bus bonded assembly anti-skid brake system, Automatic Transmission control unit, body electronics stabilization system and power control system.
6. CAN bus topolopy as claimed in claim 1 is characterized in that, the speed of described startup net is 125 Kb/s.
7. CAN bus topolopy as claimed in claim 1 is characterized in that, described startup net CAN bus comprises that two differential received send line CAN_L and CAN_H, are in series with 120 ohm bus matched resistance respectively between the end points of CAN_L and CAN_H.
8. CAN bus topolopy as claimed in claim 1, it is characterized in that, described gateway comprises the CAN interface of two 125 Kb/s and the CAN interface of a 500Kb/s, described gateway is netted the total wire joint of CAN with low speed net CAN bus and startup respectively by the CAN interface of two 125 Kb/s, and described gateway is by CAN interface and the total wire joint of HVN CAN of 500Kb/s.
CN2010205425382U 2010-09-27 2010-09-27 CAN (Controller Area Network) topological structure CN201833973U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102935831A (en) * 2012-10-18 2013-02-20 上海迈拓汽车技术有限公司 Automobile CAN (controller area network) network control system
CN103158648A (en) * 2011-12-19 2013-06-19 北汽福田汽车股份有限公司 Vehicle-mounted local area network (LAN) structure for car and car with the same
CN103676816A (en) * 2012-09-17 2014-03-26 现代自动车株式会社 System and method for controlling an integrated network of a vehicle
CN104118372A (en) * 2013-04-24 2014-10-29 广州汽车集团股份有限公司 Hybrid electric vehicle CAN network system
CN104852947A (en) * 2014-03-18 2015-08-19 北汽福田汽车股份有限公司 CAN network topology structure of vehicle and vehicle using same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103158648A (en) * 2011-12-19 2013-06-19 北汽福田汽车股份有限公司 Vehicle-mounted local area network (LAN) structure for car and car with the same
CN103676816B (en) * 2012-09-17 2017-12-15 现代自动车株式会社 For the system and method for the integrated network for controlling vehicle
CN103676816A (en) * 2012-09-17 2014-03-26 现代自动车株式会社 System and method for controlling an integrated network of a vehicle
CN102935831B (en) * 2012-10-18 2016-06-08 上海迈拓汽车技术有限公司 A kind of automotive CAN network control system
CN102935831A (en) * 2012-10-18 2013-02-20 上海迈拓汽车技术有限公司 Automobile CAN (controller area network) network control system
CN104118372A (en) * 2013-04-24 2014-10-29 广州汽车集团股份有限公司 Hybrid electric vehicle CAN network system
CN104852947A (en) * 2014-03-18 2015-08-19 北汽福田汽车股份有限公司 CAN network topology structure of vehicle and vehicle using same

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