CN201153265Y

CN201153265Y - Vehicle mounted network

Info

Publication number: CN201153265Y
Application number: CNU2007201964777U
Authority: CN
Inventors: 任海东; 王飞; 王平; 李武斌; 周定华
Original assignee: SAIC Chery Automobile Co Ltd
Current assignee: SAIC Chery Automobile Co Ltd
Priority date: 2007-12-27
Filing date: 2007-12-27
Publication date: 2008-11-19
Anticipated expiration: 2017-12-27

Abstract

The utility model discloses a vehicle network, comprising a CAN network and an LIN network, which are coupled by a gateway. The vehicle network realizes resource optimization and sharing and improves the real-time property of the system. The proposal enables two buses to realize complementary advantages by the combination of two buses of CAN and LIN; the network is divided into three networks which are relatively independently controlled by introducing the gateway, thereby enhancing the reliability and the real-time property of communications among each system, simultaneously saving resources and cost, and also providing great convenience to expanding and changing the functions of the whole vehicle.

Description

A kind of In-vehicle networking

Technical field

The utility model relates to vehicle communication system, particularly a kind of vehicle netbios.

Background technology

In traditional In-vehicle networking, communication modes is more single, realizes that the network channel of information sharing is also limited.Comprise that fuel system ECU, drive system ECU in the automobile, bodywork system ECU, ABS control ECU, ASR control ECU, cruise system ECU, air-conditioning control ECU etc. communicate by a local area network (LAN).And in fact, each system is different to the rate requirement of information communication in car load, the rate requirement of wherein safe power chassis system is than higher, and it is comfortable lower with the rate requirement Body Control aspect, the network topology structure of traditional single-rate has been wasted the communication resource, and expand comparatively complexity, and cause the instability of network conflict and system easily.

Existing automobile has the city page Local Interconnect Network network (LIN) of control system local area network (LAN) (CAN) and CAN etc. with the Local Area Network standard, wherein CAN bus (CANBUS) is the express network bus, and LIN general line (LINBUS) is a slow network.

Summary of the invention

The purpose of this utility model provides a kind of In-vehicle networking, this In-vehicle networking adopts the optimization of gateway technique realization resource and shares, network service divides different system requirements to use different bus types to car load, and separate many network channels, can realize the communication of different rates, having overcome above-mentioned single net has wasted the communication resource, and expands comparatively complexity, and causes the unsettled scarce filling of network conflict and system easily.

For addressing the above problem the technical solution of the utility model be: a kind of In-vehicle networking, comprise CAN network and LIN network, wherein CAN network and LIN network connect by gateway.

The utility model adopts gateway technique in one network integrated CAN bus and LIN bus, is different from traditional single unidirectional communication road communication system, is a kind of automobile bus communication network system of brand-new comprehensive exploitation.The utility model is realized the optimization of resource and is shared, improves the real-time of system.

This structure adopts subnetting control, the rate requirement higher system with require low system's branch in different two kinds of network C AN and LIN, carry out information exchange by gateway, information in the different rates network is shared, made full use of the high efficiency of CAN bus and LIN bus and characteristics cheaply.But the advantage of this scheme be exactly on the network information transmitted amount big, and make things convenient for the function expansion of system, thereby avoided the sharable amount of information of traditional single network and single channel network few, the shortcoming that extensibility is low.

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Description of drawings

Fig. 1 is the utility model In-vehicle networking embodiment topology diagram.

Embodiment

As shown in Figure 1, have 18 systems in this programme topological structure and participate in bus communication, wherein the high-speed CAN network has 12 nodes, the LI N network of low speed is divided into LI N1 and two subnets of LI N2, have 6 joints, also have the gateway BCM (car body controller) of 1 CAN network and LI N1 network, LI N2 network, specifically describe as follows:

Article three, network channel is respectively: the high-speed CAN network channel: speed is 500kbit/s, mainly by power, chassis portion, Body Control, resist stubbornly control and instrument display system form; Main node has: engine control system, steering angle module, hard-top control system, electronics parking system, braking system, air-conditioning, gearbox, tire pressure system, air bag, steering, instrument and car body controller.Article two, LIN network channel, speed is 9.6kbit/s, wherein the main node of article one LIN network has rain sensor, supporting instrument and anti-theft loudspeaker, and the main node of second LIN network has left front door glass lifting module, right front door glass lifting module, ultrasonic wave supervisory control device and car body controller.The gateway of CAN and LI N bus is integrated among the car body controller BCM.Each network channel is just by the exchanges data between gateway realization heterogeneous networks.

Gateway is the interface of the conversion of signals of CAN network and LIN network, is integrated in the front of the car controller, and the information exchange that CAN, LIN1 and LIN2 need communicate with one another is come out, and information exchange is divided into two aspects:

(1): the conversion of signals tabulation from CAN to LIN

Annotate: the outer warm signal of signal External Tempera ture is dealt into the LIN network switch and becomes warm signal outside the Vehicle BakeupSpeed vehicle speed signal of Window command glass lifting order correspondence and the Externa lTemperature in sending signal Vehicle Speed vehicle speed signal in the frame ICM_1 and air-conditioning sends frame CLM_1 by the node combination instrument after host node receives.

(2): the conversion of signals tabulation from LIN to CAN

Annotate: S_RAIN rainfall detecting signal and S_RSFAULT malfunction detection signal in the AUTOWIPE automatic wiper order that rain sensor sends are dealt into the CAN network switch and become corresponding RainDelected rainfall detecting signal and RainSensorFailSts malfunction detection signal after receiving through host node.

In the LIN network system, two LIN networks shared gateway, i.e. car body controllers.Car body controller connects rain sensor, supporting instrument and anti-theft loudspeaker as a network, connect Qianmen, left and right sides glass lifting module and ultrasonic wave supervisory control device and constitute another network, separately two networks help the real-time of communication and the conflict that reduces network.

Present embodiment is by the combination of two kinds of bus CAN and LIN, make that two kinds of buses can realize having complementary advantages, by introducing the network that gateway has been divided into network three relatively independent controls, the reliability and the real-time of communication between each system have been strengthened, saved resource and cost simultaneously, all provided great convenience also for the expansion of whole vehicle functions and change.

There is following advantage in the network topology of present embodiment:

(1) adopt the network type topological structure, transmission signals is realized digitlization;

(2) adopted the network-bus system of CAN and LIN combination, more effectively and fully utilized resource, provided cost savings.

(3) adopted three network channels,, reasonably distributed network channel, the load factor of network has been controlled in the reasonable range, strengthened the real-time of network communication at each different communication system characteristics.

(4) at different network channels, adopted the technology of webmaster, when realizing information sharing, whole network is carried out the global network management, increased the reliability of network.

(5) introduce the optimization that gateway can more help the car load topology network, can there be more rational distribution in each system in network.

Claims

1, a kind of In-vehicle networking comprises CAN network and LIN network, it is characterized in that: CAN network and LIN network connect by gateway.

2, a kind of In-vehicle networking according to claim 1 is characterized in that: described gateway is a car body controller.

3, a kind of In-vehicle networking according to claim 2 is characterized in that: described LIN network comprises LIN1 network and LIN2 network, connects by gateway between each network channel.

4, a kind of In-vehicle networking according to claim 3 is characterized in that: the Bus Speed of described LIN1 network and LIN2 network is 9.6kbit/s.

5, a kind of In-vehicle networking according to claim 3 is characterized in that: the node on the described LIN1 network comprises rain sensor, supporting instrument, anti-theft loudspeaker and car body controller.

6, a kind of In-vehicle networking according to claim 3 is characterized in that: the node on the described LIN1 network comprises left front door glass lifting module, right front door glass lifting module and car body controller.

7, a kind of In-vehicle networking according to claim 1 and 2 is characterized in that: the Bus Speed of described CAN network is 500kbit/s.

8, a kind of In-vehicle networking according to claim 7 is characterized in that: the node on the described CAN network comprises engine control system, steering angle module, hard-top control system, electronics parking system, braking system, air-conditioning, gearbox, tire pressure system, air bag, steering, instrument and car body controller.