CN212473351U - CAN bus arrangement structure based on electric light truck - Google Patents

Abstract

The utility model discloses a CAN bus arrangement structure based on electronic light truck belongs to light truck CAN bus system field, and CAN bus arrangement structure based on electronic light truck includes two way CAN buses, and every way CAN bus comprises a plurality of controller nodes, shielding paired line CAN _ H and CAN _ L and terminal resistance. The utility model discloses a CAN bus arrangement structure based on electronic light truck adopts each controller module of CAN bus connection to reduce the redundancy of pencil, the complicacy of arranging, reduced the complexity of pencil and the cost of pencil, promoted the whole space of arranging of car.

Description

CAN bus arrangement structure based on electric light truck

Technical Field

The utility model relates to a light truck CAN bus system field especially relates to a CAN bus arrangement structure based on electronic light truck.

Background

Nowadays, the development of automotive electronic technology is faster and faster, so that more and more electronic devices are mounted on an automobile, and the overall arrangement space of the automobile is reduced.

The CAN bus is a Samsung data communication protocol and CAN work in various modes, any node on the network CAN actively send messages to other nodes (controller ECU) on the network at any time, and the communication modes are flexible without master-slave; in addition, the CAN bus CAN receive data in a broadcast form point-to-point, point-to-multipoint.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to solve the technical problem that a CAN bus arrangement structure based on electronic light truck is proposed, adopts each controller module of CAN bus connection to reduce the redundancy of pencil, the complicacy of arranging, reduced the complexity of pencil and the cost of pencil, promoted the whole space of arranging of car.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a pair of CAN bus arrangement structure based on electronic light truck, including two way CAN buses, two the CAN bus is power bus PCAN and automobile body bus BCAN respectively, the node that contains on the power bus PCAN has motor controller MCU, battery management system BMS, on-vehicle trinity module DCDC, DCAC and PDU, vehicle control unit VCU, gateway GW, motor controller MCU, battery management system BMS, on-vehicle trinity module electronic control unit ECU connect in parallel on the power bus PCAN, vehicle control unit VCU and gateway GW establish ties on the power bus PCAN, vehicle control unit VCU with the gateway GW both ends built-in have 120 omega's resistance respectively, power bus PCAN adopts power shielding paired line PCAN _ L and PCAN _ H; the automobile body bus BCAN comprises nodes including a multifunctional player MP5, an anti-lock brake system (ABS), an air conditioner (ECC), a low-speed alarm, an air conditioner compressor (EAS), an automobile Body Control Module (BCM), a combined instrument IC and a gateway, wherein the multifunctional player MP5, the anti-lock brake system (ABS), the air conditioner (ECC), the low-speed alarm, the air conditioner compressor (EAS) and the automobile Body Control Module (BCM) are connected in parallel to the automobile body bus BCAN, the combined instrument IC is connected in series to the automobile body bus BCAN, 120 omega terminal resistors are respectively arranged at two ends of the combined instrument IC and the gateway GW, and the automobile body bus BCAN adopts an automobile body to shield twisted pair wires (BCAN _ L) and BCAN _ H; the power bus PCAN and the power bus BCAN are connected in parallel through the gateway GW, the gateway GW is used as a transfer device of two paths of bus data of the power bus PCAN and the power bus BCAN, and the two paths of CAN bus data are read through an on-line diagnosis port OBD and analyzed and diagnosed as fault information generated on the whole vehicle.

The utility model has the advantages that:

1. the CAN bus is adopted to connect each controller module, so that the redundancy and the complexity of arrangement of the wiring harness are reduced, the complexity of the wiring harness and the cost of the wiring harness are reduced, and the overall arrangement space of the automobile is improved;

2. the PCAN and the BCAN realize network interconnection through the gateway GW, can connect a plurality of different networks, repackages the received data, and adapts to the requirements of the system;

3. terminal resistors are connected in series at two ends of the power bus PCAN and the body bus BCAN, so that data interference caused by reflection in the transmission process is prevented;

4. the power bus PCAN and the body bus BCAN both adopt shielded twisted-pair wires, the data transmitted on the two data lines are the same, and the voltage values are mirror images of each other, so that the voltage difference of the two twisted-pair wires is kept at a constant value, and the generated electromagnetic field effects are mutually offset due to opposite polarities;

5. the PCAN and the BCAN are connected in parallel through a gateway GW, the gateway GW is used as a data transfer device of two CAN buses, data of the two CAN buses are read and analyzed through the outside of an OBD port, and therefore fault information generated on the whole vehicle is diagnosed;

6. the OBD port provides real-time data except a standardized diagnostic fault code DTC by using a standardized quick digital communication port, allows the faults of the vehicle to be quickly identified and remedied, and can be used for performing data acquisition, real-time analysis, real-time vehicle diagnosis and real-time test on each controller and also performing a real-time data calibration function on internal parameters of the controller.

Drawings

Fig. 1 is a simplified diagram of a complete vehicle CAN bus of a CAN bus arrangement structure based on an electric light truck according to an embodiment of the present invention;

fig. 2 is a CAN bus network topology connection diagram of a CAN bus arrangement structure based on an electric light card provided in the embodiment of the present invention.

In the figure:

1. a motor controller; 2. a vehicle control unit; 3. a battery management system; 4. a vehicle-mounted three-in-one module; 5. online diagnosis of the fracture; 6. a gateway; 7. a multifunctional player; 8. an electronic shifter; 9. a vehicle door; 10. an air conditioner; 11. a brake anti-lock system; 12. a low speed alarm; 13. a combination meter; 14. a power bus; 15. a body bus; 16. a termination resistance.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1 and 2, the CAN bus arrangement structure based on the electric light truck provided in this embodiment includes two CAN buses, which are respectively a power bus PCAN and a body bus BCAN, a node included on the power bus PCAN includes a motor controller MCU, a battery management system BMS, a vehicle-mounted three-in-one module DCDC, DCAC, and PDU, a vehicle controller VCU, and a gateway GW, the vehicle-mounted three-in-one modules DCDC, DCAC, and PDU are controlled by a vehicle-mounted three-in-one module electronic control unit ECU, the motor controller MCU, the battery management system BMS, and the vehicle-mounted three-in-one module electronic control unit ECU are connected in parallel to the power bus PCAN, the vehicle controller VCU and the gateway GW are connected in series to the power bus PCAN, the vehicle controller VCU and the gateway GW are respectively provided with a 120 Ω resistor, and the power shielding twisted pairs PCAN _ L and PCAN _ H are provided in the two ends; the automobile body bus BCAN comprises nodes including a multifunctional player MP5, an anti-lock brake system ABS, an air conditioner ECC, a low-speed alarm, an air conditioner compressor EAS, an automobile body control module BCM, a combination instrument IC and a gateway GW, wherein the automobile body control module BCM controls the use of an electronic gear shifter and an automobile door, the multifunctional player MP5, the anti-lock brake system ABS, the air conditioner ECC, the low-speed alarm, the air conditioner compressor EAS and the automobile body control module BCM are connected in parallel to the automobile body bus BCAN, the combination instrument IC is connected in series to the automobile body bus BCAN, 120 omega terminal resistors are respectively arranged at two ends of the combination instrument IC and the gateway GW, and the automobile body bus BCAN adopts an automobile body to shield twisted pair wires BCAN _ L and BC; the power bus PCAN and the power bus BCAN are connected in parallel through the gateway GW, the gateway GW is used as a transfer device of two paths of bus data of the power bus PCAN and the power bus BCAN, the two paths of CAN bus data are read through an on-line diagnosis port OBD and analyzed and diagnosed fault information generated on the whole vehicle, after the whole vehicle is electrified, data acquisition and data analysis on the CAN bus, CAN network test of the whole vehicle and data calibration of each control unit CAN be carried out through the OBD port, a terminal resistance value on the CAN bus and voltage values of CAN _ H and ground and CAN _ L and ground in an explicit or implicit state CAN be detected through a universal meter, a waveform change diagram of the voltage is acquired through an oscilloscope, baud rate values on the CAN bus are measured, the CAN bus is adopted to connect each controller module, so that redundancy and complexity of arrangement of a wire harness are reduced, and the complexity of the wire harness and the cost of the wire harness are reduced, the overall arrangement space of the automobile is improved; the PCAN and the BCAN realize network interconnection through the gateway GW, can connect a plurality of different networks, repackages the received data, and adapts to the requirements of the system; terminal resistors are connected in series at two ends of the power bus PCAN and the body bus BCAN, so that data interference caused by reflection in the transmission process is prevented; the power bus PCAN and the body bus BCAN both adopt shielded twisted-pair wires, the data transmitted on the two data lines are the same, and the voltage values are mirror images of each other, so that the voltage difference of the two twisted-pair wires is kept at a constant value, and the generated electromagnetic field effects are mutually offset due to opposite polarities; the PCAN and the BCAN are connected in parallel through a gateway GW, the gateway GW is used as a data transfer device of two CAN buses, data of the two CAN buses are read and analyzed through the outside of an OBD port, and therefore fault information generated on the whole vehicle is diagnosed; the OBD port provides real-time data except a standardized diagnostic fault code DTC by using a standardized quick digital communication port, allows the faults of the vehicle to be quickly identified and remedied, and can be used for performing data acquisition, real-time analysis, real-time vehicle diagnosis and real-time test on each controller and also performing a real-time data calibration function on internal parameters of the controller.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims (1)

1. The utility model provides a CAN bus arrangement structure based on electronic light truck, includes two routes CAN buses, two routes the CAN bus is power bus PCAN and automobile body bus BCAN respectively, its characterized in that:

the power bus PCAN comprises nodes including a motor controller MCU, a battery management system BMS, a vehicle-mounted three-in-one module DCDC, a DCAC and a PDU, a vehicle control unit VCU and a gateway GW, wherein the motor controller MCU, the battery management system BMS and a vehicle-mounted three-in-one module electronic control unit ECU are connected in parallel on the power bus PCAN, the vehicle control unit VCU and the gateway GW are connected in series on the power bus PCAN, resistors of 120 ohms are respectively arranged at two ends of the vehicle control unit VCU and the gateway GW, and the power bus PCAN adopts power shielding twisted pairs PCAN _ L and PCAN _ H;

the automobile body bus BCAN comprises nodes including a multifunctional player MP5, a brake anti-lock system ABS, an air conditioner ECC, a low-speed alarm, an air conditioner compressor EAS, an automobile body control module BCM, a combination instrument IC and a gateway GW, wherein the multifunctional player MP5, the brake anti-lock system ABS, the air conditioner ECC, the low-speed alarm, the air conditioner compressor EAS and the automobile body control module BCM are connected in parallel to the automobile body bus BCAN, the combination instrument IC is connected in series to the automobile body bus BCAN, 120 omega terminal resistors are respectively arranged at two ends of the combination instrument IC and the gateway GW, and the automobile body bus BCAN adopts an automobile body to shield twisted pair lines BCAN _ L and BCAN _ H;

the power bus PCAN and the power bus BCAN are connected in parallel through the gateway GW, the gateway GW is used as a transfer device of two paths of bus data of the power bus PCAN and the power bus BCAN, and the two paths of CAN bus data are read through an on-line diagnosis port OBD and analyzed and diagnosed as fault information generated on the whole vehicle.

Images