Commercial vehicle line-up standard test

At this stage, domestic trucks are developing into the high-level automatic driving field. In the process of automatic vehicle driving, AMT transmission, ACC, EBS, EBL, LDW, millimeter wave radar, communication modules, etc. are all basic hardware configurations to ensure vertical The automatic driving, and in the form of the horizontal change lane of the queue form, to some extent, the electronically controlled steering system capable of satisfying the automatic driving of the vehicle is tested. In this process of lane change, the ZF ReAX electro-hydraulic steering system and Bosch electro-hydraulic steering system play a vital role in the details of “hidden work and name”.

Automatic driving lane change

Foton + ZF completes the autopilot line-up exploration

China Truck Network reporter learned on the spot that based on the in-depth cooperation between Foton Motor and ZF , the Foton Auman EST autonomous driving model participating in this line-up is equipped with the ZF TraXon automatic transmission and the steering system. The ZF ReAX electro-hydraulic steering system.

Foton Auman EST autopilot

It is understood that the precise steering of the ReAX electro-hydraulic steering device combines the market-leading automotive electric steering technology with its mature commercial vehicle hydraulic steering gear, making it more precise when steering automatically. Moreover, ZF electric power steering devices may support future wire-steering applications. The unique advantage of the ReAX electro-hydraulic steering system is that it is an important part of the two systems of the driver assistance system (ADAS) and the automatic driving function, which are to improve vehicle safety, reduce the handling burden and improve the logistics process. Important help.

It is worth mentioning that the ReAX electro-hydraulic steering system adopts an integrated design. The ECU, motor, electronic control unit transmission and sensor are integrated in the electronic control module. The system has a non-contact driver torque sensor with steering angle measurement function. And the electronic controller of the safety circuit realizes the advanced steering function, including the input interface supporting the driver's auxiliary function, and can integrate the driver assistance system. It is an essential system for driverless driving and also guarantees the completion of the Foton Auman EST autopilot model. The key to changing the way.

Bosch electro-hydraulic steering system is sought after by the "two strong"

In terms of automatic steering, Bosch 's electro-hydraulic steering system has been sought after by two of the domestic truck companies, Dongfeng Commercial Vehicle and China National Heavy Duty Truck. The system also guarantees the completion of Tianlong KL and Yudeka. Demonstration of automatic driving to change lanes.

Dongfeng Tianlong KL self-driving model

In the application of Dongfeng Tianlong KL and China National Heavy Duty Truck Sudka , the Bosch electro-hydraulic steering system is connected to the in-vehicle electronic equipment to realize the automatic driving steering function. At the same time, the reporter learned that in the Bosch electro-hydraulic steering system, the mechanical connection part of the steering link is still retained, and the steering data is transmitted to the electronic control unit (ECU) through the corner and torque sensors. The ECU can determine the required additional steering torque and start the motor operation through the vehicle's speed and load parameters.

China National Heavy Duty Truck Suideka Autopilot

In addition, based on specific driving conditions, the electric machine in the Bosch electro-hydraulic steering system can assist the steering movement by increasing or decreasing the steering torque and optimize the steering process in this electronic manner. For the automatic steering, the additional steering torque generated by the electric motor can obtain better control feeling and precision at any time. At the same time, in order to prevent the steering system from overloading, an electronic limit stop program can be added to the system to ensure the normal working state of the system.

The successful completion of the commercial vehicle line-up standard verification not only realized the automatic driving exploration of domestic commercial vehicles, but also laid the foundation for the application of driverless technology in the commercial vehicle field. The process of autopiloting to accelerate, decelerate, and change lanes also shows that the domestic commercial vehicles have made great progress in the vertical and horizontal driving in the field of automatic driving, and are closer to the future automatic operation mode.

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