Recently, the self-driving truck equipped with the Yinche Technology Xuanyuan system successfully completed the high temperature environment test in Hainan, and successively passed the test of high cold and high temperature extreme environment, Yinche is one step closer to the commercial operation of the self-driving truck delivered at the end of 2021.
<h1 class="pgc-h-arrow-right" data-track="28" > industry new topic High temperature testing of autonomous driving systems</h1>
Extreme environmental testing is a necessary part of the whole vehicle before mass production, after a strict product development and testing process, is one of the important signs that the product meets the mass production standards.
The automatic driving system includes cameras, lidar, millimeter wave radar, high-precision positioning equipment and other advanced sensors, as well as a highly integrated high-computing power computing platform, as well as a wire control chassis that opens more interfaces, the number of electronic and electrical equipment of the vehicle has increased significantly compared with the traditional heavy truck, and whether the automatic driving system can work stably in a continuous high temperature state is a necessary condition to ensure the reliable and durable operation of mass production vehicles.
For this new topic of high-temperature testing of mass-produced automatic driving systems, Yinche designed a targeted test plan and carried out a test for more than a month in Hainan's unique high-temperature, high-humidity, high-corrosion, and rainy "three highs and one more" characteristic climate.
<h1 class="pgc-h-arrow-right" data-track="27" > the complete hardware of the Yingche Xuanyuan system passed the harsh high temperature test</h1>
In the high temperature salt spray test, 5% of the brine is sprayed directly on the body, and the exposed sensors will simulate the state of accelerated corrosion to verify the reliability of the complete set of vehicle-grade hardware in the extreme environment;
In the high temperature and exposure test, the surface temperature is as high as 60 °C or more, the average humidity is about 90%, the sample car is placed in the high humidity environment cabin for 8 hours, and the continuous exposure field is carried out for more than 10 hours to test the heat dissipation and anti-aging performance of various equipment electronic components;
The complete set of vehicle-grade hardware has withstood high temperatures and corrosion. In addition, the self-developed computing platform of Yincher Technology adopts water-cooled heat dissipation, which can stabilize the temperature within 55 °C under various working conditions, and always ensure the smooth operation of the computing platform.
<h1 class="pgc-h-arrow-right" data-track="19" >-by-wire chassis high temperature limit challenge Steering and braking performance exceeds industry levels</h1>
In the steering test, long-term work in a high temperature environment may lead to a decline in the response of the steering system, which in turn affects the control accuracy of the Xuanyuan system on the vehicle, the vehicle is fully loaded, the engineer conducts a performance response test on the hydraulic oil temperature of the steering system from 70 °C to 130 °C, and the steering system can still meet the control accuracy at the limit oil temperature of 130 °C.
In the brake test, the high temperature environment will lead to a decrease in braking performance acceleration, the engineer in the vehicle full load state continuous braking, after 20 brake cycles under the condition of 75% higher braking input than the standard, the braking system still achieves 25% higher braking performance than the control standard.
In addition to extreme environmental testing, The system and components of Wincher Regulus have been strictly certified in three stages, including engineering, development and production, as well as electrical, mechanical, environmental and electromagnetic test verification to meet the reliability and durability requirements of the 1.5 million kilometer life cycle of heavy trucks. The self-driving trucks jointly developed by Yingche, Dongfeng Commercial Vehicles and China National Heavy Duty Truck will be mass-produced by the end of 2021.
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