HAIMA AUTO(SZ:000572) Zhong Guo Qi Che Bao Wang·2026-02-10 03:06Core Insights - The article discusses the extreme cold weather testing conducted by the Shaanxi Fast Group in Heilongjiang, China, focusing on the performance of their intelligent products in harsh winter conditions [2][5][9] Group 1: Testing Overview - The testing period lasted from December of the previous year to February, with flexibility in timing based on testing needs and data results [2] - The testing site was in Heilongjiang, with a focus on various road conditions including highways and closed test tracks [2] - The core products tested included AMT transmissions, automatic transmissions for special vehicles, hydraulic retarders, electric steering systems, and electronic braking systems (EBS) [2] Group 2: Challenges Faced - Engineers faced numerous challenges, including low-temperature cold start performance, sensor responsiveness, and fluid viscosity changes affecting system performance [3][4] - A significant incident involved a test vehicle experiencing multiple sensor failures, requiring on-site repairs in extreme conditions [3] - Another challenge was the freezing of the engine's oil lines, which was addressed using a steam heater to thaw the system [4] Group 3: Performance Results - The overall performance of the intelligent products met the expected validation goals, revealing issues that could not be replicated in laboratory conditions [5][6] - The EBS system showed remarkable reliability and responsiveness in cold conditions, maintaining performance similar to that in normal temperatures [6] - The AMT system demonstrated improved low-temperature shifting success rates due to refined software calibration [6] Group 4: System Integration and Collaboration - The testing highlighted new challenges in system integration, particularly when multiple intelligent products were used together [6] - Solutions were developed for managing braking forces to prevent wheel lock-up and maintain vehicle stability [6] Group 5: Technological Innovations - The R&D team introduced innovative solutions to address low-temperature challenges, including a comprehensive low-temperature cold start strategy for AMT [7] - The EBS system was optimized for reliability and responsiveness across various road conditions [7] Group 6: Data Utilization and Industry Impact - The testing generated vast amounts of data, which will drive software iterations and hardware design optimizations for future products [8] - The successful completion of the cold weather tests positions the company as a leader in the commercial vehicle parts industry, setting a benchmark for technological advancement [9]