从“机械驱动”向“电子驱动”，线控底盘近期为何迅速升温？

Core Viewpoint - The rise of "software-defined vehicles" and "AI-defined vehicles" has led to increased interest in steer-by-wire chassis technology, which is seen as a crucial component in the transformation of automotive electronic and electrical architecture [2] Group 1: Technology and Functionality - Steer-by-wire chassis is regarded as the "nerve center" of automotive intelligence, enabling significant improvements in response speed and control precision compared to traditional mechanical systems [2] - The response time for steer-by-wire steering can reach 20ms, more than three times faster than traditional systems, making it essential for Level 3 and above autonomous driving [2] - The electronic hydraulic brake (EHB) system enhances braking energy recovery efficiency by over 30% and addresses the vacuum source issue in electric vehicles [2] Group 2: Driving Experience Enhancement - Steer-by-wire chassis offers upgrades in precision, flexibility, and personalization, achieving a weight reduction of 15%-20% through lightweight design [3] - The modular architecture improves vehicle efficiency, extending driving range by 5%-8%, and provides a transformative control experience through lossless transmission of electrical signals [3] - The system allows for driver-customizable modes, enhancing driving styles and experiences, such as "sport mode" and "comfort mode" [3] Group 3: Safety and Challenges - Despite improvements in safety through hardware redundancy, steer-by-wire systems face risks not encountered by traditional mechanical systems, including sensor signal interference and electromagnetic compatibility issues [4] - The complexity of steer-by-wire technology results in significantly higher R&D and manufacturing costs compared to traditional chassis systems [5] Group 4: Market Trends and Future Development - The penetration rate of steer-by-wire chassis in the domestic market is projected to be only 15% by 2024, primarily in high-end models priced above 300,000 yuan [5] - Short-term developments include the One Box solution for braking systems, which will enhance integration and reduce costs, while long-term goals involve the integration of braking, steering, and suspension control into a unified chassis control system [5] - By 2028, it is expected that full-scenario steer-by-wire chassis will be available in mainstream models priced above 300,000 yuan, advancing the smart driving experience [5] Group 5: Strategic Recommendations - Industry experts suggest launching comprehensive steer-by-wire solutions for smart vehicles priced above 300,000 yuan, while also developing cost-effective options for mid-range markets [6] - A three-dimensional empowerment system involving technology, policy, and capital is recommended to encourage the adoption of steer-by-wire technology [6] - The visualization of safety benefits, such as a 30% reduction in emergency braking distance, is seen as a pathway to market acceptance [6] Group 6: Industry Transformation - Steer-by-wire technology represents not just a technical iteration but a significant shift in the automotive industry's value distribution, moving from mechanical manufacturing to digital intelligence [7] - The current period is viewed as an optimal time for companies to seize the opportunity in chassis intelligence, with the potential for domestic enterprises to overcome previous technological monopolies [7] - The evolution of steer-by-wire systems is indicative of the broader transition from mechanical to electronic driving, paving the way for a more intelligent automotive future [7]