Diversification of steer-by-wire systems

According to Wang Zhifeng, the current wire-controlled steering system shows a trend of diversification in the industry, and no unified standard has been formed. Different OEMs have different expectations for the feel torque, and there are also differences in functional safety requirements. The upper transfer scheme covers a variety of technical routes such as single turbine worm, pulley type, dual turbine, planetary gear, upper direct drive, lower direct drive and direct drive + DC conversion, while the lower transfer scheme mainly includes single actuator based on PEPS (keyless entry and start system), PEPS, single REPS type and dual actuator + single failure redundancy strategy adopted by Tesla.