The collaborative operation of the revolving door bolt and the remote control actuator relies on the precise mechatronic design. The actuator is usually driven by an electromagnetic or micro-motor and generates a pulling force of 20N to 35N within 300 milliseconds after receiving a 12V DC electrical signal to pull a 2mm diameter hard steel wire Cable (Bowden Cable). Shift the rotating gripper from the locked position by 4.5mm±0.3mm to achieve unlocking. Modern vehicle systems such as the Tesla Model Y adopt CAN bus communication. The transmission rate of remote control instructions reaches 500kbps, and the delay from key triggering to door bolt opening is controlled within 0.8 seconds. The measured data of Audi e-tron in 2023 shows that the power consumption of its electronic actuator is only 5.2W, which is 47% more energy-efficient than the traditional central locking system.
Reliability and environmental adaptability are the core indicators of in-vehicle systems. The military-grade actuator passed the MIL-STD-202H vibration test (frequency 10Hz-2000Hz, acceleration 50g), and the torque output fluctuation was less than ±8% within the temperature range of -40℃ to 85℃. During the tests of the Toyota Land Cruiser in the Sahara Desert, after its actuator completed 100,000 cycles in an environment with a dust concentration of 120mg/m³, the failure probability of its operation was only 0.05%. The electric bus project of CATL has further verified its waterproof performance – the IP67-level actuator still maintained a traction force of 95N after being immersed in a water depth of 1 meter for 30 minutes, meeting the requirements of heavy rain conditions.
The intelligence of the system brings about functional upgrades. The rotating door latch of the BMW i7 model, which integrates a Hall sensor (with an accuracy of ±0.1mm), can monitor the position of the latch in real time. When the door is detected to be slightly ajar (with a gap >4mm), the on-board ECU will issue an alarm within 0.3 seconds and automatically relock. The haptic feedback system developed by Modern Mobis can generate vibrations of a specific frequency (165Hz±15Hz) when unlocking, increasing the operation recognition rate for visually impaired users by 90%. General Motors’ patented technology shows that through current waveform analysis (with a sampling rate of 1kHz), the system can identify 98% of foreign object jamming risks and instantly cut off power, keeping the anti-jamming force within the safety threshold of 35N.
Economic benefits promote the popularization of technology. The modular actuator reduces the weight of the single-vehicle wiring harness by 1.2kg (saving $18 in cable costs) and shortens the assembly time of the production line by 25 seconds. Bosch’s 2024 report indicates that the rotary door latch system with integrated actuators reduces the R&D costs of automakers by 32% and increases the efficiency of fault diagnosis by 60% – the universal interface (FAKRA standard) supports OBD-II devices to complete all door lock diagnoses within 3 minutes. Aftermarket data shows that the average service life of such systems is 10 years or 250,000 cycles, and the maintenance frequency is 73% lower than that of mechanical structures.
The safety redundancy design meets the requirements of ASIL-B grade. The Mercedes-Benz EQS is equipped with a dual-coil actuator (the resistance difference between the main and secondary coils is less than 0.15Ω). When the main system fails, the backup circuit can take over within 120ms. The collision safety mechanism of the Volvo EX90 will forcibly lock all revolving door bolts within 20ms after the airbag deployment signal is sent out, ensuring that the door displacement is less than 100mm during a side impact at 50km/h. The new regulations of China in 2024 (GB/T 38459-2023) further mandate that the door lock systems of electric vehicles maintain their functions under an electromagnetic interference of 500V/m, promoting technological upgrades in the industry. Continental’s latest solution controls the probability of false actions at the level of 10⁻⁹ times per hour through three-channel signal verification.