Performance Requirements For Automotive Electric Struts
The performance requirements for automotive electric struts primarily encompass the following aspects:
Power and Torque: The strut must provide sufficient power to ensure the smooth opening and closing of the tailgate or hood, capable of overcoming various resistances-such as the weight of the door and frictional forces-to function normally across diverse environments and conditions.
Operating Speed: The opening and closing speed must be moderate; typically, the duration for a single opening or closing cycle is controlled within 4 to 6 seconds. This balance serves to save user time while preventing excessive speeds that could pose safety hazards or subject components to undue mechanical shock.
Precision and Stability: During operation, the system must maintain high precision with minimal repetitive positioning error. It must function stably under varying operating conditions, exhibiting minimal susceptibility to environmental factors such as temperature, humidity, and vibration.
Reliability and Durability: The system must guarantee fault-free operation throughout the vehicle's service life, even under frequent use. This is validated through rigorous durability testing-such as simulating over 100,000 opening and closing cycles-to ensure excellent fatigue resistance, preventing performance degradation or component failure over the long term.
Safety: The system must incorporate multiple safety protection mechanisms, such as an anti-pinch function that immediately halts or reverses motion upon detecting an obstruction. It must also feature overload protection to prevent damage to the motor or other components caused by excessive loads. Furthermore, the strut structure must be robust enough to withstand specific external forces without deformation or damage, thereby ensuring operational safety.
Noise Levels: Operation must generate minimal noise to create a quiet and comfortable driving environment for the user; typically, noise levels measured at a specified distance are required not to exceed 45 decibels.
Sealing, Water, and Dust Resistance: The system must possess excellent sealing properties to prevent the ingress of dust, moisture, and other contaminants that could compromise performance or service life; generally, it is required to meet or exceed the IPX4 water resistance standard.
Electromagnetic Compatibility (EMC): The system must comply with relevant EMC standards, ensuring that it neither generates electromagnetic interference that affects other vehicle electronic systems nor is susceptible to interference from other devices.
Lightweight Design: While maintaining uncompromised performance, the design should aim to minimize weight as much as possible; this contributes to reducing the vehicle's overall energy consumption and enhancing its handling characteristics.
