Abstract: A child restraint system is disclosed. The child restraint system can include a control circuit in communication with an accident sensor system. The child restraint system can also include an actuator. The control circuit is configured to control the actuator based on input from the accident sensor system. The actuator can actuate a safety feature of the child restraint system within a reaction time window of the accident sensor system. The actuator can include a pyrotechnic initiator. The actuator can be a leveling actuator or a tensioning actuator, for example. The actuator can be an inflatable airbag or a deployable piston, for example.

Abstract: Child restraint systems are disclosed. The child restraint systems can include a base portion and a seat portion. The child restraint systems can include at least one motor-driven subsystem for installing the child restraint system in a vehicle, such as a motor-driven tensioner and/or motor-driven leveler. The motor-driven subsystem(s) can be coupled to a power source, such as a battery pack. The child restraint systems can also include a microcontroller, which can be coupled to the power source and a motor for the motor-driven subsystem. The base portion and/or the seat portion can include a plurality of sensors in communication with microcontroller. The sensors can detect an installation condition and/or state of the child restraint system.