Driver and Passenger Protection Control Unit
In the driver and passenger protection system control unit (RCM) There are two zones that determine the need to include one or another element of the system:
Zone 1 - Assessing the severity of the accident: The first zone determines the severity of the accident according to the data from the built-in acceleration sensor, frontal impact sensor and the sensor in the seat belt buckle. Based on this data, the RCM determines the required level of airbag deployment and transmits the information to the second zone - the deployment handler.
Zone 2 - Trigger handler: The condition of the seat position sensor, the passenger classification system and the sensors in the seat belt buckles is examined before making a decision on the inclusion of certain protective equipment. For example, if the passenger classification system indicates that the passenger's seat is not occupied, the safety devices on the passenger's side will not be activated, even if all available safety devices are activated for the driver.
The energy reserve in the controller ensures its operation for at least 150 ms in case of an open power supply circuit during a collision. The stored energy is sufficient to provide signals to activate the airbags and pretensioners for the driver and front passenger.
When the ignition is turned on, the RCM performs cyclic monitoring of the system. When a fault is detected, the RCM stores the appropriate fault code and sends an airbag warning light activation signal. Fault information can be retrieved using the Land Rover certified diagnostic system. If a fault is detected that could result in an erroneous gas generator actuation signal, the RCM disables the signal circuit. In this case, this gas generator will not work in the event of a collision.
Comments on this article