Pressure Distribution Module

Fig 1: Identifying Lumbar Support Pump, Pressure Distribution Module And Seat Module

Courtesy of BMW OF NORTH AMERICA, INC.

A pressure distribution module located in the backrest is for inflating and deflating the respective massage or mobilization cushions. The pressure distribution module distributes the air for the massage cycle. There is a motor for this that drives an eccentric shaft. The eccentric shaft is designed so that it alternately opens and closes the air inlets and outlets of the massage cushions and mobilization cushions.

The required air is supplied by the pump for the lumbar-support adjustment. The seat module receives the request for the required air for the massage function from the pressure distribution module. The pump for the lumbar-support adjustment is activated by the seat module.