DP develops 'non-stick' solenoid tip seal for automotive ride controller
Minimising the transmission of engine noise and vibration to the
passenger compartments of modern cars is becoming an important function
of automotive ride management systems. One OEM is working on a system
that includes an 'intelligent' engine mount that automatically adjusts
its stiffness according to engine speed/load.
The active component is a solenoid, the tip of which seals an air bleed
hole in the mounting when required to do so by the electronic management
system. In order to ensure a good seal over the life of the car, the tip
seal material has to combine softness with durability but have absolutely
no tendency to stick in operation.
DP Seals was called in to help and subsequently developed a soft, durable
rubber tip for the solenoid. To meet the need for non-stick operation,
the seals are subjected to a chlorine-rich atmosphere that etches the
surface. Extensive testing showed that the chlorinated rubber tip did not
stick, no matter how many times the solenoid was de-activated, thus
proving the reliability of the unit.