As CAFE sets strict standards to reduce emissions and improve fuel economy for passenger vehicles more major automotive companies will look to implement multi-speed dual-clutch transmissions. Dual-clutch transmissions are essentially two separate manual transmissions working as one unit where the gear shifting is carried out by the electrohydraulic components inside the transmission.
TLX Technologies has developed a proportional control solenoid for the electrohydraulic component in dual-clutch transmissions. These proportional control solenoids are used to operate spool valves in the hydraulics of dual-clutch transmissions during gear shifting. Proportional control of the spool valves is required for synchronization of gears during a shift to reduce shift shock. During the development of these proportional control solenoids TLX Technologies encountered multiple challenges which ultimately led to an innovative and efficient design.