Prior to the introduction of the locally-assembled (CKD) Proton X70, the company has confirmed that the upcoming model will be fitted with a new 7-speed wet-type dual-clutch automatic transmission, superseding the 6-speed torque converter unit.
Recently, Geely flew selected members of the media to its headquarters in Zhejiang, China as a preview for the new transmission.
DCT, reliable meh?
Speaking to members of the media, Geely’s Senior Chief Engineer Tejinder Singh said that their new wet-type dual-clutch automatic eliminates most of the issues that stigmatized DCTs.
According to Paultan.org, Tejinder said that the biggest cause for dry-type dual-clutch is heat – these gearboxes aren’t oil-cooled, which reduces its lifespan considerably.
Further compounding the issue is the fact that these dry-type dual-clutch transmissions are sensitive to weather conditions – shifts may be good when conditions are favourable, but may get worse as the weather changes.
To overcome this issue, Tejinder said that Geely’s wet-type dual-clutch automatics are oil-cooled and fed with 12 to 15 litres of transmission fluid every minute, thus keeping the transmission within a set limit, prolonging its lifespan.
Geely has also tested its dual-clutch transmission in various conditions, clocking over 9 million km across extremely hot and freezing spots on Earth, plus city driving in towns like Shanghai and Gothenburg.
But why pick a DCT over a proven torque converter automatic?
The reason is simple – efficiency.
Unlike traditional torque converter automatics with an average efficiency figure of less than 90%, Geely’s own 7-speed dual-clutch automatic boasts an overall efficiency figure of 94.6%, with the maximum hitting 97%.
As such, when fitted with the transmission, the China-market Boyue’s claimed fuel consumption has dropped slightly – from 7.8-litres/100 km to 7.5-litres/100 km.
Also new is the shift-by-wire gear shifter and paddle shifters, though it remains to be seen if the latter will be offered on the locally-assembled X70.