Hyundai motor group develops active shift control for hybrids
Hyundai Motor Group has developed Active Shift Control (ASC) transmission technology, an innovation that the company says optimises transmission efficiency by monitoring gear shifts and precisely adjusting the transmission rotation speed for faster shift times.
ASC technology allows the hybrid’s electric motor to also take control of gear shifts by applying new software logic to the Hybrid Control Unit (HCU) to mitigate issues with slower shift time. The HCU monitors the rotational speed of transmission with a sensor installed inside the electric motor at 500 times per second to quickly synchronise the rotational speed with that of engine.
With the synchronisation, shift time is reduced by 30 per cent from 500ms to 350ms. This, Hyundai says, not only improves the hybrid vehicle’s acceleration performance and fuel economy, but also the durability of the transmission by minimising friction during gear shift.
13 Aug 2019