Fuel Economy: Hyundai develops world first Active Shift Control for Hybrids

&NewLine;<p>Hyundai Motor Group has developed the world’s first Active Shift&NewLine;Control &lpar;ASC&rpar; transmission technology&period; The innovation optimizes transmission&NewLine;efficiency by monitoring gear shifts 500 times per second&comma; precisely adjusting&NewLine;the transmission rotation speed for faster shift times&period; The new technology will&NewLine;premiere in the upcoming Hyundai Sonata Hybrid and eventually benefit other&NewLine;upcoming Hyundai and Kia hybrids&period;<br>&NewLine;&nbsp&semi;<br>&NewLine;In a release by Hyndai Media team and made available to OpenLife on July 10&comma;&NewLine;the ASC applies new control logic software to the Hybrid Control Unit &lpar;HCU&rpar;&comma;&NewLine;which then controls the electric motor to align the rotational speeds of the&NewLine;engine and transmission to reduce gear shift time by 30 percent&period; The technology&NewLine;also delivers smoother gear changes despite quicker shift times&period;<br>&NewLine;&nbsp&semi;<br>&NewLine;&OpenCurlyDoubleQuote;The development of world’s first ASC technology is a remarkable innovation&NewLine;which incorporates precise motor control to automatic transmission&comma;” said&NewLine;KyoungJoon Chang&comma; Vice President and Head of Powertrain Control System Group of&NewLine;Hyundai Motor Group&comma; &OpenCurlyDoubleQuote;It will not only save fuel but also provide a more fun&NewLine;driving experience for our customers&period;”<br>&NewLine;&nbsp&semi;<br>&NewLine;<strong>Innovation&colon; Independently Developed Control Logic Software Applied to the&NewLine;Electric Motor<&sol;strong><br>&NewLine;&nbsp&semi;<br>&NewLine;Conventional hybrid vehicles do not have torque converters in order to further&NewLine;improve fuel economy as torque converters lose energy during the process of&NewLine;transmission&period; Although fuel efficient&comma; such a system also requires longer shift&NewLine;times to ensure smoother gear changes&period;<br>&NewLine;&nbsp&semi;<br>&NewLine;ASC technology allows the hybrid’s electric motor to also take control of gear&NewLine;shifts by applying new software logic to the Hybrid Control Unit &lpar;HCU&rpar; to&NewLine;mitigate issues with slower shift time&period; The HCU monitors the rotational speed&NewLine;of transmission with a sensor installed inside the electric motor at 500 times&NewLine;per second to quickly synchronize the rotational speed with that of engine&period;<br>&NewLine;<br>&NewLine;With the synchronization&comma; shift time is reduced by 30&percnt; from 500ms to 350ms&period;&NewLine;This not only improves hybrid vehicle’s acceleration performance and fuel&NewLine;economy&comma; but also durability of the transmission by minimizing friction during&NewLine;gear shift&period;<strong><br>&NewLine;<br>&NewLine;<&sol;strong><em><&sol;em><&sol;p>&NewLine;