Hyundai’s Active Shift Control Tech Cuts Hybrid Gear Shift Time By 30 Percent

Hyundai Motor Group says it has made a breakthrough in hybrid vehicle transmissions.

The Hyundai, Kia and Genesis-owning conglomerate has developed a “world-first technology” that improves gear-shift efficiency for hybrids.

Now set for mass production, the in-house developed is called Active Shift Control (ASC) and Hyundai claims it reduces gear-shift times by 30 percent while at the same time adding to driving fun and improving fuel economy.

The technology monitors gear shifts 500 times per second, “precisely adjusting the transmission rotation speed for faster shift times,” the carmaker explains in a press release. ASC 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 shorten shift times which are usually slow on hybrids which typically lack torque converters.

Also Read: 2020 Hyundai Sonata Turned Fully Autonomous By Russia’s Yandex

By aligning the rotational speeds of the engine and transmission gear shift times are reduced by up to 30 percent from 500 milliseconds to 350 milliseconds. Despite quicker shift times, ASC is said to deliver smoother gear changes as well.

The first vehicle to feature Active Shift Control is the upcoming Sonata Hybrid, with the tech later to find its way on other Hyundai and Kia hybrids.

“The development of world’s first ASC technology is a remarkable innovation which incorporates precise motor control to automatic transmission. It will not only save fuel but also provide a more fun driving experience for our customers,” said Kyoung Joon Chang, Vice President and Head of Powertrain Control System Group of Hyundai Motor Group.

Finally, Hyundai claims the new technology also increases durability of the transmission by minimizing friction during gear shift.


    Complicated . . .
    When it breaks down, it may affect the bypass lines or even the seventh Fetzer valve. To fix it you’re going to need a some 30 wt. ball bearings and a set of gauze pads

    • khc

      ‘Probably unrepairable, requiring full transmission replacement for $8,000+ (at a time when the car is worth $10k). And all because of a worn Fetzer valve.

  • eb110americana

    This basically sounds like active rev matching for hybrids–only instead of matching the engine RPM to the transmission, the electric motor is tasked with precisely matching the transmission/driveline speed to that of the engine. This makes sense, as it would only make shifts smoother, faster, and less taxing on mechanical components.

  • SteersUright

    Awesome to see innovation from a brand once known as little more than a copycat. Hyundai looking more impressive every day.

    • khc

      I’m not impressed. Powertrain “innovations” over the last number of years have been primarily to benefit manufacturers’ CAFE ratings – no matter how slightly – while adding complexity that’s of little or no real benefit to the customer, despite the advertising hype. I’m not knocking Hyundai. They are being forced into this situation, like everyone else, by evermore-strict fuel economy standards.

    • bd0007

      Pretty much what was stated about the Japanese Big 3; have to start from somewhere and get the basics down.

  • bd0007

    One thing doesn’t preclude the other and you must have missed the part about how it also improves fuel economy.

    Plus, not everyone interested in a hybrid wants to drive a Prius.

    Battery-assisted ICE will be the main source of propulsion for the near-term w/ the 48V system being the default system (as the Germans and other manufacturers have already been doing).

    That means the need for a transmission that not only improves fuel economy, but keeps driving on the fun side – again, not everyone interested in battery assisted vehicles (whether it be a 48V, full-hybrid or PHEV) want the feeling of driving a Prius.

  • Super Rob

    Yet they can’t get the 7-DSC with the 1.6T to actually move when you hit the gas.

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