Is Hyundai Working on a 2-Cylinder Engine?

Jason Siu
by Jason Siu

A recently published patent unveils Hyundai has been working on a two-cylinder engine.

The patent application was filed on December 9, 2016, and published on March 15, 2018, and details a powertrain with a two-cylinder engine and a motor for reducing vibration and noise, resulting in improved fuel economy. The patent primarily focuses on a balance weight designed to offset the weight of the pistons with a variety of ways it can be mounted: between the cylinders, between the engine and the assist motor, or on the opposite side from the motor.

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“A powertrain in one form of the present disclosure may include: a 2-cylinder engine which includes a first piston disposed within a first cylinder, a second piston disposed within a second cylinder, and a crankshaft connected to the first and second pistons through a first crank pin and a second crank pin, respectively; a motor; a transmission connected to the motor; a clutch configured to selectively connect the motor to the crankshaft; and a weight portion including an inner rim configured to contact the crankshaft, a disk connected to the inner rim and an outer rim of the weight portion, and a balance weight,” reads the patent. “In particular, the balance weight is connected to the inner rim, the disk and the outer rim. The balance weight may be disposed to be symmetrical to corresponding positions to positions of the first and second crank pins.”

While the depth of the patent is mostly technical and not entirely interesting, the takeaway here is that Hyundai is looking into the development of a two-cylinder engine in the name of fuel efficiency. It wouldn’t be the first time a car uses a two-cylinder engine, with the Volkswagen XL1 powered by an 800-cc two-cylinder turbocharged diesel engine. Whether or not we will ever see Hyundai’s two-cylinder engine in production is an entirely different question.

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Jason Siu
Jason Siu

Jason Siu began his career in automotive journalism in 2003 with Modified Magazine, a property previously held by VerticalScope. As the West Coast Editor, he played a pivotal role while also extending his expertise to Modified Luxury & Exotics and Modified Mustangs. Beyond his editorial work, Jason authored two notable Cartech books. His tenure at saw him immersed in the daily news cycle, yet his passion for hands-on evaluation led him to focus on testing and product reviews, offering well-rounded recommendations to AutoGuide readers. Currently, as the Content Director for VerticalScope, Jason spearheads the content strategy for an array of online publications, a role that has him at the helm of ensuring quality and consistency across the board.

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2 of 7 comments
  • Ted Tedness Ted Tedness on Apr 11, 2018

    Oh great.... ANOTHER engine that will be recalled from Hyundai or a silent recalled/warranty because Hyundai can't build a robust engine to save their sole.

  • Io Io on May 04, 2018

    Hyundey-Davidson engine ^^)