Hyundai Motor Group (HMG) introduced its next-generation hybrid powertrain system at the company’s ‘Next-Gen Hybrid System Tech Day’ in Seoul this week, which it says will power a new generation of “industry-leading” hybrid vehicles for global markets under the Hyundai, Kia and Genesis brands – starting with the recently launched all-new Hyundai Palisade SUV.
South Korea’s leading automaker claims its “significantly-enhanced” hybrid system delivers greatly enhanced power and efficiency compared with the previous system, and is designed to improve “the driving and ownership experience of future Group products with customer-focused benefits.”
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HMG said the new hybrid transmission system comes with two integrated motors that can be paired flexibly with a wide range of internal combustion engines (ICE), allowing for optimized performance and fuel efficiency across a range of vehicle classes. Various electrification-focused technologies have also been incorporated into the new hybrid system to enhance driving performance, refinement and ride comfort, the company added.
Dong Hee Han, head of HMG’s Electrified Propulsion Test Center, confirmed: “We have developed an innovative new hybrid system that integrates our long-accumulated engine, transmission and hybrid system development experience with the electrification technology applied to our world-class electric vehicles. We will continue to develop innovative technologies that actively utilize electrification capabilities during the transition to EVs, providing customers with eco-friendly vehicles that offer superior performance.”
The new hybrid transmission system includes a new P1 motor that handles starting, battery energy generation and energy deployment to assist propulsion. The P2 driving motor is responsible for propulsion and regenerative braking. This integrated dual-motor setup is said to improve power, performance, and fuel-efficiency while achieving smooth shifting and reduced noise and vibration for a more refined driving experience.
HMG confirmed that the new hybrid transmission system “can be paired flexibly with ICE engines across the group’s lineup, delivering a system output from the low-100 PS range to the mid-300 PS region and allowing for broad application from sub-compact to large vehicles.” The new system also integrates “convenience features commonly found in the group’s EVs, such as Stay Mode, Vehicle-to-Load (V2L) functionality, and Smart Regenerative Braking.”
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By GlobalDataThe new hybrid transmission system is initially being used in combination with a newly-developed gasoline 2.5-litre turbo engine in the all-new Palisade, to be followed by a 1.6-litre turbo hybrid powertrain in the new Santa Fe.
HMG pointed out that “by reassigning the 2.5L engine’s starting and generating tasks to the newly added P1 motor, the turbo hybrid powertrain minimizes power losses. Combined with enhanced cylinder flow within the new engine and the adoption of a high-efficiency cycle optimized for hybrids, fuel efficiency has been improved.”
“Typically, internal combustion engines generate power through four strokes, while the 2.5L turbo hybrid system utilizes an ‘over-expansion cycle’, intentionally delaying intake valve closure during compression to lower the effective compression ratio of the mixed gas in the cylinder while maintaining a high expansion ratio during the combustion process. This technique reduces power consumption during mixture compression while maximizing energy generated after combustion, significantly enhancing engine efficiency.”
The gasoline 2.5 turbo hybrid system used in the all-new Palisade, launched earlier this year, delivers maximum fuel efficiency of 14.1 Km/litre, a maximum system output of 334 PS, and maximum torque of 460 Nm, offering approximately 45% greater fuel efficiency, a 19% increase in maximum power, and a 9% improvement in maximum torque.
