HD Hyundai Infracore from G2 compact engines to DOTY 2025 DX Series
Hyundai G2 and DX. Doosan Infracore’s G2 series made its first DIESEL International cover at bauma 2013. Twelve years after, at bauma 2025, DIESEL has since become POWERTRAIN and Doosan has become HD Hyundai Infracore. The DX series, crowned DotY 2025, marks a new milestone. But what does it have in common with the G2 series?
What do we mean by the title ‘HD Hyundai Infracore from compact G2 s to DX s’? The first cover of DIESEL International, which you can see below, vouches for Powertrain International’s (the updated evolution of DIESEL magazine) long-standing habit of identifying emerging trends and anticipating market developments.
From the 1.8-litre G2 to the 7.5-litre DX
In the case of the G2 family, we were referring to compact diesel engines, available in 3- and 4-cylinder ranges, with unit displacements from 700 cc to 950 cc. The Korean line-up includes three displacement variants: 1.8L, 2.4L, and the 3.4L flagship model, initially developed for U.S. Bobcat and gradually gaining traction among European (Epiroc, Keestrack, to mention a couple) and Chinese (such as Lovol) OEMs. On November 22, 2022, the 500,000th unit rolled off the production line, 1,000,000 units are expected in 2027. It is still too early to determine how the evolution of the DX05 and DX08 will align with that of the G2 series. HD Hyundai Infracore’s new clean-sheet engines, the DX05 and DX08, DIESEL of the YEAR 2025, feature two types of turbochargers: a single and a two-stage turbocharger. The two-stage turbocharger is designed to maximize output while ensuring engine durability, meaning the single turbocharger does not need to focus on peak power. In fact, its output has been deliberately set lower. This design choice results in the DX05 delivering 30% more low-end torque than other competing 5-liter engines. OEMs have two options: the two-stage turbocharger engine, which offers class-leading power in a compact package, or the single turbocharger engine, which provides good power and torque. We mention Hyundai Construction Equipment (HCE), which selects the engine based on the specific characteristics of each machine.
From specialized tractors to excavators
For instance, the 35-ton excavator is equipped with a DX08 single turbocharger, while the 38-ton excavator features the DX08 with a 2-stage turbocharger. HCE will showcase excavators equipped with the DX08 at Bauma. Meanwhile, Develon (HDI) is set to launch 23-ton and 25-ton excavators powered by the DX05 engine in 2025. HDI is confident that the DX05 can effectively replace existing 6-liter engines. Before entering full-scale production, the DX05 and DX08 engines will undergo extensive field testing in machines set for release in 2025. OEMs will subject them to demanding performance trials, assessing durability, efficiency, and real-world operation under harsh conditions. Manufacturers feedback will play a critical role in refining the final specifications. Given the track record of the G2 series, the DX05 and DX08 are expected to maintain the same standards of reliability.
