ShipCalculators.com

Published

HHI-EMD (Hyundai Heavy Industries Engine and Machinery Division)

Hyundai Heavy Industries Engine and Machinery Division (HHI-EMD) is the largest marine engine builder in the world measured by total annual kW production. Headquartered in Ulsan, South Korea, HHI-EMD builds large-bore slow-speed two-stroke engines under license from MAN B&W (Everllence) and WinGD, and develops its in-house HiMSEN medium-speed engine line. In March 2023 HHI-EMD passed 200 million horsepower cumulative low-speed production. Annual capacity is approximately 160 large-bore (low-speed) engines plus 600 mid-size engines, supplying HD Hyundai Heavy, HD Hyundai Mipo, HJ Shipbuilding, plus export to Chinese and other yards. This article covers HHI-EMD’s history, production, product range, and market position. Visit the home page or browse the calculator catalogue for related propulsion engineering tools.

Contents

Background

HHI-EMD is one of two pillars of the global marine engine market (the other being Hanwha Engine, formerly HSD/Doosan), with a third smaller player in Mitsui E&S DU. Together with the Chinese CSSC subsidiaries and Japanese builders, the Korean engine builders dominate slow-speed two-stroke engine production globally.

Marine engine market structure differs from typical capital equipment: the design is done by a small number of OEMs (MAN-ES/Everllence, WinGD, J-ENG), while the physical manufacturing is done by license-builders. HHI-EMD is the world’s largest license-builder by output, covering both major OEMs (MAN B&W and WinGD) plus its own HiMSEN medium-speed designs.

Key facts:

  • Headquarters: Ulsan, South Korea (within HD Hyundai Heavy Industries shipyard complex)
  • Annual capacity: ~160 large-bore engines + ~600 mid-size engines
  • Cumulative low-speed production: >200 million horsepower (March 2023 milestone)
  • Cumulative HiMSEN production: >15,000 engines (January 2024 milestone)
  • Export reach: 60+ countries

This article covers HHI-EMD’s corporate history, production scope, product range, and strategic significance.

Corporate context

HD Hyundai Group

HHI-EMD operates within the HD Hyundai Group (formerly Hyundai Heavy Industries Group), one of South Korea’s largest industrial conglomerates. The group’s principal companies include:

  • HD Hyundai Heavy Industries (HHI): shipbuilder, parent of HHI-EMD as the engine division
  • HD Hyundai Mipo: smaller and mid-size shipbuilder, principal HHI-EMD customer
  • HD Hyundai Samho: container ship and large-vessel shipbuilder
  • HD KSOE (Korea Shipbuilding & Offshore Engineering): holding company over the shipbuilding subsidiaries
  • HD Hyundai Electric, HD Hyundai Construction Equipment: other group companies

HHI-EMD as a “division” of HHI rather than a separate legal entity reflects HD Hyundai’s organisational structure. In some contexts HHI-EMD is referred to as “Hyundai Engine,” “Hyundai-Heavy Industries Engine Business Unit,” or other variants.

Within HHI shipyard

The HHI-EMD engine plant is integrated into the Ulsan shipyard complex. This integration provides:

  • Direct supply chain to HD Hyundai’s own shipbuilding (no shipping engines off-site for installation)
  • Common engineering, quality assurance, and logistics infrastructure
  • Strategic flexibility to balance internal production vs export

The Ulsan facility includes large-bore engine assembly halls, machining capability, and a comprehensive test bed facility for engine commissioning before delivery.

Production history

Early decades

HHI-EMD’s engine production grew steadily from the 1970s onwards alongside HD Hyundai’s expanding shipbuilding capacity. Early production was primarily license-built MAN B&W engines for in-house shipbuilding requirements.

Cumulative milestones

Key cumulative production milestones:

  • 1996: First major export of marine engines to non-HHI yards
  • 2007: 100 million horsepower cumulative production
  • March 2023: 200 million horsepower cumulative low-speed production — the fastest in the world to reach this milestone, and a strong indicator of HHI-EMD’s scale leadership

Current production rates

Annual production capacity (per published HHI material):

  • Large-bore (slow-speed two-stroke): ~160 engines per year
  • Mid-size (HiMSEN medium-speed): ~600 engines per year

Total kW capacity is approximately 7-8 million kW per year of low-speed plus several million kW of HiMSEN. The combination makes HHI-EMD the largest engine builder in the world by total kW.

Customer mix

HHI-EMD supplies engines to:

  • HD Hyundai’s own shipyards (HD Hyundai Heavy, HD Hyundai Mipo, HD Hyundai Samho) — the largest single customer block
  • Other Korean shipyards (HJ Shipbuilding, Korea Shipbuilding & Offshore Engineering)
  • Chinese shipyards (export to mainland China)
  • Other Asian shipyards
  • Specific direct orders from ship-owners (rare but increasing)

Product range

Slow-speed two-stroke

HHI-EMD builds the full range of large-bore two-stroke engines under license:

MAN B&W variants (Everllence licenses):

  • MC, MC-C, ME-B, ME-C
  • ME-GI (LNG dual-fuel)
  • ME-LGIM (methanol dual-fuel)
  • ME-LGIP (LPG dual-fuel)
  • ME-LGIA (ammonia dual-fuel) — first commercial delivery scheduled for 2026 from HHI-EMD via EXMAR

WinGD variants:

  • X-series mainstream
  • X-DF (LNG dual-fuel)
  • X-DF2.0 with iCER
  • X-DF-A (ammonia) — installed on EXMAR vessels in 2025-26

The bore range covered: 35 cm (small-bore X35, S35MC) up to 95 cm (G95ME-C, X92-B). Power range: ~3,500 kW to ~87,000 kW per engine.

HiMSEN medium-speed

HHI-EMD’s in-house HiMSEN brand (Hyundai HiMSEN, Hyundai Medium Speed Engine) is the company’s own four-stroke medium-speed product line, launched in March 2001 with the H21/32 and H25/33. HiMSEN now spans:

  • H21/32: 210 mm bore × 320 mm stroke; 5-9 cylinders inline; ~200 kW per cylinder
  • H25/33(V): 250 mm × 330 mm; 6-9 inline, 12-18 V; ~340 kW per cyl
  • H32/40(V): 320 mm × 400 mm; up to 4,500 kW
  • H35/40(G/V): 350 mm × 400 mm; up to 9.3 MW
  • H46/60(V): 460 mm × 600 mm; up to 25.9 MW
  • H54/60(G/DF/V): 540 mm × 600 mm; up to 25.9 MW

HiMSEN serves auxiliary genset and main propulsion roles on a wide range of merchant ships and OSVs. Cumulative HiMSEN production passed 15,000 units in January 2024.

DF and methanol HiMSEN

HHI has developed dual-fuel and methanol-capable HiMSEN variants:

  • H35DF, H32DF, H46DF, H54DF: LNG dual-fuel
  • Methanol HiMSEN: ignited the world’s first commercial methanol-powered HiMSEN engine for Maersk in 2024

Manufacturing capability

Large-bore facility

The large-bore engine assembly facility at Ulsan can simultaneously work on multiple very large engines (up to 95 cm bore, 14 cylinders, 80,000+ kW). The facility includes:

  • Multiple parallel assembly lines
  • Heavy-lift cranes for component handling (bedplates, A-frames, cylinder covers, crankshafts)
  • Component machining (some major components are machined on-site, others bought-in)
  • Quality assurance and inspection

Test bed

The HHI-EMD test bed accommodates large-bore engine commissioning. Each engine undergoes:

  • Mechanical assembly verification
  • Lubricating system testing
  • Cooling system testing
  • Initial start tests
  • Load testing (typically to ~75% MCR; full-load testing at customer discretion)
  • Performance verification (SFOC, exhaust temperatures, cylinder pressures)
  • Class society survey

After test bed commissioning, the engine is loaded onto specialised transport for shipment to the building shipyard (or installed directly if HD Hyundai’s own yard).

HiMSEN facility

A separate HiMSEN production line operates with higher throughput (smaller engines, more units per year). HiMSEN production has its own test cells and quality processes.

Strategic position

Korean marine engine duopoly

HHI-EMD and Hanwha Engine (formerly HSD/Doosan, see separate article) form a duopoly in Korean marine engine production. Together they account for the majority of slow-speed two-stroke engines built worldwide.

Customer relationships with OEMs

HHI-EMD’s relationships with both MAN-ES (Everllence) and WinGD are essential. As a licensee:

  • HHI-EMD builds engines to OEM specifications
  • Engineering changes are coordinated with OEM design centres
  • Royalty payments flow to OEMs based on engine type and power
  • Product mix decisions are made jointly with OEMs

These relationships are stable and long-term; HHI-EMD has been a MAN B&W licensee for several decades.

Internal vs export volume

A significant portion of HHI-EMD’s output goes to external customers (non-HD Hyundai shipyards). The export volume is large enough that HHI-EMD’s order book includes many ships not built by HD Hyundai’s own yards. This reflects the limited number of license-builders available globally and HHI-EMD’s scale advantages.

Vertical integration

The integration of HHI-EMD with HD Hyundai’s shipyards provides both customers and risks:

  • Strengths: scale economies, supply chain proximity, joint engineering with shipbuilding
  • Risks: HD Hyundai’s shipyard order book affects engine demand directly; concentrated demand among related companies

For external customers, the HHI-EMD relationship works because the engine division operates somewhat independently of HD Hyundai’s shipyard scheduling.

Industry significance

Production concentration

The fact that one company (HHI-EMD) builds so many of the world’s marine engines is itself significant for global industry resilience:

  • Critical-path supplier: large container ship and tanker delivery schedules depend on HHI-EMD output
  • Geographic concentration: production is in Korea; major disruption (geological, political, economic) would affect global shipping
  • Engineering knowledge concentration: a substantial fraction of marine diesel engineering expertise resides at HHI-EMD

Engineering capability

HHI-EMD is not a passive license-builder. The company invests in:

  • HiMSEN R&D (the in-house brand competes directly with Wartsila, MAN, Daihatsu in the medium-speed market)
  • Production engineering for license-built engines
  • Testing and quality assurance
  • Service and support for delivered engines

Future outlook

Continued growth

HD Hyundai’s strategic plans include:

  • Continued expansion of HHI-EMD capacity
  • Further development of HiMSEN family (including ammonia and hydrogen variants)
  • Maintaining position as world’s largest engine builder

Alternative fuels

HHI-EMD is at the forefront of alternative-fuel engine production. The first commercial deliveries of:

  • ME-LGIA ammonia engines (MAN-ES design)
  • X-DF-A ammonia engines (WinGD design)

are being made by HHI-EMD. Methanol ME-LGIM and X-DF-M variants are also produced.

Korean industrial policy

The Korean government’s industrial policy supports continued investment in marine engine manufacturing as part of broader shipbuilding industrial strategy. This includes R&D subsidies, export-promotion support, and industrial coordination.

See also

Additional calculators:

Additional formula references:

Additional related wiki articles:

References