Reliable Drive Solutions for Mission-Critical Applications
The development and production of high-quality, rugged diesel engines is the technological core competence of Hatz. Engines are developed and manufactured in Germany and are trusted globally for their operational reliability, efficiency, and long service life.
Hatz Defence is the specialist for single- to four-cylinder diesel engines in a power range from 1.5 to 64 kilowatts. Engines are categorized into the Hatz B-, D-, and H-Series and feature their special qualities for every need.
Our Engines Ready For Deployment

B-Series
The Hatz B-Series is optimized for mobile and stationary applications with power requirements up to 8 kW.
D-Series
The Hatz D-Series is engineered for the toughest operating conditions. Delivering up to 11.2 kW, the Hatz 1D90 is the world’s most powerful single-cylinder diesel engine.
H-Series
Compact high-performance 3-/4-cylinder common-rail engines with a power output up to 64 kW.
The portfolio includes air-cooled and liquid-cooled diesel engines categorized into the Hatz B-, D-, and H-Series. Depending on application requirements, solutions range from lightweight compact engines from 1.5 kW to electronically controlled common-rail systems with outputs up to 64 kW.
Our robust and mission-ready engines support troops and critical systems in the field – delivering reliability, safety, and performance when it matters most.
-
Ready For Extreme Climatic ConditionsProven cold-start capability, stable operation at temperatures above +50°C.
-
Ready For CommunicationElectronically controlled E1 variants support CAN J1939 communication protocols, integrated engine diagnostics, variable speed control, and engine protection systems.
-
Ready For NATO FuelsApproved operation with NATO fuels (F63, F34 (JP8), F35 (JP1)), increasing fuel flexibility, and reduced logistical dependencies support modern military energy resilience strategies.
-
Ready For Defence Missions24V military-compatible configurations and customizing for specific tenders possible.
-
Ready For Long OperationAll Hatz engines are designed for maximum durability, low fuel consumption, and simplified maintenance. Top-quality materials and robust production processes ensure long service life even under vibration-intensive and dust-heavy operating conditions.
-
Ready For ComplianceSelected engines fulfill EU Stage V and EPA Tier 4 final emission standards while maintaining compact dimensions and excellent fuel efficiency.
-
Ready For Long SupportSustained spare parts support to ensure long-term operational readiness over the usual military lifecycle.
Hatz B-Series

The Right Solution for Ultra-Compact and Small Applications
Whether optimized for limited installation space, low emissions, quiet operation, or integration into Hatz Digital Solutions, these engines provide reliable, efficient, and future-ready power for a wide range of machines.
The realization of ambitious development goals required numerous technical innovations that continue to distinguish the Hatz B-Series from comparable engines on the market. One example is the patented SCS (Single Cam System), used in the mechanically controlled models. This system actuates both the injection pump and valves using a single cam while also integrating an automatic decompression mechanism – resulting in a compact, efficient, and highly reliable design since 1995.

Benefits
- Air-cooled design for simplified operation
- Compact and lightweight architecture
- Lightweight range extender solution for compact autonomous systems and portable hybrid energy applications
- Low fuel consumption
- IoT and digital integration ready
- Optional emergency recoil start capability
- Optional PMG (permanent magnet generator) integration with 230V AC and 28V or 56V DC inverters
Compact and Powerful
Power output ranges from 1.5 to 8 kW at engine speeds up to 3600 rpm while maintaining low fuel consumption and excellent operational reliability.

Get Connected With E1 Technology
The B-Series models equipped with Hatz E1 technology feature advanced electronic engine management. Here, the proven reliability of the core engine platform is combined with the advantages of state-of-the-art electronics, opening entirely new possibilities in this performance class. Through integrated network capability and CAN-based communication, machine manufacturers and operators benefit from simplified system integration, enhanced diagnostics, real-time monitoring, and improved operational efficiency.
Hatz D-Series

Maximum Single-Cylinder Performance for Demanding Missions
The Hatz D-Series is engineered for the toughest operating conditions. Delivering up to 11.2 kW, the Hatz 1D90 is the world’s most powerful single-cylinder diesel engine. Its compact design, high power density, and proven durability make the D-Series engines ideally suited for defence, security, and other mission-critical applications where reliability and performance are essential.
The D-Series engines can be configured precisely to meet individual application requirements, ranging from a pure core engine solution to a fully equipped high-tech power unit. A wide range of available options allows maximum flexibility for system integration and machine customization. With up to three different power take-offs on a single engine, the D-Series offers exceptional versatility and integration capability – more than virtually any comparable engine in its class.
Typical applications include hydraulic power units, mobile energy systems, military pumps, auxiliary systems, field support equipment, and vehicle-integrated applications.

Benefits
- World’s most powerful
single-cylinder diesel engine - Most robust engine in the market, extremely long life-time
- Extreme durability and continuous-duty capability
- Field-proven under harsh
operational conditions - 1D81C Silent Pack for reduced
acoustic signature by 95 percent - Crankhandle start and/or electric
start with 12 or 24 volts - Electronic diagnostics and engine protection systems for E1 variants
- Flexible installation configurations
High Performance
The Hatz D-Series is available in a power range from 3.3 to 11.2 kilowatts at a maximum speed of up to 3000 rpm.

Reduced Acoustics Signature by 95 Percent
The Hatz D-Series is the first single-cylinder diesel engine family available with the specially developed Silent Pack – an integrated sound-insulated enclosure designed to significantly reduce acoustic emissions. The Silent Pack lowers radiated noise levels by up to 12 decibels at a distance of 7 meters, making it ideal for applications where low acoustic signatures are essential. Its robust sheet-metal enclosure is mounted with structure-borne noise insulation to minimize vibration and sound transmission.

First Fully Electronic and Fully Variable Speed Single-Cylinder Engine
Equipped with Hatz E1 technology, the 1D90E features advanced electronic engine management combined with a core engine platform proven hundreds of thousands of times in the field. For the first time in this performance class, machine manufacturers and operators benefit from fully network-capable solutions based on modern electronic architecture. The integrated ECU and CAN/J1939 communication enable simplified system integration, enhanced diagnostics, real-time engine monitoring, and more efficient operational processes – key advantages for modern defence, security, and mission-critical applications.
Hatz H-Series

High-Performance Common-Rail Engines for Advanced Defence Systems
A groundbreaking downsizing concept formed the basis for the development of the Hatz H-Series, that combines modern common-rail technology, compact design, and exceptional power density for advanced military applications. The result is an exceptionally compact range of turbocharged engines (depending on the variant) delivering up to 64 kW.
They are characterized by smooth operation, dynamic response, and maintenance-friendly design. Their consistently low fuel consumption across a wide load and speed range remains unmatched.
Only premium-quality components are used in the H-series engines, including advanced injection systems and high-precision sensors from globally recognized manufacturers, ensuring maximum reliability and long service life.

Benefits
- Compact high-performance
common-rail engines - Power output up to 64 kW
- Excellent power-to-weight ratio
- Extremely low fuel consumption
- Low noise
- Extremely good performance
at high altitudes - J1939 controlled
- Long maintenance intervals
- Ready-to-integrate OPU solutions
- Optional New Silent Pack for
reduced acoustic signature - Digital connectivity and remote diagnostics capability
Exceptional Power Density
The Hatz H-Series combines proven mechanical robustness with modern engineering. Its durable two-valve-per-cylinder design ensures high efficiency, simplicity, and long service life – ideal for demanding industrial and defence applications.
The Bosch common-rail system with up to 1,800 bar injection pressure delivers dynamic performance, low noise emissions, reduced fuel consumption, and excellent efficiency. With a specific fuel consumption of just 210 g/kWh, the H-Series sets benchmarks in its class.

The Plug & Play Solution
All H-series variants are available as fully tested ready-to-install OPUs (Open Power Units). In addition to the engine itself, essential components such as the air filter, radiator, charge-air cooler (if equipped), hoses, and the complete wiring harness including fuses and relays are already pre-installed and validated by the manufacturer prior to delivery.

The Most Quiet Hatz Multi-Cylinder Engines
Based on the OPU version, the Silent Packs achieve up to 60% lower noise emissions. The powder-coated sheet-metal canopy also provides effective weather and touch protection while maintaining the same approved maximum ambient operating temperature as the OPU version.

Engineered to Perform. Trusted in Mission.
Hatz Defence stands for resilient industrial capability. High in-house manufacturing depth, stable European production structures, and long-term service availability ensure dependable supply chains and operational continuity – increasingly important requirements for NATO procurement programs and military modernization initiatives.
Our solutions are developed with real-world operational scenarios in mind: extreme temperatures, limited infrastructure, fuel variability, long maintenance intervals, and high operational readiness requirements.

