Hatz D-Series 1D90 Single-Cylinder Air-Cooled Diesel Engine

The single-cylinder diesel built for high output and hard use

The Hatz 1D90 is the top model of the Hatz D-Series, a range of air-cooled, single-cylinder, four-stroke diesel engines. Hatz states that with 11.2 kilowatts the 1D90 is the highest-output single-cylinder diesel engine in the world. The series is aimed at demanding duty, from very low temperatures to tropical climates, and the engines can be configured with up to three different power take-offs, which gives machine builders more options than a typical engine in this class.

The data sheet covers seven versions: 1D42, 1D50, 1D81, 1D81C, 1D90E, 1D90 and 1D90V. The 1D90E belongs to the Hatz E1 family with electronic injection and a standard CAN J1939 interface, and the 1D81C is the Silent Pack version in a sound-insulated capsule. The 1D90V has a vertical crankshaft; the other engines use a horizontal one.

Technical specifications

Quiet running, Silent Pack and emissions

Compensation weights on the flywheel-side crank arm and balance weights cast into the flywheel are used for smooth running, and counter-rotating balance shafts are available as an option for complete first-order balancing. The Silent Pack is a sheet-metal capsule with structure-borne sound insulation; Hatz quotes a noise reduction of up to 12 dB at a distance of 7 m, with all control and service points reachable from outside and the silencer housed in a separate capsule over the flywheel.

All engines are sold at the highest emission level Hatz offers even where the law does not require it. The 1D90E meets EPA Tier 4 final and EU Stage V, and Hatz offers it with an optional passive diesel particulate filter for EU Stage V in defined applications. For markets with less regulation the data sheet lists additional speed ranges from 1500 to 3600 rpm depending on model.

Choosing between the D-Series versions

Select by required power at the working speed first. The data sheet gives IFN power for intermittent loading per ISO 3046-1 separately for variable speed and constant speed, with extra rows for less regulated markets, and notes that power falls about 1 percent per 100 m above 100 m altitude and about 4 percent per 10 degrees C above 25 degrees C. Power taken by the charging alternator must be added to the load.

Then confirm the power take-off arrangement, starter voltage (12 V at 2.0 kW or 24 V at 3.0 kW), crank-handle or electric start, mechanical or electronic control, the emission certificate for the destination and the installation dimensions and permitted inclination of 25 to 30 degrees depending on type. Detailed drawings can be obtained from the manufacturer.

How the Hatz 1D90 works

A single piston burns diesel fuel in one cylinder and turns the crankshaft. Cooling air from a fan on the flywheel passes over the cylinder, so the engine needs no water. The crankshaft drives the machine through a power take-off.

Where the Hatz 1D90 is used

• Generator sets
• Pumps
• Compressors
• Construction machines
• Machine builders needing a compact diesel

Selection checklist for the Hatz 1D90

• Power required
• Speed
• Crankshaft direction
• Power take-off
• Starter voltage
• Battery size
• Noise limits
• Mounting space

Installation, commissioning and maintenance notes for the Hatz 1D90

Mount the engine on a firm base with free air flow around it. Fit the battery, the fuel line and the exhaust. Check the oil level, the filters and the cooling air path at regular intervals.

Requesting a quotation for the Hatz 1D90

Please send the power needed, the speed and the application. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

Hatz 1D90 engine type

It is an air-cooled four-stroke diesel engine.

Hatz 1D90 cylinders

It has one cylinder with direct injection.

Hatz 1D90 series

It belongs to the Hatz D-Series.

Hatz 1D90 output

Hatz states that 11.2 kW is the highest output of any single-cylinder diesel.

Hatz 1D90 versions

The data sheet covers seven versions.

Hatz 1D90 version list

They are the 1D42, 1D50, 1D81, 1D81C, 1D90E, 1D90 and 1D90V.

Hatz 1D90E version

The 1D90E uses electronic injection and a CAN J1939 interface.

Hatz 1D90 Silent Pack

The 1D81C is the Silent Pack version in a sound-insulated capsule.

Hatz 1D90V version

The 1D90V has a vertical crankshaft.

Hatz 1D90 crankshaft

The other versions have a horizontal crankshaft.

Hatz 1D90 power take-offs

The engine can be configured with up to three power take-offs.

Hatz 1D90 bore and stroke

The 1D90 has a 104 mm bore and an 85 mm stroke.

Hatz 1D90 displacement

The 1D90 group displaces 0.722 litres.

Hatz 1D90 power rating

The 1D90 gives 11.0 kW at 3000 rpm in the variable speed rating.

Hatz 1D90 weight

The 1D90 weighs 106 kg with electric start.

Hatz 1D90 dimensions

The 1D90 measures 373 x 472 x 599 mm.

Hatz 1D90 starter

The starter is 12 V at 2.0 kW or 24 V at 3.0 kW.

Hatz 1D90 battery

Battery capacity is 45 to 88 Ah at 12 V and 36 to 55 Ah at 24 V.

Hatz 1D90 idle speed

The lowest idle speed is about 800 rpm.

Hatz 1D90 balance

Balance weights are cast into the flywheel for smooth running.

Hatz 1D90 climate range

The series is aimed at duty from very low temperatures to tropical climates.

Hatz 1D90 noise reduction

The Silent Pack version cuts noise by up to 12 dB at 7 m.

Engine records for the Hatz 1D90

Record the running hours, the oil changes and the date of each service.

Choosing the right Hatz 1D90 version

Choose the version from the power, the crankshaft direction and the noise needs.

Documents and quotation

The manufacturer data sheet is attached to this page for download. Seven Star LLC is an independent supplier in Muscat; send the model, quantity, power take-off and starting option and we will request a quotation. Availability depends on the model. See also Motors, Pumps and Turbines.