DEUTZ - Air cooled diesel engines

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DEUTZ - 912 air cooled diesel engines

These are the characteristics:

Air-cooled 3-, 4-, 5-, 6-cylinder naturally aspirated in-line-engines.

Direct injection.

Advanced injection and combustion system.

PTOs via gear, V-belt and crankshaft.

Extremely compact design.

High torque at low speeds.

Modular system with single cylinder arrangement and high degree of parts commonality.

Customized component system with many different peripheral parts.

Cold-starting ability even under extreme climatic conditions.
DEUTZ air-cooled diesel engine

Dimensions

Engine	A	B	C	D	E	F
F3L912 mm	589	679	796	329	268	108
F4L912 mm	719	679	796	329	268	88
F5L912 mm	866	679	833	329	305	88
F6L912 mm	996	679	806	329	278	88

Engine description

Cooling system: Air-cooled with integrated axial-flow blower
Crankcase: Grey cast iron
Cylinder head: Aluminum single cylinder heads
Valve arrangement/timing: Overhead valves in the cylinder head, one inlet and one exhaust valve per cylinder, actuated from gear-driven camshaft via tappets, push-rods and rocker arms
Piston: Three-ring piston: two compression rings and one oil scraper ring
Piston cooling: Oil spray via nozzle
Crankshaft: Nodular cast iron with integrated counterweights
Connecting rod: Drop-forged steel rod, diagonally split
Main and big end bearings: Ready-to-install bi-metal plain bearings
Camshaft: Steel, seated in bi-metal bearing on the blower side
Lubrication system: Forced-feed circulation lubrication with rotary pump which feeds lubricating systems
Engine oil cooler: Integrated aluminum cooler
Oil cooler thermostat: Oil cooler flow thermostatically controlled on engines with heating system
Lube oil filter: Paper-type micro-filter as replaceable-cartridge full flow filter
Injection pump/governor: In-line injection pump with mechanical centrifugal governor
Injection nozzle: Five-hole-nozzle
Fuel filter: Replaceable cartridge
Starter motor: 12V; 2,7 kW (Standard)
Alternator: Three-phase alternator, 14 V; 55A (Standard)
Options: Intake manifold connections, exhaust manifold connections, compressors, hydraulic pumps, engine mounts rigid and flexible, oil pans casted in self supporting design (3-, 4- and 6-cylinder engines), SAE 1/2/3/4 flywheel housings, three-phase alternators 12 and 24 Volt, integrated hydraulic oil cooler, cooling fans controlled by exhaust thermostat

DEUTZ air-cooled diesel engine

Technical data

Engine type	F3L912	F4L912	F5L912	F6L912
Number of cylinders	3	4	5	6
Bore/stroke mm	100/120	100/120	100/120	100/120
Displacement l	2.827	3.770	4.712	5.660
Compression ratio	19	19	19	19
Max. rated speed rpm	2500	2500	2500	2500
mean piston speed m/s	10	10	10	10
Power to ISO 3046 kW	38	51	65	70
at speed rpm	2350	2350	2300	2300
mean effective pressure bar	6.84	6.90	7.20	6.45
Max. torque Nm	176	238	307	364
at speed rpm	1450	1450	1450	1450
Minimum idle speed rpm	650	650	650	650
Specific fuel consumption g/kWh	221	220	223	222
Weight to DIN 70020, part 7A kg	285	320	405	440