550 HP air cooled

Diesel engines for industrial applications produced for over 20 years.

Industrial signifies strong, reliable; this means to operate at any temperature and in all environmental conditions, even without controls.

"Industrial design" means to extend even more to every customer the safety margin that the most severe end user has imposed for his particular use.

Air cooling, in the history of the thermal engine, has been applied in the most diverse sectors: from single cylinder motorcycle engines to the sophisticated drive units for the Le Mans 24 hours, from small agricultural engines to the high power engines to drive industrial machines and equipment, and right up to the complicated radial aviation engines.

Depending on the case, one of the special characterics of this type of cooling is chosen and exploited: the simplicity, reliability, reduced maintenance, guaranteed function even under critical conditions.

With air, therefore, one can cool everything as long as one knows the key points of every application and the critical points of the engine.

From the first beginning of diesel engines story, air cooled units existed.

The most powerful diesel in the world, always with this type of cooling is still in the 90's the V.12130 I-S of 550 HP, that is placed at the top of the series which we present in this catalogue.

technological renovation

Strenght, longevity and reliability, superior to any other realization on the market, remain the prime objectives of this project.

For this reason, after a long practical experience, technological progress has not changed the basic structure of this family.

In accordance with a direction that stays within the basic objectives of the product policy, the new engine series mantains unchanged even the principal morphological characteristics that form part of the modular and interchangeable concept.

All the design attention has been concentrated in the renewal of the active parts, bringing to light simultaneously all the recent developments in diesel engine tecnology, that have received a decisive contribution from experience and research.

Apart from having redesigned all the parts, relative to fluid intake, to increase flow and turbolence, below are outlined the main changes that characterise the new project.

the injection pump uses larger diameter plungers which increase the injection rate, whilst the injectors, reducing to almost zero the sac volume, obtain a major reduction in the incombust exhaust gas.

the pistons have the combustion chamber re-proportioned in order to suit the new air flow and turbolence; a new profile and a new ring layout give longer life and less oil consumption. In the turbocharged engines, around the combustion chamber, there has been inserted a toroidal channel for cirulation (injected from a spray jet placed in the block), hence one guarantees efficient cooling of the upper part of the piston and protection of the piston rings even in the case of over-heating.

the valves are made of a new material that has better heat and wear resistance, whilst the collet groove system enables the valve to rotate freely, for uniform seat wear.

the valve guides are protected by an anti-grip/wear surfac treatment, whit optimized clearance so as to reduce oil consumption and valve tainting at idle.

the turbines in the turbocharged engines are of the latest type and enable the increase in power with the stabilization of specific consumption at lower levels.

the crankshaft , as a consequence of the greater power obtained from the new thermodinamics, has its geometry increased and is subject to a heat treatment which exalts the fatigue resistance.

the speed governor (for generator set versions) is an electronic type. It offers the possibility of "O" state with greatly reduced response time and eventual addition of more engines in parallel.

general features

crankcase: high strenght cast iron monoblock, divided into compartments by side walls into which are seated the main supports.

cylinders: centrifuged perlite cast iron and finned with "Plateau" surface finish. Singular, extractable and interchangeable.

heads: singular as the cylinders, cast iron and finned.

crankshaft and main bearings: the crankshaft forged in steel, heat treated and surface hardened with a nitride treatment. Main bearings are trimetallic with antifriction covering.

connecting rods: flanked type, forged in steel and heat treated, with big end bearings in trimetallic material having a high strenght layer for high loads.

pistons: cast in aluminium alloy with toroidal cooling channel, in which flows oil sprayed from a jet in the block.

timing drive: all the auxiliaries are gear driven. A power take off, up to 50 HP, is available on the front cover.

injection: the injection pump is monoblock type and contains the governor (mechanical or electronic) and the fuel pump. An automatic advance variator is mounted on the injection pump centerline.

lubrication: forced feed by a gear driven pump, a maximum pressure valve is mounted in the circuit.

cooling: a gear driven axial fan activates the air circulation for efficient cooling of cylinders, heads and oil exchangers (and air to air exchangers in intercooled engines).

starting: by way of an electric starter motor. It is possible to mount an air compressor or hydraulic starter.

turbocharging: is obtained by the use of two exhaust gas driven turbochargers. The "I" versions are supplied with intermediary air cooling of the turbocharger by way of an air to air heat exchanger.

standard supply conditions

The standard engine version, comprising only the essential parts (heads, pistons, block, crankshaft, etc.) is completed by one or more obligatory variables depending upon the engine application.
The variables which by group are obligatory, dress and complete the base entity making the engine ready for the pre-chosen use, are subdivided into the following main groups:
flywheel housing - controls - air cleaners - starting and electrical installation - injection pump.

accessories

The accessories which can be fitted to the engine, have been studied to satisfy the market needs where the engine is destined and include for example generating sets, water pumps, self propelled heavy vehicles and all the applications where a strong and reliable unit is required.
Principal accessories are: rubber couplings - clutches - power take offs for hydraulic and compressor pumps - pulleys - hot air shrouds - special supports.