Generalities

GENERALITIES

The engine is of the six 60° V mounted cylinder type in light alloy and has a total cubic capacity of 2492 cm³ with static ignition and injection controlled by a single BOSCH MOTRONIC M 1.7 control unit.

From a dynamic point of view the "V" arrangement and the 60° angle make the engine extremely compact and well balanced.

With a piston stroke of 68,3 mm and a bore of 88 mm, the engine is of the super square type (stroke and bore ratio lower than 1), which permits a better arrangement of the valves and an optimal filling of the cylinders (high volumetric ratio).

The clutch-gearbox-transmission assembly is connected towards the rear of the engine and forms and integral part of the engine.

The engine is installed in the front of the vehicle and is arranged transversally with a 14° inclination forwards. It is supported by "suspended" type attachments and fixed to the body by two supports with flexible damping and to the suspension cross member by a third.

To reduce the shaking of the engine to a minimum, a retaining rod is mounted on the body.

The engine described below conforms to the "USA 83" exhaust emissions limits.

STRUCTURE

Engine block:

a single block in light aluminium and silicon alloy with high mechanical resistance and thermal conductivity. The crankshaft is supported by five main supports.

Grooves in the wall of the engine block permit the passage of the cooling liquid and oil. Jets which spray oil to cool the pistons are located at the base of the cylinders.

Cylinder liners:

these, in cast iron, are of the low-slung type and are directly reached fromthe outside by the cooling liquid for a more rational heat dissipation (humid). The dimensions of the cylinder liners permits the gas to be contained and avoids deformation. The cylinder liners are already coupled with their relative pistons when supplied and are divided into three dimensional classes.

Cylinder heads:

these are of the monolithic type, compact fused in shell of aluminium and silicon alloy. The 47° "V" position of the valves gives the combustion chamber and optimal configuration. Each cylinder head is supported by a camshaft for the intake valves and a system of rods and rocker arms for the control of the exhaust valves.

Oil sump:

this is of light aluminium formed by die-casting and is completely surrounded by anti-lapping panels. A gasket with a silicon rubber insert is fitted between the sump and the engine block.