Design and Function
27
Carefully read these Operating Instructions before starting any work!
This is especially valid for the chapter on General Safety Instructions
and the safety instructions in each of the chapters.
4
Design and function
4.1
Engine application fields
The 8- and 12-cylinder engines described here are liquid-cooled 4-stroke petrol engines with exhaust gas
turbocharger and mixture cooling.
4.2
Engine design and engine equipment
Engines E3268 LE212, E3268LE222 and E3262 LE202, E3262 LE212 are 8- or 12-cylinder gas engines
with turbocharger and mixture cooling.
Split crankcase, wet cylinder liners made of highly wear-resistant special centrifugal casting, aluminium
piston with cooling duct for piston cooling. Single cylinder heads with shrink-fitted valve seats and pressed-
in valve guides. 4 valves per cylinder. Valve control via central camshaft, roller tappets, tappet push rods
and rocker arms (OHV).
Charge mixture system
The charge mixture system consists of the charge mixture cooler, the charge mixture manifolds, the throttle
valve and the air distributor pipes.
Gas supply line
The gas supply line - consisting of ball cock, gas filter, solenoid valves, gas pressure regulator, gas mixer
and air filter - is not supplied by MAN.
Engine Lubrication
Force-feed lubrication with two lubrication oil pumps for crankshaft, conrod and camshaft bearings as well
as piston pin sockets, roller tappet and rocker arm.
Oil filtration through oil modules with integrated oil cooler and crankcase breather in main flow. Auxiliary
units such as turbocharger are connected to the engine lubrication oil circuit.
Intake and Exhaust System
Dry exhaust pipes.
For E3268, one exhaust turbocharger; for E3262, two exhaust turbochargers.
The exhaust turbochargers are lubricated via the engine's main flow oil circuit.
The intake air flows through the air filter to the gas mixer and then to the turbocharger(s). The now precom
pressed air/gas mixtures are supplied to the engine after mixture cooling.
