2.2. Engine Type The Engines DE12T, DE12TI, DE12TIA, DE12TIS are in-line vertical water-cooled 6-cylinder four-stroke diesel engines with direct injection. DE12T is turbo-charged engine, and DE12TI, DE12TIA, DE12TIS model is turbo-charged and inter-cooled engine. 2.2.1. OMEGA combustion bowl The OMEGA combustion bowl is a unit designed to perform high efficien- cy, low emission combustion. As the rim around the combustion bowl port of the upper of the piston has been machined in a smaller size than the interior of the combustion bowl, strong swirl is produced in the combustion bowl and strong squish flow makes the fuel be mixed more sufficiently with air.
Due to the application of OMEGA combustion system and optimal uti- lization of intake and exhaust port configuration within the cylinder head, the DE12 series diesel engines dis- charge very low level of hazardous exhaust gases such as smoke, nitro- gen oxide, hydrocarbon, or carbon monoxide and thus ensure high per- formance and low fuel consumption. EA8M1001 2.2.2. Cylinder block The cylinder block is a single piece of alloy cast iron. To increase its stiffness, it is extended to a level below the crankshaft center line.The engine has replaceable dry cylinder liners and indi- vidual cylinder heads with struck-in valve seat rings and replaceable valve guides, 2.2.3.
Piston con-rod / crankshaft The forged crankshaft is a ingrate type (Counterweight is integrated with crank shaft body). Radial oil seal on crankshaft and flywheel are provided to seal the flywheel housing inside penetrations. The con-rods (connecting rods) are die-forged, diagonally split and can be removed through the top of the cylinders together with the pistons. Crankshaft and connecting rods run in steel- backed lead bronze ready-to fit type bearings. - 17 - TECHNICAL INFORMATION