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7-2 ENGINE
7-2-l CYLINDER and CRANKCASE
The cylinder and the crankcase of the engine are of an one-piece aluminum die-cast design. The cast iron cylinder liner is
cast-fitted inside the cylinder. Both the intake and exhaust ports are positioned at the lateral side of the cylinder and these
ports are formed by using a mold with die-cast cores. The crankcase has its joint face located on the generator side.
7-2-2 MAIN BEARING COVER
The
main bearing cover is aluminum die-cast and is mounted on the generator side. By removing the main bearing cover.
the interior of the engine can be inspected.
7-2-3 CRANKSHAFT
The crankshaft is constructed of forged carbon steel. The crankpin is induction-hardened and has a pressure-fitted crank
gear located on the generator side of the engine.
7-2-4 CONNECTING ROD and PISTON
The connecting rod is constructed of forged aluminum alloy with both the major and minor ends utilized as bearings.
The oil scraper and cap for the major end are cast together. The aluminum alloy casting piston has two compression rings
and one oil ring.
7-2-5 CAMSHAFT
The camshaft is constructed of special cast iron and has intake and exhaust valve drive cams. each of which engages with the
cam gear. An exclusive aluminum alloy is used on each end of the camshaft in the place of bearings.
7-2-6 VALVE ARRANGEMENT
The intake valve is installed at the oil port side and the exhaust valve at the generator side.
7-2-7 CYLINDER HEAD
The cylinder head is die-cast aluminum and has Ricardo type combustion chamber featuring greater volume capacity for
improved combustion efficiency. For easier spark plug maintenance. the cylinder head is positioned at an angle to allow
greater access.
7-2-8 GOVERNOR
The centrifugal weight type governor
ensures
constant engine speed, regardless of load fluctuations (the governor is mecha-
nically linked to the governor drive gear).
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