Product Description; Gas Spark-Ignition Engine With Accessories - Viessmann VITOBLOC 200 Technical Description

Product description

2
Product description
The cogeneration module consists of a wide variety of
subassemblies and components that this chapter will
explain to you. The subassemblies and components
are part of the scope of delivery of the cogeneration
module.
2.1
Gas spark-ignition engine with
accessories
2.1.1 Gas spark-ignition engine
The gas spark-ignition engine is operated as an
internal combustion engine with turbocharging and
two-stage mixture cooling with an air ratio of lambda ≈
1.6.
A compressed oil jet cools the piston heads. The
exhaust gases are drained through a dry exhaust gas
collector pipe.
Components
The crankcase is cast in one piece together with the
cylinder block. The 2 parallel cylinder supports with
6 cylinders each (V arrangement) form the close of
the crankcase. The cylinder liners are wet-running,
replaceable and made of cast iron. The gearbox is
arranged on the flywheel side of the crankcase. It
includes the crankshaft seal and drive gears for the
camshaft and oil pump. The crankshaft made of
chromium-molybdenum steel is forged in the forging
die and nitride hardened. It is lodged at the end
and between the cylinders. The crank pins are
intended for lodging one connecting rod each.
The bearing shells are made of lead/bronze with a
lead/indium covering and they have a steel back. The
connecting rods are also forged of chromium-
molybdenum steel in the forging die and they are
made slanted.
The pistons are made of a low-expansion aluminium
alloy. The form of the piston crown creates an open
combustion chamber. Three grooves are embedded
into the piston crown for the piston rings. The
camshaft is made of a cast iron/chromium alloy with
hardened cams and lodged at the ends and between
the pistons.
VITOBLOC 200 EM-401/549 / EM-363/498
It is arranged lying low in the crankcase. The cylinder
heads made of cast iron for each cylinder are
fastened onto the crankcase. They have cooling
ducts, holes drilled for holding the spark plugs and
one intake and exhaust valve per cylinder. The
valves mounted to be suspended have replaceable
valve bushings.
2.1.2 Engine lubricating oil system
The engine is lubricated via a pressure circulating
lubrication system.
The oil is pumped via gear-driven oil pump from the
oil sump through the oil cooler that is designed as an
oil/water ribbed tube cooler. The lubricating oil is
purified through an oil filter cartridge with a paper
insert in the main flow. From there, the filtered oil is
distributed over various oil channels.
The oil lubricates the crankshaft bearings, the
connecting rod bearings, the piston pins, the camshaft
bearings and the rocking arms. The gears are
lubricated in the gearbox with splash oil within the
crankcase. The crank space ventilation is connected
to the combustion air suction via oil screen.
Components
The engine lubricating oil system consists of the oil
sump, an oil pump, and oil filter with a paper insert
and various oil channels.
Special characteristics
The crank space ventilation is connected to the
combustion air suction via an oil screen.
ESS Energie Systeme & Service GmbH 7