BRP ROTAX 914 Series, Руководство оператора

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7.2) Cooling system
System Overview
The cooling system of the engine is designed for liquid cooling
of the cylinder heads and ram-air cooling of the cylinders. The
cooling system of the cylinder heads is a closed circuit with an
expansion tank.
Coolant flow
The coolant flow is forced by a water pump, driven from the
camshaft, from the radiator to the cylinder heads. From the top
of the cylinder heads the coolant passes on to the expansion
tank. Since the standard location of the radiator is below engine
level, the expansion tank located on the top of the engine allows
for coolant expansion.
Expansion tank
From the expansion tank the coolant is sucked back to the
water pump. In common installations the coolant passes a radi-
ator in between. Additionally the expansion tank is closed by a
pressure cap (with excess pressure valve and return valve). At
temperature rise of the coolant the excess pressure valve
opens and the coolant will escape via hose at atmospheric
pressure. In common installation this hose is connected to an
overflow bottle. This overflow bottle allows the coolant to be
sucked back into the cooling circuit as the engine is cooling
down.
Coolant tempera-
ture measuring
The coolant temperature sensor is located on cylinder head 4
(Applicable for engine S/N with Suffix-01).
2
3
1
4
09152
Figure 4: Cooling system (symbolic)
1
Expansion tank
2
Pressure cap
3 Radiator 4 Overflow bottle
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August 01 2019 BRP-Rotax Effectivity: 914 Series
Rev. 0