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Thermostat Housing Assembly for ENGINE ADA Specifications:
BGA# |
TU NO. |
Application/Specification |
CT5507 |
B54EF |
AUDI ENGINEADA ENGINE SIZE: 1595 |
Thermostat is a thermostat device, usually containing a temperature sensing component, by expansion or contraction to open, turn off the cooling fluid flow, based on the temperature of the cooling liquid level automatic adjustment into the radiator water, change coolant circulation scope, to adjust the cooling capacity of the cooling system.
The thermostat is mainly the wax type thermostat, by its internal paraffin by thermal expansion and contraction principle to control the cooling fluid circulation way of. When the cooling temperature is lower than the prescribed value, the thermostat sense temperature in refined paraffin wax is solid, the thermostat valve under the action of the spring off the channel between the engine and radiator, cooling fluid through the pump returns to the engine, within the engine cycle. When the coolant temperature reaches the set value, paraffin began to melt gradually become liquid, the volume increases and pressure rubber tube, so that the contraction, the contraction of the push rod to the upward thrust, push rod, the valve down reverse thrust open the valve in the rubber pipe. When the coolant through the radiator and the thermostat valve after the pump back to the engine, proceed big circulation. Most of the thermostat is arranged in the cylinder head out of the water pipe, such advantages are simple structure, easy to discharge the bubbles in the cooling system, the disadvantage is that the thermostat at work often open and close, resulting in oscillation phenomenon.
When the engine operating temperature is low (below 70 DEG C), automatic closing the passage leading to the radiator thermostat, and open the pathway leading to the water pump, cooling water flowing from the water jacket directly through a hose into the pump and the pump into water jacket which is recycled, due to the cooling water not scattered by heat exchanger, can make the engine work temperature rises rapidly. The cycle route known as the small circulation. Engine operating temperature is high (more than 80 DEG C), thermostat automatically shut down the pathway leading to the water pump, and opening the passage leading to the radiator, flowing from the water jacket cooling water radiator again from the pump into water jacket, increased the intensity of the cooling, to prevent the engine from overheating. The cycle route said big circulation. Engine operating temperature between 70~80 degrees C, large and small cycle exists at the same time, that part of the cooling water to carry out a large cycle, while the other part of the cooling water for small cycles.
Thermostat is in the temperature of the car has not reached the normal temperature before in the closed state, then the engine coolant pump returns to the engine, within the engine cycle to allow the engine to heat quickly. When more than normal temperature can be opened, so that the coolant through the radiator loop of the whole tank to carry out a large cycle, so as to quickly heat.
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