Can the thermostat on the car be removed?
In fact, the car thermostat can automatically adjust and control the valve when the engine coolant enters the radiator water flow path according to the temperature of the coolant, so as to ensure that the engine works within a suitable temperature range, and save fuel. effect. The working principle of the thermostat: The thermostat is mainly a wax thermostat. The paraffin inside it opens the thermostat valve through the principle of thermal expansion and contraction, so that the cooling fluid flows from the engine to the radiator to cool down. When the temperature of the coolant is lower than the specified value (about 70 ℃ or less), the refined paraffin in the thermostat body is solid, and the thermostat valve closes the passage of the coolant into the radiator under the action of the spring. Returning to the engine via the water pump, the coolant is only in a small cycle. The flow direction of the small circulating coolant is: engine water jacket → hose → water pump → engine water jacket → thermostat valve is closed, which is called small circulation. When the temperature of the coolant reaches the specified value (above 80 ℃), the wax gradually melts into a liquid, the volume increases accordingly, and the rubber tube is forced to contract, while the online hose is compressed and the push rod is pushed upward to form a thrust. The rod has a downward thrust to the valve, causing the valve to open. At this time, the coolant flows through the radiator and the thermostat valve, then flows back to the engine through the water pump, and enters the large cycle. The flow direction of the large circulating coolant: water jacket → radiator → water pump → water jacket ~ thermostat valve is opened, which is called a large circulation. Effects after removing the thermostat: The thermostat's function is to shut down before the temperature of the car has reached the normal temperature. At this time, the engine coolant is returned to the engine through the water pump, and a small cycle in the engine is performed to make the engine fast. Warm up. When it exceeds the normal temperature, it can be opened, allowing the coolant to circulate through the entire radiator circuit of the water tank, thereby quickly dissipating heat. The previous vehicles are easy to open, and often use the method of removing the thermostat to make the cooling water enter the large cycle to cool down. Now the vehicle uses coolant, which is not easy to open, and the thermostat is rarely removed to cool down. If the thermostat is removed, the coolant will often circulate in a large circulation state. Because the coolant is cooled down by the radiator, it is difficult for the engine to reach the normal temperature of the engine in a normal time, and the temperature rise is very slow. Especially in the cold winter, it takes a long time for the vehicle to warm up to the normal operating temperature of the engine. In this way, the atomization of the injected fuel is poor, the combustion of the engine mixture is not sufficient, it is easy to produce carbon deposits, and the power cannot be fully exerted normally. . The three-way catalyst has a slow temperature rise, making it difficult to meet emissions standards. If you need to use warm air, not only is the temperature of the heater not enough, but it has increased the temperature of the engine. If the engine has not reached the normal temperature, it is eager to drive the car. Because the temperature of the engine oil is not thick enough, the fluidity is poor, and the lubrication between the running parts of the engine is poor, causing the wear of the parts to be greater than the normal temperature. This is also the reason why many vehicles have been seen in the past, and there is a cloth curtain hanging in front of the radiator grille in winter → The purpose is to make the engine work at normal temperature at the right, and have a thermal insulation effect.