In the north of China, drivers often remove the car’s thermostat in winter. The reason is because the thermostat, when the temperature is low (especially in starting) small circulating cooling water, the water in the tank is basically in a static state easily frozen, the tank cracking caused by severe.
1, remove the thermostat will make the cooling water temperature out of control
When designing the cooling system, the maximum heat dissipation capability is the basis to ensure the engine in the most difficult condition, that is, the load is big, the speed is low, the outside temperature is high, can obtain the reliable cooling. It is clear that in the case of low load, high speed, low external temperature, the heat capacity is too large, so that the engine is too cold. So it needs a device to adjust the cooling intensity, through the change of Baotou North Benz parts of the radiator air flow and cooling water circulation path to achieve the purpose of regulating the cooling intensity, ensure that the engine work in the range of 80 DEG to 90 DEG C in the most suitable. The cooling water circulation route changes, generally by the thermostat according to the temperature change to automatic control when the cooling water is lower than 70 DEG C, cooling water without heat circulation; when the cooling water temperature is higher than 80 DEG C, the radiator and large circulation. It is clear that the cooling water temperature is low, the cooling water to the radiator so it is bound to cause the engine often at low temperature.
2, after the removal of the thermostat, the engine will make the economy and durability of sharp changes
Because there is no thermostat, Baotou North Benz engine accessories often at low temperature, the thermal state of the engine parts, increased wear, increased fuel consumption. According to the experimental results, it is indicated that the wear of the engine can be increased by 30 to 40 times in the low temperature condition of 40 degrees C to 50. Greatly shorten the service life. Its reason:
(1) due to low temperature, resulting in excessive wall heat, reduce the gas temperature in the cylinder pressure, the thermal efficiency will increase fuel consumption.
(2) the evaporation and atomization of the fuel are poor, which bring difficulties to the formation of the mixture, so that the mixture becomes thicker and the combustion is incomplete, and a large amount of fuel is lost. Due to increased fuel consumption, power down, serious when mixed in the fuel gas condensate part on the cylinder wall, wash oil film on the cylinder wall, into the crankcase, dilute the engine oil, resulting in increased wear parts.
(3) increase the viscosity of lubricating oil at low temperature, poor liquidity, thereby increasing the motion of crankshaft and bearing and piston and cylinder wall etc. friction resistance, make the power decline, increased fuel consumption.
(4) generated by the combustion of water vapor, due to low temperature and condensation in the cylinder wall and combustion products with strong corrosive agents, such as sulfuric acid, nitric acid, carbonate, has strong corrosive effect on the cylinder wall, piston and piston ring parts.
3, with the section of the thermostat operation of the measures to avoid freezing water tank
The wear of the cylinder in the north of Baotou is one of the important bases for the use of the unit to repair the engine. It is affected by the conditions of use, maintenance level, the direct impact of the driver’s operation technology, which is crucial to the impact of temperature. In order to prolong the service life of the engine, the engine is always in good technical condition. And with the thermostat in the winter how to avoid freezing water tanks, the general practice is that:
(1) the vehicle is parked in the thermal insulation garage at night.
(2) the vehicles parked in the open air, the water in the tank clean.
(3) before starting the boiling water, especially in the open air parked vehicles, add boiling water, the release, once again add boiling water, in order to preheat the engine.
(4) when the shutter is closed, the heat insulation curtain is closed to reduce the air flow rate of the radiator.
(5) after starting the engine to be small to preheat the engine, so that the engine temperature gradually increased, the temperature reached 60 degrees Celsius to start at the top.
(6) adding antifreeze in the cooling water.