If the original thermostat is removed from the engine, the cooling water will be cooled when the eng

A thermostat installed inside the engine automatically regulates the water temperature of the engine by controlling the amount of coolant circulation. In fact, we can roughly know its function by looking at the name of this component, and the word "section" of "thermostat" refers to the meaning of "saving, saving", which is the same as the throttle pipe on the air conditioning system. So what is the saving?

Naturally, it's the word behind it - temperature.

This leads to its first function, which is to control the coolant in the "small circulation" range when the engine water temperature is low, so that the water temperature of the engine can be quickly increased to the optimal temperature range (90-110). Another function is that when the water temperature rises, the large circulation of the engine is opened, so that more coolant can participate in the heat dissipation work of the engine.

At present, most of the thermostats are paraffin sensors, which use the principle of thermal expansion and cold contraction to control the circulation degree of coolant, when the expansion reaches a certain extent, the thermostat opens the coolant and enters the water tank for heat dissipation, and the large circulation begins; When the temperature is low, the paraffin inside the thermostat is in a solid state, the spring-return thermostat opening is closed, and the coolant inside the engine no longer passes through the water tank, which we call a small circulation. The degree of expansion and contraction determines the size of the thermostat opening, which in turn determines the degree of coolant size circulation. If the thermostat is removed, there is no control, and only the big cycle will be carried out.

Hello, that's for sure, after the thermostat is removed, this part becomes a tee, just like a water pipe, as long as there is no blockage in the place can be circulated. Hope.

It is recommended not to remove the thermostat, because the thermostat makes the engine quickly reach the normal working temperature when the thermostat is cold, and some cars will cause the water temperature to be too low after the thermostat is removed, and the fuel consumption also has a certain impact ......

The thermostat is to control the size of the cycle, when the small cycle is turned off, when the large cycle is turned on, the thermostat is turned on. If the thermostat is removed, there is no control, and only the big cycle will be carried out.

Thermostats. itself should be in a shut-off state at low temperatures, so the engine coolant.

It is a small cycle, so that the working temperature of the engine rises rapidly, to avoid the cold time for too long and the formation of engine wear. If the thermostat is removed, the engine will always be in a state of large cycle, so that the engine operating temperature rises more slowly, so it not only costs oil, but also fuel.

The main function of the cooling system is to dissipate part of the heat absorbed by the heated parts in time to ensure that the engine works at the most suitable temperature state.

When the temperature of the cooling water rises (more than 86), the main valve of the thermostat is opened, the side valve is closed by the bypass hole, and the cooling water flows into the radiator through the main valve for heat dissipation, and then flows to the water pump inlet, and is pressed into the water jacket by the water pump. The large circulation route of the motor cooling water is: water jacket, thermostat main valve, radiator upper water chamber, cooling pipe, radiator lower water chamber, water pump inlet, water pump, water jacket.

When the cooling water temperature is low (less than 76), the main valve of the thermostat is closed, the bypass valve is opened, and the cooling water does not flow through the radiator but flows through the bypass valve of the thermostat and flows directly back to the water inlet of the water pump, and is re-pressed into the water jacket by the water pump. At this time, the circulation of cooling water in the cooling system is called the small circulation of cooling water. The cooling water small circulation route is:

Water jacket, thermostat bypass hole, bypass pipe, water pump inlet, water pump, water jacket.

Tiles, broken cylinder gaskets, rising water temperatures?

Small circulation means that the engine coolant does not circulate through the water tank, but only through the storage kettle in the cylinder head line to complete the alternation of hot and cold. The large circulation is when the temperature of the cooling water is higher than 80 degrees Celsius, the main valve of the thermostat is fully open, the side valves are all closed, and the cooling water flows into the radiator, and the cooling intensity is large.

Automotive cooling system size cycle.

When the coolant temperature is lower than 80 degrees Celsius, the paraffin wax becomes a solid state, the spring presses the valve on the seat, the valve is closed, and the coolant flows into the air conditioner radiator inlet pipe from the bypass port without flowing into the radiator, that is, a small circulation is carried out, and the cooling intensity of the cooling system is small. When the temperature of the coolant is higher than 80 degrees Celsius, the paraffin wax melts into a liquid state, its volume expands, forcing the rubber sleeve to shrink, the upper end of the reverse push rod can not move up because it is fixed, the rubber sleeve pushes the shell to overcome the elastic force of the spring and move downward, open the valve, most of the coolant can enter the radiator along the radiator inlet pipe for large circulation, a small part of the coolant is still in small circulation, and the cooling intensity of the cooling system increases.

The cooling system switches to a large cycle controlled by a thermostat, whose paraffin wax melts into a liquid at high temperatures and supports the rubber structure inside. After the prop is up, it will block the small circulation pipe and open the passage of the large circulation. Achieving this requires a coolant of about 80 degrees Celsius, at which point the body temperature is already reasonable.

The size of the cooling system is circulated Thermostats are often used to control the flow of cooling water through the radiator. The thermostat is installed in the cooling water circulation channel (generally installed at the outlet of the cylinder head), and automatically changes the water circulation flow route according to the engine load and water temperature, so as to adjust the cooling intensity of the cooling system.

When the engine is working in a normal thermal state, that is, the water temperature is higher than 80, the thermostat valve opens the passage to the radiator, and at the same time closes the bypass pipe to the water pump, and the cooling water all flows through the radiator to form a large circulation.

When the cooling water temperature is lower than 70, the thermostat valve closes the passage to the radiator, and the bypass pipe leading to the water pump is opened simultaneously, and the water in the water jacket can only flow out through the bypass hole and enters the water pump through the bypass pipe, and is pressed into the engine water jacket by the water pump again, the cooling water does not flow through the radiator at this time, only carries out a small circulation between the water jacket and the water pump, so as to prevent the engine from being subcooled; When the cooling water temperature of the engine is in the range of 70 to 80, the passage to the radiator and the bypass pipe to the water pump are in half.

Summary. Under normal circumstances, the size cycle in the engine cooling system is controlled by the thermostat, when the thermostat is not on, the engine is in a small cycle state, and when the thermostat is on, the engine is in a large cycle state.

In the engine cooling system, what controls the circulation route of the size of the cooling coefficient?

Hello, I have seen your inquiry, please wait for a moment and answer it for you immediately.

Okay, no.

Under normal circumstances, the size of the cycle in the engine cooling system is controlled by the thermostat, when the thermostat is not open, the shipping object moving macro is in a small cycle state, and the engine is in a large circulation next to the skin liquid state when the thermostat is on.

The types of automobile engines are divided according to the form of cylinder arrangement.

Inline, V-column, W

The thermostat is one of the essential components of the traditional cooling system, and its main function is to control the flow of cooling water.

1 Small cycle: When the engine water temperature is lower than 76, the main valve of the thermostat is closed, the bypass valve is opened, and the cooling water channel from the cylinder head to the radiator is cut off. The cooling water flows out from the water jacket of the cylinder head, enters the water pump through the bypass valve and bypass pipe of the thermostat, and is sent to the water jacket of the cylinder block through the water pump.

Since the cooling water is not dissipated by the radiator, the engine temperature can be increased rapidly. This type of cycle is called a small cycle.

2 large cycles: when the engine water temperature is higher than 86, the main valve of the thermostat is opened and the bypass valve is closed. The cooling water enters the radiator through the main valve for heat dissipation, and the water temperature decreases rapidly, and then the water pump is sent to the cylinder body water jacket. This type of cycle is called the Great Cycle.

So why do you use thermostats? In fact, the thermostat is a three-way valve, one pipe is connected to the engine water outlet, one pipe is connected to the radiator, and one pipe is connected to the engine water inlet.

To put it simply, the function of the thermostat is to set a working temperature, when the coolant temperature reaches the set temperature, the coolant can be dissipated through the radiator, and when the coolant temperature is lower than the set temperature, the coolant can only circulate in the engine flow channel.

The function of the thermostat is to ensure that the coolant temperature is stable within a range and the engine operating temperature is stable.

Composition of the thermostat.

The thermostat assembly consists of three parts: thermostat (thermostat), shell, and temperature sensor. Simply put, it is a "smart" three-way valve. The thermostat transmits the temperature data to the engine ECU, which has a certain impact on the amount of fuel injected into the engine.

How thermostats work.

When the engine is just started: because the engine temperature is too low at this time, in order to raise the engine temperature to the ideal working temperature as soon as possible, there is no need for coolant to flow through the radiator to cool down, only the coolant needs to circulate in the engine cooling water channel, this cycle is called "small circulation". At this time, the thermostat is turned off.

When the coolant temperature is too high: If the engine temperature is too high, the coolant needs to cool the engine quickly, at this time, all the coolant flows through the radiator to cool down, and the thermostat is fully open. This cycle is known as the "Great Cycle".

When the coolant temperature is low: When the engine temperature is slightly higher than the ideal working temperature after the engine has been working for a period of time, the coolant temperature has risen to the thermostat working temperature, the thermostat is turned on, and the coolant flows through the radiator to cool down. However, because the temperature of the coolant is relatively low at this time, if all the coolant is cooled by the radiator, the coolant temperature will be too low, then the thermostat at this time is only partially opened, and there is still a part of the coolant to achieve "small circulation".

At this time, in fact, it is the "big cycle" and the "small cycle" that work together.

What is the impact of a thermostat failure?

If the thermostat can not be turned off, the coolant has been achieving a "large circulation", which has little impact on the high temperature in summer or hot areas, which is also the reason why some taxis run for a long time, which is easy to cause the high temperature of the coolant to cause the driver to remove the thermostat after the alarm. However, if it is a cold winter, the coolant and engine temperature of the vehicle can reach -30 or even lower after being placed overnight, and if the "big cycle" is achieved after the vehicle is started, it is difficult for the vehicle to reach the optimal working temperature, resulting in increased fuel consumption; On the other hand, the coolant heats up too slowly, and it is difficult to get warm air out of the car.

If the thermostat cannot be turned on, the coolant has been "small circulation" in the engine, and the heat cannot be dissipated, which can easily cause the coolant temperature to be too high and alarm.

The engine is cold, and the car can't run normally.

The continuous high temperature of the engine, the engine life is reduced, and the serious will occur**.

When the thermostat can only be turned on and not closed, the water temperature cannot be raised, especially in winter. The water temperature is low, the water temperature sensed by the water temperature sensor is also low, and the potential provided by the sensor to the computer is also low, and the instructions issued by the computer are actually wrong. The computer widens the pulse of the fuel injector, the amount of fuel injected increases, and the car consumes fuel.

In the car, you can feel the temperature of the upper and lower water pipes by hand, first start the engine, touch the upper and lower water pipes after 3 minutes, if it is a good thermostat, the temperature of the upper and lower water pipes is not the same, generally the upper water pipe is hot and the lower water pipe is cold. When the engine water temperature reaches 90, the upper and lower water pipes are hot, which proves that the thermostat is good. If the temperature of the upper and lower water pipes is the same after starting the engine, the thermostat will be broken.

The dismantled thermostat can be boiled with water, and the thermostat and the thermometer are put into a container together to cook the general thermostat 75 when the middle will be separated, and it will be bad if it is opened too early or too finished.

It will accelerate the wear and tear of the engine, resulting in a decrease in the life of the vehicle.

When the engine temperature is too high when it is turned off and cannot be turned on, it will stall due to the high temperature. And because the thermostat is closed and the water tank system is cut off, the water with too high temperature and too high pressure cannot be pressed into the tank through the opening of the tank cover, so it may cause damage to the water jacket of the small circulation system, such as the pad, the heater tank, and some water pipes. But it will not cause damage to the large tank.

Hello, my car is a 4A91 engine, suddenly found that the meter temperature is as high as 9o degrees, and then gradually change the water tank, water pump, all changed, the thermostat is replaced by four, the air is also discharged is not circulating, the meter temperature to 82 degrees The fan is also working normally, but the sewer pipe and the water tank are cold. Removing the thermostat is also open, and then I also replaced the temperature sensor and thermostat of the same car shape to my business, but it still doesn't work, what is the reason?

The kinetic energy system does not know about the changes in the engine that cannot be effectively perceived.

The engine is low. Accelerated wear and reduced combustion efficiency.

It will accelerate the wear and tear of internal parts and shorten the normal life of the car.

It's very important, and it can't be demolished.

Hello owner, the large cycle is used to cool the engine, so that the engine temperature is controlled in a suitable range. The small cycle is used to warm the car, so that the water temperature reaches the right temperature as soon as possible. I hope mine is helpful to you, if you still have questions, you can continue to ask, I wish you a happy life