What is the effect of low water temperature on the engine?

Whether the water temperature of the car engine is normal or not has a great impact on the engine. The optimal water temperature for the engine to function properly is around 90. Too high or too low can damage the engine.

High water temperatures are the most harmful because the expansion of each component is set to 90. These two parts work together due to friction. Due to thermal expansion and cold contraction, there is a large time gap in the cold car, which expands when the car is hot, but the optimal gap is only 90 hours.

If the water temperature is too high and exceeds 90, the expansion of the part will become greater and the gap between the two parts will become smaller, resulting in greater friction. The most obvious are the pistons and piston rings. After expansion, the wear of the cylinder becomes greater, causing the cylinder to be pulled.

Severe pistons can get stuck in the cylinder and cause complete damage.

Low engine water temperature is less harmful than high water temperature. The first is the mating clearance of the moving parts. When the water temperature is low, the expansion of the part is small, the assembly gap is too large, and the power is reduced.

The oil temperature also decreases and the viscosity increases, which increases engine running resistance and affects power output. Low water temperatures and poor atomization of gasoline can lead to incomplete combustion, reduced power, and increased fuel consumption. Since the engine wants the water temperature to be normal, it will always be in a state of mixture concentration and increased fuel injection, which will also lead to increased fuel consumption and increased carbon deposition.

If the water temperature is abnormal, it should be checked and maintained in time, otherwise the fan will work all the time and the fan will burn out.

Insufficient fuel combustion leads to carbon deposition, which not only increases fuel consumption, but also pollutes the environment; Long-term low-temperature work accelerates the wear and tear of the engine's internal parts. Automobile water tank, also known as radiator, is the main component of automobile cooling system; Its function is heat dissipation. The cooling water absorbs the heat in the water jacket, flows to the radiator and dissipates the heat, and then returns to the water jacket to circulate to achieve temperature regulation.

It is an integral part of a car's engine. When the engine water temperature is high, the water pump repeatedly circulates to reduce the engine temperature (the water tank is composed of hollow copper pipes, and the high-temperature water enters the water tank and circulates to the engine cylinder wall after air cooling) to protect the engine. If the water temperature is too low in winter, the water cycle will be stopped to avoid the engine temperature being too low.

The hazard of too high and too low engine temperature: when the engine is working, the temperature is too low to make the combustible mixture difficult to ignite or slow combustion, resulting in a decrease in engine power, and the oil becomes thicker due to too low temperature, and the viscosity increases, which increases the resistance of the movement of the parts.

This can lead to significant carbon deposits in the engine. Affect the service life of the engine, the engine will be severely worn or frozen, and may also cause the coolant to freeze seriously, damage the water pipes and pipe lines, and affect the overall operation level of the engine.

The low water temperature of the engine will cause some wear and tear of the engine, and will produce a lot of noise, increase friction, increase fuel consumption in terms of fuel consumption, and also cause too much carbon deposition in the engine, block the pipeline, and make the fuel insufficient.

It will cause a decrease in engine power and an increase in fuel consumption, which will cost special fuel, lead to increased engine wear, reduce the life of the engine, and increase the probability of carbon deposits.

Low engine water temperature can affect fuel consumption.

1. The water temperature of the engine is about 90-98 degrees under normal circumstances, and the hail source is too high or too low, which will affect the efficiency of the engine and may lead to scrapping. If the water temperature is too low, it is easy to increase fuel consumption, and insufficient fuel will also lead to excessive exhaust emissions, and will also cause wear and tear of the engine, affecting the life of the engine.

2. The reason why the engine water temperature is too low is generally the damage of the thermostat or the failure of the cooling fan.

1. The thermostat is damaged.

If the thermostat fails, the valve won't close, and the coolant is always circulating, the engine's water temperature may be too low. Thermostats should be checked.

2. The cooling fan rotates frequently.

For electronic fans, circuit failures cause the electronic fans to rotate constantly; In the case of silicone oil fans, damage to the silicone clutch will also cause the fan to rotate constantly. These faulty cracks will produce low water temperature and should be repaired in time.

Extended Information: Automobile Engine Cooling System: The adjustment of the cooling water volume is automatically controlled by the opening and closing of the main valve and bypass valve of the thermostat.

The paraffin in the thermostat induction body is solid below 76 °C, begins to become liquid above 76 °C, and completely becomes liquid when it reaches more than 86C, increases in volume, compresses the rubber tube, and produces thrust on the central push rod, so as to change the opening and closing source state of the main valve and bypass valve of the thermostat, so as to achieve the purpose of controlling the cooling water circulation route.

Small circulation: When the engine water temperature is low, the main valve of the thermostat is closed, the bypass valve is opened, and the cooling water is circulated in the engine for a small time, and the cooling water circulation route: water pump - water jacket - thermostat bypass valve - small circulation water pipe - water pump.

At this time, the cooling water flow route is short and the flow rate is small, which is convenient for the engine to heat up quickly.

The hazards of low water temperature in cars are:

1. It will lead to insufficient fuel combustion and reduce the working efficiency of the engine;

2. Insufficient fuel combustion causes carbon deposition to withstand the width of the stool, which not only increases fuel consumption but also pollutes the environment;

3. The engine works at low temperature for a long time, which will accelerate the wear and failure of the internal parts of the engine. When the water temperature of the engine is too low, it is necessary to go to the 4S shop for inspection and maintenance as soon as possible.

The normal water temperature of the automobile engine has a great impact on the engine, the water temperature of the normal operation of the engine is about 90 degrees, too high or too low will cause harm to the engine, but the harm of low engine water temperature is not as serious as high water temperature.

The main reasons for the low water temperature of the engine:

1. The cooling fan is so bad.

Obstruct. As the name suggests, the cooling fan is designed to allow more air to flow into the radiator, thereby enhancing the heat dissipation capacity of the radiator and speeding up the cooling rate of the coolant. When it's running all the time and is still spinning at top speed, it causes the engine to dissipate too much heat and the water temperature to be low.

2. There is a problem with the thermostat.

It automatically changes the flow rate of the coolant according to the negative load of the engine and the water temperature, so as to ensure that the engine works at normal temperature. If the thermostat fails, stays on or starts too early, the cooling system is kept on a high cycle and the water temperature of the engine becomes very low.

3. The shutter is faulty.

The blinds are designed to regulate the flow of air through the radiator. When it is turned on, all the air can flow into the radiator, so that the heat dissipation intensity will be high; If it's turned off, the heat dissipation intensity will be low. So when it fails, the shutter is always open to the maximum, and the water temperature of the engine cannot rise.

4. The water temperature sensor is faulty.

The water temperature sensor is used to detect the temperature of the engine coolant and convert the temperature signal into an electrical signal that is transmitted to the engine control unit (ECU) as the main correction signal for gasoline injection, ignition timing, idle and exhaust emission control. If it detects a lower temperature than the actual temperature due to some kind of malfunction, the fault of low engine water temperature will also be displayed on the dashboard. But this is a false fault, although the indicated temperature coarse sensitivity is low, in fact the temperature of the engine is not low, and if we measure the coolant temperature directly with a thermometer we will get the correct answer.

But in this case, because it can't provide the correct signal to the engine control unit, the engine still injects fuel according to the low temperature, and the car will have high fuel consumption.

The hazard of low engine temperatures.

When the engine is working, the temperature is too low to make the combustible mixture ignite difficult or slow combustion, resulting in the decline of engine power, the oil becomes thicker due to the low temperature, the viscosity increases, and the resistance of the movement of the parts increases, and the fuel that is not completely vaporized due to the low temperature washes the oil film on the friction surface of the cylinder piston, piston ring, etc., and dilutes the oil to aggravate the wear of the parts or makes the mixed steam incompletely burn and increase the fuel consumption. The optimal operating temperature of the engine is 80 -90, and the temperature of the car using antifreeze can be appropriately high to 85-95.

In the process of engine work, the cooling medium takes away a lot of heat, so mastering the temperature of the cooling water and reducing unnecessary heat loss has a very important impact on the fuel saving of the car. At 40 hours and 80 hours, the former is more than 10% more expensive than the latter.

The working temperature of the engine is too high, and the thermal expansion of the air is too large, which reduces the inflation coefficient of the engine, destroys the air-fuel ratio, makes the mixture too thick, and the fuel combustion is incomplete. The data show that when the water temperature is 100 to climb the slope, it takes 17min to drive, and the fuel consumption; When the water temperature is 80, climb the same section of slope, only drive for 13 minutes, and consume fuel, the former consumes about 60% more fuel than the latter.

The operating temperature of the engine is too high or too low, which not only increases the fuel consumption, but also leads to the increase of engine wear and tear, which affects the service life of the engine. The wear of the engine at 40 is 5 times that at 90, and if the temperature is too high, the mechanical strength of the engine parts will decrease, which will also cause early damage to the engine. Table 1 illustrates the relationship between engine operating temperature (water temperature) and fuel consumption and engine wear.

The water temperature of the engine is about 90-98 degrees under normal circumstances, and it is not too high or too low, which will affect the efficiency of the engine and may lead to scrapping. If the water temperature is too low, it is easy to increase fuel consumption, and insufficient fuel will also lead to excessive exhaust emissions, which will also cause wear and tear of the engine, affecting the life of the engine.

The reason for the low water temperature of the engine is usually the damage of the thermostat or the failure of the cooling fan.

When the engine water temperature is low, it affects:

1. The viscosity of the lubricating oil is large, which will lead to poor local lubrication, aggravate the wear of parts, and also increase the power consumption of the engine.

2. The water vapor in the combustion products will condense the source of the sweet potato into water and combine with the acid gas to form acids, which aggravates the erosive effect on the body and parts;

3. The erosion of the oil film on the friction surface (cylinder wall, piston, piston ring, etc.) and the dilution of the oil on the friction surface (cylinder wall, piston, piston ring, etc.) due to the low temperature of the fuel aggravate the wear of the parts, and the attenuation of the oil performance is also faster.

The water temperature of the engine is too low, indicating that the cooling effect of the engine is insufficient, or the cooling pipeline is blocked, which has a bad impact on the motive of the source of fraud, and may burn out the energy in the engine.

Hello If the water temperature of the car is too low, the atomization of gasoline will become worse, the combustion will be incomplete, the power will decrease, and the fuel consumption will increase. The issuer wants to change the water temperature to a normal state, so it will always be in a state of mixture thickening, and Suizhen has been increasing the amount of fuel injection, which will lead to an increase in fuel consumption and carbon deposits.

The lower the water temperature, the greater the amount of fuel injected. The aim is to increase the concentration of the mixed volt-burning oil and make the ignition smoother during cold starts. or water temperature, the ECU regulates the amount of fuel injected according to the intake volume, the air-fuel ratio can reach a reasonable level at a reasonable water temperature, and can reflect the so-called maximum thermal efficiency of the engine.

Moreover, if the water temperature is too low, the fuel consumption will increase significantly, and the ambient temperature will differ too much from the set value, especially in the environment below zero, which is usually a multiple of the ideal fuel consumption. To put it simply, the average fuel consumption or Zen fuel is 10 100 km, and the cold start is 20 25 liters 100 km, and then decreases as the water temperature rises.

The low water temperature of the engine will cause the warm air not to be hot, it has no effect on the engine itself, you can continue to use it, I hope mine can help you.

Many people have this experience in the annual inspection of the original national two cars: when the engine is cold to test the exhaust gas, it is unqualified, and the engine is qualified to test the exhaust gas after running at high speed for a period of time. In fact, after the engine temperature is normal, the fuel combustion is sufficient, and the exhaust gas reaches the standard.

Temperatures that are too low can increase the level of wear and tear on the engine, increase the chance of carbon deposits and increase your fuel consumption, all of which can lead to deterioration in the performance of the engine's internal components. The most important part of a hot car is to drive slowly, not idling in place. Slow driving means that the engine is moving, and as long as the engine is moving, it is conducive to the increase in temperature.

Once the large circulation mode is turned on, the coolant flows to the tank, which is constantly cooled by air cooling – it is absorbed by heat, and after the low temperature, it flows again to the cylinder head to absorb heat and the cycle repeats. If the thermostat is damaged, there will be a large cycle during the cold start, and as a result, the temperature will rise very slowly. If the fan has been working, it means that there is a problem, at this time, you only need to check and repair it in time, otherwise it will not only cause the water temperature to be low, but also cause the fan to work all the time, and even burn the fan.

When the thermostat valve cannot be closed, the coolant is always circulating, and the engine water temperature drops quickly.

If you feel that the water temperature of your vehicle has changed greatly from when you first bought a new car, my suggestion is that you check it to see if there is a problem with the size cycle of the vehicle, that is, the thermostat and so on. Therefore, the impact of water temperature on the engine is still obvious, and the winter car should try not to heat up the car after normal ignition, and the water temperature will rise relatively slowly at idle speed.

Another problem is that it will increase engine wear, and the engine oil can not play a normal lubricating effect at low temperatures, so that the wear of the engine will be more serious than the normal temperature, which is also an obvious disadvantage. When the engine is at a low temperature for a long time, and the water temperature sensor detects that the engine is in a low temperature state, the ECU of the engine needs to control the injection pulse width and multi-fuel injection compensation, and the result is that the air-fuel ratio is too large, and the carbon deposition will naturally increase.