The functions of the automobile oil cooler are as follows:
1, because the oil has thermal conductivity, and the continuous flow cycle in the engine, the oil cooler plays a cooling role in the engine crankcase, clutch, valve assembly, etc. Even for water-cooled engines, the only part that can be cooled by water is the cylinder head and cylinder wall, and the other parts are still cooled by the oil cooler.
2, the main material of the product includes aluminum, copper, stainless steel, castings and other metal materials, after welding or assembly, the hot side channel and cold side channel are connected into a complete heat exchanger.
Three, At the beginning, the oil temperature of the engine rises faster, and there is a time difference between the oil heat transfer to the engine housing. In this time difference, the oil cooler has a role. At this time, you will feel a very warm feeling when you touch the engine housing with your hand, you will feel a good effect At this time, the temperature of the engine casing has risen to a relatively high degree. If you quickly touch the engine casing, you will find that it is very hot but not that you can't touch it. At the same time, the temperature of the oil cooler is also very high, which indicates that the thermal process has balanced the speed of the motorcycle, and the air cooling and heat conduction process have balanced and will not increase the temperature The temperature at this time is divided into two: 1 the temperature of the oil and 2 the temperature of the engine housing, the former is higher than the latter in the case of no oil cooler and no oil cooling is installed in the case of the same process as above, it will be found that the temperature of the engine rises very quickly at the beginning of the engine housing after a short period of time The temperature of the engine casing you don't dare to touch with your hands even for a short time the usual method we use is to sprinkle water on the engine casing and hear a squeak indicating that the engine casing temperature has exceeded 120 degrees
4, function; Mainly used for vehicle, construction machinery, ships and other engine lubricating oil or fuel cooling. The hot side of the product is lubricating oil or fuel, and the cold side can be cooling water or air. During the running of the vehicle, the lubricating oil in the major lubrication system relies on the power of the oil pump, passes through the hot side channel of the oil cooler, transfers the heat to the cold side of the oil cooler, and the cooling water or cold air takes the heat away through the cold side channel of the oil cooler, realizes the heat exchange between the cold and hot fluids, and ensures that the lubricating oil is at the most suitable working temperature. Including the cooling of engine oil, automatic transmission oil, power steering oil, etc.
The oil cooler absorbs the heat of the lubricating oil and exchanges heat with the ambient air or the radiator coolant. Usually, automatic transmissions require a dedicated oil cooler. Normally, when the vehicle is in motion, the oil is cooled by a separate heat exchanger. Especially in cars with high-efficiency engines or small-size engines, special oil coolers are an important part of the system.
The function of the oil cooler is to cool the lubricating oil and keep the oil temperature within the normal working range. On high-power reinforced engines, oil coolers must be installed because of the large heat load. When the engine is running, the lubrication ability is reduced because the oil viscosity becomes thinner with the increase of temperature. Therefore, some engines are equipped with oil coolers, whose function is to reduce the oil temperature and maintain a certain viscosity of the lubricating oil. The oil cooler is arranged in the circulating oil circuit of the lubrication system, and its working principle is the same as that of the radiator.
Types of oil coolers
1, air-cooled oil cooler Air-cooled oil cooler is like a small radiator, the core of the cooler is composed of many cooling tubes and cooling plates, and the oil is cooled by the head-on wind when the car is driving. This oil cooler has a large heat dissipation capacity and is mostly used in racing cars and supercharged cars with large heat loads. However, the air-cooled oil cooler needs a long heating time after the engine starts to make the oil reach the normal working temperature, so it is rarely used on ordinary cars.
2, water-cooled oil cooler Oil cooler is placed in the cooling water, using the temperature of the cooling water to control the temperature of the lubricating oil. When the temperature of the lubricating oil is high, it is cooled by the cooling water, and when the engine starts, the heat is absorbed from the cooling water to rapidly increase the temperature of the lubricating oil. The oil cooler is made of aluminum alloy shell, front cover, back cover and copper core tube. In order to enhance the cooling, the tube is equipped with heat sink. The cooling water flows outside the pipe, the lubricating oil flows inside the pipe, and the two exchange heat. There are also structures that cause oil to flow outside the tube and water to flow inside.
The working principle of the oil-cooled engine is mainly to use the oil to circulate inside the engine, in addition to lubrication and cleaning, but also to absorb the heat generated by the engine, and gradually release the heat. However, at high speed or a long time of high-speed operation, the heat absorbed by the oil will be very high, if the heat can not be quickly released, the lubrication performance of the oil will decline, resulting in engine parts wear and loss.
To solve this problem, an oil cooling system can be installed to improve the heat resistance of the oil, thereby maintaining the performance and endurance of the engine. However, choosing the right size of the oil cooler is critical because the oil is delivered to the engine through the pump pressure. If the oil cooler is installed, the load of the oil pump will increase with the increase of space, which usually leads to a decrease in the oil pressure value of the engine.
Excessive drop in oil pressure will lead to oil can not be delivered to the parts in time, affecting heat dissipation and lubrication efficiency, and may even lead to hot melt or burn the piston in serious cases. Therefore, when installing the oil cooling system, it is necessary to carefully choose the right size to ensure that the heat dissipation efficiency of the oil is really improved.
First, the role of oil radiator
Automobile oil radiator is also known as oil cooler and oil heat exchanger, as the name suggests, its role is to heat the oil, prevent the oil temperature is too high to cause oil consumption to increase, but also to prevent oil oxidation deterioration and then affect the lubrication effect of the engine. In addition to cooling the oil, the heat exchanger can also heat the oil at low temperatures.
According to the working principle, the oil radiator can be divided into water-cooled and air-cooled two types. The water-cooled oil radiator is mostly installed above the oil filter and is cooled by the coolant flowing through the cooling system. The water-cooled oil radiator does not require a large cooling area and has a small volume. When the oil temperature is low during the start of the warm car, the oil temperature can be rapidly increased by absorbing heat from the cooling water. The air-cooled radiator uses the head-on wind of the car to dissipate the oil. This oil radiator has a large heat dissipation capacity and is mostly used in racing cars and supercharged engine cars with large heat load.
Second, the working principle of the oil radiator
There are two disconnected pipes inside the oil heat exchanger. One is connected to the oil circuit, so that the oil flows through the heat exchanger, and the other is connected to the coolant circulation pipeline, so that the coolant and the oil heat transfer.
Cooling function: If the oil temperature is higher than normal, it will cause the oil to be too thin and the lubrication effect will decrease. Therefore, under the condition of heat engine, the coolant flowing through the oil heat exchanger is responsible for absorbing the oil heat away, keeping the average oil temperature in the lubrication system not higher than the upper limit (generally 90 ° C).
Heating function: When the cold car starts, the oil temperature is low and the fluidity is poor, which will increase the operating resistance of the engine components, so it is necessary to increase the oil temperature as soon as possible. As the engine runs, the temperature rises and the coolant heats up. At this point, the coolant that is hotter than the oil will heat the oil at the oil heat exchanger.