Oil cooler is a device that accelerates the heat dissipation of lubricating oil to keep it at a lower temperature. On high-performance, high-power enhanced engines, oil coolers must be installed because of the large heat load. The oil cooler is arranged in the lubricating oil road, and its working principle is the same as that of the radiator.
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.
1, air-cooled oil cooler
The core of the air-cooled oil cooler is composed of a number of cooling tubes and cooling plates. When the car is driving, the hot oil cooler core is cooled by the front wind of the car. Air-cooled oil coolers require good ventilation around, and it is difficult to ensure sufficient ventilation space on ordinary cars, which is generally rarely used. This kind of cooler is mostly used in racing cars, because the racing speed is high and the cooling air volume is large
2, water-cooled oil cooler
The oil cooler is placed in the cooling waterway and uses 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 pipe and water to flow inside.
① Engine oil cooler: cool the engine oil, keep the oil temperature reasonable (90-120 degrees), reasonable viscosity; The installation position is in the cylinder block of the engine, and the installation is integrated with the housing.
② Transmission oil cooler: the lubricating oil that cools the transmission is installed in the water chamber of the engine radiator or the outer side of the transmission shell, if it is air-cooled, it is installed on the front side of the radiator.
③ Retarder oil cooler: cooling retarder working lubricating oil, installed outside the gearbox On the other side, most of them are tube and shell or water-oil composite products.
Exhaust gas recirculation cooler: It is used to cool part of the exhaust gas returned to the engine cylinder and the device, in order to reduce the nitrogen oxide content of the automobile exhaust.
④ Cooling cooler module: It is a device that can cool cooling water, lubricating oil, compressed air and other objects or some objects at the same time. The cooling module adopts a highly integrated design idea, and has the characteristics of intelligent and high efficiency.
The air cooler, also known as the middle cooler, is a device used to cool the high temperature and high pressure air after the engine is pressurized. Through the cooling of the intercooler, the temperature of the charged air can be reduced, thereby increasing the density of the air to achieve the purpose of engine power, reduce fuel consumption and emissions.
1,The functions of the automobile oil cooler are as follows:
Because the oil has thermal conductivity and constantly flows 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.
3, at the beginning of the engine oil temperature rise is relatively fast, the oil heat transfer to the engine housing there is a time difference in this time difference the oil cooler has a role at this time you touch the engine housing will feel very warm feeling you feel good effect until the engine running for a long time after the speed also up the oil cooler to the best working state 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, the role; 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.
First, the advantages of oil-cooled motors
In the technological development process of electric drive assembly of new energy vehicles, smaller and lighter weight drive motors have always been the goal of engineers, and compared with water-cooled motors, oil-cooled motors have the following advantages:
High cooling efficiency, maximize the potential performance of the motor, can improve the power density and torque density of the motor. Good insulation performance, can be in contact with the winding and magnetic materials, direct cooling heat source, eliminate hot spots, direct and simple cooling, and no magnetic conductivity, no conduction, does not affect the electromagnetic field characteristics of the motor. Compared with water, oil has a high boiling point, low freezing point, high temperature is not easy to boil, low temperature is not easy to condense, the application range is wider, and it is not easy to phase change. For oil-injection cooled motors, the housing does not need to design waterways, nor does it need fans and air ducts, which can reduce the volume.
The oil, shuttling through the interior of the engine, lubricates the engine and also plays a cooling role. At the same time, the oil also has the limitation of working temperature, and the excessive temperature may lead to the weakening of the lubrication effect of the oil. The emergence of the oil cooling system is officially to solve this problem. Oil cooling system is a device that accelerates the heat dissipation of lubricating oil to keep it at a lower temperature. According to the different cooling medium, the oil cooling system can be divided into two types: air-cooled and water-cooled. Air cooling uses the air flow generated when the vehicle is running to cool the oil. Water-cooled type is usually installed in the water chamber of the car water tank or c cooling water system, through the heat exchange between the cooling water, the high-temperature oil cooling system has been extremely rare air-cooled oil cooler core composed of many cooling tubes and cooling plates, when the car is driving, the use of car head-on wind cooling hot oil cooler core. Air-cooled oil coolers require good ventilation around, which is difficult to ensure sufficient ventilation space on ordinary cars, and generally rarely used. However, modified cars or racing cars are used more because of the working intensity of the engine.
