The oil cooler is a device that accelerates the heat dissipation of lubricating oil to keep it at a lower temperature. In high-performance, high-power reinforced engines, oil coolers must be installed due to the large heat load. The oil cooler is arranged in the lubricating oil circuit, and its working principle is the same as that of the radiator.
Types
Air-cooled
The core of the air-cooled oil cooler consists of many cooling pipes and cooling plates. When the car is driving, the hot oil cooler core is cooled by the car's headwind. Air-cooled oil coolers require good ventilation around them. It is difficult to ensure sufficient ventilation space in ordinary cars, so they are rarely used. This type of cooler is mostly used in racing cars because the racing speed is high and the cooling air volume is large.
Water-cooled
The oil cooler is placed in the cooling water circuit, and the temperature of the cooling water is used to control the temperature of the lubricating oil. When the lubricating oil temperature is high, it is cooled by cooling water. When the engine starts, it absorbs heat from the cooling water to quickly increase the temperature of the lubricating oil. The oil cooler consists of a shell, front cover, rear cover and copper core tube cast from aluminum alloy. In order to enhance cooling, a heat sink is installed outside the tube. The cooling water flows outside the tube, and the lubricating oil flows inside the tube, and the two exchange heat. There is also a structure that allows the oil to flow outside the tube and the water to flow inside the tube.
Classification
①Engine oil cooler: cools the engine's lubricating oil to keep the oil at a reasonable temperature (90-120 degrees) and a reasonable viscosity; the installation position is in the cylinder part of the engine, and it is installed together with the shell during installation.
②Transmission oil cooler: cools the transmission's lubricating oil, installed in the lower water chamber of the engine radiator or on the outside of the transmission case, and if it is air-cooled, it is installed on the front side of the radiator.
③Retarder oil cooler: cools the lubricating oil when the retarder is working, and the installation position is outside the transmission
, mostly shell-and-tube or water-oil composite products.
④Exhaust gas recirculation cooler: a device used to cool part of the exhaust gas returned to the engine cylinder, the purpose is to reduce the content of nitrogen oxides in automobile exhaust.
⑤ Heat dissipation cooler module: It is a device that can cool multiple objects or parts of objects such as cooling water, lubricating oil, compressed air, etc. at the same time. The cooling module adopts a highly integrated design concept and has the characteristics of full function, small volume, intelligence and high efficiency.
⑤ Air cooler, also known as intercooler, is a device used to cool the high-temperature and high-pressure air after the engine is supercharged. Through the cooling of the intercooler, the temperature of the supercharged air can be reduced, thereby increasing the density of the air to achieve the purpose of engine power, reducing fuel consumption and emissions.
Core material
The material of the oil cooler core is required to have strong corrosion resistance and heat dissipation. Generally, there are two types, one is copper and the other is stainless steel. Of course, copper is the first choice with strong heat dissipation and corrosion resistance, and stainless steel is second. The heat dissipation of stainless steel is not as good as copper material, but the corrosion resistance is stronger than copper material.