Some of the energy generated in a combustion engine is converted into heat. To avoid engine overheating, this heat must be dissipated. This task is performed by the engine’s cooling system. Vehicle manufacturers use specific coolants or mixtures of water and antifreeze (ethylene glycol) as the heat-transfer medium. This coolant absorbs the heat and transports it via the cooling circuit to the radiator, which releases the heat. To prevent overheating, the coolant level should be checked regularly. In today’s modern vehicles, the cooling system is designed to be virtually maintenance-free. In passenger cars, about five to ten liters of coolant flow from the cylinder block/cylinder head to the radiator.
Coolant filters – applications
Wherever large engines are installed, the coolant and its condition are even more important. These systems include an integrated a coolant filter and typically contain up to ten times the aforementioned volume of coolant, and sometimes even more.
Engines of this size are used, for example, in the construction and agricultural machinery industry, the commercial vehicle sector, shipping, combined heat and power plants as well as engine test beds.
Purpose of coolant filters
In addition to the important task of removing heat from the engine in both the cold depths of winter and the sweltering heat of summer, the filter must ensure that the fine channels in the engine block and cooling system remain free of debris.
Durable and robust coolant filters are installed to ensure this. The moment the cooling circuit is started up, they begin permanently filtering impurities and suspended particles out of the coolant.
Structure of coolant filters
In terms of its design, construction and technology, a coolant filter is very similar to the traditional spin-on oil filters used for engine oil filtration. The spin-on design enables rapid installation during vehicle production, retrofitting and, of course, servicing. Should the need for retrofitting arise, corresponding filter heads for attachment of the spin-on filter are also available. In technical circles, these variants are also known as in-line filters.
Highly durable, dirt-absorbing, water and temperature-resistant filter media are used, depending on the coolant. To prevent corrosion, coolant filters with integrated inhibitors can optionally be installed. The inhibitor reduces or slows down oxidative reactions in the system.
Through regular maintenance of all filter components in and around the engine, you can prevent system failures and create the optimum conditions for a long engine life.
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