Word forms: (regular plural) air cleaners
noun (Automotive engineering: Vehicle components, Engine, transmission, and exhaust) An air cleaner or air filter is any device that stops particles that are present in the air from entering air-breathing machinery. ⇒ Special features include an air cleaner that filters exhaust emissions from other cars. ⇒ The carburetor breathes through an oil bath air cleaner. ⇒ The faster the car goes, the higher the pressure of the air entering the vents which feed the air cleaner and eventually the engine.
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