AIR INLET SYSTEM FOR INTERNAL COMBUSTION ENGINE Russian patent published in 2014 - IPC F02M35/24 F02M33/02 

FIELD: engines and pumps.

SUBSTANCE: invention can be used in internal combustion engines. Air inlet system (100) for an internal combustion engine includes air filter (1) that comprises a filter element, internal chamber (3) and suction opening (6) for connection of internal chamber (3) to suction channel (7) of the internal combustion engine. Combustion air flows through the filter element to internal chamber (3) and from internal chamber (3) through suction opening (6) to suction channel (7). The engine is provided with an air supply pass that attaches internal chamber (3) to a transfer channel of the engine for supply of additional air to the transfer channel. In addition, air inlet system (100) includes flow resistance device (2). Internal chamber (3), suction opening (6) and suction channel (7) form a combustion air flow path. Flow resistance device (2) represents plastic or rubber foam located on the way of the combustion air flow. At least 30% and preferably at least 40% of combustion air flows through flow resistance device (2) so that flow resistance device (2) absorbs fuel and/or lubricant, which flow backwards from the internal combustion engine through the combustion air path in the direction of at least one filter element. Due to this, penetration of fuel and lubricant onto the filter element is prevented.

EFFECT: preventing penetration of fuel and lubricant onto a filter element.

22 cl, 3 dwg