Air filter for internal combustion engines

Details Air filter for internal combustion engines Air filter for internal combustion engines

F - Mech Eng,Light,Heat,Weapons

02

M

F02M 35/00 (2006.01) F02M 35/024 (2006.01) F02M 35/08 (2006.01)

Patent

CA 2123295

An air filter is provided herein for an internal combustion engine which has a filter insert arranged in a housing having a clean air outlet and an unfiltered air inlet which is provided with a screen. The housing also includes an auxiliary unfiltered air inlet which is closed by a normally-closed flap. The flap opens only under the influence of a negative pressure which is generated in the filter housing if the screen becomes clogged, e.g., because of snow or ice which is entrained in the air stream, so that unfiltered air can enter the housing through the auxiliary air inlet.

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