INTAKE AIR FILTER FOR AN INTERNAL COMBUSTION ENGINE

• Main Authors: PRELLWITZ, CHRISTIAN, STEHLIG, JUERGEN
• Format: Patent
• Language: English; French; German
• Published: 01.09.2004
• Edition: 7
• Subjects: BLASTING; COMBUSTION ENGINES; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; STEAM ENGINES; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TRANSPORTING; WEAPONS

An intake air filter ( 1 ) is for an internal combustion engine, especially in a motor vehicle. The filter has a filter housing ( 2 ) having a raw air inlet ( 4 ), a pure air outlet ( 5 ), and an annular filter element ( 3 ) which is arranged in the filter housing ( 2 ) and through which air can flow in a radial manner from the outside towards the inside. The filter element has a first end disk ( 10 ) on the axial end thereof, said disk has an opening ( 12 ) by which means the pure air outlet ( 5 ) communicates with the inside ( 8 ) of the annular filter element ( 3 ). The purpose is to reduce the influence of a secondary air induction on the fresh air supply of the internal combustion engine. To this end, the filter housing ( 2 ) has a secondary air outlet ( 6 ), on the pure air side, and the annular filter element ( 3 ) has a second end disk ( 11 ) on an axial end opposing the first end disk ( 10 ). The second end disk has at least one opening ( 17 ) by which the secondary air outlet ( 6 ) communicates with the inside ( 8 ) of the annular filter element ( 3 ).