FILTERING DEVICE OF VARIABLE INTAKE SYSTEM

摘要

A filtering device of a variable intake system is provided to prevent a check valve from being clogged by foreign substances including chips or burrs, by preventing foreign substances from flowing into a vacuum passage of the check valve. A filtering device of a variable intake system comprises a check valve and a filter unit(320). The check valve is connected to a hose which forms a vacuum passage, and forms or cuts off vacuum in a vacuum tank by vacuum pressure. The filter unit is mounted in the check valve, and prevents foreign substances flowing into the check valve from flowing into the vacuum passage. The check valve includes a cylindrical body(310); an inlet side nipple(312) formed at an inlet of the body; an outlet side nipple(314) formed at an outlet of the body; and a vacuum valve(316) which is mounted in the body, and connects or disconnects the vacuum passage formed by the inlet side nipple and the outlet side nipple by opening or closing the vacuum passage by the vacuum pressure transferred into the body.