车用空气滤清器１前言空气滤清器随着内燃机的进步而进步，尤其最近１０年的变化特别大。空气滤清器的最基本功能是过滤进气中的尘埃。近年来，随着轿车的高级化，为了提高舒适性，降低车内噪声成为重要课题。并且，为了保护环境，车外噪声法规也在强化。在这样的背景下，... Automotive air cleaner 1 Introduction Air cleaner with the progress of internal combustion engines and progress, especially in the last 10 years, the changes are particularly large. The most basic function of the air filter is to filter the air in the dust. In recent years, with the advancement of sedans, reducing noise in the vehicle has become an important issue for improving comfort. And, in order to protect the environment, noise laws outside the car are also intensified. under such a circumstance,...