Pressure balancing device for motor vehicle, has throttle connecting tanks with environment and arranged such that it balances pressure difference in both directions, where throttle has ventilation insert

摘要

The device has a throttle (110) connecting tanks (114, 115) with environment (122) and arranged in such a manner that it balances the pressure difference in both directions (130). The throttle has a ventilation insert, which limits the flow rate and contains porous material, where the porous material is formed from sintered plastic. The throttle has the maximum flow rate, which is smaller than a pre-determined flow rate corresponding to volume change rate of the tank content. A pressure balance line (124) is arranged between the throttle and the environment. An independent claim is also included for a method for adjusting pressure difference between a tank of a motor vehicle exhaust gas removal system and the surrounding.