Ejector and under pressure in front of the direction of action for the brake booster, the use of the ejector

摘要

An ejector (10) contains a nozzle (15) which, with a fluid inlet (11), a diffuser (17), which is provided with a fluid outlet (12), and a decompression chamber (16) which, between the nozzle and the diffuser is arranged. The ejector (10) is of such a nature that it is in the decompression chamber by means of a fluid ejected from the nozzle generates a vacuum. A target at pressure p in the decompression chamber is supplied to a range of 40 kpa & p ≦ 50 kpa adjusted. A ratio sd / sd between a cross section sd of an inlet of the diffusor and a cross section sd an outlet of the nozzle is determined in such a way that the relationship 1,20 ≦ sd / sd ≦ 4,08 - 0,047 p is sufficient.