Self regulated vacuum generator, has venturi cells acted on aspiration chamber, and electronic unit driving valves based on result of comparison between vacuum values reigned in aspiration chamber and set point values

摘要

The generator has venturi cells (C4, C5) acted on an aspiration chamber (32), where inlet of each cell is selectively connected or isolated from a pressurized air source (31) e.g. pressurized air duct, by pilot valves (33, 34). An outlet of the cells is connected to atmosphere through unidirectional valves (36, 37). An electronic unit (35) drives the valves based on a result of comparison between vacuum values reigned in the aspiration chamber and set point values.