Fuel economy device for IC engine - has passage from carburettor to intake pipe, with feedback of air-fuel mixture from intake pipe to passage

摘要

The device has a passage through which an air-fuel mixture passes from the carburettor to the intake pipe, and a chamber whose mouth faces the air-fuel stream. A duct connects the chamber to the air-fuel stream at the outlet of the passage. The passage has a cylindrical section connected to a divergent frusto-conical section.