Control of fuel vapor discharge of fuel tank system for small-sized engine

摘要

Reconstruction and rework are not needed when producing the fuel tank, it is the fuel vapor discharge system of the fuel tank for the small-sized engine. By the installation of the end of the new filler tube, before the fuel tank fills up, rising the fuel rapidly inside the tube, you send the signal of stop of refueling in the user, when the filler cap is removed, you make the fuel vapor dome maintain inside the fuel tank. Installing the fuel vapor vent valve on another access opening circles, it can soak the valve for turning over of float operation type in this. When reaching to specified positive pressure inside the fuel tank, it opens the vent valve, in addition installs the counterflow vacuum pressure relief valve inside the vent valve. The exit of the vent valve is installed in either of the air intakes of the storage canister or the engine.