Fuel vapor treating apparatus

摘要

A fuel vapor treating apparatus includes a lower valve casing (62) and an upper valve casing (63). A float (64) is provided in the lower valve casing (62) and a valve portion (65) is provided in the float (64) for sealing the flow of fuel. A valve port (66) is provided between the lower valve casing (62) and the upper valve casing (63) and is opened and closed by the valve portion (65). A vent passage portion (67) is provided in the upper valve casing (63). A space portion (68) is provided between the vent passage portion (67) and the valve port (66). A valve portion (65) of the float (64) moves vertically in accordance with a liquid level in a fuel tank and opens and closes the valve port (66), whereby the fuel tank is brought into communication with the vent passage portion (67). A vent port (70) is provided in a partition (69) that separates the space portion (68) from the vent passage portion (67). And, a second float (71) is provided to open and close the vent port (70). The fuel vapor treating apparatus reliably stops fuel leakage from the fuel tank.