Device for preventing evaporation of fuel and exhalation of gas

Abstract

Abstract PURPOSE:To reduce burden on an adsorbent for evaporated vapor which has been held in an adsorbent vessel in such a way that while the engine is in halt, and in case where temperature is low, the vapor space of the evaporated fuel is connected to an air intake system in the downstream from a throttle valve. CONSTITUTION:While the engine is in operation, or in case where cooling water temperature stands at higher than the determined value, a solenoid 32 of a solenoid change-over valve 24 is energized, and a port 27 is connected to a port 29. Then, the vapor evaporated from the fuel in a fuel tank 26 is introduced through the ports 27, 29 into a charcoal canister 1, and adsorbed by activated charcoal 2. While the engine is in halt, and in case where cooling water temperature stands at lower than the determined value, the solenoid 32 of the solenoid change-over valve 24 is deenergized, and the port 27 is connected to a port 31. In consequence, the vapor evaporated from the fuel in the fuel tank 26 is introduced in a surge tank 14, and stagnated therein.

Inventors

• 👤 Kazuo Tomita
• 👤 富田　和男
• 👤 Toshiyuki Murai
• 👤 俊之 村井

Bibliographic Details