Fuel supply device for engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorToshiyuki Yamazaki
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Abstract
A fuel supply device for an engine includes a fuel tank positioned such that, at least when the fuel tank is filled with fuel, a first fuel level in the fuel tank is higher than a minimum required second fuel level in a float chamber. A bypass passage that bypasses a fuel pump is provided, and an on-off valve is disposed in the bypass passage. The fuel supply device is capable of improving a starting characteristic of the engine during an off period of the fuel pump without increasing a head difference between the first and second fuel levels.
Claims4
A fuel supply device for an engine, the fuel supply device comprising:
- a carburetor disposed in an intake system of the engine;
- a fuel tank arranged to hold fuel to be supplied to the carburetor, the fuel tank being positioned such that, at least when the fuel tank is filled with fuel, a fuel level in the fuel tank is higher than a minimum required fuel level in a float chamber of the carburetor;
- a fuel pump arranged to supply fuel to the carburetor when the engine is running;
- a bypass passage arranged to bypass the fuel pump and supply fuel directly to the carburetor;
- and
- an on-off valve provided in the bypass passage and arranged to control a flow of fuel through the bypass passage.
Dependencies are inferred from the claim text.