| 摘要 |
A fuel system for use with an internal combustion engine includes primary and secondary carburetors and vaporizing apparatus. When starting the engine, liquid fuel is supplied by a fuel pump to the primary carburetor via a first switchable valve means. After the engine has warmed sufficiently, liquid fuel is prevented from reaching the primary carburetor, and instead is supplied to the vaporizing apparatus via second switchable valve means. Vaporized fuel is supplied to the primary carburetor from the vaporizing apparatus via the secondary carburetor.
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