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Carburation and fuel injection
Published in M.J. Nunney, Light and Heavy Vehicle Technology, 2007
The carburettor float chamber was originally conceived as long ago as 1886 by the German pioneer automobile engineer Karl Benz. The float chamber acts as a constant-level reservoir for the fuel required by the mixing chamber. To regulate the amount of fuel admitted to the float chamber, a float valve mechanism is used. This consists of either a brass, a rubber or a plastics float that actuates a needle valve, the seating for which is contained in the chamber body or its cover. For accurate control of the fuel level, the needle valve has a tapered tip to allow progressive opening and closing of the fuel inlet passage. In some cases a light compression spring is interposed between the needle valve and its end, which contacts the float arm, so as to reduce vibration effects. A rubber-tipped needle valve may sometimes be used instead of the all-metal type, the resilient tip permitting any fine particles to become temporarily embedded. Hence by ensuring that the needle valve does not leak when closed, the carburettor is less likely to suffer from flooding.
Vehicular Engines
Published in G. K. Awari, V. S. Kumbhar, R. B. Tirpude, Automotive Systems, 2021
G. K. Awari, V. S. Kumbhar, R. B. Tirpude
Float chamberThe float chamber maintains the fuel at a constant level which is necessary for normal operation of a carburettor.
Study on performance enhancement and emission reduction of used carburetor motorcycles fueled by flex-fuel gasoline-ethanol blends
Published in Journal of the Chinese Institute of Engineers, 2020
Thanh Dinh, Khanh Nguyen, Tuan Pham, Vinh Nguyen
where ρf is the fuel density; g is the acceleration of gravity; Δh is the distance between fuel level in the float chamber and fuel discharge nozzle of the carburetor; μd and fd are the discharge coefficient and area of the orifice.