F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
F02M 17/20 (2006.01) F02B 61/04 (2006.01) F02B 75/16 (2006.01) F02M 17/26 (2006.01) F02M 33/00 (2006.01) F02B 1/04 (2006.01) F02B 75/02 (2006.01)
Patent
CA 2153600
A carburettor metering system comprises a fuel evaporator consisting of porous parallel plates with their lower portions immersed in fuel, fuel metering means for supplying fuel to the evaporator, and a laminar flow air restrictor comprising a series of parallel plates separated by spacers and defining narrow gaps between the plates. Such an arrangement enables a substantially constant air/fuel mixture strength to be obtained over a wide range of air flow rates in single cylinder engines. Furthermore the supply of mixture to the engine by way of an exit tube may be controlled by a valve member coupled to the engine governor so that the rate of flow mixture varies in dependence on the load, and additionally so as to change the system between two modes of carburettor operation, namely lean operation, which is provided up to about three quarters load, and rich operation in which additional fuel is supplied to the evaporator.
Marks & Clerk
Pedersen John Rendell Conrad
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