F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
123/115
F02M 31/02 (2006.01)
Patent
CA 1207616
ABSTRACT OF THE DISCLOSURE The fuel system of a diesel powered vehicle is kept free of wax blockages during cold weather by a mixing unit which is submerged in the fuel tank and furnishes to the fuel pump a waxing resistant supply stream comprising a warm fraction derived from the excess fuel by-passed by the engine injectors and a cold fraction derived from the stored fuel in the tank. The unit delivers to the pump a controlled portion of the excess fuel whose size depends upon the rate of flow, so that the supply stream contains substantially all of the excess fuel when the engine is operating at full throttle, but contains only a selected fraction of the excess fuel when the engine is idling. The balance of the excess fuel available at idle is discharged into the tank. The mixer requires no thermostatic element or other moving parts, can be installed without structural modification of the tank, and keeps the system free of wax blockages without overheating the fuel oil. An improved fuel system incorporating the mixer embodies a heat exchanger for the excess fuel returned to the mixer, and a selector valve which is used to terminate the heat exchanging and mixing functions in the warmer seasons of the year. BACKGROUND OF THE INVENTION Diesel power plants for locomotives and trucks include a fuel system which supplies the engine injectors with fuel at
452736
Farr Company
Smart & Biggar
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