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1. (WO2014200424) FUEL SYSTEM FOR COMBUSTION ENGINE AND A METHOD FOR REDUCING THE RISK OF OPERATIONAL DISTURBANCE CAUSED BY PARAFFINED FUEL IN THE FUEL SYSTEM

Pub. No.:    WO/2014/200424    International Application No.:    PCT/SE2014/050696
Publication Date: Fri Dec 19 00:59:59 CET 2014 International Filing Date: Wed Jun 11 01:59:59 CEST 2014
IPC: F02M 37/22
B01D 29/66
F02D 41/00
Applicants: SCANIA CV AB
Inventors: CEDFORS, Dan
Title: FUEL SYSTEM FOR COMBUSTION ENGINE AND A METHOD FOR REDUCING THE RISK OF OPERATIONAL DISTURBANCE CAUSED BY PARAFFINED FUEL IN THE FUEL SYSTEM
Abstract:
The invention pertains to a fuel system for a combustion engine (2), which fuel system (4) comprises a first fuel tank (20), a second fuel tank (22), a first fuel conduit (36) arranged in connection with the first fuel tank (20) and the second fuel tank (22), a second fuel conduit (40) arranged in connection with the first fuel tank (20) and a main feeding pump (26) arranged to feed fuel from the first fuel tank (20) through the second fuel conduit (40), via a main fuel filter (12), to a high pressure system (19). A first electrical engine (M1) is arranged to operate the main feeding pump (26), wherein the main feeding pump (26) is reversible, so that the flow direction through the main fuel filter (12) and the second fuel conduit (40) may be reversed in order to empty the main fuel filter (12) and the second fuel conduit (40) of fuel, when a risk of fuel paraffination has been identified. The invention also pertains to a method to reduce the risk of operational disturbances caused by paraffinated fuel in a fuel system.