A fuel system for an internal combustion engine, internal combustion engine with such a fuel system, vehicle having such a fuel system and method for reducing the risk of malfunction due to paraffinized fuel in a fuel system

摘要

The invention relates to a fuel system (4) for an internal combustion engine (2) with a first fuel tank (20), a second fuel tank (22), a first fuel line (36) connected to the first fuel tank (20) and the second fuel tank (20). 22), a second fuel line (40) connected to the first fuel tank (20), a main feed pump (26), the fuel from the first fuel tank (20) through the second fuel line (40) a high-pressure system (19) a transfer pump (28) which supplies fuel from the second fuel tank (22) via the first fuel line (36) to the first fuel tank (20) and a pre-filter (30) placed behind the transfer pump (28). A first electric motor (M1) drives the transfer pump (28), which is reversible, so that the flow direction through the pre-filter (30) and the first fuel line (36) can be reversed if a risk of paraffin enrichment of the fuel has been detected. The invention also relates to a method for reducing the risk of malfunction due to paraffinized fuel in a fuel system.