| 摘要 |
PURPOSE: A control device of fuel temperature is provided to improve performance of an engine, combustion efficiency and the durability of parts, and to reduce fuel consumption by keeping proper temperature of fuel supplied to the engine. CONSTITUTION: A fuel temperature control device comprises a cold passage(20) and a hot passage(21) branched from a fuel supply pipe(3) and connected to a fuel filter(6); a variable passage valve(30) connecting the fuel supply pipe to the cold passage or the hot passage by switching according to fuel temperature; a heater(50) installed in the middle of the cold passage to increase temperature of fuel; a cooling line(24) zigzagged in the hot passage; a cooling unit(40) installed in the cooling line to cool hot fuel through the cooling line by supplying wind to the cooling line; a three-way valve(25) installed in the inlet of the fuel filter to supply fuel through the cold passage and the hot passage to the fuel filter; a temperature sensor detecting temperature of fuel through the fuel filter; and a controller selectively connecting the fuel supply pipe to the cold passage or the hot passage by switching the variable passage valve according to temperature of fuel, and controlling temperature of fuel by driving the cooling unit or the heater.
|
