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1. A fuel supply device for a heat engine, which feed device includes two reservoirs, two feed pumps and two feed conduits, a first reservoir containing a first fuel and a second reservoir containing a second fuel, with the first and second reservoirs being in communication with a feed housing of the heat engine by means respectively of first and second feed conduits, with a first feed pump being positioned between the first reservoir and the first feed conduit and a second feed pump being positioned between the second reservoir and the second feed conduit, with the feed device also including a heat exchanger located between the second feed pump and the second feed conduit, so as to heat the second fuel before reaching the second feed conduit, as well as an outlet conduit located between the heat exchanger and the second feed conduit, and a return valve positioned between the outlet conduit and the second feed conduit and connected to a return conduit discharging into the second reservoir, with the return valve being driven as a function of the temperature of the second fuel in order to direct the second fuel to the return conduit when the temperature of the second fuel is lower than or equal to a setpoint temperature Tc, and to the second feed conduit when the temperature of the second fuel is higher than the setpoint temperature Tc, wherein:
the feed device includes an inlet conduit located between the second feed pump and the heat exchanger, as well as a shunt valve located on the inlet conduit and connected to a shunt conduit, with the shunt conduit discharging into the outlet conduit, with the shunt valve being driven as a function of the temperature of the second fuel in order to direct the second fuel coming from the second feed pump to the heat exchanger when the temperature of the second fuel is lower than or equal to the setpoint temperature Tc, and to the shunt conduit when the temperature of the second fuel is higher than the setpoint temperature Tc. |
