US 11,746,722 B2
Method of control of fuel temperature injected in combustion engine
Fernando Lepsch, Campinas (BR); Fernando de Oliveira, Jr., Campinas (BR); and Marcello Francisco Brunocilla, Indaiatuba (BR)
Assigned to Robert Bosch Limitada, Campinas (BR)
Filed by ROBERT BOSCH LIMITADA, Campinas (BR)
Filed on Nov. 21, 2019, as Appl. No. 16/690,677.
Claims priority of application No. 102018077109-4 (BR), filed on Dec. 26, 2018.
Prior Publication US 2020/0208588 A1, Jul. 2, 2020
Int. Cl. F02D 41/30 (2006.01); F02M 53/04 (2006.01)
CPC F02D 41/3005 (2013.01) [F02M 53/04 (2013.01); F02D 2200/0606 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method of control of fuel temperature injected in a combustion engine having a fuel, the combustion engine comprising:
an engine control unit (9) in the combustion engine,
at least one fuel-heating device (3) positioned in contact with the fuel in a fuel rail (1);
at least one fuel-heating control unit (6) connected by means of at least one data connection to the engine control unit (9), the at least one fuel-heating control unit (6) electrically connected to the at least one fuel-heating device (3), where the at least one fuel-heating control unit (6) controls the operation of the at least one fuel-heating device (3);
the method comprising the successive steps of:
measuring the temperature of the fuel (Tc) downstream of the at least one fuel-heating device (3);
reading a target temperature of the fuel (Ta) downstream of the at least one fuel-heating device (3);
comparing the temperature of the fuel (Tc) downstream of the at least one fuel-healing device (3) with the target temperature of the fuel (Ta) downstream of the at least one fuel-heating device (3);
detecting an input from an acceleration pedal;
calculating a power (Paq) necessary to be used in the at least one fuel-heating device (3) so that the temperature of the fuel (Tc) downstream of the at least one fuel-heating device (3) is maintained during an anticipated variation in a flow rate of the fuel injected in the combustion engine, the anticipated variation in the flow rate being determined based on the input from the acceleration pedal and corresponding to a variation in a speed of the combustion engine;
applying the calculated power (Paq) to the at least one fuel-heating device (3), the application of the calculated power (Paq) controlled by the at least one fuel-heating control unit (6);
comparing the temperature of the fuel (Tc) downstream of the at least one fuel-healing device (3) with the target temperature of the fuel (Ta).