US 12,264,643 B2
Fuel supply system and method for controlling a fuel pump of a fuel supply system for an internal combustion engine
Maung Maung Aye, Schwaig-Oberding (DE); Yoshihito Yasukawa, Hitachinaka (JP); and Masayuki Saruwatari, Hitachinaka (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Appl. No. 18/710,327
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Nov. 17, 2022, PCT No. PCT/JP2022/042665
§ 371(c)(1), (2) Date May 15, 2024,
PCT Pub. No. WO2023/090386, PCT Pub. Date May 25, 2023.
Claims priority of application No. 10 2021 213 120.4 (DE), filed on Nov. 22, 2021.
Prior Publication US 2025/0012245 A1, Jan. 9, 2025
Int. Cl. F02M 37/00 (2006.01); F02M 37/08 (2006.01)
CPC F02M 37/08 (2013.01) [F02M 2037/085 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for controlling a fuel pump of a fuel supply system for an internal combustion engine comprising the steps of
measuring a pressure of a fuel in the fuel supply system by a first measuring means;
measuring a temperature of the fuel by a second measuring means;
measuring a physical parameter of the fuel by a third measuring means;
determining, by a control unit,
a fuel type based on the measured physical parameter of the fuel, a vapor pressure of the fuel based on the determined fuel type and the measured temperature, and
a pressure amplitude of the measured pressure;
calculating, by the control unit,
a first target pressure value as a sum of the determined vapor pressure, the determined pressure amplitude and a predetermined pressure margin, and
a pressure difference between the first target pressure value and a predetermined second target pressure value; and
if the calculated pressure difference is larger than zero, adjusting, by the control unit, a control value for controlling an operating point of the fuel pump based on the calculated pressure difference.