US 12,338,778 B2
Method of operating a fuel injection system
Baptiste Perrot, Blois (FR); and David Gacon, Blois (FR)
Assigned to PHINIA DELPHI LUXEMBOURG SARL, Belvaux (LU)
Appl. No. 18/700,881
Filed by PHINIA DELPHI LUXEMBOURG SARL, Belvaux (LU)
PCT Filed Oct. 11, 2022, PCT No. PCT/EP2022/078311
§ 371(c)(1), (2) Date Apr. 12, 2024,
PCT Pub. No. WO2023/062041, PCT Pub. Date Apr. 20, 2023.
Claims priority of application No. 2114591 (GB), filed on Oct. 12, 2021.
Prior Publication US 2024/0410325 A1, Dec. 12, 2024
Int. Cl. F02D 41/24 (2006.01); F02D 41/38 (2006.01)
CPC F02D 41/2467 (2013.01) [F02D 2041/389 (2013.01); F02D 2200/0602 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of controlling fuel injection in an internal combustion engine having at least one cylinder with an associated fuel injector for performing injector events, wherein for each injector event a drive signal is generated to cause an opening of the fuel injector to spray fuel in accordance with a demand fuel quantity;
wherein, in a drive mode, said drive signal has a length PWf determined from a reference length PWref and a correction value PWcorr;
wherein PWref is determined from a reference map MAP-PWref of a relationship between demand fuel quantity and pulse length,
wherein PWcorr is determined based on a map MAP-PWcorr depending on demand fuel quantity,
wherein MAP-PWcorr is learned during engine runtime by comparing learned injector-specific hydraulic open times and reference hydraulic open times.