US 12,392,278 B2
Method of operating a water injection system
Gavin Dober, Luxembourg (LU)
Assigned to PHINIA DELPHI LUXEMBOURG SARL, Belvaux (LU)
Appl. No. 18/720,292
Filed by PHINIA DELPHI LUXEMBOURG SARL, Belvaux (LU)
PCT Filed Dec. 6, 2022, PCT No. PCT/EP2022/084669
§ 371(c)(1), (2) Date Jun. 14, 2024,
PCT Pub. No. WO2023/110552, PCT Pub. Date Jun. 22, 2023.
Claims priority of application No. 2118229 (GB), filed on Dec. 16, 2021.
Prior Publication US 2025/0059907 A1, Feb. 20, 2025
Int. Cl. F02B 47/02 (2006.01)
CPC F02B 47/02 (2013.01) 13 Claims
OG exemplary drawing
 
1. A method of operating a water injection system of an internal combustion engine, the system comprising an injector for injecting water at least indirectly into the combustion engine and a pump for pumping water from a tank through a feed line to the injector, the method comprising the steps of:
determining if there is a current demand for water injection;
if there is no current demand, checking at least one predefined standby condition to determine if, starting from a current pump performance, it is possible to meet a potential future demand for water injection; and
increasing the pump performance if at least one of the at least one standby condition is fulfilled,
wherein at least one of the at least one standby condition depends on a comparison of at least two time intervals, and wherein one said standby condition depends on a comparison of a first-injection time interval (tfi), which is one of said time intervals and corresponds to a remaining time until a first water injection is potentially needed, and a minimum-pressure time interval (tmp), which is one of said time intervals and corresponds to a remaining time until a minimum pressure needed for injection can be achieved.