US 11,852,095 B2
Method for dividing a fuel injection
Philippe Serrecchia, Toulouse (FR)
Assigned to Vitesco Technologies GmbH, Regensburg (DE)
Appl. No. 17/787,723
Filed by Vitesco Technologies GmbH, Regensburg (DE)
PCT Filed Feb. 2, 2021, PCT No. PCT/EP2021/052403
§ 371(c)(1), (2) Date Jun. 21, 2022,
PCT Pub. No. WO2021/156237, PCT Pub. Date Aug. 12, 2021.
Claims priority of application No. 2001118 (FR), filed on Feb. 5, 2020.
Prior Publication US 2023/0024694 A1, Jan. 26, 2023
Int. Cl. F02D 41/40 (2006.01)
CPC F02D 41/402 (2013.01) [F02D 2200/0614 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method, for a direct injection engine, of dividing a fuel injection corresponding to an engine cycle into minimum sub-injections, comprising:
determining a desired maximum number of sub-injections by (i) dividing a mass of fuel to be injected during the engine cycle by a minimum mass per injection for a fuel injector of the direct injection engine and (ii) rounding down to a nearest integer,
selecting between the lower of said desired maximum number of sub-injections and a predetermined authorized maximum number of sub-injections as a selected maximum number of sub-injections,
verifying that an injection duration, for the selected maximum number of sub-injections, is less than a duration of a possible injection window; and
decrementing the selected maximum number when the injection duration is more than the duration of the possible injection.