US 12,421,926 B2
Method for producing a combined filtration and calibration assembly
Jean-Etienne Blanc, Blois (FR); and Philippe Legrand, St. Gervais la Foret (FR)
Assigned to PHINIA JERSEY HOLDINGS LLC, Wilmington, DE (US)
Appl. No. 17/629,010
Filed by DELPHI TECHNOLOGIES IP LIMITED, St. Michael (BB)
PCT Filed Jul. 22, 2020, PCT No. PCT/EP2020/070650
§ 371(c)(1), (2) Date Jan. 21, 2022,
PCT Pub. No. WO2021/013879, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 1908332 (FR), filed on Jul. 23, 2019.
Prior Publication US 2022/0268247 A1, Aug. 25, 2022
Int. Cl. B23P 11/00 (2006.01); F02M 61/16 (2006.01); F02M 51/06 (2006.01)
CPC F02M 61/165 (2013.01) [F02M 61/168 (2013.01); F02M 51/0685 (2013.01); F02M 2200/27 (2013.01); F02M 2200/28 (2013.01); F02M 2200/505 (2013.01); F02M 2200/8053 (2013.01)] 1 Claim
OG exemplary drawing
 
1. A method for producing a combined filtration and calibration assembly of a fuel injector arranged in an internal combustion engine, the combined filtration and calibration assembly extending along a longitudinal axis and comprising a single calibration sleeve provided with a longitudinal bore and defining a multitude of filtration holes, the combined filtration and calibration assembly having a calibrated orifice in the bore, said method comprising, in the following order, the steps of:
rolling up a tube made of stainless steel to form said calibration sleeve with said longitudinal bore;
inserting a circular plate into the tube, said calibrated orifice being provided at a center of said circular plate with a calibrated hole opening on both sides of said circular plate;
crimping the circular plate; and then
subsequent to the steps of rolling up the tube, inserting the circular plate into the tube, and crimping the circular plate, performing the step of drilling the filtration holes using a laser.