US 12,281,630 B2
Liquid fluid injection pumps
Xavier Lale, Vendôme (FR)
Assigned to PHINIA DELPHI LUXEMBOURG SARL, Belvaux (LU)
Appl. No. 18/688,454
Filed by DELPHI TECHNOLOGIES IP LIMITED, St. Michael (BB)
PCT Filed Aug. 29, 2022, PCT No. PCT/EP2022/073896
§ 371(c)(1), (2) Date Mar. 1, 2024,
PCT Pub. No. WO2023/031087, PCT Pub. Date Mar. 9, 2023.
Claims priority of application No. 2112493 (GB), filed on Sep. 2, 2021.
Prior Publication US 2024/0344494 A1, Oct. 17, 2024
Int. Cl. F02M 59/46 (2006.01); F02M 59/36 (2006.01)
CPC F02M 59/466 (2013.01) [F02M 59/368 (2013.01); F02M 2200/27 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An injection pump having a pump body provided with an inlet conduit supplying an inlet chamber, a compression chamber downstream from the inlet chamber under which a piston reciprocates to distribute liquid fluid from the compression chamber to an outlet pipe in communication with a common rail circuitry, said injection pump having a valve provided with a resilient cup, located between the inlet chamber and the compression chamber and actuated by an electromagnetic actuator through a pushing rod wherein operation of the valve by the electromagnetic actuator allows the piston to suck liquid fluid from the inlet chamber into the compression chamber and feed the common rail circuitry or to push back liquid fluid in said inlet chamber and said inlet conduit, characterized in that the pump comprises a fixed filter provided around the pushing rod and located between the valve and the electromagnetic actuator in the inlet chamber, said filter being configured to prevent particles travelling in the inlet chamber to reach the electromagnetic actuator,
wherein the filter comprises a mesh disk, or mesh disk elements, located between a rim and a tubular sheath in which the pushing rod is received, said tubular sheath having a proximal end receiving said mesh disk or mesh disk elements and having a distal end away from said mesh disk or mesh disk elements.