公开(公告)号：US20220364535A1

公开(公告)日：2022-11-17

申请号：US17321826

申请日：2021-05-17

Applicant: DELPHI TECHNOLOGIES IP LIMITED

Inventor： Brandon KASWER ,  Joseph G. SPAKOWSKI

IPC: F02M59/46 ,  F02M59/02 ,  F02M59/36

Abstract: A fuel pump includes a pump housing with a pumping chamber an inlet valve bore. An inlet valve selectively provides and prevents fluid communication between an inlet of the fuel pump and the pumping chamber. The inlet valve includes an inner housing received within the inlet valve bore such that an outer periphery of the inner housing is sealed to an inner periphery of the inlet valve bore. An outer housing circumferentially surrounds the inner housing. An annular chamber is defined radially between the inner housing and the outer housing and axially between the outer housing and the pump housing. A sealing ring is located within the annular chamber such that the sealing ring is compressed axially against the pump housing and the outer housing.

公开(公告)号：US20220003233A1

公开(公告)日：2022-01-06

申请号：US17477737

申请日：2021-09-17

Applicant: DELPHI TECHNOLOGIES IP LIMITED

Inventor： Joseph G. SPAKOWSKI ,  Brandon KASWER

IPC: F04B53/14 ,  F04B53/16 ,  F04B19/22 ,  F02M59/44 ,  F04B1/053 ,  F04B53/02 ,  F04B1/0408 ,  F04B7/00 ,  F04B1/0448

Abstract: A fuel pump includes a plunger which reciprocates within a bore of a housing. The plunger extends from a first end proximal to a pumping chamber to a second end distal from the pumping chamber and includes a sealing ring groove between the first end and the second end. The sealing ring groove extends from an upper shoulder proximal to the first end to a lower shoulder distal from the first end and are separated by a first distance. A sealing ring is located within the sealing ring groove and engages the bore in an interference fit. A diametric clearance greater than 12 microns and less than 30 microns is provided between the plunger and the bore such that the diametric clearance extends between the sealing ring groove and the first end for a second distance which is at least four times the first distance.

公开(公告)号：US20220082071A1

公开(公告)日：2022-03-17

申请号：US17405166

申请日：2021-08-18

Applicant: DELPHI TECHNOLOGIES IP LIMITED

Inventor： Timothy D. SPEGAR ,  Joseph G. SPAKOWSKI

IPC: F02M59/20 ,  F02M55/02 ,  F02M37/00

Abstract: A fuel system includes a low-pressure fuel delivery unit and a high-pressure fuel delivery unit which has a low-pressure region and a high-pressure region such that the low-pressure region supplies fuel to the high-pressure region which supplies the fuel to a plurality of high-pressure fuel injectors. A low-pressure fuel rail supplies fuel to low-pressure fuel injectors. A low-pressure fuel injector line is connected at a first end directly to the high-pressure fuel delivery unit and receives fuel from the low-pressure region and is connected at a second end directly to the low-pressure fuel rail, thereby providing fluid communication from the low-pressure region to the low-pressure fuel rail. A device is located between the low-pressure region and the low-pressure fuel rail and reduces fuel pressure pulsations.