公开(公告)号：US10288023B2

公开(公告)日：2019-05-14

申请号：US15539215

申请日：2015-11-25

Applicant: Robert Bosch GmbH

Inventor： Benedetto Loiacono ,  Domenico Macchia ,  Luisa Moscarella ,  Michele Antonio Iannuzzi

IPC: F02M59/10 ,  F04B1/04 ,  F02M59/46 ,  F02M59/06 ,  F04B53/12 ,  F04B53/16

Abstract: A pump unit for feeding fuel, preferably diesel fuel, to an internal combustion engine; the pump unit (1) comprising: a head (4) inside which a cylinder (12) extending along an axis (A1) is formed; a pumping piston (5) extending along the axis (A1) and slidingly coupled with the cylinder (12); a through-hole (13) which extends from the cylinder (12) towards the outside of the pump unit (1); an intake chamber (8) communicating with the cylinder (12) via the hole (13); an intake valve (7) which controls the flow of fuel from the intake chamber (8) to the hole (13); a cap (23; 123; 223) which is connected to the head (4), is arranged on the opposite side to the pumping piston (5) and can be selectively fixed along an outer surface (25) of the head (4) so as to close the intake chamber (8) on one side.

公开(公告)号：US20170356411A1

公开(公告)日：2017-12-14

申请号：US15539215

申请日：2015-11-25

Applicant: Robert Bosch GmbH

Inventor： Benedetto Loiacono ,  Domenico Macchia ,  Luisa Moscarella ,  Michele Antonio Iannuzzi

IPC: F02M59/10 ,  F04B1/04 ,  F02M59/46 ,  F02M59/06 ,  F04B53/12 ,  F04B53/16

CPC classification number: F02M59/102 ,  F02M59/06 ,  F02M59/464 ,  F04B1/0421 ,  F04B1/0452 ,  F04B1/0456 ,  F04B53/12 ,  F04B53/16

Abstract: A pump unit for feeding fuel, preferably diesel fuel, to an internal combustion engine; the pump unit (1) comprising: a head (4) inside which a cylinder (12) extending along an axis (A1) is formed; a pumping piston (5) extending along the axis (A1) and slidingly coupled with the cylinder (12); a through-hole (13) which extends from the cylinder (12) towards the outside of the pump unit (1); an intake chamber (8) communicating with the cylinder (12) via the hole (13); an intake valve (7) which controls the flow of fuel from the intake chamber (8) to the hole (13); a cap (23; 123; 223) which is connected to the head (4), is arranged on the opposite side to the pumping piston (5) and can be selectively fixed along an outer surface (25) of the head (4) so as to close the intake chamber (8) on one side.