公开(公告)号：US11644029B2

公开(公告)日：2023-05-09

申请号：US16993751

申请日：2020-08-14

Applicant: DENSO CORPORATION

Inventor： Satoru Takamizawa ,  Tadaaki Makino

IPC: F02M59/02 ,  F02M59/10 ,  F04B15/00 ,  F04B53/18

CPC classification number: F04B53/18 ,  F02M59/102 ,  F02M2200/02

Abstract: A fuel injection pump includes: a tappet configured to reciprocate by rotation of a cam; a cylinder that supports the tappet to reciprocate; and a plunger configured to reciprocate with the tappet. The tappet includes: a tappet body supported by the cylinder to reciprocate; a pin supported on both sides in an axial direction of the pin by the tappet body; a roller rotatably fitted to an outer peripheral side of the pin; a washer disposed between at least one end surface of the roller in the axial direction and an inner peripheral surface of the tappet body. The washer has at least one protrusion to be in contact with a stopper of the tappet body in either of two rotational directions.

公开(公告)号：US10859050B2

公开(公告)日：2020-12-08

申请号：US16782377

申请日：2020-02-05

Applicant: DENSO CORPORATION

Inventor： Satoru Takamizawa

IPC: F02M39/02 ,  F02M37/06 ,  F02M59/10 ,  F02M59/46 ,  F02M41/12 ,  F01L1/14 ,  F02M37/04 ,  F01L1/16

Abstract: A fuel injection pump includes a cam rotating with a camshaft, a tappet reciprocating in response to rotation of the cam, a cylinder, a plunger, and a thrust washer. The thrust washer is located between the cam and a casing housing the camshaft at both ends of the cam in an axial direction of the cam. The tappet includes a tappet body, a roller, a supporting member, and a contact surface formed at an outer peripheral part of the tappet. The thrust washer includes a rotation restricting part that protrudes toward the tappet over a maximum lift position. The rotation restricting part restricts rotation of the tappet relative to a center axis of the tappet body by being contact with the contact surface.