US 12,372,079 B2 · Fuel pump

Abstract

A valve includes a valve body having a valve plunger barrel formed therein and configured to be mounted to a pump head of a fuel pump, a valve plunger arranged to perform reciprocal motion with respect to the valve plunger barrel, a drive assembly configured to cause the valve plunger to perform reciprocal motion, and a spacer configured to couple to the valve plunger to perform reciprocal motion together with the valve plunger and configured to interface with the pump head. The spacer has a spacer body with first and second opposing spacer surfaces and with a central aperture extending from the first to the second spacer surface and configured to receive the valve plunger therethrough. At least one of the first and second spacer surfaces includes one or more grooves recessed into the spacer body to reduce or inhibit cavitation of the interface of the spacer and pump head.

Claims20

Dependent claims

A valve for a fuel pump, comprising:

a valve body that has a valve plunger barrel formed therein and that is configured to form part of a pump head of the fuel pump;
a valve plunger arranged to perform reciprocal motion within the valve plunger barrel;
and
a spacer configured to couple to the valve plunger so as to perform reciprocal motion together with the valve plunger and configured to interface with the pump head, wherein the spacer has a spacer body with a first spacer surface, a second spacer surface that is opposite the first spacer surface, and a central aperture that extends from the first spacer surface to the second spacer surface and that is configured to receive the valve plunger therethrough, and wherein at least one of the first spacer surface and the second spacer surface includes at least one groove that is recessed into the spacer body so as to reduce or inhibit cavitation of the spacer where the pump head interfaces with the spacer, and wherein a fluid flow passage is formed between the valve plunger barrel and the valve plunger and is in fluid communication with the at least one groove.

1 more element

A valve plunger assembly comprising:

a valve plunger configured to perform, via a drive assembly, reciprocal motion within a valve body, wherein the valve plunger is coupled to a portion of the drive assembly, and wherein the valve body is configured with a valve plunger barrel to form part of a pump head of a fuel pump;
and
a spacer coupled to the valve plunger so as to perform reciprocal motion together with the valve plunger and configured to interface with the pump head, wherein the spacer has a spacer body with a first spacer surface, a second spacer surface that is opposite the first spacer surface, and a central aperture that extends from the first spacer surface to the second spacer surface and that is configured to receive the valve plunger therethrough, and wherein at least one of the first spacer surface and the second spacer surface includes at least one groove that is recessed into the spacer body so as to reduce or inhibit cavitation of the spacer where the pump head interfaces with the spacer, and wherein a fluid flow passage is formed between the valve plunger barrel and the valve plunger and is in fluid communication with the at least one groove.

Dependencies are inferred from the claim text.

Fuel pump

Life of this patent

Fuel pump

Life of this patent

Abstract

Claims20