Common rail accumulator clamp

Patent metadata

Field	Value
Publication number	US-10378499-B2
Application number	US-201615374092-A
Country	US
Kind code	B2
Filing date	Dec 9, 2016
Priority date	Dec 9, 2016
Publication date	Aug 13, 2019
Grant date	Aug 13, 2019

Abstract

An accumulator clamp for an accumulator assembly in an engine assembly is disclosed. The accumulator assembly further includes an accumulator body and a fuel line adapter connected thereto, and the accumulator assembly is mountable into a cylinder head accumulator bore of a cylinder head. The accumulator clamp includes a clamp body having a clamp accumulator bore receiving an end of the accumulator body, and a bolt bore on either side of the clamp accumulator bore for receiving threaded portions of accumulator mounting bolts that secure the accumulator assembly to the cylinder head. The bolt bores include bolt slots through the walls of the accumulator body so that the threaded portions of the accumulator mounting bolts are insertable into and removable from the bolt bores through the bolt slots to allow installation and removal of the accumulator assembly without disassembling components of the engine assembly around the cylinder head.

First claim

What is claimed is:

1. An accumulator clamp for an accumulator assembly in an engine assembly of a machine, where the accumulator assembly further includes an accumulator body and a fuel line adapter connected thereto, and the accumulator assembly is mountable to a cylinder head of the engine assembly with an injector end of the accumulator body disposed within a cylinder head accumulator bore of the cylinder head, the accumulator clamp comprising:
a clamp body having a clamp body front surface, a clamp body rear surface, a clamp body bottom surface, a clamp body top surface, a clamp body first side surface and a clamp body second side surface;
a clamp accumulator bore surface defining a clamp accumulator bore extending through the clamp body from a clamp accumulator bore bottom opening in the clamp body bottom surface to a clamp accumulator bore top opening in the clamp body top surface, wherein the clamp accumulator bore is shaped to receive a fuel line adapter connection end of the accumulator body inserted through the clamp accumulator bore bottom opening and through the clamp accumulator bore;
a first bolt bore surface defining a first bolt bore extending through the clamp body proximate the clamp body first side surface from a first bolt bore bottom opening in the clamp body bottom surface to a first bolt bore top opening in the clamp body top surface, wherein the first bolt bore is shaped to receive a first threaded portion of a first accumulator mounting bolt extending from the cylinder head adjacent the cylinder head accumulator bore, wherein a first bolt bore inner diameter of the first bolt bore is greater than a first thread portion outer diameter of the first threaded portion of the first accumulator mounting bolt, wherein the first bolt bore surface further defines a first bolt slot through the clamp body from the first bolt bore surface to the clamp body front surface, with the first bolt slot extending upwardly from the clamp body bottom surface and terminating before the first bolt slot extends through the clamp body top surface and with the first bolt slot having a first bolt slot width that is greater than the first thread portion outer diameter of the first threaded portion so that the first threaded portion of the first accumulator mounting bolt is insertable into and removable from the first bolt bore through the first bolt slot; and
a second bolt bore surface defining a second bolt bore extending through the clamp body proximate the clamp body second side surface from a second bolt bore bottom opening in the clamp body bottom surface to a second bolt bore top opening in the clamp body top surface, wherein the second bolt bore is shaped to receive a second threaded portion of a second accumulator mounting bolt extending from the cylinder head adjacent the cylinder head accumulator bore and diametrically opposite from the first accumulator mounting bolt relative the cylinder head accumulator bore, wherein a second bolt bore inner diameter of the second bolt bore is greater than a second thread portion outer diameter of the second threaded portion of the second accumulator mounting bolt, wherein the second bolt bore surface further defines a second bolt slot through the clamp body from the second bolt bore surface to the clamp body front surface, with the second bolt slot extending upwardly from the clamp body bottom surface and terminating before the second bolt slot extends through the clamp body top surface and with the second bolt slot having a second bolt slot width that is greater than the second thread portion outer diameter of the second threaded portion so that the second threaded portion of the second accumulator mounting bolt is insertable into and removable from the second bolt bore through the second bolt slot.

2. The accumulator clamp of claim 1 , wherein the first bolt bore bottom opening and the second bolt bore bottom opening are closer to the clamp body top surface than the clamp accumulator bore bottom opening.

3. The accumulator clamp of claim 1 , comprising:
a first boss extending upwardly from the clamp body top surface at the first bolt bore, wherein the first bolt bore surface extends through the first boss and terminates at a first boss top surface; and
a second boss extending upwardly from the clamp body top surface at the second bolt bore, wherein the second bolt bore surface extends through the second boss and terminates at a second boss top surface.

4. The accumulator clamp of claim 3 , wherein the first boss top surface is countersunk to form a first conical surface to receive and engage a first convex surface of a first spacer ring, and the second boss top surface is countersunk to form a second conical surface to receive and engage a second convex surface of a second spacer ring.

5. The accumulator clamp of claim 3 , wherein the first boss tapers from a first boss maximum outer diameter proximate the clamp body top surface to a first boss minimum outer diameter proximate the first boss top surface, and the second boss tapers from a second boss maximum outer diameter proximate the clamp body top surface to a second boss minimum outer diameter proximate the first boss top surface.

6. The accumulator clamp of claim 1 , wherein the first bolt bore inner diameter proximate the first bolt slot is greater than the first bolt slot width, and the second bolt bore inner diameter proximate the second bolt slot is greater than the second bolt slot width.

7. The accumulator clamp of claim 1 , wherein the first bolt bore inner diameter tapers from a first bolt bore maximum inner diameter proximate the first bolt slot to a first bolt bore minimum inner diameter proximate the first bolt bore top opening, and wherein second bolt bore inner diameter tapers from a second bolt bore maximum inner diameter proximate the second bolt slot to a second bolt bore minimum inner diameter proximate the second bolt bore top opening.

8. An accumulator clamp for an accumulator assembly in an engine assembly of a machine, where the accumulator assembly further includes an accumulator body and a fuel line adapter connected thereto, and the accumulator assembly is mountable to a cylinder head of the engine assembly with an injector end of the accumulator body disposed within a cylinder head accumulator bore of the cylinder head, the accumulator clamp comprising:
a clamp body having a clamp body front surface, a clamp body rear surface, a clamp body bottom surface, a clamp body top surface, a clamp body first side surface and a clamp body second side surface;
a clamp accumulator bore extending through the clamp body from the clamp body bottom surface to the clamp body top surface, wherein the clamp accumulator bore is shaped to receive a fuel line adapter connection end of the accumulator body inserted into the clamp accumulator bore through the clamp body bottom surface;
a first bolt bore extending through the clamp body proximate the clamp body first side surface from the clamp body bottom surface to the clamp body top surface, wherein a first bolt bore inner diameter of the first bolt bore is greater than a first mounting bolt outer diameter of a first accumulator mounting bolt extending from the cylinder head adjacent the cylinder head accumulator bore;
a first bolt slot through the clamp body from the first bolt bore to the clamp body front surface, with the first bolt slot extending upwardly from the clamp body bottom surface and having a first bolt slot width that is greater than the first mounting bolt outer diameter;
a second bolt bore extending through the clamp body proximate the clamp body second side surface from the clamp body bottom surface to the clamp body top surface, wherein a second bolt bore inner diameter of the second bolt bore is

Assignees

• Caterpillar Inc

Inventors

• Carlson Joshua David

Classifications

• F02M2200/856

  characterised by mounting injector to fuel or common rail, or vice versa · CPC title

• F02M61/14 Primary

  Arrangements of injectors with respect to engines; Mounting of injectors · CPC title

• F02M63/0003

  Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure (having a distributor F02M41/16; low pressure fuel injection F02M69/14) · CPC title

• F02M2200/855

  using clamp elements or fastening means, e.g. bolts or screws · CPC title