Rocker base for valve actuation system

Patent metadata

Field	Value
Publication number	US-9816405-B2
Application number	US-201514869269-A
Country	US
Kind code	B2
Filing date	Sep 29, 2015
Priority date	Sep 29, 2015
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A rocker base is disclosed for use with a valve actuation system. The rocker base may have a housing with a top, a bottom, side walls connecting the top to the bottom, and end walls disposed between the side walls. The rocker base may also have rocker arm supports located inside the housing and integrally formed with the side walls, and an injector spring pad extending from one of the end walls toward a center of the housing. The rocker base may further have a rib connecting the injector spring pad to one of the rocker arm supports.

First claim

What is claimed is:

1. A rocker base, comprising:
a housing having a top, a bottom, side walls connecting the top to the bottom, and end walls disposed between the side walls;
rocker arm supports located inside the housing and integrally formed with the side walls;
an injector spring pad extending from one of the end walls toward a center of the housing; and
first and second ribs, the first rib extends from a first of the rocker arm supports to the injector spring pad, the second rib that extends from a second of the rocker arm supports to the injector spring pad, wherein the first and second ribs form a general V-shape, the first and second ribs have a generally flat bottom surface and a top surface that tapers toward the injector spring pad, wherein an interior angle between the first and second ribs is about 110-115°; and
a wiring harness recess formed in the generally flat bottom surface of the first and second ribs, wherein:
open spaces exist inside the housing at areas adjacent the injector spring pad;
the injector spring pad includes an injector pushrod through-hole and a width of the injector spring pad between the injector pushrod through-hole and the sides of the injector spring pad is about 7-8 mm; and
the sides of the injector spring pad at the open spaces are concave.

2. The rocker base of claim 1 , wherein the injector spring pad is centered between the rocker arm supports.

3. The rocker base of claim 1 , wherein the injector spring pad is generally plate-like, and inclined toward the top of the housing.

4. The rocker base of claim 3 , wherein the injector spring pad is inclined by about 9-10° relative to the top of the housing.

5. A rocker base, comprising:
a housing having a top, a bottom, side walls connecting the top to the bottom, and end walls disposed between the side walls;
first and second rocker arm supports located inside the housing and integrally formed with the side walls;
an injector spring pad extending from one of the end walls toward a center of the housing, the injector spring pad being centered between the first and second rocker arm supports and inclined toward the top of the housing; and
first and second ribs connecting the injector spring pad to the first and second rocker arm supports, wherein:
the first and second ribs form a general V-shape; and
open spaces exist inside the housing at areas adjacent the injector spring pad.

6. The rocker base of claim 5 , wherein at least one of the first and second ribs has a generally flat bottom surface, a top surface that tapers toward the injector spring pad, and a wiring harness recess formed in the generally flat bottom surface.

7. The rocker base of claim 5 , further including:
a tab extending from the injector spring pad toward the center of the housing; and
a wiring harness mounting hole formed in the tab.

8. An engine, comprising:
an engine block;
a cylinder head connected to the engine block;
a valve actuation system configured to selectively open passages in the cylinder head; and
a rocker base connected to the cylinder head and configured to house the valve actuation system, the rocker base including:
a housing having a top, a bottom configured to engage the cylinder head, side walls connecting the top to the bottom, and end walls disposed between the side walls;
first and second rocker arm supports located inside the housing, being integrally formed with the side walls, and configured to support the valve actuation system;
an injector spring pad extending from one of the end walls toward a center of the housing, the injector spring pad being centered between the first and second rocker arm supports and inclined toward the top of the housing; and
first and second ribs connecting the injector spring pad to the first and second rocker arm supports, wherein:
the first and second ribs form a general V-shape; and
open spaces exist inside the housing at areas adjacent the injector spring pad.

9. The engine of claim 8 , wherein at least one of the first and second ribs has a generally flat bottom surface, a top surface that tapers toward the injector spring pad, and a wiring harness recess formed in the generally flat bottom surface.

10. The engine of claim 8 , further including:
a tab extending from the injector spring pad toward the center of the housing; and
a wiring harness mounting hole formed in the tab.

Assignees

• Caterpillar Inc

Inventors

• Kizhakkethara Indrajith
• Nagaraj Prabhu
• Masala Mallikarjuna
• Pipis Jr John S
• Snelling Karen E
• Motyl Michael J

Classifications

• F01L2305/00

  Valve arrangements comprising rollers · CPC title

• F01L2303/01

  Tools for producing, mounting or adjusting, e.g. some part of the distribution · CPC title

• F01L2820/01

  Absolute values · CPC title

• F01L3/22

  Valve-seats not provided for in preceding subgroups of this group; Fixing of valve-seats · CPC title

• F01L3/10

  Connecting springs to valve members · CPC title