Rib structure on cylinder block

Patent metadata

Field	Value
Publication number	US-12467418-B2
Application number	US-202218290335-A
Country	US
Kind code	B2
Filing date	Aug 4, 2022
Priority date	Aug 26, 2021
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

The present application relates to rib structure on cylinder block. A cylinder block having a top surface, an inner bottom surface, a cylinder opening on the top surface, and a head boss positioned on the top surface, centered on a first axis, and configured to engage with a fastener at an initial position, which defines a first depth. The cylinder block includes a first main boss positioned on the inner bottom surface, centered on a second axis, and configured to engage with a first main fastener at a first end position, which defines a second depth. The cylinder block includes a second main boss positioned on the inner bottom surface and configured to engage with a second main fastener at a second end position, which defines a third depth. The cylinder block includes a first rib path extending from the first depth to the second depth and a second rib path extending from the first depth to the third depth.

First claim

What is claimed is:

1 . A cylinder block, comprising:
a cylinder block body having a top surface, an inner bottom surface axially opposed from the top surface, and an exterior profile, the cylinder block body comprising:
a cylinder opening disposed on the top surface, the cylinder opening having a cylinder axis;
a first head boss disposed on the top surface, the first head boss centered on a first axis, the first head boss configured to threadingly engage with a first head fastener at a first initial position, the first initial position defining a first depth away from the top surface;
a first main boss disposed on the inner bottom surface, the first main boss centered on a second axis parallel to or coaxial with the first axis, the first main boss configured to threadingly engage with a first main fastener at a first end position, the first end position defining a second depth from the inner bottom surface;
a second main boss disposed on the inner bottom surface, the second main boss centered on a third axis parallel to the first axis, the second main boss configured to threadingly engage with a second main fastener at a second end position, the second end position defining a third depth from the inner bottom surface;
a second head boss disposed on the top surface, the second head boss centered on a fourth axis parallel to or coaxial with the third axis, the second head boss configured to threadingly engage with a second head fastener at a second initial position, the second initial position defining a fourth depth from the top surface;
the exterior profile defining a set of rib paths comprising:
a first rib path extending from the first depth to the second depth;
a second rib path extending from the first depth to the third depth; and
a third rib path extending from the fourth depth to the third depth;

wherein the first rib path and the second rib path include additional material having a first width, the first width larger than a second width of a wall of the cylinder block, the additional material extending radially away from the cylinder axis.

2 . The cylinder block of claim 1 , wherein the set of rib paths further comprises a fourth rib path extending from the fourth depth to the second depth.

3 . The cylinder block of claim 2 , wherein:
a length of the first depth is equal to a length of the fourth depth; and the fourth rib path intersects with the second rib path.

4 . The cylinder block of claim 1 , wherein a length of the second depth is equal to a length of the third depth.

5 . The cylinder block of claim 1 , wherein the cylinder axis is parallel to the first axis and parallel to the third axis.

6 . The cylinder block of claim 1 , wherein:
a center of the first main boss and a center of the cylinder opening define a first distance, a center of the second main boss and the center of the cylinder opening define a second distance, and the second distance is equal to the first distance.

7 . The cylinder block of claim 1 , wherein the first rib path and the second rib path extend radially away from the cylinder opening.

8 . The cylinder block of claim 1 , wherein:
a wall of the cylinder block body is composed of a first material, and the first rib path is composed of a second material.

9 . A cylinder block, comprising:
a cylinder block body comprising:
a cylinder opening having a cylinder axis;
a top surface;
an inner bottom surface positioned axially opposed from the top surface;
a first head boss disposed on the top surface, the first head boss centered on a first axis, the first head boss having a first counter bore positioned a first depth into the top surface;
a first main boss disposed on the inner bottom surface, the first main boss centered a second axis parallel to or coaxial with the first axis, the first main boss having a first fastening means positioned a second depth into the inner bottom surface;
a second main boss disposed on the inner bottom surface, the second main boss centered on a third axis parallel to the first axis, the second main boss having a second fastening means positioned a third depth into the inner bottom surface;
a second head boss disposed on the top surface, the second head boss centered on a fourth axis parallel to or coaxial with the second axis, the second head boss having a second counter bore positioned a fourth depth into the top surface;
a first reinforced area extending from the first depth to the second depth;
a second reinforced area extending from the first depth to the third depth; and
a third reinforced area extending from the fourth depth to the third depth;
wherein the first reinforced area, the second reinforced area, and the third reinforced area are positioned on an exterior wall of the cylinder block body; and
wherein the first reinforced area and the second reinforced area include additional material having a first width, the first width larger than a second width of a wall of the cylinder block, the additional material extending radially away from the cylinder axis.

10 . The cylinder block of claim 9 , wherein the cylinder block body further comprises a fourth reinforced area extending from the fourth depth to the second depth.

11 . The cylinder block of claim 10 , wherein:
a length of the first depth is equal to a length of the fourth depth; and the fourth reinforced area intersects with the second reinforced area.

12 . The cylinder block of claim 9 , wherein a length of the second depth is equal to a length of the third depth.

13 . The cylinder block of claim 9 , wherein the cylinder axis is parallel to the first axis and parallel to the third axis.

14 . The cylinder block of claim 13 , wherein:
a center of the first main boss and a center of the cylinder opening define a first distance, a center of the second main boss and the center of the cylinder opening define a second distance, and the second distance is equal to the first distance.

15 . The cylinder block of claim 9 , wherein the first reinforced area and the second reinforced area extend radially away from the first axis.

16 . The cylinder block of claim 9 , wherein:
a wall of the cylinder block body comprises a first material, and the first reinforced area comprises a second material.

17 . The cylinder block of claim 9 , wherein the first reinforced area and the second reinforced area comprise cylinder ribs formed into the cylinder block body.

18 . The cylinder block of claim 11 , wherein the cylinder block body further comprises:
a plurality of cylinder openings; a plurality of sets of head fasteners disposed on the top surface, each of the plurality of sets of head fasteners positioned circumferentially around a respective cylinder opening of the plurality of cylinder openings; and a plurality of sets of main fasteners disposed on the inner bottom surface, each of the plurality of sets of main fasteners positioned circumferentially around a respective cylinder opening of the plurality of cylinder openings.

19 . The cylinder block body of claim 18 , wherein:
a first set of head fasteners comprises a first head fastener, a second head fastener, a third head fastener, and a fourth head fastener, the first set of head fasteners positioned circumferentially around a first cylinder opening of the plurality of cylinder openings, and a second set of head fasteners comprises the first head fastener, the second head fastener, a fifth head fastener, and a sixth head fastener, the second set of head fasteners positioned

Assignees

• Cummins Inc

Inventors

• Luo Yuan
• Zhou Xiling

Classifications

• F02F7/0007 Primary

  Crankcases of engines with cylinders in line · CPC title

• F02B75/20

  with cylinders all in one line · CPC title

• F02F2007/0063

  Head bolts; Arrangements of cylinder head bolts · CPC title

• F02F2007/0041

  Fixing Bolts · CPC title

• F02F7/0024

  Casings for larger engines · CPC title