Cylinder block and internal combustion engine system

Patent metadata

Field	Value
Publication number	US-2025059930-A1
Application number	US-202418936345-A
Country	US
Kind code	A1
Filing date	Nov 4, 2024
Priority date	May 6, 2022
Publication date	Feb 20, 2025
Grant date	—

Abstract

A cylinder block includes a cylinder block body and a load path structure. The cylinder block body defines a first cylinder block upper bore. The load path structure includes a first support rib having a first support rib body interfacing with the first cylinder block upper bore. The load path structure is configured to transfer a load from the first cylinder block upper bore along a non-linear path within the cylinder block body away from the first cylinder block upper bore.

First claim

1 . A cylinder block comprising:
a cylinder block body defining a first cylinder block upper bore; and a load path structure comprising a first support rib having a first support rib body interfacing with the first cylinder block upper bore, the load path structure being configured to transfer a load from the first cylinder block upper bore along a non-linear path within the cylinder block body away from the first cylinder block upper bore.

2 . The cylinder block of claim 1 , further comprising a first cylinder skirt portion contiguous with the first support rib;
wherein the cylinder block body defines a second cylinder block upper bore; wherein the load path structure further comprises a second support rib contiguous with the first cylinder skirt portion and separated from the first support rib by the first cylinder skirt portion, the second support rib comprising a second support rib body; and wherein the first support rib, the first cylinder skirt portion, and the second support rib cooperate to define a cylinder wall cavity.

3 . The cylinder block of claim 2 , further comprising a first cylinder block cylinder portion;
wherein the first cylinder block upper bore is disposed adjacent the first cylinder block cylinder portion; and wherein the second cylinder block upper bore is disposed adjacent the first cylinder block cylinder portion.

4 . The cylinder block of claim 3 , further comprising a second cylinder block cylinder portion;
wherein the second cylinder block upper bore is disposed between the first cylinder block cylinder portion and the second cylinder block cylinder portion.

5 . The cylinder block of claim 1 , wherein:
the load path structure further comprises a second support rib having a second support rib body; the cylinder block body defines a second cylinder block upper bore; the second support rib body interfaces with the second cylinder block upper bore; and the load path structure is configured to transfer a second load from the second cylinder block upper bore along a second non-linear path within the cylinder block body away from the second cylinder block upper bore.

6 . The cylinder block of claim 5 , wherein the first support rib and the second support rib are disposed along the same side of the cylinder block.

7 . The cylinder block of claim 5 , further comprising a cylinder skirt portion extending between the first support rib body and the second support rib body, the cylinder skirt portion being recessed relative to the first support rib body and the second support rib body.

8 . The cylinder block of claim 5 , wherein the first support rib and the second support rib are disposed along opposite sides of the cylinder block.

9 . The cylinder block of claim 8 , further comprising:
a first cylinder block cylinder portion; and a second cylinder block cylinder portion; wherein the first support rib and the second support rib are aligned along an axis that extends between the first cylinder block cylinder portion and the second cylinder block cylinder portion.

10 . The cylinder block of claim 9 , further comprising a cylinder block recess extending around the first cylinder block cylinder portion, between the first support rib and the first cylinder block cylinder portion, between the second support rib and the first cylinder block cylinder portion, between the first cylinder block cylinder portion and the second cylinder block cylinder portion, and between the first support rib and the second support rib.

11 . The cylinder block of claim 9 , further comprising a jacket channel extending between the first cylinder block cylinder portion and the second cylinder block cylinder portion.

12 . The cylinder block of claim 2 , wherein the first support rib and the second support rib are aligned across the cylinder block.

13 . The cylinder block of claim 2 ,
wherein the first support rib is angled towards the second support rib.

14 . An internal combustion engine system comprising:
the cylinder block of claim 1 ; a cylinder head; and an upper fastener coupling the cylinder head to the cylinder block, the upper fastener threadably engaged with the first cylinder block upper bore; wherein the first support rib transfers forces from the upper fastener away from the cylinder head.

15 . A cylinder block comprising:
a cylinder block body defining a first cylinder block upper bore and a second cylinder block upper bore; a load path structure comprising:
a first support rib having a first support rib body interfacing with the first cylinder block upper bore, the first support rib extending away from the cylinder block body in a direction that is parallel to the first cylinder block upper bore, and
a second support rib having a second support rib body interfacing with the second cylinder block upper bore, the second support rib extending away from the cylinder block body in a direction that is parallel to the second cylinder block upper bore; and
a cylinder skirt portion extending between the first support rib body and the second support rib body, the cylinder skirt portion being recessed relative to the first support rib and the second support rib.

16 . The cylinder block of claim 15 , wherein the cylinder block body, the load path structure, and the cylinder skirt portion are integrally formed with one another.

17 . The cylinder block of claim 15 , wherein:
the cylinder block body further defines a first cylinder block lower bore and a second cylinder block lower bore; the first cylinder block upper bore and the second cylinder block upper bore are aligned in a first direction; and the first cylinder block lower bore and the second cylinder block lower bore are aligned in a second direction that is parallel to the first direction.

18 . An internal combustion engine system comprising:
the cylinder block of claim 17 ; a cylinder head; an upper fastener coupling the cylinder head to the cylinder block, the upper fastener threadably engaged with the first cylinder block upper bore; a main cap; and a lower fastener coupling the main cap to the cylinder block, the lower fastener threadably engaged with the first cylinder block lower bore.

19 . The internal combustion engine system of claim 18 , wherein:
the first cylinder block upper bore is centered on a first axis; and the first cylinder block lower bore is centered on a second axis that is parallel to the first axis.

20 . The internal combustion engine system of claim 19 , wherein:
the cylinder block further comprises:
a first cylinder block cylinder portion, and
a cylinder block recess extending around the first cylinder block cylinder portion;
the first axis extends through the cylinder block recess; and the second axis extends through the cylinder block recess.

Assignees

• Cummins Inc

Inventors

• Kulkarni Snehal
• Kumareshan Vijaysai Karuppiah
• Madigan Patricia
• Hassall Nathaniel P
• Barnes David M
• Downey Eric R

Classifications

• F02F2007/0041

  Fixing Bolts · CPC title

• F02F7/0021 Primary

  Construction · CPC title

• F02F7/0007 Primary

  Crankcases of engines with cylinders in line · CPC title