U.S. patent number 3,853,099 [Application Number 05/317,416] was granted by the patent office on 1974-12-10 for elastomeric sealing ring for cylinder liners.
This patent grant is currently assigned to Caterpillar Tractor Co.. Invention is credited to Glen N. Feather, Harry M. Kiley, William A. Nelson.
United States Patent |
3,853,099 |
Feather , et al. |
December 10, 1974 |
**Please see images for:
( Certificate of Correction ) ** |
ELASTOMERIC SEALING RING FOR CYLINDER LINERS
Abstract
An internal combustion engine comprises a cylinder block having
a head mounted thereon and a plurality of cylinder liners mounted
in the block. Interconnecting passages continuously circulate a
coolant through the block and head and around each liner during
engine operation. An annular elastomeric seal is disposed between
the cylinder block and each liner, adjacent to the head, to prevent
the passage of coolant thereby. A venturi throat is defined in the
passages, closely adjacent to the seal, to increase the velocity of
coolant flow thereat.
Inventors: |
Feather; Glen N. (Dunlap,
IL), Kiley; Harry M. (Peoria, IL), Nelson; William A.
(Peoria, IL) |
Assignee: |
Caterpillar Tractor Co.
(Peoria, IL)
|
Family
ID: |
23233546 |
Appl.
No.: |
05/317,416 |
Filed: |
December 21, 1972 |
Current U.S.
Class: |
123/41.82R;
123/41.84; 123/193.3 |
Current CPC
Class: |
F02F
11/005 (20130101); F02F 1/166 (20130101); F02F
1/16 (20130101) |
Current International
Class: |
F02F
1/02 (20060101); F02F 1/16 (20060101); F02F
11/00 (20060101); F02f 001/36 () |
Field of
Search: |
;123/193H,193R,193CH,193C,41.84,41.82 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Antonakas; Manuel A.
Assistant Examiner: O'Connor; Daniel J.
Attorney, Agent or Firm: Phillips, Moore, Weissenberger
Lempio & Strabala
Claims
What is claimed is:
1. In an internal combustion engine having a cylinder block, a
cylinder head mounted on said block, a cylindrical bore formed in
said block, a cylindrical one-piece liner mounted in said bore and
having an upper, radial flange seating on a top surface of said
block and an axially spaced lower radial flange defining an annular
groove therebetween, said lower flange having a free end closely
fitted within said bore, interconnecting passage means defined in
said block and said head around said liner for continuously
circulating a coolant therethrough during engine operation, said
passage means further including a venturi throat means solely
defined between siad lower radial flange and said liner, closely
adjacent to and below said sealing means, to increase the velocity
of coolant flow therethrough and further including a pair of
gaskets and a spacer plate sandwiched between said gaskets, said
gaskets and spacer plate mounted between said block and head and
having aligned openings therein which serve as a continuation of
said passage means between said block and head, an elastomeric
sealing ring disposed in said annular groove and compressed between
siad block and said liner, adjacent to said head preventing the
passage of coolant between said seating and said free end and said
bore. closely adjacent to the sealing means to increase the
velocity of coolant flow therethrough.
BRIEF DESCRIPTION OF THE DRAWING
Description
BACKGROUND OF THE INVENTION
Conventional internal combustion engines comprise interconnecting
passages formed in their blocks and heads for circulating a coolant
around their cylinder liners during engine operation. Each cylinder
liner normally comprises an upper, radial flange which is seated on
the block. The high operating temperatures encountered at such seat
tend to deteriorate same, resulting in a loosening of the head
gasket. Certain chemical inhibitors, mixed into the circulated
coolant, tend to accelerate such deterioration due to their
corrosive effect, particularly at high temperature levels.
SUMMARY OF THIS INVENTION
An object of this invention is to overcome the above, briefly
described problems by providing a strategically positioned annular
elastomeric sealing means between the cylinder block and liner of
an internal combustion engine. The sealing means is compressed to
maintain a positive seal thereat during all phases of engine
operation wherein metallic parts are subjected to thermal expansion
and contraction.
In the preferred embodiment of this invention, a venturi throat,
defined in coolant-carrying passages formed in the block, is
positioned closely adjacent to the sealing means to increase the
velocity of coolant flow therethrough.
BRIEF DESCRIPTION OF THE DRAWING
Other objects of this invention will become apparent from the
following description and accompanying drawing which is a cross
sectional view of a cylinder and attendant structures employed in
an internal combustion engine.
DETAILED DESCRIPTION
FIG. 1 partially illustrates an internal combustion engine
comprising a cylinder block 10 having a plurality of cylinder bores
(one shown) defined in part by an annular wall 11 formed on the
block. Annular chambers 12 and 13 are also defined in the block to
circumvent the cylinder bore to form a portion of interconnectd
passage means for circulating a coolant through the engine during
its operation. The passage means further comprises a passageway 14
aligned with openings formed through a metallic gasket 15, a spacer
16, a head gasket 17 and a cylinder head 18. Gasket 15 and spacer
16 are seated on a deck 19 of the block and have a recessed bore 20
formed therethrough which has a diameter slightly larger than the
diameter of the cylinder bore.
A cylindrical liner 21 is disposed in the cylinder bore and has an
upper radial flange 22 formed thereon to have its bottom surface 23
seated on deck 19. An annular groove 24 facilitates the
roll-forming of a flange radius 25 on the liner to increase the
structural integrity thereat. The groove is defined between flange
22 and an axially spaced second flange 26, having an outer surface
27 of slightly smaller diameter, closely fitted within wall 11.
An annular elastomeric sealing means, such as single ring seal 28,
is closely fitted within groove 24 and is compressed radially
between the liner and wall 11. Thus, the ring seal prevents the
leakage of coolant upwardly from chamber 13 to flange 22,
notwithstanding the slight circumferential clearance defined
between outer surface 27 of flange 26 and wall 11. The ring seal
may comprise a suitably composed elastomeric material, such as a
rubber or plastic based material, which will retain is elastomeric
and thermal resistant properties over an extended period of
time.
An annular baffle 29 forms a "venturi throat" 30 between chambers
12 and 13 to increase the velocity of coolant flow therethrough.
Such increased coolant flow will aid in quickly dissipating heat at
the hottest area of the cylinder. A pair of O-ring seals 31,
disposed in grooves 32 formed at the lower end of the liner, are
compressed against bore 11 for coolant sealing purposes
thereat.
* * * * *