U.S. patent application number 12/064403 was filed with the patent office on 2009-04-02 for oil flow passage structure of cylinder block.
This patent application is currently assigned to HINO MOTORS LTD.. Invention is credited to Kenji Hisatomi.
Application Number | 20090084343 12/064403 |
Document ID | / |
Family ID | 37771626 |
Filed Date | 2009-04-02 |
United States Patent
Application |
20090084343 |
Kind Code |
A1 |
Hisatomi; Kenji |
April 2, 2009 |
OIL FLOW PASSAGE STRUCTURE OF CYLINDER BLOCK
Abstract
Disclosed is oil flow passage formation in a cylinder block 11
from an oil pump 12 to an oil cooler 13, having a side surface of
the cylinder block 11 on which the oil pump 12 is formed, and an
oil flow passage 14 formed in and along the side surface of the
cylinder block 11 on which the oil pump 12 is formed. This makes it
unnecessary to change the flow direction of the engine oil and
suppresses increase in resistance of the engine oil to cause the
engine oil to flow smoothly.
Inventors: |
Hisatomi; Kenji; (Tokyo,
JP) |
Correspondence
Address: |
OBLON, SPIVAK, MCCLELLAND MAIER & NEUSTADT, P.C.
1940 DUKE STREET
ALEXANDRIA
VA
22314
US
|
Assignee: |
HINO MOTORS LTD.
Hino-shi
JP
|
Family ID: |
37771626 |
Appl. No.: |
12/064403 |
Filed: |
August 24, 2006 |
PCT Filed: |
August 24, 2006 |
PCT NO: |
PCT/JP2006/316565 |
371 Date: |
February 21, 2008 |
Current U.S.
Class: |
123/196R ;
184/6.5 |
Current CPC
Class: |
F01P 11/08 20130101;
F01M 5/002 20130101; F01M 11/02 20130101; F01P 2060/04
20130101 |
Class at
Publication: |
123/196.R ;
184/6.5 |
International
Class: |
F01M 1/00 20060101
F01M001/00 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 25, 2005 |
JP |
2005-244638 |
Claims
1. Oil flow passage formation in a cylinder block from an oil pump
to an oil cooler, comprising an side surface of the cylinder block
on which the oil pump is formed, and an oil flow passage formed in
and along the side surface of the cylinder block on which the oil
pump is formed.
2. Oil flow passage formation in a cylinder block as claimed in
claim 1, wherein the oil cooler is arranged at an upper portion of
the cylinder block.
3. Oil flow passage formation in a cylinder block as claimed in
claim 1, wherein a discharge port from the oil pump to the oil flow
passage is oriented to a discharge direction by drive means of the
oil pump.
4. Oil flow passage formation in a cylinder block as claimed in
claim 2, wherein a discharge port from the oil pump to the oil flow
passage is oriented to a discharge direction by drive means of the
oil pump.
Description
TECHNICAL FIELD
[0001] The present invention relates to oil flow passage formation
in a cylinder block with an oil flow passage.
BACKGROUND ART
[0002] An engine in general is provided, as shown in FIGS. 1 and 2,
with a cylinder block 1 having on its one side an oil pump 2 for
discharge of engine oil from an oil pan (not shown) and having on
the other side an oil cooler (not shown) for cooling of the engine
oil, the cylinder block 1 being formed with an oil flow passage 3
extending from the one side to the other side for delivery of the
engine oil from the oil pump 2 to the oil cooler.
[0003] The oil pump 2 comprises a plurality of (two in FIG. 2)
gears 4, a pump chamber 6 having the gears 4 arranged therein and
formed with a discharge port 5 and a delivery flow passage 7 for
delivery of the engine oil from the oil pan to the pump chamber 6,
the pump chamber 6 and delivery flow passage 7 being provided by
openings 8 and 9 for the pump chamber and delivery flow passage,
respectively, formed on a side surface of the cylinder block 1 and
cover bodies 10 fitted into the openings 8 and 9, respectively. The
discharge port 5 of the pump chamber 6 is formed on a bottom
surface 8a of the opening 8 for the pump chamber at its side edge.
In FIG. 2, only the cover body 10 for the pump chamber is
shown.
[0004] The oil cooler may be of water-cooled type using cooling
water for the engine or may be of air-cooled type using ambient air
just like a radiator.
[0005] When the engine oil is to be delivered from the oil pump 2
to the oil cooler, the gears 4 in the pump 2 are rotated to
discharge the engine oil via the discharge port 5 and deliver the
same into the oil cooler via the oil flow passage 3 in the cylinder
block 1. The discharge of the engine oil from the oil pump 2 is
such that the gears 4 are rotated to cause the engine oil to flow
along the peripheral surface 8b of the opening 8 for the pump
chamber; the engine oil changes its flow direction at a tip of the
pump chamber 6 from toward the peripheral surface 8b of the opening
8 substantially perpendicularly to the bottom surface 8a and is
discharged via the discharge port 5.
[0006] Prior art references in the field of oil cooler, oil pump
and oil flow passage formation are, for example, the following
references 1 and 2.
[0007] [Reference 1] Japanese Utility Model publication No.
2-43406
[0008] [Reference 2] JP 11-125105 A
SUMMARY OF THE INVENTION
Problems to be Solved by the Invention
[0009] However, in such oil flow passage 3 formation, the flow
direction of the engine oil changes from that coplanar with the
cylinder block 1 to that substantially perpendicular thereto when
the engine oil is discharged from the oil pump 2 to the oil flow
passage 3, which disadvantageously increases resistance of the
engine oil, disabling the engine oil to flow smoothly.
[0010] The invention was made in view of the above and has its
object to provide oil flow passage formation of a cylinder block
which enables the engine oil to flow smoothly.
Means or Measures for Solving the Problems
[0011] In order to attain the above-mentioned object, the invention
provides oil flow passage formation in a cylinder block from an oil
pump to an oil cooler, comprising a side surface of the cylinder
block on which the oil pump is formed, and an oil flow passage
formed in and along the side surface of the cylinder block on which
the oil pump is formed.
[0012] In the invention, the oil cooler may be arranged at an upper
portion of the cylinder block.
[0013] In the invention, a discharge port from the oil pump to the
oil flow passage may be oriented to a discharge direction by the
drive means of the oil pump.
[0014] According to the invention, the oil flow passage is formed
in and along the side surface of the cylinder block on which the
oil pump is formed, which can make it unnecessary to change the
flow direction of the engine oil from that coplanar with the
cylinder block to that substantially perpendicular thereto, and can
suppress increase in resistance of the engine oil to cause the
engine oil to flow smoothly.
[0015] When the oil cooler is arranged at the upper portion of the
cylinder block, the oil flow passage for delivery of the engine oil
to the oil cooler may be formed in the side surface on which the
oil pump is formed, which can make it unnecessary to change the
flow direction of the engine oil and can further suppress increase
in resistance of the engine oil to cause the engine oil to flow
smoothly.
[0016] When the discharge port from the oil pump to the oil flow
passage is oriented to the discharge direction by the drive means
of the oil pump, this can make it unnecessary to change the flow
direction of the engine oil and can still further suppress increase
in resistance of the engine oil to cause the engine oil to flow
smoothly.
EFFECTS OF THE INVENTION
[0017] The invention as mentioned in the above can exhibit various
excellent effects and advantages of making it unnecessary to change
the flow direction of the engine oil and suppressing increase in
resistance of the engine oil to cause the engine oil to flow
smoothly.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] FIG. 1 is a schematic view showing conventional oil flow
passage formation in a cylinder block;
[0019] FIG. 2 is an enlarged schematic view showing an oil pump in
the conventional oil flow passage formation in the cylinder
block;
[0020] FIG. 3 is a schematic view showing oil flow passage
formation in a cylinder block according to an embodiment of the
invention; and
[0021] FIG. 4 is an enlarged schematic view showing an oil pump in
the oil flow passage formation in the cylinder block according to
the embodiment of the invention.
EXPLANATION OF THE REFERENCE NUMERALS
[0022] 11 cylinder block [0023] 12 oil pump [0024] 13 oil cooler
[0025] 14 oil flow passage [0026] 15 gear (drive means) [0027] 16
discharge port
BEST MODE FOR CARRYING OUT THE INVENTION
[0028] Next, an embodiment of the invention will be described in
conjunction with the drawings.
[0029] FIGS. 3 and 4 illustrate the embodiment of the
invention.
[0030] In the embodiment of the invention, an engine has a cylinder
block 11 having on its one side an oil pump 12 for discharge of
engine oil from an oil pan (now shown) and an oil cooler 13
arranged at an upper portion of the cylinder block 11 on the side
of the oil pump for cooling of the engine oil, the cylinder block
11 being formed with an oil flow passage 14 extending in and along
a side surface of the cylinder block 11 from the oil pump 12 to the
oil cooler 13.
[0031] The oil pump 12 comprises drive means or a plurality of (two
in FIG. 3) gears 15, a pump chamber 17 having the gears 15 arranged
therein and formed with a discharge port 16 of the engine oil and a
delivery flow passage 18 for delivery of the engine oil from the
oil pan to the pump chamber 17, the pump chamber 17 and delivery
flow passage 18 being provided by openings 19 and 20 for the pump
chamber and the delivery flow passage, respectively, formed on a
side surface of the cylinder block 11 and cover bodies 21 fitted
into the openings 19 and 20, respectively. The discharge port 16 of
the pump chamber 17 is formed on the peripheral surface 19a of the
opening 19 for the pump chamber at a side edge thereof to be
oriented to the discharge direction of the engine oil 15 by the
gears 15 of the oil pump 12 so as to make the flow direction of the
engine oil in the oil pump 12 coplanar with that in the oil flow
passage 14. In FIG. 4, only the cover body 21 fitted to the opening
19 for the pump chamber is shown.
[0032] The oil cooler 13 may be of water-cooled type using cooling
water for engine or may be of air-cooled type using ambient air
just like a radiator.
[0033] Next, a mode of operation of the embodiment according to the
invention will be described.
[0034] When engine oil is to be delivered from the oil pump 12 to
the oil cooler 13, the gears 15 in the oil pump 12 are rotated to
discharge the engine oil via the delivery port 16 and deliver the
same to the oil cooler 13 via the oil flow passage 14 in the
cylinder block 11.
[0035] The discharge of the engine oil from the oil pump 12 is such
that the gears 15 are rotated to cause the engine oil to flow along
the peripheral surface 19a of the opening 19 for the pump chamber,
the engine oil being discharged via the discharge port 16 formed on
the peripheral surface 19a of the opening 19 for the pump chamber
so as to continue to flow coplanar at the tip of the pump chamber
17 without change of the flow direction.
[0036] Thus, according to the embodiment, the oil flow passage 14
from the oil pump 12 to the oil cooler 13 is formed in and along
the side surface of the cylinder block 11 on which the oil pump 12
is formed, which can make it unnecessary to change the flow
direction of the engine oil from that coplanar with the cylinder
block 11 to that substantially perpendicular thereto and can
suppress increase in resistance of the engine oil to cause the
engine oil to flow smoothly.
[0037] When the oil cooler 13 is arranged at the upper portion of
the cylinder block 11, the oil flow passage 14 for delivery of the
engine oil to the oil cooler 13 can be formed in the side surface
on which the oil pump 12 is formed, which fact can make it
unnecessary to change the flow direction of the engine oil and can
further suppress increase in resistance of the engine oil to cause
the engine oil to flow smoothly.
[0038] When the discharge port 16 from the oil pump 12 to the oil
flow passage 14 is oriented to the discharge direction by the drive
means of the oil pump 12, this can make it unnecessary to change
the flow direction of the engine oil and can further suppress
increase in resistance of the engine oil to cause the engine oil to
flow smoothly.
[0039] It is to be understood that oil flow passage formation of a
cylinder block according to the invention is not limited to the
above-mentioned embodiment and that various changes and
modifications may be made without leaving the spirit of the
invention.
INDUSTRIAL APPLICABILITY
[0040] Oil flow passage formation in a cylinder block according to
the invention is applicable to various engines.
* * * * *