Cover member of internal combustion engine

Patent metadata

Field	Value
Publication number	US-10107230-B2
Application number	US-201615293282-A
Country	US
Kind code	B2
Filing date	Oct 14, 2016
Priority date	Oct 16, 2015
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

A cover of an internal combustion engine includes a cover body to be mounted to a crankcase of the internal combustion engine. The cover body includes a through hole, a protruding part, and a plurality of first recessed grooves. The through hole is to support a shaft rotatably. The protruding part is provided above the through hole in an upward direction of the internal combustion engine and protrudes toward an inside of the cover body facing the crankcase. The protruding part includes a first upper part and a first lower part in the upward direction on an inner surface of the protruding part facing the crankcase. The plurality of first recessed grooves extend radially from the through hole so as to connect the upper part and the lower part of the protruding part.

First claim

What is claimed is:

1. A cover member to be mounted on a crankcase of an internal combustion engine comprising a first through hole for rotatably supporting a first shaft, a protruding part being positioned above the first through hole and protruding toward an inside of the cover member, and a plurality of first recessed grooves extending radially from the first through hole so as to provide a connection between an upper part and a lower part of an inner surface side of the protruding part, wherein the cover member further comprises a second through hole for supporting a second shaft, wherein the protruding part extends from the first through hole to the second through hole, and wherein a cross-sectional area of at least one first recessed groove of the plurality of first recessed grooves reduces continuously from the second through hole towards the first through hole.

2. The cover member according to claim 1 , further comprising a plurality of second recessed grooves which extend radially from the first through hole so as to provide a connection between an upper part and a lower part of an outer surface side of the protruding part, wherein a cross section of the protruding part is formed in a corrugated plate shape by the first recessed grooves on the inner surface side and the second recessed grooves on the outer surface side.

3. The cover member according to claim 1 , wherein the plurality of first recessed grooves on the inner surface side are reduced in groove cross sectional area toward the first through hole.

4. The cover member according to claim 1 , wherein the internal combustion engine has a dry sump type lubrication system which includes a scavenging pump configured to collect an oil of a bottom part of the crankcase into a reserve tank, and a feed pump configured to feed the oil of the reserve tank to a part to be lubricated.

5. The cover member according to claim 1 , further comprising a plurality of outer recessed grooves provided on an outer surface of the cover member and extending radially from the first through hole.

6. A cover of an internal combustion engine, comprising: a cover body to be mounted to a crankcase of the internal combustion engine, the cover body comprising: a first through hole to support a first shaft rotatably; a protruding part provided above the first through hole in an upward direction of the internal combustion engine and protruding toward an inside of the cover body facing the crankcase, the protruding part including a first upper part and a first lower part in the upward direction on an inner surface of the protruding part facing the crankcase; and a plurality of first recessed grooves extending radially from the first through hole so as to connect the first upper part and the first lower part of the protruding part wherein the cover body further comprises a second through hole for supporting a second shaft, wherein the protruding part extends from the first through hole to the second through hole, and wherein a cross-sectional area of at least one first recessed groove of the plurality of first recessed grooves reduces continuously from the second through hole towards the first through hole.

7. The cover according to claim 6 , the protruding part including a second upper part and a second lower part in the upward direction of the internal combustion engine on an outer surface of the protruding part facing toward an outward direction of the internal combustion engine; the cover further comprising: a plurality of second recessed grooves extending radially from the first through hole so as to connect the second upper part and the second lower part, wherein the first recessed grooves and the second recessed grooves are shaped such that a cross section of the protruding part is in a corrugated plate shape.

8. The cover according to claim 6 , wherein the first recessed grooves are reduced in groove cross sectional area toward the first through hole.

9. The cover according to claim 6 , wherein the internal combustion engine has a dry sump lubrication system which includes a scavenging pump configured to collect an oil of a bottom part of the crankcase into a reserve tank, and a feed pump configured to feed the oil of the reserve tank to a part to be lubricated.

10. The cover according to claim 6 , further comprising a plurality of second recessed grooves provided on an outer surface of the cover body and extending radially from the first through hole.

11. A cover of an internal combustion engine, comprising: a cover body to be mounted to a crankcase of the internal combustion engine, the cover body comprising: a first through hole having a center axis to rotatably support a first shaft about the center axis, the cover body having an axial direction in which the center axis extends and a radial direction perpendicular to the axial direction, the cover body having a cover body inner surface to face the crankcase and a cover body outer surface opposite to the cover body inner surface in the axial direction, the axial direction including an inward direction directed from the cover body outer surface to the cover body inner surface; a protruding part which is connected to the cover body and positioned apart from the first through hole in the radial direction, the protruding part protruding from the cover body inner surface in the inward direction, the protruding part having a protruding part inner surface connected to the cover body inner surface and a protruding part outer surface connected to the cover body outer surface, the protruding part inner surface having a first inner periphery facing the first through hole in the radial direction and a first outer periphery opposite to the first inner periphery in the radial direction; and a plurality of inner recessed grooves extending in the radial direction from the first outer periphery of the protruding part to the first inner periphery of the protruding part, wherein the cover body further comprises a second through hole for supporting a second shaft, wherein the protruding part extends from the first through hole to the second through hole, and wherein a cross-sectional area of at least one inner recessed groove of the plurality of inner recessed grooves the protruding part reduces continuously from the second through hole towards the first through hole.

12. The cover according to claim 11 , the protruding part outer surface having a second inner periphery facing the first through hole in the radial direction and a second outer periphery opposite to the second inner periphery in the radial direction, the cover body further comprising: a plurality of outer recessed grooves extending in the radial direction from the second outer periphery of the protruding part to the second inner periphery of the protruding part, wherein the inner recessed grooves and the outer recessed grooves are shaped such that a cross section of the protruding part is in a corrugated plate shape.

13. The cover member according to claim 11 , wherein a groove cross sectional area of the inner recessed grooves taken along a plane perpendicular to the radial direction are smaller as the groove cross sectional area approaches closer to the first through hole in the radial direction.

14. The cover member according to claim 11 , wherein the internal combustion engine has a dry sump lubrication system which includes a scavenging pump configured to collect an oil of a bottom part of the crankcase into a reserve tank, and a feed pump configured to feed the oil of the reserve tank to a part to be lubricated.

15. The cover according to claim 11 , further comprising a plurality of outer recessed grooves pr

Assignees

• Honda Motor Co Ltd

Inventors

• Koiwa Yojiro

Classifications

• F02F2007/0075

  Front covers · CPC title

• F02F2007/0078

  Covers for belt transmissions · CPC title

• F01M9/08

  Drip lubrication · CPC title

• F02F7/0073 Primary

  Adaptations for fitting the engine, e.g. front-plates or bell-housings · CPC title

• F01M11/0004

  Oilsumps · CPC title