US7191740B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 2002-10-23
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Granted: 2007-03-20
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Expires: 2022-10-23
Abstract
Abstract A cooling block forming a top wall of a combustion chamber of an internal combustion engine is formed by layering, from the outside to the inside, a casing, an upper layer block, a middle layer block, and a lower layer block. Labyrinth-shaped cooling water passages are formed on upper side faces of the three layers of blocks, and cooling water supplied from a cooling water supply passage flows from the cooling water passage on the side far from the combustion chamber to the cooling water passage on the side close to the combustion chamber, and is discharged from a cooling water discharge passage. Since the cooling water flows in a direction opposite to the direction of emission of heat of combustion from the combustion chamber, it is possible to ensure that there is sufficient difference in temperature between a cylinder head and the cooling water throughout the cooling water passages.
Inventors
- 👤 Atsushi Baba
- 👤 Tsuneo Endoh
- 👤 Masashi Shinohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:03
CPC Classifications
F; F02; F02G; F02G5/00; F02G5/02; F01; F01P; F01P3/00; F01P3/02; F02F; F02F1/00; F02F1/24; F02F1/26; F02F1/36; F02F1/38; F02F1/40; F01P2003/024; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
145 words
An internal combustion engine comprising: a cylinder head; a combustion chamber having a top wall of a non-planar shape; and a cooling water passage for cooling heat of combustion transferred from the combustion chamber to the cylinder head, the cooling water passage being provided within the cylinder head and above the combustion chamber; wherein the cooling water passage is formed in multiple layers so as to cover the combustion chamber, and cooling water within the cooling water passage flows from a layer on the side far from the combustion chamber toward a layer on the side close to the combustion chamber so as to oppose the direction of emission of the heat of combustion from the combustion chamber; and wherein the multiple layers forming the cooling water passage are each shaped to correspond to a shape of the non-planar top wall of the combustion chamber.
Claim 2
Dependent Claim
145 words
An internal combustion engine comprising: a cylinder head; a combustion chamber having a top wall of a non-planar shape; and a cooling water passage for cooling heat of combustion transferred from the combustion chamber to the cylinder head, the cooling water passage being provided within the cylinder head and above the combustion chamber; wherein the cooling water passage is formed in multiple layers so as to cover the combustion chamber, and cooling water within the cooling water passage flows from a layer on the side far from the combustion chamber toward a layer on the side close to the combustion chamber so as to oppose the direction of emission of the heat of combustion from the combustion chamber; and wherein the multiple layers forming the cooling water passage are each shaped to correspond to a shape of the non-planar top wall of the combustion chamber.
Claim 3
Dependent Claim
37 words
The internal combustion engine according to claim 1 , wherein cooling water that has passed through the cooling water passage and whose temperature has thereby been increased is used as a heat source for other auxiliary equipment.
Claim 4
Dependent Claim
27 words
The internal combustion engine according to claim 1 , wherein each of the multiple layers forming the cooling water passage is formed of a substantially conical shape.
Claim 5
Dependent Claim
134 words
An internal combustion engine comprising: a cylinder head; a combustion chamber; and a cooling water passage for cooling heat of combustion transferred from the combustion chamber to the cylinder head, the cooling water passage being provided within the cylinder head and above the combustion chamber; wherein the cooling water passage is formed in multiple layers so as to cover the combustion chamber, and cooling water within the cooling water passage flows from a layer on the side far from the combustion chamber toward a layer on the side close to the combustion chamber so as to oppose the direction of emission of the heat of combustion from the combustion chamber; and wherein the multiple layers forming the cooling water passage are defined in a plurality of separate members which are layered one on another.
Claim 6
Dependent Claim
134 words
An internal combustion engine comprising: a cylinder head; a combustion chamber; and a cooling water passage for cooling heat of combustion transferred from the combustion chamber to the cylinder head, the cooling water passage being provided within the cylinder head and above the combustion chamber; wherein the cooling water passage is formed in multiple layers so as to cover the combustion chamber, and cooling water within the cooling water passage flows from a layer on the side far from the combustion chamber toward a layer on the side close to the combustion chamber so as to oppose the direction of emission of the heat of combustion from the combustion chamber; and wherein the multiple layers forming the cooling water passage are defined in a plurality of separate members which are layered one on another.
Claim 7
Dependent Claim
37 words
The internal combustion engine according to claim 4 , wherein cooling water that has passed through the cooling water passage and whose temperature has thereby been increased is used as a heat source for other auxiliary equipment.
Claim 8
Dependent Claim
31 words
The internal combustion engine according to claim 4 , wherein the separate members layered one on another are fixed so as to fit into a lower face of the cylinder head.
Claim 9
Dependent Claim
123 words
An internal combustion engine comprising: a cylinder head; a combustion chamber; and a cooling water passage for cooling heat of combustion transferred from the combustion chamber to the cylinder head, the cooling water passage being provided within a cooling block fixed so as to fit into a lower face of the cylinder head and above the combustion chamber; wherein the cooling water passage is formed in multiple layers so as to cover the combustion chamber, and cooling water within the cooling water passage flows from a layer on the side far from the combustion chamber toward a layer on the side close to the combustion chamber so as to oppose the direction of emission of the heat of combustion from the combustion chamber.
Claim 10
Dependent Claim
123 words
An internal combustion engine comprising: a cylinder head; a combustion chamber; and a cooling water passage for cooling heat of combustion transferred from the combustion chamber to the cylinder head, the cooling water passage being provided within a cooling block fixed so as to fit into a lower face of the cylinder head and above the combustion chamber; wherein the cooling water passage is formed in multiple layers so as to cover the combustion chamber, and cooling water within the cooling water passage flows from a layer on the side far from the combustion chamber toward a layer on the side close to the combustion chamber so as to oppose the direction of emission of the heat of combustion from the combustion chamber.
Claim 11
Dependent Claim
37 words
The internal combustion engine according to claim 7 , wherein cooling water that has passed through the cooling water passage and whose temperature has thereby been increased is used as a heat source for other auxiliary equipment.
Claim 12
Dependent Claim
20 words
The internal combustion engine according to claim 7 , wherein the cooling block is coaxially disposed above the combustion chamber.
Claim 13
Dependent Claim
59 words
The internal combustion engine according to claim 7 , wherein the cooling block is formed by layering four members in the vertical direction, the four layers including a casing on an outermost side, an upper layer block below the casing, a middle layer block below the upper layer block, and a lower layer block below the middle layer block.
Claim 14
Dependent Claim
37 words
The internal combustion engine according to claim 10 , wherein a top wall of the combustion chamber, an intake valve opening, and the exhaust valve opening are formed on a lower face of the lower layer block.
Claim 15
Dependent Claim
44 words
The internal combustion engine according to claim 7 , further comprising a discharge passage formed in the cooling block in a position that is equidistant from each of two sparkplug guide holes, the discharge passage extending parallel to an axis of the combustion chamber.
Claim 16
Dependent Claim
138 words
An internal combustion engine comprising: a cylinder head; a combustion chamber; a cooling block forming a top wall of the combustion chamber and having an overall shape that corresponds to that of a cylinder sleeve defining of the combustion chamber; and a cooling water passage for cooling heat of combustion transferred from the combustion chamber to the cylinder head, the cooling water passage being provided within the cooling block above the combustion chamber; wherein the cooling water passage is formed in multiple layers so as to cover the combustion chamber, and cooling water within the cooling water passage flows from a layer on the side far from the combustion chamber toward a layer on the side close to the combustion chamber so as to oppose the direction of emission of the heat of combustion from the combustion chamber.
Claim 17
Dependent Claim
138 words
An internal combustion engine comprising: a cylinder head; a combustion chamber; a cooling block forming a top wall of the combustion chamber and having an overall shape that corresponds to that of a cylinder sleeve defining of the combustion chamber; and a cooling water passage for cooling heat of combustion transferred from the combustion chamber to the cylinder head, the cooling water passage being provided within the cooling block above the combustion chamber; wherein the cooling water passage is formed in multiple layers so as to cover the combustion chamber, and cooling water within the cooling water passage flows from a layer on the side far from the combustion chamber toward a layer on the side close to the combustion chamber so as to oppose the direction of emission of the heat of combustion from the combustion chamber.
Claim 18
Dependent Claim
37 words
The internal combustion engine according to claim 13 , wherein cooling water that has passed through the cooling water passage and whose temperature has thereby been increased is used as a heat source for other auxiliary equipment.
Claim 19
Dependent Claim
20 words
The internal combustion engine according to claim 13 , wherein the cooling block is coaxially disposed above the combustion chamber.
Claim 20
Dependent Claim
59 words
The internal combustion engine according to claim 13 , wherein the cooling block is formed by layering four members in the vertical direction, the four layers including a casing on an outermost side, an upper layer block below the casing, a middle layer block below the upper layer block, and a lower layer block below the middle layer block.
Claim 21
Dependent Claim
40 words
The internal combustion engine according to claim 11 , claim 16 , wherein a top wall of the combustion chamber, an intake valve opening, and the exhaust valve opening are formed on a lower face of the lower layer block.
Claim 22
Dependent Claim
44 words
The internal combustion engine according to claim 13 , further comprising a discharge passage formed in the cooling block in a position that is equidistant from each of two sparkplug guide holes, the discharge passage extending parallel to an axis of the combustion chamber.
Claim 23
Dependent Claim
153 words
An internal combustion engine comprising: a cylinder head; a combustion chamber; a cooling block having multiple layers forming a top wall of the combustion chamber and having an overall shape that is substantially the same as a surface of a wall of the combustion chamber; and a labyrinth-shaped cooling water passage for cooling heat of combustion transferred from the combustion chamber to the cylinder head, the cooling water passage being provided within the cooling block above the combustion chamber; wherein the labyrinth-shaped cooling water passage is formed in upper faces of the multiple layers of the cooling block so as to cover the combustion chamber, and cooling water within the cooling water passage flows from a layer on the side far from the combustion chamber toward a layer on the side close to the combustion chamber so as to oppose the direction of emission of the heat of combustion from the combustion chamber.
Claim 24
Dependent Claim
153 words
An internal combustion engine comprising: a cylinder head; a combustion chamber; a cooling block having multiple layers forming a top wall of the combustion chamber and having an overall shape that is substantially the same as a surface of a wall of the combustion chamber; and a labyrinth-shaped cooling water passage for cooling heat of combustion transferred from the combustion chamber to the cylinder head, the cooling water passage being provided within the cooling block above the combustion chamber; wherein the labyrinth-shaped cooling water passage is formed in upper faces of the multiple layers of the cooling block so as to cover the combustion chamber, and cooling water within the cooling water passage flows from a layer on the side far from the combustion chamber toward a layer on the side close to the combustion chamber so as to oppose the direction of emission of the heat of combustion from the combustion chamber.
Claim 25
Dependent Claim
36 words
The internal combustion engine according to claim 19 , wherein cooling water that has passed through the cooling water passage and whose temperature has thereby been increased is used as a heat source for an expander.
Claim 26
Dependent Claim
20 words
The internal combustion engine according to claim 19 , wherein the cooling block is coaxially disposed above the combustion chamber.
Claim 27
Dependent Claim
58 words
The internal combustion engine according to claim 19 wherein the cooling block is formed by layering four members in the vertical direction, the four layers including a casing on an outermost side, an upper layer block below the casing, a middle layer block below the upper layer block, and a lower layer block below the middle layer block.
Claim 28
Dependent Claim
37 words
The internal combustion engine according to claim 22 , wherein a top wall of the combustion chamber, an intake valve opening, and the exhaust valve opening are formed on a lower face of the lower layer block.
Claim 29
Dependent Claim
27 words
The internal combustion engine according to claim 19 , further comprising two sparkplug guide holes, the discharge passage extending parallel to an axis of the combustion chamber.
Claim 30
Dependent Claim
164 words
An internal combustion engine comprising: a cylinder head; a combustion chamber; and a cooling water passage for cooling heat of combustion transferred from the combustion chamber to the cylinder head, the cooling water passage being provided within the cylinder head and above the combustion chamber; wherein the cooling water passage is formed in multiple layers so as to cover the combustion chamber, and cooling water within the cooling water passage flows from a layer on the side far from the combustion chamber toward a layer on the side close to the combustion chamber so as to oppose the direction of emission of the heat of combustion from the combustion chamber; and wherein the cooling water passage has an inlet connected to said layer on the side far from the combustion chamber and an outlet connected to said layer close to the combustion chamber, said outlet being formed so as to be open at a position outwardly of said layer far from the combustion chamber.
Claim 31
Dependent Claim
164 words
An internal combustion engine comprising: a cylinder head; a combustion chamber; and a cooling water passage for cooling heat of combustion transferred from the combustion chamber to the cylinder head, the cooling water passage being provided within the cylinder head and above the combustion chamber; wherein the cooling water passage is formed in multiple layers so as to cover the combustion chamber, and cooling water within the cooling water passage flows from a layer on the side far from the combustion chamber toward a layer on the side close to the combustion chamber so as to oppose the direction of emission of the heat of combustion from the combustion chamber; and wherein the cooling water passage has an inlet connected to said layer on the side far from the combustion chamber and an outlet connected to said layer close to the combustion chamber, said outlet being formed so as to be open at a position outwardly of said layer far from the combustion chamber.
Claim 32
Dependent Claim
37 words
The internal combustion engine according to claim 25 , wherein cooling water that has passed through the cooling water passage and whose temperature has thereby been increased is used as a heat source for other auxiliary equipment.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2010-03-19 | 2010-09-18 | 2011-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2014-03-19 | 2014-09-18 | 2015-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2018-03-19 | 2018-09-18 | 2019-03-20 | $7700.00 | Window Closed / Lapsed |