EP0356227A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Cooling system for multi-cylinder engine
Assignee: Honda Motor Co Ltd
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Filing: 1989-08-23
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Granted: —
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Expires: 2009-08-23
Abstract
Abstract In a cooling system for a multi-cylinder engine, a main gallery is provided around outer peripheral portions of the plurality of cylinder bores upstream of a block-side coolant jacket to commonly surround the cylinder bores, and an upstream coolant gallery is provided between the block-side coolant jacket and the main coolant gallery to separately surround each of the outer peripheries of the cylinder bores. The upstream coolant gallery and the main coolant gallery are in communication with each other through a constriction communication passage provided around the outer periphery of each of the cylinder bores, and the upstream coolant gallery is further in communication with an upstream end of the block-side coolant jacket. The cooling system further includes a block-side and flange-surrounding coolant gallery provided in the cylinder block to surround an outer periphery of the outward flange of a cylinder liner, and a plurality of dispensing passages permitting communication between said block-side coolant jacket and said flange-surrounding coolant gallery. Further, a jacket sidewall is disposed in the cylinder head inside at least one of opposite outside walls in an axial direction of at crank shaft to define a head-side coolant jacket. This makes it possible to uniformly and efficiently cool heated portions of the cylinder block in the multi-cylinder engine and an outward flange at an upper end of the cylinder liner inserted in the cylinder. In addition, the head-side coolant jacket is provided only in a relately narrow section required to be cooled, so that the flow speed of a coolant in the head-side coolant jacket can be increased to a relatively fast level to improve the cooling efficiency for the cylinder head.
Inventors
- 👤 Kazuo C/O Kabushiki Kaisha Inoue
- 👤 Noriyuki C/O Kabushiki Kaisha Kishi
- 👤 Hiroo C/O Kabushiki Kaisha Shimada
- 👤 Masakatsu C/O Kabushiki Kaisha Miyao
- 👤 Katsunori C/O Kabushiki Kaisha Nakamura
- 👤 Tsuneo C/O Kabushiki Kaisha Konno
- 👤 Harumi C/O Kabushiki Kaisha Taketomi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 03:11
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/02; F02F1/10; F02F1/16; F01; F01P; F01P3/00; F01P3/02; F02F1/108; F02F1/14; F02F1/24; F02F1/42; F02F1/4214; F02F7/00; F02F7/0002; F02F7/0007; F02B; F02B1/00; F02B1/02; F02B1/04; F02B75/00; F02B75/16; F02B75/18; F02B2075/1804; F02B2075/1816; F02B2275/00; F02B2275/18; F02F2001/104; F02F2001/244; F02F2001/245; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021; F05C2201/04; F05C2201/0433; F05C2201/0448; F05C2253/00; F05C2253/16; F05C2253/20
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
168 words
A cooling system for a multi-cylinder engine, comprising a block-side coolant jacket defined around outer peripehral portions of a plurality of cylinder bores to surround them, said cylinder bores being made in a cylinder block and arranged longitudinally of the cylinder block, so that a coolant is allowed to flow through said block-side coolant jacket, thereby cooling the cylinder block, said system further including an endless main gallery provided around outer peripheral portions of said plurality of cylinder bores upstream of said block-side coolant jacket to commonly surround the cylinder bores, and an upstream coolant gallery provided between said block-side coolant jacket and said main coolant gallery to separately surround each of the outer peripheries of the cylinder bores, said upstream coolant gallery and said main coolant gallery being in communcation with each other through a constriction communication passage provided around the outer periphery of each of the cylinder bores, and said upstream coolant gallery being further in communication with an upstream end of said block-side coolant jacket.
Claim 2
Dependent Claim
168 words
A cooling system for a multi-cylinder engine, comprising a block-side coolant jacket defined around outer peripehral portions of a plurality of cylinder bores to surround them, said cylinder bores being made in a cylinder block and arranged longitudinally of the cylinder block, so that a coolant is allowed to flow through said block-side coolant jacket, thereby cooling the cylinder block, said system further including an endless main gallery provided around outer peripheral portions of said plurality of cylinder bores upstream of said block-side coolant jacket to commonly surround the cylinder bores, and an upstream coolant gallery provided between said block-side coolant jacket and said main coolant gallery to separately surround each of the outer peripheries of the cylinder bores, said upstream coolant gallery and said main coolant gallery being in communcation with each other through a constriction communication passage provided around the outer periphery of each of the cylinder bores, and said upstream coolant gallery being further in communication with an upstream end of said block-side coolant jacket.
Claim 3
Dependent Claim
36 words
A cooling system for a multi-cylinder engine according to claim 1, wherein a plurality of said constriction communication passages are provided at circumferentially spaced apart distances around the outer periphery of each of the cylinder bores.
Claim 4
Dependent Claim
188 words
A cooling system for a multi-cylinder engine, comprising a block-side coolant jacket defined around outer peripehral portions of a plurality of cylinder bores to surround them, said cylinder bores being made in a cylinder block and arranged longitudinally of the cylinder block, so that a coolant is allowed to flow through said block-side coolant jacket, thereby cooling said cylinder block, said block-side coolant jacket including a plurality of coolant passages independently defined around each of the cylinder bores and extending along an axis of the cylinder bore, said system further including a main coolant gallery provided around outer peripheral portions of the plurality of cylinder bores upstream said block-side coolant jacket, and an upstream coolant gallery provided between said block-side coolant jacket and said main coolant gallery to separately surround an outer periphery of each of the cylinder bores, said upstream coolant gallery and said main coolant gallery being in communcation with each other through a constriction communication passage provided around the outer periphery of each of the cylinder bores, and said upstream coolant gallery being further in communication with an upstream end of said block-side coolant jacket.
Claim 5
Dependent Claim
188 words
A cooling system for a multi-cylinder engine, comprising a block-side coolant jacket defined around outer peripehral portions of a plurality of cylinder bores to surround them, said cylinder bores being made in a cylinder block and arranged longitudinally of the cylinder block, so that a coolant is allowed to flow through said block-side coolant jacket, thereby cooling said cylinder block, said block-side coolant jacket including a plurality of coolant passages independently defined around each of the cylinder bores and extending along an axis of the cylinder bore, said system further including a main coolant gallery provided around outer peripheral portions of the plurality of cylinder bores upstream said block-side coolant jacket, and an upstream coolant gallery provided between said block-side coolant jacket and said main coolant gallery to separately surround an outer periphery of each of the cylinder bores, said upstream coolant gallery and said main coolant gallery being in communcation with each other through a constriction communication passage provided around the outer periphery of each of the cylinder bores, and said upstream coolant gallery being further in communication with an upstream end of said block-side coolant jacket.
Claim 6
Dependent Claim
49 words
A cooling system for a multi-cylinder engine according to claim 3, further including a downstream coolant gallery provided around the outer periphery of each of the cylinder bores downstream of said block-side coolant jacket, said coolant gallery being in communication with a downstream end of said block-side coolant jacket.
Claim 7
Dependent Claim
55 words
A cooling system for a multi-cylinder engine according to claim 4, wherein said main coolant gallery, said upstream coolant gallery, said block-side coolant jacket and said downstream coolant gallery are defined in a sequentially layered relation along the axis of the cylinder bore from a lower end toward an upper end of the cylinder bore.
Claim 8
Dependent Claim
44 words
A cooling system for a multi-cylinder engine according to claim 1, 2, 3, 4 or 5, wherein said cylinder has a wet liner fitted therein, said block-side coolant jacket being directly defined between said wet liner and a cylinder wall of said cylinder block.
Claim 9
Dependent Claim
111 words
A cooling system for a multi-cylinder engine comprising a plurality of cylinders provided in a cylinder block and arranged longitudinally of the cylinder block, and cylinder liners inserted in the cylinders, respectively and each having an outward flange at its upper end, said system comprising a block-side coolant jacket provided in the cylinder block to surround an outer periphery of a body of each of said cylinder liners, a block-side and flange-surrounding coolant gallery provided in the cylinder block to surround an outer periphery of the outward flange of said cylinder liner, and a plurality of dispensing passages permitting the communication between said block-side coolant jacket and said flange-surrounding coolant gallery.
Claim 10
Dependent Claim
111 words
A cooling system for a multi-cylinder engine comprising a plurality of cylinders provided in a cylinder block and arranged longitudinally of the cylinder block, and cylinder liners inserted in the cylinders, respectively and each having an outward flange at its upper end, said system comprising a block-side coolant jacket provided in the cylinder block to surround an outer periphery of a body of each of said cylinder liners, a block-side and flange-surrounding coolant gallery provided in the cylinder block to surround an outer periphery of the outward flange of said cylinder liner, and a plurality of dispensing passages permitting the communication between said block-side coolant jacket and said flange-surrounding coolant gallery.
Claim 11
Dependent Claim
55 words
A cooling system for a multi-cylinder engine according to claim 7, wherein adjoining portions of the outward flanges of said adjacent cylinder liners are chamfered flatly and placed in contact with each other, with a rectilinear inter-flange coolant passage defined between such contacted surfaces, said coolant passage being in communication with said block-side coolant jacket.
Claim 12
Dependent Claim
53 words
A cooling system for a multi-cylinder engine according to claim 8, wherein opposite open ends of said inter-flange coolant passage are in communication with said block-side and flange-surrounding coolant gallery, so that a coolant from said block-side coolant jacket is passed through said inter-flange coolant passage to said block-side and flange-surrounding coolant gallery.
Claim 13
Dependent Claim
42 words
A cooling system for a multi-cylinder engine according to claim 9, wherein said block-side coolant jacket and said block-side and flange-surrounding coolant gallery are in direct communication with each other through longitudinal passages provided at opposite ends of said inter-flange coolant passage.
Claim 14
Dependent Claim
41 words
A cooling system for a multi-cylinder engine according to claim 9, wherein said rectilinear inter-flange coolant passage extends in a direction substantially perpendicular to an axis of a crank shaft of the engine to communicate with said block-side flange-surrounding coolant gallery.
Claim 15
Dependent Claim
47 words
A cooling system for a multi-cylinder engine according to claim 9, further including a plurality of short passages extending along the axis of the cylinder in the engine, said block-side coolant jacket and said flange-surrounding coolant gallery being in communication with each other through said short passages.
Claim 16
Dependent Claim
74 words
A cooling system for a multi-cylinder engine according to claim 7, wherein adjoining portions of the outward flanges of said adjacent cylinder liners are chamfered flatly and placed in contact with each other, with a rectilinear inter-flange coolant passage being defined between such contacted portions to extend axially of the cylinder and being opened in upper and lower surfaces of the outward flange, said coolant passage being in communication with said block-side coolant jacket.
Claim 17
Dependent Claim
50 words
A cooling system for a multi-cylinder engine according to claim 7, wherein a head-side coolant jacket is provided in said cylinder head to surround the combustion chamber defined in the cylinder head and is put into communication with said block-side and flange-surrounding coolant gallery through a plurality of communication passages.
Claim 18
Dependent Claim
40 words
A cooling system for a multi-cylinder engine according to claim 14, wherein said block-side flange-surrounding coolant gallery and said head-side flange-surrouning coolant gallery are in an overlaying and communicating relation to each other to provide a flange-surrounding combined coolant gallery.
Claim 19
Dependent Claim
47 words
A cooling system for a multi-cylinder engine according to claim 15, wherein said block-side flange-surrounding coolant gallery and said head-side flange-surrouning coolant gallery are in communication with each through a plurality of water holes made in a gasket interposed between the cylinder block and the cylinder head.
Claim 20
Dependent Claim
34 words
A cooling system for a multi-cylinder engine according to claim 16, wherein said water holes and said communication holes are in a misaligned relation to each other in a circumferential direction of the cylinder.
Claim 21
Dependent Claim
43 words
A cooling system for a multi-cylinder engine according to claim 16, wherein said block-side coolant jacket and said head-side coolant jacket are in direct communication with each other through the water holes in adjoining portions of the flanges of said adjacent cylinder liners.
Claim 22
Dependent Claim
40 words
A cooling system for a multi-cylinder engine according to claim 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 or 18, wherein said cylinder liner is a wet liner around which the block-side coolant jacket is directly defined.
Claim 23
Dependent Claim
116 words
A cooling system for a multi-cylinder engine comprising an engine block in which coupled to a cylinder block having a block-side coolant jacket surrounding cylinder bores each having piston received therein is a cylinder head having a head-side coolant jacket which is defined to surround combustion chambers defined above said pistons and which leads to said block-side coolant jacket, with opposite outside walls of said cylinder head in an axial direction of a crank shaft being substantially aligned with opposite outside walls of said cylinder block, said cylinder head having a jacket sidewall disposed inside at least one of opposite outside walls in an axial direction of the crank shaft for defining the head-side coolant jacket.
Claim 24
Dependent Claim
116 words
A cooling system for a multi-cylinder engine comprising an engine block in which coupled to a cylinder block having a block-side coolant jacket surrounding cylinder bores each having piston received therein is a cylinder head having a head-side coolant jacket which is defined to surround combustion chambers defined above said pistons and which leads to said block-side coolant jacket, with opposite outside walls of said cylinder head in an axial direction of a crank shaft being substantially aligned with opposite outside walls of said cylinder block, said cylinder head having a jacket sidewall disposed inside at least one of opposite outside walls in an axial direction of the crank shaft for defining the head-side coolant jacket.
Claim 25
Dependent Claim
81 words
A cooling system for a multi-cylinder engine according to claim 20, further including an exhaust port provided in one of the opposite outside walls of said cylinder head in the axial direction of the crank shaft and an intake port provided in the other outside wall, said jacket sidewall being disposed inside said outside wall having said intake port provided therein, said head-side coolant jacket being defined between said jacket sidewall and said outside wall having said exhaust port provided therein.
Claim 26
Dependent Claim
63 words
A cooling system for a multi-cylinder engine according to claim 20, wherein said cylinder block includes an outside wall at a location spaced outwardly apart from the wall defining the block-side coolant jacket, said opposite outside walls of the cylinder head in the axial direction of the crank shaft being disposed in an aligned relation to said outside wall of the cylinder block.
Claim 27
Dependent Claim
79 words
A cooling system for a multi-cylinder engine according to claim 21, wherein said cylinder block includes a plurality of cylinder bores provided side-by-side therein, and said head-side coolant jacket comprises a plurality of passages divided from one another to independently cool the plurality of combustion chambers, and a gallery portion provided in the outside wall having the exhaust port provided therein to extend in a direction of arrangement of the combustion chambers and to commonly communicate with the passages.
References Cited (Backward Citations)
No citation records indexed.
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