Patent EP0657833A2 successfully refreshed from Google Patents.
Patent EP0212981A2 successfully refreshed from Google Patents.
EP0212981A2
Expired / Lapsed
EP
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Oil supply system for a valve operating mechanism in internal combustion engines
Assignee: Honda Motor Co Ltd
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Filing: 1986-08-21
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Granted: —
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Expires: 2006-08-21
Abstract
Abstract Oil is supplied from an oil pump (30) as working oil to hydraulic lash adjusters (17a, 17b) and also as lubricating oil to journals and cams of a camshaft (12). The oil passage system includes a first supply passage (31a) connected to the oil pump, a second supply passage (31 b) connected between the first supply passage and a first distribution passage (32a) coupled to a group of hydraulic lash adjusters (1 7b), a joint passage (33) connected to the first distribution passage, and a second distribution passage (32b) coupled to the joint passage and connected to another group of hydraulic lash adjusters (17a). The second distribution passage is connected by air vent passages (35b, 35c) to a lubricating oil passage (34) which supplies the camshaft with the lubricating oil. The joint passage is connected to one of the camshaft journals by a relief passage (36) having a relief valve (37).
Inventors
- 👤 Toshinari Sonoda
- 👤 Toshiaki Hiro
- 👤 Toshihiko Matsubara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 09:03
CPC Classifications
F; F01; F01M; F01M11/00; F01M11/02; F01L; F01L1/00; F01L1/02; F01L1/04; F01L1/047; F01L1/053; F01L1/20; F01L1/22; F01L1/24; F01L1/2405; F01M9/00; F01M9/10; F01M9/101; F01M9/102; F01M9/104; F02; F02B; F02B2275/00; F02B2275/20; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02F; F02F2200/00; F02F2200/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
95 words
A system for supplying oil to a camshaft (12) and hydraulic lash adjusters (17a, 17b) of a valve operating mechanism (9) in an internal combustion engine (E), said system comprising: a supply passage (31a, 31b) for supplying oil under pressure; a distribution passage (32a, 32b, 33) connected to said supply passage for distributing oil from said supply passage as working oil to the hydraulic lash adjusters; and a lubricating oil passage (34) connected to said distribution passage for supplying oil from said distribution passage as lubricating oil to lubricate journals and cams of said camshaft.
Claim 2
Independent Claim
95 words
A system for supplying oil to a camshaft (12) and hydraulic lash adjusters (17a, 17b) of a valve operating mechanism (9) in an internal combustion engine (E), said system comprising: a supply passage (31a, 31b) for supplying oil under pressure; a distribution passage (32a, 32b, 33) connected to said supply passage for distributing oil from said supply passage as working oil to the hydraulic lash adjusters; and a lubricating oil passage (34) connected to said distribution passage for supplying oil from said distribution passage as lubricating oil to lubricate journals and cams of said camshaft.
Claim 3
Independent Claim
43 words
A system according to claim-1, further including a relief passage (36) communicating between said distribution passage (33) and one of said journals and having a relief valve (37) openable when the pressure of oil in said distribution passage rises beyond a predetermined level.
Claim 4
Dependent Claim
32 words
A system according to claim 2, wherein said relief passage (36) is defined in a cylinder head (2) of said engine, said relief valve (37) being detachably mounted in said cylinder head.
Claim 5
Independent Claim
37 words
A system according to any of claims 1 to 3, further including an oil check passage system (38) connected to said distribution passage for preventing oil from flowing from said distribution passage back to said supply passage.
Claim 6
Dependent Claim
50 words
A system according to claim 4, wherein said lubricating oil passage (34) has a plurality of oil outlet holes (29) opening toward said cams (12i, 12e) of said camshaft, and further including an air vent passage (35h) interconnected between said oil check passage system (38) and said lubricating oil passage.
Claim 7
Independent Claim
53 words
A system according to any of claims 1 to 3, wherein said lubricating oil passage (34) has a plurality of oil outlet holes (29) opening toward said cams (12i, 12e) of said camshaft, further including at least one air vent passage (35b, 35c) interconnected between said distribution passage and said lubricating oil passage.
Claim 8
Dependent Claim
19 words
A system according to claim 5 or 6, wherein the or each said air vent passage has an orifice.
Claim 9
Independent Claim
64 words
A system according to any preceding claim, wherein said distribution passage includes a pair of substantially parallel first (32a) and second (32b) distribution passages connected to respective groups of said hydraulic lash adjusters, said first distribution passage being connected to said supply passage (31b), and further including a joint passage (33) interconnected between said first and second distribution passages remotely from said supply passage.
Claim 10
Dependent Claim
25 words
A system according to claim 8, when dependent on claim 2, wherein said relief passage communicates between said joint passage and one of said journals.
Claim 11
Independent Claim
81 words
A system according to any of claims 1 to 3, wherein said lubricating oil passage (34) has a plurality of oil outlet holes (29) opening toward said cams (12i, 12e) of said camshaft, and further including first, second, and third air vent passages, said first air vent passage (35a) communicating between said supply passaae (31b) and one of said journals, and said second (35b) and third (35c) air vent passages beinq interconnected between said distribution passage and said lubricating oil passage.
Claim 12
Dependent Claim
23 words
A system according to claim 10, wherein each of said first, second, and third air vent passages has an orifice (J3, J4, J5).
Claim 13
Independent Claim
59 words
A system according to any preceding claim, further including an oil pump (30), said supply passage comprising first (31a) and second (31b) supply passages, said first supply passage being connected to said oil pump, said second supply passage being interconnected between said first supply passage and said distribution passage and extending obliquely downwardly away from said first supply passage.
Claim 14
Dependent Claim
28 words
A system according to claim 12, further including an air vent passage (35a) communicating between said second supply passage (31b) and one of said journals of said camshaft.
References Cited (Backward Citations)
No citation records indexed.
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