EP0276532A1
Expired / Lapsed
EP
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Valve operating mechanism for internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1987-01-30
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Granted: —
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Expires: 2007-01-30
Abstract
Abstract A valve operating mechanism for operating a single valve (1) of a particular cylinder of an internal combustion engine includes a camshaft (2) rotatable in synchronism with rotation of the internal combustion engine and having at least one cam, (4,5), and a plurality of cam followers (7-9), one of which slidably engages the cam for selectively operating the valve according to a cam profile of the cam. The cam followers are selectively interconnected and disconnected to operate the valve differently in different speed ranges of the internal combustion engine. In different embodiments, the camshaft has an annular raised portion (3) and low- (4) and high-speed (5) cams, or low-, medium-, and high-speed cams, or an annular raised portion and a cam, and the cam followers are held in sliding contact with these raised portion and cams. The valve is selectively kept inoperative by the raised portion and operated in low- and high-speed ranges by the low- and high-speed cams, or selectively operated in low-, medium-, and high-speed ranges by the low-, medium-, and high-speed cams, or selectively kept inoperative by the raised portion and operated in a high-speed range by the cam.
Inventors
- 👤 Kazuo Kabushiki Kaisha Honda Inoue
- 👤 Kenichi Kabushiki Kaisha Honda Nagahiro
- 👤 Yoshio Kabushiki Kaisha Honda Ajiki
- 👤 Masaaki Kabushiki Kaisha Honda Katoh
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 21:59
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/26; F01L1/267; F02; F02D; F02D13/00; F02D13/02; F02D13/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
86 words
A valve operating mechanism for operating a single valve of a particular cylinder of an internal combustion engine, comprising: a camshaft rotatable in synchronism with rotation of the internal combustion engine and having at least one cam; a plurality of cam followers, one of which slidably engages said cam for selectively operating the valve according to a cam profile of said cam; and means for selectively interconnecting and disconnecting said cam followers to operate the valve differently in different speed ranges of the internal combustion engine.
Claim 2
Dependent Claim
86 words
A valve operating mechanism for operating a single valve of a particular cylinder of an internal combustion engine, comprising: a camshaft rotatable in synchronism with rotation of the internal combustion engine and having at least one cam; a plurality of cam followers, one of which slidably engages said cam for selectively operating the valve according to a cam profile of said cam; and means for selectively interconnecting and disconnecting said cam followers to operate the valve differently in different speed ranges of the internal combustion engine.
Claim 3
Dependent Claim
102 words
A valve operating mechanism according to claim 1, wherein said camshaft has an annular raised portion, a low-speed cam, and a high-speed cam, said raised portion being positioned between said low- and high-speed cams, said cam followers including cam followers which slidably engage said low- and high-speed cams, respectively, and a cam follower which slidably engages said raised portion for controlling said valve, said means including means for selectively keeping said valve inoperative in a speed range with said raised portion, and operating said valve in a low-speed range with said low-speed cam and in a high-speed range with said high-speed cam.
Claim 4
Dependent Claim
104 words
A valve operating mechanism according to claim 1, wherein said camshaft has an annular raised portion, a low-speed cam, and a high-speed cam, said low-speed cam being positioned between said raised portion and said high-speed cam, said cam followers including cam followers which slidably engage said low- and high-speed cams, respectively, and a cam follower which slidably engages said raised portion for controlling said valve, said means including means for selectively keeping said valve inoperative in a speed range with said raised portion, and operating said valve in a low-speed range with said low-speed cam and in a high-speed range with said high-speed cam.
Claim 5
Dependent Claim
96 words
A valve operating mechanism according to claim 1, wherein said camshaft has a low-speed cam, a medium-speed cam, and a high-speed cam, said low-speed cam being positioned between said medium- and high-speed cams, said cam followers including cam followers which slidably engage said low- and high-speed cams, respectively, and a cam follower which slidably engages said low-speed cam for controlling said valve, said means including means for operating said valve selectively in a low-speed range with said low-speed cam, in a medium-speed range with said medium-speed cam, and in a high-speed range with said high-speed cam.
Claim 6
Dependent Claim
96 words
A valve operating mechanism according to claim 1, wherein said camshaft has a low-speed cam, a medium-speed cam, and a high-speed cam, said medium-speed cam being positioned between said low- and high-speed cams, said cam followers including cam followers which slidably engage said medium- and high-speed cams, respectively, and a cam follower which slidably engages said low-speed cam for controlling said valve, said means including means for operating said valve selectively in a low-speed range with said low-seed cam, in a medium-speed range with said medium-speed cam, and in a high-speed range with said high-speed cam.
Claim 7
Dependent Claim
67 words
A valve operating mechanism according to claim 1, wherein said camshaft has an annular raised portion positioned adjacent to said cam, said cam followers including a cam follower which slidably engages said raised portion for controlling said valve, said means including means for selectively keeping said valve inoperative in a speed range with said raised portion and operating said valve in a high-speed range with said cam.
References Cited (Backward Citations)
DE3119133A1
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FR2510182A1
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DE3326768A1
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GB2162246A
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DE3613945A1
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EP0213758A1
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