EP0276533A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
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 plurality of valves (la,lb) 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 (5). At least one of a plurality of cam followers (7,8) slidably engages the cam for selectively operating the valves according to a cam profile of the cam. The cam followers are selectively interconnected and disconnected to operate the valves in different speed ranges of the internal combustion engine, the speed ranges including a range in which all of the valves remain inoperative. The camshaft has one or two annular raised portions (3) in addition to the cam, and the cam followers include one or two cam followers which slidably engage the raised portion or portions. The valves remain inoperative by the annular portion or portions and are operated in a high-speed range by the cam, or selectively in low- and high-speed ranges by low- and high-speed cams.
Inventors
- 👤 Kazuo Inoue
- 👤 Kenichi Nagahiro
- 👤 Yoshio Ajiki
- 👤 Masaaki Katoh
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 12:08
CPC Classifications
F; F02; F02D; F02D13/00; F02D13/02; F02D13/06; F01; F01L; F01L1/00; F01L1/26; F01L1/267; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
A valve operating mechanism for operating a plurality of valves 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 valves according to a cam profile of said cam; and means for selectively interconnecting and disconnecting said cam followers to operate the valves differently in different speed ranges of the internal combustion engine, said speed ranges including a range in which all of the valves remain inoperative.
Claim 2
Dependent Claim
101 words
A valve operating mechanism for operating a plurality of valves 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 valves according to a cam profile of said cam; and means for selectively interconnecting and disconnecting said cam followers to operate the valves differently in different speed ranges of the internal combustion engine, said speed ranges including a range in which all of the valves remain inoperative.
Claim 3
Dependent Claim
70 words
A valve operating mechanism according to claim l, wherein said camshaft has two annular raised positions with one positioned on each side of said cam, said cam followers including cam followers which slidably engage said raised portions, respectively, for controlling said valves, said means including means for selectively keeping said valves inoperative in said range with said raised portions and operating said valves in a high-speed range with said cam.
Claim 4
Dependent Claim
66 words
A valve operating mechanism according to claim l, 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 valves, said means including means for selectively keeping said valves inoperative in said range with said raised portion and operating said valves in a high-speed range with said cam.
Claim 5
Dependent Claim
69 words
A valve operating mechanism according to claim l, wherein said camshaft has two adjacent annular raised portions positioned on one side of said cam, said cam followers including cam followers which slidably engage said raised portions, respectively, for controlling said valves, said means including means for selectively keeping said valves inoperative in said range with said raised portions and operating said valves in a high-speed range with said cam.
Claim 6
Dependent Claim
100 words
A valve operating mechanism according to claim l, 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 valves, said means including means for selectively keeping said valves inoperative in said range with said raised portion and operating said valves in a low-speed range with said low-speed cam and in a high-speed range with said cam.
Claim 7
Dependent Claim
102 words
A valve operating mechanism according to claim l, 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 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 valves, said means including means for selectively keeping said valves inoperative in said range with said raised portion and operating said valves in a low-speed range with said low-speed cam and in a high-speed range with said cam.
References Cited (Backward Citations)
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