Patent US5010857A successfully refreshed from Google Patents.
Patent EP0262269A1 successfully refreshed from Google Patents.
EP0262269A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Valve operating mechanism for internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1986-10-01
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Granted: —
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Expires: 2006-10-01
Abstract
Abstract A valve operating mechanism for operating at least one valve of an internal combustion engine, includes a camshaft (2) rotatable in synchronism with rotation of the internal combustion engine and having a pair of low- and high-speed cams (3,5) of different cam profiles, a rocker shaft (6), and a pair of first and second rocker arms (7,8) rotatably mounted on the rocker shaft and operable selectively by the low- and high-speed cams for operating the valve according to the cam profiles of the cams. A selective coupling(21) is operatively disposed in and between the first and second rocker arms for interconnecting the first and second rocker arms in high-speed operation of the engine and for disconnecting the first and second rocker arms from each other in low-speed operation of the engine.
Inventors
- 👤 Nagahiro Kenichi
- 👤 Katoh Masaaki
- 👤 Ajiki Yoshio
- 👤 Inoue Kazuo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 06:55
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/26; F01L1/267; F02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; F02F2001/244; F02F2001/247
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
111 words
A valve operating mechanism for operating at least one valve of an internal combustion engine, comprising: a camshaft rotatable in synchronism with rotation of the internal combustion engine and having a pair of low-and high-speed cams of different cam profiles: a pair of first and second rocker arms operable selectively by said low- and high-speed cams for operating the valve(s) according to the cam profiles of said cams; and means operatively disposed between said first and second rocker arms for interconnecting said first and second rocker arms in high-speed operation of the engine and for disconnecting said first and second rocker arms from each other in low-speed operation of the engine.
Claim 2
Dependent Claim
111 words
A valve operating mechanism for operating at least one valve of an internal combustion engine, comprising: a camshaft rotatable in synchronism with rotation of the internal combustion engine and having a pair of low-and high-speed cams of different cam profiles: a pair of first and second rocker arms operable selectively by said low- and high-speed cams for operating the valve(s) according to the cam profiles of said cams; and means operatively disposed between said first and second rocker arms for interconnecting said first and second rocker arms in high-speed operation of the engine and for disconnecting said first and second rocker arms from each other in low-speed operation of the engine.
Claim 3
Dependent Claim
34 words
A valve operating mechanism according to claim 1, wherein said first and second rocker arms are held in sliding contact with said low- and high-speed cams, respectively, for operating a pair of valves, respectively.
Claim 4
Dependent Claim
43 words
A valve operating mechanism according to claim 1, wherein said first and second rocker arms are held in sliding contact with said low- and high-speed cams, respectively, said first rocker arm having a pair of arms for operating a pair of valves, respectively.
Claim 5
Dependent Claim
39 words
A valve operating mechanism according to claim 1, wherein said first and second rocker arms are held in sliding contact with said low- and high-speed cams, respectively, said first rocker arm having an arm for operating a single valve.
Claim 6
Dependent Claim
28 words
A valve operating mechanism according to claim 3 or 4, including lifter means for normally urging said second rocker arm resiliently into sliding contact with said high-speed cam.
Claim 7
Dependent Claim
101 words
A valve operating mechanism according to any preceding claim, wherein said means comprises a selective coupling composed of a first guide hole defined in said first rocker arm, a second guide hole defined in said second rocker arm in registration with said first guide hole, a piston slidably fitted in said first guide hole, a spring disposed in said second guide hole for normally urging said piston into said first guide hole, and means for applying hydraulic pressure to said piston to move the same to a position between said first and second guide holes against the resiliency of said spring.
References Cited (Backward Citations)
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