US4844022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve operating apparatus for an internal combustion engine
Assignee: Honda Motor Co Ltd
•
Filing: 1987-08-27
•
Granted: 1989-07-04
•
Expires: 2007-08-27
Abstract
Abstract Valve operating apparatus for an internal combustion engine in which plural intake valves and exhaust valves are associated with each cylinder. The respective valves are operated in one engine-operating condition in response to the action of a first set of cams and in another engine-operating condition in response to the action of a second set of cams coupled to the first cam set. The cams operating the intake valves impart a different valve operating action than those operating the exhaust valves.
Inventors
- 👤 Tsuneo Konno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:30
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/26; F01L1/12; F01L1/18; F01L1/181; F01L1/267; F02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; F02F2001/244; F02F2001/245
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
181 words
Valve operating means for controlling the operation of intake and exhaust valve means in an internal combustion engine, comprising: camshaft means rotatable in synchronism with rotation of said engine; a first set of cam followers operatively connected to said intake valve means; a second set of cam followers operative connected to said exhaust valve means; means for selectively connecting the cam followers of the respective sets for either independent or united operation; a plurality of cams rotatably driven by said camshaft means including a first set of cams for operating said first set of cam followers and a second set of cams for operating said second set of cam followers under an operating mode different from that of said first cam followers; said first set of cams being effective to operate the cam followers of said first set mutually identically under each respective condition of engine operation; and said second set of cams being effective to operate the cam followers of said second set mutually differently under one condition of engine operation and mutually identically under another condition of engine operation.
Claim 2
Dependent Claim
181 words
Valve operating means for controlling the operation of intake and exhaust valve means in an internal combustion engine, comprising: camshaft means rotatable in synchronism with rotation of said engine; a first set of cam followers operatively connected to said intake valve means; a second set of cam followers operative connected to said exhaust valve means; means for selectively connecting the cam followers of the respective sets for either independent or united operation; a plurality of cams rotatably driven by said camshaft means including a first set of cams for operating said first set of cam followers and a second set of cams for operating said second set of cam followers under an operating mode different from that of said first cam followers; said first set of cams being effective to operate the cam followers of said first set mutually identically under each respective condition of engine operation; and said second set of cams being effective to operate the cam followers of said second set mutually differently under one condition of engine operation and mutually identically under another condition of engine operation.
Claim 3
Dependent Claim
89 words
The valve operating means according to claim 1 in which said first set of cams includes first cams having corresponding cam profiles for operating said cam followers in said first set identically under one condition of engine operation when said first set of cam followers operate independently of one another and another cam having a cam profile different from that of said first cams for operating said cam followers in said first set identically when said first set of cam followers are united under another condition of engine operation.
Claim 4
Dependent Claim
33 words
The valve operating means according to claim 2 in which said first set of cam followers operate independently during low speed operation of said engine and in unison during high speed operation thereof.
Claim 5
Dependent Claim
79 words
The valve operating means according to claim 2 in which said second set of cams includes cams of different cam profiles and being operative to operate said second set of cam followers mutually differently under one condition of engine operation when said second set of cam followers operate independently of one another and identically according to the profile of one or said cams under another condition of engine operation when said second set of cam followers operate in unison.
Claim 6
Dependent Claim
38 words
The valve operating means according to claim 4 in which the cam followers in each of the respective sets operate independently during low speed operation of said engine and in unison during high speed operation of said engine.
Claim 7
Dependent Claim
181 words
Valve operating means for controlling the operation of a plurality of intake valves and a plurality of exhaust valves in an internal combustion engine, comprising: camshaft means rotatable in synchronism with rotation of said engine; a first set of cam followers operatively connected to said intake valves; a second set of cam followers operatively connected to said exhaust valves; means for selectively connecting the cam followers of the respective sets for either independent or united operation; a plurality of cams rotatably driven by said camshaft means including a first set of cams for operating said first set of cam followers and a second set of cams for operating said second set of cam followers under an operating mode different from that of said first cam followers; said first set of cams being effective to operate each of said intake valves mutually identically under each respective condition of engine operation; and said second set of cams being effective to operate each of said exhaust valves mutually differently under one condition of engine operation and mutually identically under another condition of engine operation.
Claim 8
Dependent Claim
181 words
Valve operating means for controlling the operation of a plurality of intake valves and a plurality of exhaust valves in an internal combustion engine, comprising: camshaft means rotatable in synchronism with rotation of said engine; a first set of cam followers operatively connected to said intake valves; a second set of cam followers operatively connected to said exhaust valves; means for selectively connecting the cam followers of the respective sets for either independent or united operation; a plurality of cams rotatably driven by said camshaft means including a first set of cams for operating said first set of cam followers and a second set of cams for operating said second set of cam followers under an operating mode different from that of said first cam followers; said first set of cams being effective to operate each of said intake valves mutually identically under each respective condition of engine operation; and said second set of cams being effective to operate each of said exhaust valves mutually differently under one condition of engine operation and mutually identically under another condition of engine operation.
Claim 9
Dependent Claim
81 words
The valve operating means according to claim 6 in which said first set of cams includes first cams having corresponding cam profiles for operating said intake valves identically under one condition of engine operation when said first set of cam followers operate independently of one another and another cam having a cam profile different from that of said first cams for operating said intake valves identically when said first set of cam followers are united under another condition of engine operation.
Claim 10
Dependent Claim
33 words
The valve operating means according to claim 7 in which said first set of cam followers operate independently during low speed operation of said engine and in unison during high speed operation thereof.
Claim 11
Dependent Claim
76 words
The valve operating means according to claim 7 in which said second set of cams includes cams of different cam profiles and being operative to operate said exhaust valves mutually differently under one condition of engine operation when said second set of cam followers operate independently of one another and identically according to the profile of one of said cams under another condition of engine operation when said second set of cam followers operate in unison.
Claim 12
Dependent Claim
38 words
The valve operating means according to claim 9 in which the cam followers in each of the respective sets operate independently during low speed operation of said engine and in unison during high speed operation of said engine.
Claim 13
Dependent Claim
32 words
The valve operating means according to claim 9 in which one of said cams of said second set is a circular raised portion operative to maintain the associated exhaust valve substantially closed.
Claim 14
Dependent Claim
31 words
The valve operating means according to claim 11 in which said one cam of said second set maintains the associated exhaust valve substantially closed during low speed operation of said engine.
References Cited (Backward Citations)
FR1003568A
Cited
US3168083A
Cited
US3298332A
Cited
US4424790A
Cited
US4327676A
Cited
US4448156A
Cited
US4584974A
Cited
US4534323A
Cited
US4499870A
Cited
US4537165A
Cited
GB2141172A
Cited
US4545342A
Cited
US4535732A
Cited
US4537164A
Cited
US4523550A
Cited
US4576128A
Cited
US4589387A
Cited
US4612884A
Cited
US4656977A
Cited
EP0186341A1
Cited
DE3613945A1
Cited
US4690110A
Cited
EP0213758A1
Cited
JPH06119911A
Cited
JPH06181510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |