US3882831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intake control for internal combustion engines
Assignee: Honda Motor Co Ltd
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Filing: 1974-03-15
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Granted: 1975-05-13
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Expires: 1994-03-15
Abstract
Abstract An intake control device for internal combustion engines of the type including a main combustion chamber and an auxiliary combustion chamber, the latter having a spark plug, the chambers being jointed by a torch passage, the chambers being connected respectively to a main intake passage and an auxiliary intake passage having corresponding intake valves; the intake control device including a main carburetor having a main primary passageway and a main secondary passageway communicating with the main combustion chamber through the main intake manifold passage, and an auxiliary carburetor having an auxiliary passageway communicating with the auxiliary combustion chamber through the auxiliary intake manifold passage; the intake control device further including a main primary, a main secondary and an auxiliary throttle valves mounted respectively in the primary, secondary and auxiliary passageways, and cams and levers interconnecting each throttle valve and partially actuated by a vacuum pressure operated assembly to maintain optimum quantity of air-fuel mixtures in the main and auxiliary combustion chambers throughout light and heavy engine load conditions.
Inventors
- 👤 Tasuku Date
- 👤 Shizuo Yagi
- 👤 Kiyoshi Miyaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:03
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/10; F02B19/1019; F02B19/1023; F02B19/1028; F02B19/1052; F02M; F02M13/00; F02M13/02; F02M13/04; F02M13/046; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
188 words
An intake control device for internal combustion engines of the type including a main combustion chamber and an auxiliary combustion chamber, the latter having a spark plug, the chambers being joined by a torch passage and being connected respectively to an inlet valve controlled main intake passage and auxiliary intake passage, said intake control device comprising: a main carburetor including a main primary passageway having a first throttle valve and a main secondary passageway having a second throttle valve, said primary and secondary passageways adapted to produce a lean air-fuel mixture and connected in common to said main intake passage, an auxiliary carburetor including an auxiliary passageway having a third throttle valve, said auxiliary passageway adapted to produce a rich air-fuel mixture and connected to said auxiliary intake passage; and interconnecting means operable under light engine load conditions to coordinatively open the first and third throttle valves, and operable to open said second throttle valve under a range of heavy engine load conditions continuing from the range of light engine load conditions, whereby the third throttle valve opens coordinatively with the turning movement of the second throttle valve.
Claim 2
Dependent Claim
188 words
An intake control device for internal combustion engines of the type including a main combustion chamber and an auxiliary combustion chamber, the latter having a spark plug, the chambers being joined by a torch passage and being connected respectively to an inlet valve controlled main intake passage and auxiliary intake passage, said intake control device comprising: a main carburetor including a main primary passageway having a first throttle valve and a main secondary passageway having a second throttle valve, said primary and secondary passageways adapted to produce a lean air-fuel mixture and connected in common to said main intake passage, an auxiliary carburetor including an auxiliary passageway having a third throttle valve, said auxiliary passageway adapted to produce a rich air-fuel mixture and connected to said auxiliary intake passage; and interconnecting means operable under light engine load conditions to coordinatively open the first and third throttle valves, and operable to open said second throttle valve under a range of heavy engine load conditions continuing from the range of light engine load conditions, whereby the third throttle valve opens coordinatively with the turning movement of the second throttle valve.
Claim 3
Dependent Claim
119 words
An intake control device as defined in claim 1, wherein the interconnecting means further comprises: said main primary and secondary passageways having a main primary and a main secondary venturi throats, respectively; means for actuating the first throttle valve; cam and lever means operatively connecting the first and third throttle valves to effect proportional flow of air-fuel mixtures to said main and auxiliary intake passages; further cam and lever means operatively connecting the first and third throttle valves with the second throttle valve when the position of the first throttle valve exceeds a preselected setting; and means responsive to vacuum pressures in at least one of the main venturi throats for controlling the position of the second throttle valve.
Claim 4
Dependent Claim
91 words
An intake control device as defined in claim 1, wherein the interconnecting means further comprises: an accelerator pedal operated means for controlling the position of the first throttle valve; first and second cams rotatable with the first throttle valve; a third cam and lever engaging the second cam for operating the third throttle valve; a lever for operating the second throttle valve; a linking lever interconnecting the first cam, third cam and second throttle valve operating lever; and a vacuum responsive means also connected to the second throttle valve operating lever.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |