US4766866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intake system for engine
Assignee: Yamaha Motor Co Ltd
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Filing: 1987-03-30
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Granted: 1988-08-30
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Expires: 2007-03-30
Abstract
Abstract A compound induction system for an internal combustion engine embodying at least two intake passages serving each combustion chamber. A throttle valve arrangement is incorporated for controlling the flow through one of the intake passages and this throttle valve is opened in a staged sequence so that that induction passage will not act as a side branch resonant chamber under any experienced running conditions.
Inventors
- 👤 Osamu Takii
- 👤 Hironobu Ukei
- 👤 Keiji Fujikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:53
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/10; F02M35/104; F02M35/116; F02B; F02B27/00; F02B27/02; F02B27/0205; F02B27/0226; F02B27/0268; F02B27/0273; F02B31/00; F02B31/08; F02B31/087; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; F02F1/4221; F02M35/108; F02M35/1085; F02B1/00; F02B1/02; F02B1/04; F02B2275/00; F02B2275/18; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02F2001/244; F02F2001/245; F02M35/1015; F02M35/10196; F02M35/10209; F02M35/10216; F02M35/10373; F02M35/10386; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
118 words
In an induction system for an internal combustion engine having a variable volume chamber, first and second intake passages serving said variable volume chamber, throttle valve means for controlling the communication of said second intake passage with said chamber, said throttle valve means being disposed upstream of the point where said second intake passage communicates with said chamber for defining a volume communicating with said chamber, and means for opening said throttle valve means in response to a running condition of the engine under which said volume would act as a side branch resonator if said volume were closed for precluding said volume from acting as a side branch resonator during at least some phases of engine running.
Claim 2
Dependent Claim
118 words
In an induction system for an internal combustion engine having a variable volume chamber, first and second intake passages serving said variable volume chamber, throttle valve means for controlling the communication of said second intake passage with said chamber, said throttle valve means being disposed upstream of the point where said second intake passage communicates with said chamber for defining a volume communicating with said chamber, and means for opening said throttle valve means in response to a running condition of the engine under which said volume would act as a side branch resonator if said volume were closed for precluding said volume from acting as a side branch resonator during at least some phases of engine running.
Claim 3
Dependent Claim
42 words
In an induction system as set forth in claim 1 wherein the staged opening of the throttle valve means comprises opening from a closed position to a part throttle position and opening from the part throttle position to a fully opened position.
Claim 4
Dependent Claim
54 words
In an induction system as set forth in claim 2 wherein there is a three stage opening of the throttle valve means from a closed position to a partially opened position, from that partially opened position to a more fully opened position and from the more fully opened position to a wide open position.
Claim 5
Dependent Claim
27 words
In an induction system as set forth in claim 1 wherein the induction passages open into the chambers regardless of the opening of the throttle valve means.
Claim 6
Dependent Claim
23 words
In an induction system as set forth in claim 4 wherein the intake passages open into the variable volume chambers through intake ports.
Claim 7
Dependent Claim
42 words
In an induction system as set forth in claim 5 wherein the staged opening of the throttle valve means comprises opening from a closed position to a part throttle position and opening from the part throttle position to a fully opened position.
Claim 8
Dependent Claim
54 words
In an induction system as set forth in claim 6 wherein there is a three stage opening of the throttle valve means from a closed position to a partially opened position, from that partially opened position to a more fully opened position and from the more fully opened position to a wide open position.
Claim 9
Dependent Claim
20 words
In an induction system as set forth in claim 5 further including intake valves controlling the flow through the ports.
Claim 10
Dependent Claim
42 words
In an induction system as set forth in claim 8 wherein the staged opening of the throttle valve means comprises opening from a closed position to a part throttle position and opening from the part throttle position to a fully opened position.
Claim 11
Dependent Claim
54 words
In an induction system as set forth in claim 9 wherein there is a three stage opening of the throttle valve means from a closed position to a partially opened position, from that partially opened position to a more fully opened position and from the more fully opened position to a wide open position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |