US4782797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction system
Assignee: Yamaha Motor Co Ltd
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Filing: 1986-09-08
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Granted: 1988-11-08
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Expires: 2006-09-08
Abstract
Abstract An induction system for a multiple cylinder internal combustion engine that employs a pair of plenum chambers with a common air inlet. An exhaust gas recirculation system is provided for distributing exhaust gases equally to the chambers of the engine by re-introducing the exhaust gases to the common air inlet through an integrally formed conduit.
Inventors
- 👤 Toshio Kurahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:33
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02B27/00; F02B27/005; F02B27/006; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; F02M; F02M26/00; F02M26/13; F02M26/17; F02M26/42; F02M35/00; F02M35/10; F02M35/10006; F02M35/10026; F02M35/10045; F02M35/104; F02M35/108; F02M35/1085; F02M35/116; F02B2075/1804; F02B2075/1824; F02F2200/00; F02F2200/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
125 words
An induction system for an internal combustion engine comprising a first plenum chamber, a first series of runners extending from said first plenum chamber to a first series of combustion chamber intakes, a second plenum chamber, a second series of runners communicating said second plenum chamber with a second series of combustion chamber intakes, an air inlet device, means for communicating said air inlet device with each of said plenum chambers for introducing an air change to the engine combustion chambers, an exhaust system for receiving engine exhaust gases, and means for recirculating a portion of said engine exhaust gases back to said combustion chambers including an E.G.R. outlet communicating with said air inlet device including a passageway formed integrally with said air inlet device.
Claim 2
Dependent Claim
125 words
An induction system for an internal combustion engine comprising a first plenum chamber, a first series of runners extending from said first plenum chamber to a first series of combustion chamber intakes, a second plenum chamber, a second series of runners communicating said second plenum chamber with a second series of combustion chamber intakes, an air inlet device, means for communicating said air inlet device with each of said plenum chambers for introducing an air change to the engine combustion chambers, an exhaust system for receiving engine exhaust gases, and means for recirculating a portion of said engine exhaust gases back to said combustion chambers including an E.G.R. outlet communicating with said air inlet device including a passageway formed integrally with said air inlet device.
Claim 3
Dependent Claim
27 words
In an induction system for an internal combustion engine as claimed in claim 1, wherein the passageway is drilled into a casting forming the air inlet device.
Claim 4
Dependent Claim
40 words
In an induction system for an internal combustion engine as claimed in claim 2, wherein the passageway is formed by a plurality of intersecting drilled holes, the outer ends of at least some of said holes being closed by plugs.
Claim 5
Dependent Claim
25 words
In an induction system for an internal combustion engine as claimed in claim 3, further including an E.G.R. control valve carried by said inlet device.
Claim 6
Dependent Claim
49 words
In an induction system for an internal combustion engine as claimed in claim 4, further including a throttle valve positioned in said air inlet device for controlling the flow of air to the engine and the E.G.R. outlet communicates with the air inlet device downstream of said throttle valve.
Claim 7
Dependent Claim
55 words
In an induction system for an internal combustion engine as claimed in claim 4, wherein the plenum chambers are disposed in parallel relationship to each other, and the air inlet device has a Y-shape with a single inlet portion and a pair of outlet portions each communicating with a respective one of the plenum chambers.
Claim 8
Dependent Claim
43 words
In an induction system for an internal combustion engine as claimed in claim 6, further including a single throttle valve in the common air inlet portion of the air inlet device for controlling the flow of air to both of the plenum chambers.
Claim 9
Dependent Claim
45 words
In an induction system for an internal combustion engine as claimed in claim 4, wherein the first series of runners and the second series of runners are arranged in pairs with a runner of each series communicating with the same combustion chamber of the engine.
Claim 10
Dependent Claim
49 words
In an induction system for an internal combustion engine as claimed in claim 8, further including a throttle valve positioned in said air inlet device for controlling the flow of air to the engine and the E.G.R. outlet communicates with the air inlet device downstream of said throttle valve.
Claim 11
Dependent Claim
36 words
In an induction system for an internal combustion engine as claimed in claim 4, wherein the engine is of the V-type, and each of the plenum chambers is associated with a respective bank of the engine.
Claim 12
Dependent Claim
45 words
In an induction system for an internal combustion engine as claimed in claim 10, wherein the first series of runners and the second series of runners are arranged in pairs with a runner of each series communicating with the same combustion chamber of the engine.
Claim 13
Dependent Claim
43 words
In an induction system for an internal combustion engine as claimed in claim 11, further including a single throttle valve in the common air inlet portion of the air inlet device for controlling the flow of air to both of the plenum chambers.
Claim 14
Dependent Claim
61 words
In an induction system for an internal combustion engine as claimed in claim 10, wherein each of the plenum chambers is disposed above a respective one of the cylinder banks and the inlet device is positioned at the forward end of the engine, the EGR control valve being carried by said inlet device in proximity to one of the cylinder banks.
Claim 15
Dependent Claim
36 words
In an induction system for an internal combustion engine as claimed in claim 1, wherein the engine is of the V-type, and each of the plenum chambers is associated with a respective bank of the engine.
Claim 16
Dependent Claim
34 words
In an induction system for an internal engine as claimed in claim 14, further including an EGR control valve carried by said inlet device and positioned in proximity to one of the cylinder banks.
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) | 1991-11-08 | 1992-05-09 | 1992-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-08 | 1996-05-09 | 1996-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-08 | 2000-05-09 | 2000-11-08 | $7700.00 | Window Closed / Lapsed |