Patent EP0307060A2 successfully refreshed from Google Patents.
Patent CA658288A successfully refreshed from Google Patents.
Patent US4050430A successfully refreshed from Google Patents.
US4050430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intake air warming device
Assignee: Nissan Motor Co Ltd
•
Filing: 1976-08-06
•
Granted: 1977-09-27
•
Expires: 1996-08-06
Abstract
Abstract A first air-warming chamber partially surrounds a second air-warming chamber, which is disposed about an exhaust pipe. Air is passed through the first then second chambers in a zigzag flow path. The prewarmed air entering the second chamber is further heated to a desired level.
Inventors
- 👤 Susumu Amagai
- 👤 Shigeru Oikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:50
CPC Classifications
F; F02; F02M; F02M31/00; F02M31/02; F02M31/04; F02M31/06; F02M31/08; F02M31/087; F02M31/093; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
183 words
An internal combination engine including an intake air warming device for warming intake air to be supplied to an intake system of comprising: an exhaust gas conduit communicated with exhaust ports of the engine and through which hot exhaust gas is emitted to the atmosphere; an elongated hollow housing surrounding said exhaust gas conduit to define therebetween an enclosed space; at least one partition member disposed within said housing and spaced apart from the inside wall of said housing for radially separating said enclosed space surrounding said exhaust conduit into at least first and second air-warming chambers, said first air-warming chamber defined radially outside of said partition member and said second air-warming chamber defined radially inside of said partition member; an air inlet opening into said first air-warming chamber and allowing air to flow therein; an opening provided in said partition member and allowing the air having entering said first air-warming chamber to flow therefrom into said second air-warming chamber; and an air outlet opening into said second air-warming chamber and allowing the warmed air to be conveyed therefrom to the intake system.
Claim 2
Dependent Claim
183 words
An internal combination engine including an intake air warming device for warming intake air to be supplied to an intake system of comprising: an exhaust gas conduit communicated with exhaust ports of the engine and through which hot exhaust gas is emitted to the atmosphere; an elongated hollow housing surrounding said exhaust gas conduit to define therebetween an enclosed space; at least one partition member disposed within said housing and spaced apart from the inside wall of said housing for radially separating said enclosed space surrounding said exhaust conduit into at least first and second air-warming chambers, said first air-warming chamber defined radially outside of said partition member and said second air-warming chamber defined radially inside of said partition member; an air inlet opening into said first air-warming chamber and allowing air to flow therein; an opening provided in said partition member and allowing the air having entering said first air-warming chamber to flow therefrom into said second air-warming chamber; and an air outlet opening into said second air-warming chamber and allowing the warmed air to be conveyed therefrom to the intake system.
Claim 3
Dependent Claim
48 words
An intake air warming device as set forth in claim 1, in which said air inlet, said opening and said air outlet are alternately arranged between one and the other longitudinal sides of the intake air warming device to provide a zigzag air flow path with said device.
Claim 4
Dependent Claim
38 words
An intake air warming device as set forth in claim 2, in which both air inlet and said air outlet are located at said one longitudinal side and said opening is located at said the other longiitudinal side.
Claim 5
Dependent Claim
38 words
An intake air warming device as set forth in claim 3, in which said one longitudinal side is upstream of said the other longitudinal side with respect to the flow of exhaust gas in said exhaust gas conduit.
Claim 6
Dependent Claim
89 words
An exhaust air warming device as set forth in claim 1, in which said housing is comprised of two half sections each of which has a body portion of semicircular cross section, a tapering portion toward each longitudinal end for providing therewith a radially reduced end portion at which said housing is sealingly fitted on the outside wall of said exhaust gas conduit, and radially projected flange portions which extend longitudinally thereof and which are fastened to the corresponding flange portions of the other of said two half sections.
Claim 7
Dependent Claim
59 words
An intake air warming device as set forth in claim 5, in which said partition member has an elongated body portion of substantially semicircular cross section and a radially projected flange portion which extend longitudinally thereof and which are sandwiched between the flange portions of said two half sections of said housing so as to be fixedly carried therebetween.
Claim 8
Dependent Claim
27 words
An intake air warming device as set forth in claim 1, in which said air inlet further includes an air inlet duct which has a bent portion.
Claim 9
Dependent Claim
27 words
An intake air warming device as set forth in claim 1, in which said air outlet further includes an air outlet duct which has a bent portion.
Claim 10
Dependent Claim
21 words
An intake air warming device as set forth in claim 1, in which said exhaust gas conduit is an exhaust pipe.
Claim 11
Dependent Claim
24 words
An intake air warming device as set forth in claim 1, in which said exhaust gas conduit is one branch of an exhaust manifold.
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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |