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US 4,050,430 AGranted
Intake air warming device
AssigneeNissan Motor Co., Ltd.
InventorsSusumu Amagai, Shigeru Oikawa
Life of this patent
Estimating the term…
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.
Claims10
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.
4 more elements
Dependencies are inferred from the claim text.