US3918262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot exhaust gas recirculating system for a stirling engine
Assignee: Ford Motor Co
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Filing: 1974-09-05
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Granted: 1975-11-11
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Expires: 1994-09-05
Abstract
Abstract An apparatus for a Stirling type engine is disclosed which is effective to aspirate spent exhaust gases into a downstream jet eminating from the outlet of a blower for the induction system of the engine.
Inventors
- 👤 Norman D Postma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:59
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/055; F02G2244/00; F02G2244/50; F02G2258/00; F02G2258/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
148 words
In a Stirling type engine, having an external heating system for operating a closed high pressurized working gas system, the combination comprising: a. a heat source circuit having an induction portion, a combustion portion and an exhaust portion, b. variable speed blower means in said circuit having an outlet, said blower means being effective to draw ambient air along a streamline into said induction portion, c. a recirculation passage connecting said exhaust portion and induction portion, and d. connection means having an aspirator, said means providing a joint between said recirculating passage, induction portion, and blower outlet, said aspirator being located at the immediate outlet of said blower to maximize flow velocity and provide a variable pressure differential between the pressurized low temperature blown air and the high temperature low pressure exhaust gases, said differential being varied in direct response to the outlet velocity of said blower means.
Claim 2
Dependent Claim
148 words
In a Stirling type engine, having an external heating system for operating a closed high pressurized working gas system, the combination comprising: a. a heat source circuit having an induction portion, a combustion portion and an exhaust portion, b. variable speed blower means in said circuit having an outlet, said blower means being effective to draw ambient air along a streamline into said induction portion, c. a recirculation passage connecting said exhaust portion and induction portion, and d. connection means having an aspirator, said means providing a joint between said recirculating passage, induction portion, and blower outlet, said aspirator being located at the immediate outlet of said blower to maximize flow velocity and provide a variable pressure differential between the pressurized low temperature blown air and the high temperature low pressure exhaust gases, said differential being varied in direct response to the outlet velocity of said blower means.
Claim 3
Dependent Claim
39 words
The combination as in claim 1, in which said aspirator means comprises a nozzle disposed about the outlet of said blower to create a jet of blown air and a low pressure zone surrounding said jet of blown air.
Claim 4
Dependent Claim
72 words
The combination as in claim 1, which further comprises a preheating wheel effective to exchange a substantial portion of the heat content of said spent gases to the streamline of inducted air at a location downstream from said connection means, said inducted air thus being heated by two paths, one including the preheater wheel and the other including the latent heat of said exhaust gases which are recirculated to said inducted air.
References Cited (Backward Citations)
US2986882A
Cited
US3456438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |