US3776207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine constant rate exhaust gas recirculation system
Assignee: Ford Motor Co
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Filing: 1972-11-03
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Granted: 1973-12-04
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Expires: 1992-11-03
Abstract
Abstract An engine has a portion of the exhaust manifolding connected at times to the intake system for directing at times a predetermined percentage of the exhaust gases into the engine, while the remainder of the manifolding is connected to a conventional exhaust system, to maintain a constant exhaust gas recirculation rate at times, a diverter valve operable at engine wide open throttle conditions to discharge all of the exhaust gases to the exhaust system, for greater power.
Inventors
- 👤 A Simko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:34
CPC Classifications
F; F02; F02M; F02M26/00; F02M26/65; F02M26/71; F02M26/13; F02M26/22; F02M26/23; F02M26/27; F02M26/42; F02B; F02B2275/00; F02B2275/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
75 words
An exhaust gas recirculating system for an internal combustion engine having a plurality of cylinders and an air intake to the engine, comprising, means for recirculating all of the exhaust gases from a selected number less than all of the cylinders to the air intake and none from the remaining number of cylinders to maintain a constant rate of exhaust gas recirculation throughout at least part of the load range of operation of the engine.
Claim 2
Dependent Claim
75 words
An exhaust gas recirculating system for an internal combustion engine having a plurality of cylinders and an air intake to the engine, comprising, means for recirculating all of the exhaust gases from a selected number less than all of the cylinders to the air intake and none from the remaining number of cylinders to maintain a constant rate of exhaust gas recirculation throughout at least part of the load range of operation of the engine.
Claim 3
Independent Claim
66 words
A method of controlling the output of pollutants from an internal combustion engine comprising the step of directing the entire discharge of exhaust gases from a number of engine cylinders less than all to the engine intake system for mixing with the air therein for recirculation back into the engine, and directing the exhaust gases from the remaining number of cylinders to the engine exhaust system.
Claim 4
Independent Claim
66 words
A method of controlling the output of pollutants from an internal combustion engine comprising the step of directing the entire discharge of exhaust gases from a number of engine cylinders less than all to the engine intake system for mixing with the air therein for recirculation back into the engine, and directing the exhaust gases from the remaining number of cylinders to the engine exhaust system.
Claim 5
Dependent Claim
58 words
A method as in claim 2, including the step of diverting at engine wide open throttle range of operation the entire discharge from the selected number of cylinders away from the air intake and into the exhaust system along with the exhaust gases from the remaining number of cylinders, to increase the maximum power output of the engine.
Claim 6
Dependent Claim
40 words
A method as in claim 2, including the step of directing the exhaust gases from the selected number of cylinders into the air intake system during the entire part load period of operation of the engine including idle speed operation.
Claim 7
Dependent Claim
57 words
A method as in claim 2, including directing all of the exhaust gases from two of the cylinders of an eight cylinder engine or one of the cylinders of a four cylinder engine to the engine intake system to maintain the recirculation thereto of a constant 25 percent of the engine exhaust gases to the intake system.
Claim 8
Dependent Claim
42 words
A system as in claim 1, including first exhaust manifolding connecting the exhaust gases from the selected number of cylinders to the engine intake system, and second Manifolding connecting the exhaust gases from the remaining number of cylinders to the exhaust system.
Claim 9
Dependent Claim
41 words
A system as in claim 6, the air intake system including an engine air cleaner assembly having a fresh air inlet and a filter therein, and conduit means to connect the first manifolding to the clean air side of the filter.
Claim 10
Dependent Claim
52 words
A system as in claim 6, including conduit means connecting the first and second manifolding, and diverter valve means in the conduit means normally closed to prevent communication between the manifolding, but operable in response to predetermined engine operation to bypass the exhaust gases from the first manifolding into the second manifolding.
Claim 11
Dependent Claim
19 words
A system as in claim 6, including heat exhanger means for cooling the exhaust gases in the first manifolding.
Claim 12
Dependent Claim
47 words
A system as in claim 6, the connection between the first manifolding and the air intake system being so constructed and arranged of a length to dampen out pressure pulsations of the gases discharged from the first manifolding prior to mixture with the essentially constantly flowing air.
References Cited (Backward Citations)
DE859237C
Cited
US3542004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |