Patent US3387867A successfully refreshed from Google Patents.
US4515136A
Expired / Lapsed
US
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Supercharged diesel engine air inflow control system
Assignee: Garrett Corp
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Filing: 1983-12-19
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Granted: 1985-05-07
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Expires: 2003-12-19
Abstract
Abstract A control system is provided for a supercharged diesel engine to control engine air inflow in response to an operator-selected fuel flow and in accordance with a predetermined air-fuel ratio schedule chosen for minimizing undesirable exhaust emissions throughout a broad range of engine operating conditions.
Inventors
- 👤 Robert L. Cholvin
- 👤 Charles E. McInerney
- 👤 James N. Nancarrow
- 👤 Jack L. Gantz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:43
CPC Classifications
F; F02; F02D; F02D11/00; F02D11/06; F02D11/08; F02D23/00; F02D23/02; F02D33/00; F02D33/02; F02D9/00; F02D9/02; F02B; F02B3/00; F02B3/06; F02D2009/0201; F02D2009/0215; F02D2009/0228; F02D2009/0232; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
72 words
A method of controlling engine air inflow in a diesel engine system including means for supplying pressurized air to an engine and means for supplying fuel to the engine, comprising the steps of: selectively controlling engine air inflow with a force-biased relief valve responsive to the pressure of air supplied to the engine; and selectively altering the force-bias acting on the relief valve in response to fuel flow supplied to the engine.
Claim 2
Independent Claim
72 words
A method of controlling engine air inflow in a diesel engine system including means for supplying pressurized air to an engine and means for supplying fuel to the engine, comprising the steps of: selectively controlling engine air inflow with a force-biased relief valve responsive to the pressure of air supplied to the engine; and selectively altering the force-bias acting on the relief valve in response to fuel flow supplied to the engine.
Claim 3
Independent Claim
95 words
A method of controlling engine air inflow in a diesel engine system including means for supplying pressurized air to an engine and means for supplying fuel to the engine, comprising the steps of: selecting the flow of fuel to the engine; modulating the position of a force-biased air flow relief valve in response to the pressure of air supplied to the engine; and adjusting the inflow of air to the engine in response to the fuel flow by altering the force-bias acting on said relief valve in response to the fuel flow to the engine.
Claim 4
Independent Claim
95 words
A method of controlling engine air inflow in a diesel engine system including means for supplying pressurized air to an engine and means for supplying fuel to the engine, comprising the steps of: selecting the flow of fuel to the engine; modulating the position of a force-biased air flow relief valve in response to the pressure of air supplied to the engine; and adjusting the inflow of air to the engine in response to the fuel flow by altering the force-bias acting on said relief valve in response to the fuel flow to the engine.
Claim 5
Dependent Claim
21 words
The method of claim 2 wherein said fuel flow selecting step comprises selectively setting the position of a fuel control rack.
Claim 6
Dependent Claim
20 words
The method of claim 2 wherein said air inflow adjusting step comprises selectively diverting excess air flow from the engine.
Claim 7
Dependent Claim
38 words
The method of claim 4 wherein the engine system includes a supercharging device for supplying air to the engine, and further including the step of recycling the diverted air flow to the intake side of the supercharging device.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |