US20030192516A1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation protection AECD for an internal combustion engine employing cooled EGR
Assignee: Cummins Inc
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Filing: 2002-04-10
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Granted: —
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Expires: 2022-04-10
Abstract
Abstract A system for protecting an internal combustion engine employing cooled recirculated exhaust gas (EGR) from excessive condensation includes an auxiliary emission control device (AECD) operable to determine when engine operating conditions correspond to a condensing condition resulting in condensation of water at the outlet of the EGR cooler and/or within the intake manifold or intake conduit of the engine. When such conditions occur, the AECD is operable to close the EGR valve and monitor engine operating conditions. When engine operating conditions no longer correspond to the condensing condition, control of the EGR valve is restored to an air handling system associated with the engine.
Inventors
- 👤 George Brunemann
- 👤 Larry Brackney
- 👤 Thomas Dollmeyer
- 👤 B. Song
- 👤 Michael Barbieri
- 👤 Matthew Lipinski
- 👤 Wayne Eberhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:30
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/0025; F02D41/0047; F02D41/005; F02D41/0065; F02D41/0072; F02M; F02M26/00; F02M26/02; F02M26/04; F02M26/05; F02M26/13; F02M26/22; F02M26/23; F02M26/28; F02M26/33; F02M26/50; F02B; F02B29/00; F02B29/04; F02B29/0406; F02B29/0493; F02D2200/00; F02D2200/02; F02D2200/023; F02D2200/04; F02D2200/0418; F02D41/22; F02M26/09; F02M26/10; F02M26/45; F02M26/46; F02M26/47; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
149 words
1 . System for protecting an internal combustion engine employing cooled recirculated exhaust gas from excessive condensation, the system comprising: an EGR conduit fluidly connecting an intake manifold with an exhaust manifold of the engine; an EGR valve controlling engine exhaust flow through said EGR conduit; an EGR cooler disposed in-line with said EGR conduit and operable to cool engine exhaust flowing through said EGR conduit; means for determining a temperature value indicative of temperature within said intake manifold; means for determining an amount of water present in a charge mixture of fresh air and engine exhaust supplied to said intake manifold; means for determining an intake condensation state as a function of said temperature value and of said amount of water present in said charge mixture; and means for closing said EGR valve if said condensation state indicates a condensation condition for at least a first time period.
Claim 2
Dependent Claim
149 words
1 . System for protecting an internal combustion engine employing cooled recirculated exhaust gas from excessive condensation, the system comprising: an EGR conduit fluidly connecting an intake manifold with an exhaust manifold of the engine; an EGR valve controlling engine exhaust flow through said EGR conduit; an EGR cooler disposed in-line with said EGR conduit and operable to cool engine exhaust flowing through said EGR conduit; means for determining a temperature value indicative of temperature within said intake manifold; means for determining an amount of water present in a charge mixture of fresh air and engine exhaust supplied to said intake manifold; means for determining an intake condensation state as a function of said temperature value and of said amount of water present in said charge mixture; and means for closing said EGR valve if said condensation state indicates a condensation condition for at least a first time period.
Claim 3
Dependent Claim
146 words
2 . System for protecting an internal combustion engine employing cooled recirculated exhaust gas from excessive condensation, the system comprising: an EGR conduit fluidly connecting an intake manifold with an exhaust manifold of the engine; an EGR valve controlling engine exhaust flow through said EGR conduit; an EGR cooler disposed in-line with said EGR conduit and operable to cool engine exhaust flowing therethrough; a temperature sensor producing a temperature signal indicative of a temperature of coolant circulating through said EGR cooler; means for determining an amount of water present in said engine exhaust flowing through said EGR conduit; means for determining an EGR cooler condensation state as a function of said temperature signal and of said amount of water present in said engine exhaust; and means for closing said EGR valve if said condensation state indicates a condensation condition for at least a first time period.
Claim 4
Dependent Claim
146 words
2 . System for protecting an internal combustion engine employing cooled recirculated exhaust gas from excessive condensation, the system comprising: an EGR conduit fluidly connecting an intake manifold with an exhaust manifold of the engine; an EGR valve controlling engine exhaust flow through said EGR conduit; an EGR cooler disposed in-line with said EGR conduit and operable to cool engine exhaust flowing therethrough; a temperature sensor producing a temperature signal indicative of a temperature of coolant circulating through said EGR cooler; means for determining an amount of water present in said engine exhaust flowing through said EGR conduit; means for determining an EGR cooler condensation state as a function of said temperature signal and of said amount of water present in said engine exhaust; and means for closing said EGR valve if said condensation state indicates a condensation condition for at least a first time period.
References Cited (Backward Citations)
US6216458B1
Cited
US20030114978A1
Cited
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