Charged air intake system for an internal combustion engine
First Claim
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1. A charge air intake system for an internal combustion engine, comprising:
- an air intake plenum for furnishing air to the engine;
a first air supply duct for furnishing air to the intake plenum;
a charge air cooler mounted in line with said first air supply duct for removing heat from air flowing though said first air supply duct;
a second air supply duct for furnishing air to the intake plenum having an upstream junction with the first air supply duct upstream from said charge air cooler and a downstream junction with the first air supply duct downstream from said charge air cooler;
a charge booster mounted upstream of said first and second air supply ducts for increasing the density of air flowing through said ducts from an air inlet; and
a splitter valve mounted at one of said upstream or downstream junction of said first and second air supply ducts for controlling the relative proportion of air flowing through said first and second ducts to said intake plenum.
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Abstract
A charge air intake system for a diesel engine (10) includes a first duct (24) and second bypass duct (30) having its upstream and downstream ends connected to the first duct and bypassing a charged air cooler (28) mounted in line with the first duct (24). An EGR conduit (38) leads from the exhaust manifold to the bypass duct (30). A turbo charger furnished charged air to the ducts where a proportioning valve (26) proportions air between the charge air cooler and the bypass duct.
71 Citations
11 Claims
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1. A charge air intake system for an internal combustion engine, comprising:
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an air intake plenum for furnishing air to the engine;
a first air supply duct for furnishing air to the intake plenum;
a charge air cooler mounted in line with said first air supply duct for removing heat from air flowing though said first air supply duct;
a second air supply duct for furnishing air to the intake plenum having an upstream junction with the first air supply duct upstream from said charge air cooler and a downstream junction with the first air supply duct downstream from said charge air cooler;
a charge booster mounted upstream of said first and second air supply ducts for increasing the density of air flowing through said ducts from an air inlet; and
a splitter valve mounted at one of said upstream or downstream junction of said first and second air supply ducts for controlling the relative proportion of air flowing through said first and second ducts to said intake plenum. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A charge air intake system for an internal combustion engine comprising:
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an air intake plenum for furnishing air to the engine;
a charge booster for increasing the density of air furnished to the air intake plenum;
a first air supply duct for furnishing air from the charge booster to the intake plenum;
a charge air cooler mounted in line with the first air supply duct for removing heat from the charged air flowing through said first duct;
a second air supply duct having an upstream junction with the first air supply duct between the charged booster and the upstream end of the charged air cooler and a downstream junction with the first air supply duct between the downstream end of the charged air cooler and the intake air plenum;
valving mounted in said first air supply duct for proportioning the air flowing through said first and second air supply ducts. - View Dependent Claims (8, 9)
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10. A method of preventing condensation inside the air intake conduits in a diesel engine utilizing exhaust gas recirculation;
- said method comprising;
charging the entire fresh air supply for increasing the density of combustion air to the diesel engine;
selectively proportioning the charged fresh air supply into first and second flow paths;
cooling said fresh air supply passing through said first flow path by a charged air cooler;
sending air flow in said second flow path to an intake plenum bypassing said charged air cooler; and
introducing recirculation exhaust gas into said second flow path;
controlling said selective proportioning to maintain the intake manifold temperature above the intake manifold dewpoint. - View Dependent Claims (11)
- said method comprising;
Specification