Turbocharging systems for internal combustion engines
First Claim
1. An internal combustion engine system, comprisingan internal combustion engine including an exhaust manifold and an intake manifold;
- a turbocharger having an exhaust gas turbine with an inlet and an outlet and charge air compressor with an inlet and an outlet;
an exhaust gas conduit means connecting the exhaust gas turbine inlet with the exhaust manifold, and a charge air conduit connecting the turbocharger charge air compressor outlet with the intake manifold;
a motor-driven compressor having an inlet and an outlet, with its outlet connected with the inlet of the turbocharger charge air compressor;
a two-input proportioning gas control valve having one inlet open to atmosphere and a second inlet connected with a flow of exhaust from said internal combustion engine and having an outlet connected with the inlet of said motor-driven compressor; and
a control, said control operating said two-input proportioning gas control valve to mix in controlled proportions air from atmosphere and exhaust gas from said exhaust manifold and admit the mixture to the inlet of motor-driven charge air compressor.
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Accused Products
Abstract
Systems with exhaust gas recirculation and two-stage charge air compression include an internal combustion engine having an exhaust manifold and an intake manifold; a turbocharger with an exhaust gas turbine and a compressor, each having an inlet and an outlet; a first exhaust gas conduit connecting the exhaust gas turbine inlet with the exhaust manifold; a charge air conduit connecting the turbocharger compressor outlet with the intake manifold; a motor-driven compressor having an inlet and an outlet, with the outlet connected with the inlet of the turbocharger compressor; a two-input proportioning gas control valve having a first inlet open to atmosphere and a second inlet connected with an EGR conduit connected with the flow of exhaust gas from the internal combustion engine, and an outlet to deliver a mixture of air and exhaust gas to the inlet of the motor-driven charge air compressor; and a control operating the two-input proportioning gas control valve to mix in controlled proportions, air from atmosphere and exhaust gas from the internal combustion engine for further compression of the mixture of air and exhaust gas for the intake manifold of the internal combustion engine. The control can be provided with algorithm for control of the two-input proportioning gas control valve to provide an optimal mixture of recirculated exhaust gas and air for operation of the internal combustion engine with reduced NOx. Such systems can include a bypass conduit and a check valve between the inlet and outlet of the motor-driven charge air compressor, an EGR cooler to provide cooled EGR to the second input of the two-input proportioning gas control valve, an EGR particulate filter or trap, and an intercooler for the compressed charge air.
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Citations
19 Claims
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1. An internal combustion engine system, comprising
an internal combustion engine including an exhaust manifold and an intake manifold; -
a turbocharger having an exhaust gas turbine with an inlet and an outlet and charge air compressor with an inlet and an outlet; an exhaust gas conduit means connecting the exhaust gas turbine inlet with the exhaust manifold, and a charge air conduit connecting the turbocharger charge air compressor outlet with the intake manifold; a motor-driven compressor having an inlet and an outlet, with its outlet connected with the inlet of the turbocharger charge air compressor; a two-input proportioning gas control valve having one inlet open to atmosphere and a second inlet connected with a flow of exhaust from said internal combustion engine and having an outlet connected with the inlet of said motor-driven compressor; and a control, said control operating said two-input proportioning gas control valve to mix in controlled proportions air from atmosphere and exhaust gas from said exhaust manifold and admit the mixture to the inlet of motor-driven charge air compressor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of operating an internal combustion engine, comprising:
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intercepting a flow of exhaust gas from the internal combustion engine, directing the flow of exhaust gas for mixing, providing a flow of air for mixing with the exhaust gas, mixing the flows of air and exhaust gas in controlled proportions into a mixture of exhaust gas and air, controlling the proportions of air and exhaust gas in the mixture, compressing the mixture of exhaust gas and air, directing the compressed mixture of exhaust gas and air to the compressor input of an exhaust gas turbine driven compressor, and further compressing the compressed mixture of exhaust gas and air with the exhaust gas driven compressor and directing the resulting compressed mixture as charge air for the internal combustion engine. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification