Turbocharging systems for internal combustion engines
First Claim
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 input and an output and a compressor with an input and an output;
an intercooler having an input and an output;
a first exhaust gas conduit connecting the exhaust gas turbine input with the exhaust manifold, and a first compressed air conduit connecting the turbocharger compressor output with the intercooler input;
a motor-driven charge air compressor having an input and an output with its output connected with the intake manifold;
a two-input proportioning gas control valve having a first input connected with the intercooler output and a second input connected with a second exhaust gas conduit which is connected with the first exhaust gas conduit, and having an output connected with the input of said motor-driven charge air compressor; and
a control, said control operating said two input proportioning gas control valve to mix in controlled proportions compressed air and exhaust gas from said exhaust manifold and admit the mixture to the input of motor-driven charge air compressor.
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Accused Products
Abstract
Internal combustion engine systems can be provided with enhanced engine performance through improved two-stage charge air compression and through improved exhaust gas recirculation in relation to engine load and speed. Improved two-stage charge air compression can be provided with a turbocharger having an exhaust gas turbine and a first stage air compressor driven by the exhaust gas turbine and providing a flow of compressed air at its outlet and a second stage motor-driven compressor having its inlet connected with the flow of compressed air from the turbocharger compressor outlet and its outlet connected with the intake manifold to provide further and highly compressed charge air for the internal combustion engine. Improved exhaust gas recirculation can be provided with a two-input proportioning gas control valve connected in a two-stage charge air compression system to mix in controlled proportions a flow of air, which is preferably compressed air from a first stage compressor, and a flow of exhaust gas from the internal combustion engine and to deliver an EGR mixture of exhaust gas and air for compression as charge air for the engine. A control can be provided with engine operating signals and a signal from an EGR mixture sensor and can control the two-input proportioning valve and one or more motor-driven charge air compressors to provide an optimal EGR charge air mixture and to improve engine operating performance.
277 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;
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a turbocharger having an exhaust gas turbine with an input and an output and a compressor with an input and an output; an intercooler having an input and an output; a first exhaust gas conduit connecting the exhaust gas turbine input with the exhaust manifold, and a first compressed air conduit connecting the turbocharger compressor output with the intercooler input; a motor-driven charge air compressor having an input and an output with its output connected with the intake manifold; a two-input proportioning gas control valve having a first input connected with the intercooler output and a second input connected with a second exhaust gas conduit which is connected with the first exhaust gas conduit, and having an output connected with the input of said motor-driven charge air compressor; and a control, said control operating said two input proportioning gas control valve to mix in controlled proportions compressed air and exhaust gas from said exhaust manifold and admit the mixture to the input of motor-driven charge air compressor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of operating an internal combustion engine with a turbocharger, comprising
intercepting a flow of exhaust gas from the internal combustion engine, directing the flow of exhaust gas for mixing, providing a flow of compressed air from said turbocharger for mixing with the exhaust gas, mixing the flows of compressed air and exhaust gas in controlled proportions into a mixture of exhaust gas and compressed air, controlling the proportions of compressed air and exhaust gas in the mixture by sensing engine speed, determining when the engine is operating below peak torque speed, sensing engine loading, and reducing the proportion of exhaust gas in the mixture as the engine loading increases, directing the mixture of exhaust gas and compressed air to the input of a motor-driven compressor, and compressing the mixture of exhaust gas and compressed air and directing the resulting compressed mixture as charge air for the internal combustion engine.
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19. An internal combustion engine system, comprising
an internal combustion engine including an exhaust manifold and an intake manifold; -
a turbo charger having an exhaust gas turbine with an input and an output and charge air compressor with an input and an output; a first exhaust gas conduit connecting the exhaust gas turbine input with the exhaust manifold for driving the charge air compressor; a motor-drive n compressor having an input and an output; a two-input proportioning gas control valve having an output, a first input and a second input connected with the exhaust gas output of the exhaust manifold; charge air conduit means connecting the turbocharger charge air compressor, the motor-driven compressor and the first input of the two-input proportioning gas valve in series with the intake manifold of the internal combustion engine, and a control, said control operating said two-input proportioning gas control valve to mix in controlled proportions air and exhaust gas from said exhaust manifold for direction to the intake manifold of the internal combustion engine.
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Specification