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US 5,207,063 AGranted
Turbocharger system for internal combustion engine and method of operation
AssigneeAlliedSignal Inc.
InventorJames E. Blake
Life of this patent
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AssigneeAlliedSignal Inc.
InventorJames E. Blake
Estimating the term…
A method and apparatus for providing charge air to the intake manifold of an internal combustion engine at high pressure levels at low engine speeds without compressor surge provides an auxiliary turbocharger which receives a portion of the compressed air produced by a main turbocharger at low exhaust gas flow conditions. The remainder of the compressed air generated by the turbocharger under such low exhaust gas flow conditions is communicated through the compressor section of the auxiliary turbocharger, where the pressure of the compressed air is further increased to a level sufficient to provide charge air at an adequate pressure level to the intake manifold of an internal combustion engine to permit efficient operation of the engine with minimal emissions at low engine speeds. An alternate embodiment of the invention provides a control that directs exhaust gas through the turbine of the auxiliary compressor at high engine speeds, so that the auxiliary compressor at such high engine speeds acts as a sequential compressor, further compressing the compressed air generated by the main turbocharger.
Method of providing charge air to the intake manifold of an internal combustion engine, comprising the steps of using exhaust gasses produced by said engine to operate a main turbocharger to compress air passed through the main turbocharger to generate compressed air, determining when a low exhaust gas flow condition of said engine exists, and using a portion of the compressed air generated by said main turbocharger during said low exhaust gas flow condition to power an auxiliary turbocharger, and using said auxiliary turbocharger to boost the pressure of the charge air delivered to said intake manifold under such low exhaust gas flow conditions.
Turbocharging system for supplying charge air to the intake manifold of an internal combustion engine comprising a main turbocharger having a turbine portion responsive to exhaust gasses generated by said engine for operating a compressor portion for compressing air for providing charge air to the intake manifold of said engine, and an auxiliary turbocharger operated by a portion of the compressed air generated by the compressor portion of the main turbocharger for boosting the pressure of the charge air in the intake manifold, and control means responsive to predetermined engine operating conditions for controlling communication of said portion of the compressed air to the auxiliary turbocharger.
Dependencies are inferred from the claim text.