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Electric turbocompound control system

United States Patent

February 13, 2007
View the Complete Patent at the US Patent & Trademark Office
Turbocompound systems can be used to affect engine operation using the energy in exhaust gas that is driving the available turbocharger. A first electrical device acts as a generator in response to turbocharger rotation. A second electrical device acts as a motor to put mechanical power into the engine, typically at the crankshaft. Apparatus, systems, steps, and methods are described to control the generator and motor operations to control the amount of power being recovered. This can control engine operation closer to desirable parameters for given engine-related operating conditions compared to actual. The electrical devices can also operate in "reverse," going between motor and generator functions. This permits the electrical device associated with the crankshaft to drive the electrical device associated with the turbocharger as a motor, overcoming deficient engine operating conditions such as associated with turbocharger lag.
Algrain; Marcelo C. (Dunlap, IL)
Caterpillar Inc (Peoria, IL)
11/ 010,958
December 13, 2004
U.S. GOVERNMENT RIGHTS This invention was made with government support under the terms of Contract No. DE-FC05-00OR22810 awarded by the Department of Energy. The government may have certain rights in this invention.