This seems like an interesting concept: a standard/electric turbo hybrid that cranks out boost at low RPM's, and the the standard turbo system works the high end. "The most obvious benefits are improved transient response, boost pressure available at low rpm and low load and greater turbo sizing flexibility - you can rely on the Dynacharger for low-end boost and you can opt for a huge compressor for strong top-end performance."
"Turbodyne Technologies Inc. is a leading engineering company in the design and development of charging technology to enhance the performance of internal combustion engines."
The Turbodyne Dynacharger is an electric assist device that can be adapted to specific turbochargers. The Dynacharger system comprises an electronically controlled ultra high-speed brushless electric motor that's mounted between the turbine and the compressor of a conventional turbocharger, together with an electronic power and speed control system.
Electrically, the operation of the Dynacharger alternates between Motor Mode and Generator Mode. In Motor Mode, the Dynacharger provides the desired boost pressure for low speed engine acceleration. In Generator Mode, the Dynacharger utilizes the otherwise wasted surplus exhaust gas energy by using the turbine to drive the electric rotor. At full engine power, the generator can be used to slow the turbine, and in many cases alleviates the need for a wastegate."
