Control arrangement for an hydraulic assist turbocharger
 A control arrangement is provided for controlling the operation of an hydraulic assist turbocharger of the type including an hydraulic turbine driven by an hydraulic fluid under pressure to supplementally drive a turbocharger during engine operating conditions when supplemental air flow is required. The control arrangement includes a dual function control valve responsive to engine speed and load to regulate the supply of hydraulic fluid to the hydraulic turbine in accordance with engine air flow requirements. 
The Garrett Corporation
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inventional additional inventional additional
Joe L. Robert J.
Byrne Kobayashi