Patent ID: 9109546
Filing Date: 2015-08-18
Classification: F02B,F02M,Y02T

Abstract:
1. An engine system comprising: an engine; a first turbocharger and a second turbocharger coupled to the engine, the first turbocharger being a high pressure turbocharger with a first turbine and the second turbocharger being a low pressure turbocharger with a second turbine, and further comprising a turbine bypass valve coupled to a turbine bypass around the first turbine, wherein the turbine bypass valve is controlled to open in response to a turbine speed limit being reached; and a compressor bypass valve coupled to the first turbocharger and to the engine, the compressor bypass valve comprises a mechanism that allows the compressor bypass valve to be closed by default and allows the compressor bypass valve to be actuated passively when acted upon by a boost pressure when the boost pressure increases above a predefined pressure threshold, wherein the compressor boost valve actuation is accomplished solely with boost pressure and free of active control circuitry or control logic in response to a mass flow through the engine causing the turbine bypass valve to completely open.