Double spiral turbocharger to optimize the pulse energy separation for fuel economy and EGR use via asymmetrical double spirals

摘要

A product for use in a turbocharger system, comprising: a turbine housing (16) defining a central core (40) having a circular shape with a periphery, and wherein the turbine housing (16) has a first volute (20) which extends a length around only part of the circumference of the central core (40), and a second spiral (10) which is arranged radially outside of the first spiral (20) and which extends completely around the circumference of the central core (40) The first scroll (20) and the second scroll (10) define first and second exhaust passages (23, 24) through the turbine housing (16) that are asymmetrical, with all points of the second scroll (10) radially outside of the first coil (20) from the central core (40) lie completely the length of the first coil (20), the first coil being located at some angle along the length of the first coil (20) around the turbine housing (16) e (20) has a first cross-sectional area and the second spiral (10) has a second cross-sectional area, and wherein the second cross-sectional area is constant along the first spiral (20) and extends from one end (45) of the first spiral (20) to one Tongue (27) of the turbine housing (16) reduced.