Variable a/r turbine housing

Abstract

A turbocharger having a housing. The housing may have a scroll formed therein. The scroll may include a passageway leading between an exhaust inlet and a turbine wheel. A valve or valves may be disposed within the passageway. The valve may regulate airflow through the passageway.

1 . A turbine housing of a turbocharger with butterfly-type valves pivotally positioned in the turbine housing, said butterfly-type valves being disposed within said turbine housing and configured and arranged to:
 a) close and thereby shorten the overall scroll length of the turbine housing to thereby cause exhaust gases to exit into the turbine wheel in a shorter distance; and   b) open and thereby allow the exhaust gasses to travel through the longer length of the scroll.   
     
     
         2 . The turbine housing of  claim 1 , wherein multiple butterfly-type valves are pivotally positioned in the turbine housing, said multiple butterfly-type valves being disposed within the turbine housing and configured and arranged to:
 a) close and thereby shorten the overall scroll length of the turbine housing to thereby cause exhaust gases to exit into the turbine wheel in a shorter distance;   b) open and thereby allow the exhaust gasses to travel through the longer length of the scroll;   c) open and close at different times; and   d) open and close simultaneously.