Integrally mounted pneumatic solenoid valve for wastegate control

A turbocharger for internal combustion engines comprising:

• a turbine housing having a turbine rotatably disposed therein;
• a compressor housing having a compressor rotatably disposed therein, the compressor housing including an air intake for receiving air therein and a volute for receiving air pressurized by the compressor;
• a boss integral with the compressor housing and extending substantially perpendicularly from an outer surface thereof, the boss having a first bore extending substantially parallel to an axis of rotation of the turbine and compressor, said first bore communicating at a first end with the volute and terminating at a second end in an attachment fitting, the boss further having a second bore extending substantially perpendicular to the first bore and substantially tangential to the outer surface and intersecting the first bore, the second bore terminating at an aperture in a planar mounting face on the boss, the boss additionally including a third bore extending from said planar mounting face to said air intake in the compressor housing;
• a solenoid actuated valve mounted on said planar mounting face and having a poppet adapted to seal the second bore aperture in a first position and connect the aperture to a flow path in a second position, the flow path communicating with the third bore;
• and
• a control means for energizing the solenoid.