Turbocharger apparatus

Patent · Tue Aug 03 00:00:00 EDT 1993

OSTI ID:6328894

Leavesley, M G

Variable turbocharger apparatus is described comprising a compressor housing, a compressor mounted for rotation in the compressor housing, a turbine housing, a turbine mounted for rotation in the turbine housing, a first inlet for enabling air to be conducted to the compressor, an outlet for air from the compressor, a second inlet for enabling exhaust gases from an engine to be conducted to the turbine, a chamber which surrounds the turbine and which receives the exhaust gases from the second inlet before the exhaust gases are conducted to the turbine, a piston which is positioned between the turbine and the turbine housing and which is slidable backwards and forwards to form a movable wall separating the turbine from the chamber which surrounds the turbine, a bearing assembly for allowing the rotation of the compressor and the turbine, and a heat shield for shielding the bearing assembly from the exhaust gases, the piston having a plurality of vanes, the piston being such that in its closed position it terminates short of an adjacent part of the turbine housing so that there is always a gap between the end of the piston and the adjacent part of the turbine housing whereby exhaust gases from the chamber can always pass through the gap to act on the turbine, the piston being such that in its open position the gap is increased, and the piston being biased to its closed position against pressure from exhaust gases in the chamber during use of the variable turbocharger apparatus whereby the piston slides backwards and forwards to vary the gap in dependence upon engine operating conditions, and the variable turbocharger apparatus being such that the vanes on the piston enter into slots in the heat shield.

• Assignee: IMS; EDB-93-113715
• Patent Number(s): US 5231831; A
• Application Number: PPN: US 7-992263
• OSTI ID: 6328894
• Resource Relation: Patent File Date: 14 Dec 1992
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
INTERNAL COMBUSTION ENGINES
TURBOCHARGERS
COMPRESSORS
CONTROL
EXHAUST GASES
OPTIMIZATION
PISTONS
TURBINE BLADES
ENGINES
EQUIPMENT
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
MACHINE PARTS
MACHINERY
SUPERCHARGERS
TURBOMACHINERY
WASTES
330603* - Vehicle Design Factors- Engine System
330100 - Internal Combustion Engines