Variable geometry turbine
AssigneeHolset Engineering Company Limited
InventorBrian E. Walsham
Life of this patent
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Abstract
A variable geometry turbocharger for an internal combustion engine in which the position of the nozzle ring is adjusted to control the width of an exhaust gas inlet passage. A chamber is defined behind the nozzle ring which communicates with the inlet passage and the pressure within that chamber is monitored. The monitored pressure is used as a control parameter for a mechanism which displaces the nozzle ring. Positioning a sensor in the recess behind the nozzle ring protects the sensor from the relatively more extreme environment within the engine exhaust gas manifold.
Claims2
A variable geometry turbine for an internal combustion engine, the turbine comprising:
- a housing having an annular exhaust gas inlet passage defined between walls of the housing;
- a nozzle ring which is displaceable across the inlet passage;
- means for controlling the displacement of the nozzle ring in response to variations in at least one sensed parameter, the nozzle ring extending into an annular recess defined by the housing in one side wall of the inlet passage to form a chamber;
- means for establishing fluid communication between the inlet passage and the chamber;
- a pressure sensor, and;
- means connected to and positioned to communicate the pressure within the chamber defined between the housing and the nozzle ring to the pressure sensor, the control means being responsive to variations in the sensed pressure.
Dependencies are inferred from the claim text.