Patent ID: 11965470
Assignee: BORGWARNER INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 17:
18. An exhaust gas recirculation (EGR) control valve for a turbine volute, the EGR control valve comprising:
a valve member configured to be disposed in a turbine volute and operationally connected to an actuator, the valve member including a sealing flap including a sealing surface with rounded edges;
an EGR outlet duct configured to be mated to a turbine volute opening and provide for an EGR flow path;
an actuator configured to move the valve member between a first position and a second position to selectively provide fluid communication between: (a) the turbine volute and the EGR flow path, or (b) the turbine volute and a turbine exhaust path, or (c) the turbine volute and both the EGR flow path and the turbine exhaust path; wherein:
in the first position, the valve member is disposed over the turbine volute opening and the turbine volute opening is sealed closed by the valve member;
in the second position the EGR flow path is provided from the turbine volute through the turbine volute opening to the EGR outlet duct and the turbine exhaust path is substantially blocked by the valve member; and
in an intermediate position disposed between the first and second position, the turbine exhaust path is partially blocked and the EGR flow path is provided from the turbine volute through the turbine volute opening to the EGR outlet duct;

a valve position indicator configured to output a valve position of the valve member; and
an EGR pressure sensor configured to determine and output an exhaust gas pressure.