US 11,965,470 B2
High efficiency turbocharger with EGR system
Joseph Powell McHenry, Arden, NC (US); Paul Troxler, Asheville, NC (US); Robert Malcolm Wallace, Candler, NC (US); Michael Harris, Fairview, NC (US); Robert Lotz, Asheville, NC (US); and Michael J. Burkett, Indianapolis, IN (US)
Assigned to BorgWarner Inc., Auburn Hills, MI (US)
Filed by BorgWarner Inc., Auburn Hills, MI (US)
Filed on Jun. 28, 2022, as Appl. No. 17/851,366.
Application 17/851,366 is a division of application No. 16/553,227, filed on Aug. 28, 2019, granted, now 11,408,362.
Claims priority of provisional application 62/820,057, filed on Mar. 18, 2019.
Claims priority of provisional application 62/723,910, filed on Aug. 28, 2018.
Prior Publication US 2022/0325674 A1, Oct. 13, 2022
Int. Cl. F02D 41/00 (2006.01); F02D 19/02 (2006.01); F02D 43/04 (2006.01); F02M 26/48 (2016.01)
CPC F02D 41/0077 (2013.01) [F02D 19/027 (2013.01); F02D 43/04 (2013.01); F02M 26/48 (2016.02)] 20 Claims
OG exemplary drawing
 
1. An exhaust gas recirculation (EGR) control valve for a turbine volute, the EGR control valve comprising:
a sealing flap operationally connected to a rotational drive mechanism at a proximal end, the sealing flap including a sealing surface that includes rounded edges;
an EGR outlet duct configured to be mated to a turbine volute opening and provide for an EGR flow path; and
the rotational drive mechanism is configured to move the sealing flap between 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 turbine volute opening is sealed closed by the rounded edges mating with a chamfered edge of the turbine volute opening;
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
in an intermediate position disposed between the first and second position, the turbine exhaust path is partially blocked by the sealing flap and the EGR flow path is provided from the turbine volute through the turbine volute opening to the EGR outlet duct.