Borgwarner Inc.

Michael Harris

Paul Troxler

Robert Lotz

Robert Malcolm Wallace

Joseph Powell McHenry

Michael Jay Burkett

Brock Fraser

Craig Andrew Colont

Greg Williams

Abhishek Biswas

Drew Yoder

Jeremy Richard Owen Roszko

Joseph Powell Mchenry

In accordance with one aspect of the present disclosure, a turbocharger includes a compressor having a compressor wheel, a turbine provided within a housing, and an exhaust gas recirculation (EGR) flow path. The EGR flow path includes a first fluid connection in the housing and located in proximity to the turbine, a second fluid connection located in proximity to a trailing edge of the compressor wheel, an EGR control valve disposed between the first fluid connection and the second fluid connection, the EGR control valve configured to selectively operate the turbocharger in a low-heat mode having an EGR up to 50% and an operational mode having an EGR rate typically less than 35%.

High efficiency turbocharger with EGR system

A system includes a divided volute turbocharger that delivers compressed air to an internal combustion engine and receives exhaust gas from the internal combustion engine. The turbocharger includes a turbine housing, a first and second volute, and a turbine housing outlet. The system also includes turbine wheel disposed in the turbine housing and a vane ring disposed in the turbine housing between the turbine wheel and the volutes. The vane ring includes a plurality of vanes having an asymmetric vane pattern disposed on a vane ring surface of an annular disk that receives the turbine wheel therewithin to direct and control the flow of exhaust from the volutes into the turbine wheel with generally equal flow while significantly reducing HCF forcing function.

Divided volute turbocharger having vane ring with plurality of vanes having asymmetric vane pattern and system including the same

A turbocharger includes a turbine housing. The turbine housing includes an interior surface defining a turbine housing interior. The interior surface extends between a turbine housing inlet and a turbine housing outlet. The turbine housing also includes a wastegate duct disposed between the turbine housing inlet and the turbine housing outlet and defining a wastegate channel in fluid communication with the turbine housing inlet and the turbine housing outlet. The turbocharger also includes a valve seat and wastegate assembly including a valve movable between a first position and a second position. The turbocharger further includes a diffuser at least partially surrounding the valve seat for uniformly diffusing the flow of exhaust gas into the turbine housing outlet.

Diffuser for diffusing the flow of exhaust gas and a system including the same

A two-stage turbocharging system with a high pressure (HP) turbine and a low pressure (LP) turbine, exhaust piping connecting an engine to the HP turbine inlet, exhaust piping connecting the HP turbine outlet to the LP turbine inlet, piping connecting the LP turbine outlet to an aftertreatment device, and branched bypass piping having an inlet and first and second branches, the inlet connected to the engine to HP turbine inlet exhaust piping, the first branch outlet connected to the LP turbine inlet, the second branch outlet connected to the aftertreatment device, and an R2S valve in the first branch and a warm-up valve in said second branch. By opening of the valve, exhaust gas can bypass both the HP and LP turbines and flow to, e.g., the catalytic converter. The R2S valve and the warm-up valve may be integrated into a single exhaust flow control unit.

Multi-stage turbocharging system with thermal bypass

A wastegate assembly () for a turbocharger () or the like is provided having a support plate (), an actuator (), a linkage () operably connected to the actuator (), and a valve plate () operably connected to the linkage (). The linkage () translates actuation of the actuator () to movement of the valve plate () thereby sealing or unsealing the bypass outlet (). The actuator (), linkage () and valve plate () can be pre-assembled to the support plate () prior to the support plate () being connected to the turbine housing (). The actuator (), linkage () and valve plate () can be calibrated prior to the wastegate assembly () being connected to the turbine housing (). The bypass outlet () can be machined via access provided by the wastegate port ().

Growing community of inventors

Fairview, NC, United States of America

Michael Harris