Garrett Transportation I Inc.

Lucie Kovarova

Vit Micanek

Antonin Forbelsky

Petr Balon

Miroslav Protiva

Philippe Renaud

A turbine housing assembly is disclosed, the assembly including a turbine housing defining a rotational axis for a turbine wheel. The assembly further includes a cartridge that is receivable by the turbine housing, the cartridge including spacer posts and a plate component that includes spacer post openings. The spacer posts may be laser beam welded into the spacer post openings to form laser beam welds as well as define an axial vane clearance between the plate component and a surface of the turbine housing. The turbine housing is further contacted by ends of the spacer posts. Each of the laser beam welds includes a power ramp-up area, an intermediate area and a power ramp-down area, where the power ramp-down area curves away from the power ramp-up area to reduce weld defects.

Turbocharger turbine assembly having post attachment via a tailed laser beam weld

A turbocharger includes a variable-nozzle cartridge having a nozzle ring that supports an array of variable vanes in the turbine nozzle. A heat shroud and spring assembly is disposed in a space bounded between the turbine wheel, the nozzle ring, and the center bearing housing of the turbocharger. The heat shroud and spring assembly includes discretely formed heat shroud and spring components configured as annular non-planar disk-shaped parts. The heat shroud and spring are in contact with each other at their radially inner and radially outer peripheral regions, but are spaced apart between those peripheral regions, thereby creating a sealed-off dead space between them. The dead space can significantly reduce the maximum temperature of the spring, relative to arrangements having a single shroud or having dual shrouds with no dead space between them.

Growing community of inventors

Brno, Czechia

Lucie Kovarova