BorgWarner’s eTurbo Powers High-Voltage Hybrids
BorgWarner’s eTurbo will power the high-voltage hybrid vehicle of an undisclosed major European OEM. BorgWarner’s electric boosting technology increases engine efficiency and performance while meeting emissions regulations. This will be the first application of its electrically-assisted turbocharger in a high-voltage hybrid.
“Our eTurbo with integrated power electronics is able to deliver electrified boost assistance and recuperation to a wide range of vehicles,” said Joe Fadool, President and GM, BorgWarner Emissions, Thermal and Turbo Systems.
“BorgWarner has a long history with this manufacturer, and we are excited to deliver enhanced engine efficiency and performance with this application.”
The eTurbo mechanical turbocharger has an ultra-high-speed electric motor coupled to the shaft, which can serve as either a motor or a generator. Integrated or semi-integrated power electronics are options.
BorgWarner’s eTurbo provides electrified boost assistance for enhanced response along with standard turbocharger advantages. Claiming a 200 percent faster transient boost response, the eTurbo is said to have a 50 percent reduction in time-to-torque, reducing turbo lag and aiding engine downsizing.
The turbocharger works well with Miller cycle engine concepts, delivering improved fuel economy and reduced emissions without loss of performance.
BorgWarner’s eTurbo can also serve as a generator, able to collect excess exhaust energy and convert it into electrical energy. Repurposing the energy is effective for accessory power or battery charging, enabling smaller battery size usage.
Additional benefits include its ability to decrease emissions through aftertreatment management and air-fuel ratio control.
By having the ability to increase engine backpressure to reduce emissions, the eTurbo supports on-demand exhaust gas recirculation.
High-voltage, eTurbocharged hybrid vehicle production will begin in September 2023.
Audi is one of BorgWarner’s most important customers, according to BorgWarner’s newsletter. BorgWarner Turbo Systems is the sole supplier for all turbocharged Audi compression ignition (CI) engines.