Electrically-assisted turbocharger
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An electrically-assisted turbocharger (EAT) is a turbocharger that includes an electric motor to assist in powering the compressor,[1] particularly at times when the exhaust gas flow is insufficient to produce the desired boost.
History
BorgWarner tested the idea in the 1990s, but never produced a part for production vehicles because of high power consumption, until the Mercedes-Benz M256 engine, which used a 48-volt electrical system.[2] In the late 1990s, Turbodyne also investigated EAT designs.[3]
In 2010, Volvo started to add electric booster for turbocharger, resulting in High Performance Drive E Powertrain Concept engine, which used a 48-volt electrical system for the electric booster.[4]
In October 2019, Garrett Motion Inc. announced its first electric turbocharger for market passenger vehicles, with expected launch in 2021.[5][needs update] The design adds an electric motor between the turbocharger's turbine wheel and compressor wheel.
The first production car to use an electrically-assisted turbocharger is the 2023 Mercedes-AMG SL 43 convertible.[6]
Related devices
An electric supercharger also uses an electric motor to power the compressor, however the electric motor is the sole power source in an electric supercharger.
A turbocharger that can divert some of the exhaust gas to produce electricity (using the vehicle's alternator) is sometimes called a hybrid turbocharger.[7]
References
- ^ "Electric Boost". www.autospeed.com. Retrieved 20 June 2022.
- ^ "A Little Fan That Fixes the Turbocharger's Biggest Problem".
- ^ "AlliedSignal and Turbodyne to Jointly Develop Mass Production Capabilities". www.theautochannel.com. Retrieved 20 June 2022.
- ^ "Volvo Bets Its Future on Small, Turbocharged Engines".
- ^ "Garrett To Launch Industry's First Electric Turbo".
- ^ "2023 Mercedes-AMG SL 43 has electric-boosted turbo for zero lag". www.autoindustriya.com. Retrieved 20 June 2022.
- ^ "Hybrid Turbocharger, Ship Marine Engine Turbocharger, High Speed Motor for Marine Applications, Marine Power Generation, High Speed Generator, Marine Engine Heat Recovery". www.calnetix.com. Retrieved 20 June 2022.
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