Hybrid cars already recover energy wasted whenever the
driver hits the brakes, but soon they'll be able to recover energy wasted by
the hot gasses in the exhaust and convert this to electricity.
The technology that will allow this is an electrified
turbocharger, which Formula One fans will know as the MGU-H (Motor-Generator
Unit Heat).
Mercedes-AMG looks set to be among the first automakers to
introduce electrified turbos to the world of production cars. The company on
Wednesday announced it is close to readying the technology, without saying what
model(s) we'll first see it in.
We know however that AMG's
One hypercar due in 2021 will feature the technology. (Infiniti also
previewed the tech in its Q60 Project Black S concept but that project looks
to be dead in the water.)
AMG will use an electrified turbo called the E-Turbo
developed by Garrett Advancing Motion. The setup features an electric
motor-generator measuring just 1.6 inches thick mounted to the shaft connecting
a turbo's compressor wheel and turbine. The motor-generator actually sits
between the compressor and turbine, and the electricity it generates is stored
in a battery.
When it's not recovering energy, the motor-generator is used
to power the compressor at low revs to help eliminate lag, similar to
technology already
used by AMG and other automakers. The motor-generator can even spin the
compressor wheel when the driver's foot is off the accelerator, so that boost
pressure is ready when the driver hits the loud pedal once again, resulting in
linear engine response. According to AMG, the turbocharger can achieve speeds
of up to 170,000 rpm, resulting in a very high rate of air flow.
by Viknesh Vijayenthiran
http://www.boscheuropean.com
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