Automotive Engineering - May 2021 - 7
TECHNOLOGY REPORT
CVT4EV results in lower torque/speed requirements for the
electric motor, the sound of [the traction motor's] rpm also is
reduced, improving comfort even more. "
Pushbelt
variator of
the kind used
for Bosch's
new CVT4EV
continuously
variable
transmission
for electric
vehicles.
BOSCH
Modeled for optimized performance
The CVT4EV concept uses " numerous Bosch components "
and was developed by Bosch Transmission Technology BV,
according to the supplier. Bosch worked with Eindhoven
University of Technology (TU/e) PhD candidate Caiyang Wei
on design and optimization of the electric CVT. Wei and
Bosch used an optimization method that considers not only
the control of the car's speed, energy consumption and heat
production, but also the physical design of the car's electric
motor and transmission system.
With this method - a combination of machine learning
and a thorough analysis of the measurement data - the researchers said they were able to design a system that is optimal in terms of both performance and efficiency, while at
the same time reducing the total costs for both the manufacturer and the user.
Important to note about the CVT4EV development is that
Bosch does not make transmissions. Rather, it develops and
produces the steel pushbelts at the heart of any CVT. The
company stated that it " supports customers with transmission
concepts for ICE, hybrid, and EV applications, " adding, " Full
CVT4EV solutions are available through Tier-1 suppliers. "
Bosch's testing of the CVT4EV in a 150-kW (201-hp)
C-segment vehicle showed a 3% reduction in 0-100 km/h
HV Connector
ICU
HV Junction
Block
(Integrated
Central control Unit)
HV/LV Wiring Harness
AUTOMOTIVE ENGINEERING
Built-in Cam
Battery Disconnect Unit
Free Info at http://info.hotims.com/79441-703
HV Charging
Coupler
B FA
(Busbar Frame Assembly)
May 2021 7
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Automotive Engineering - May 2021
Table of Contents for the Digital Edition of Automotive Engineering - May 2021
Automotive Engineering - May 2021 - SPONSOR1
Automotive Engineering - May 2021 - CVR1
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Automotive Engineering - May 2021 - CVR3
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