Benefits such as improved low
speed engine torque in combination with engine downsizing, downspeeding and
brake energy recuperation allow for significant fuel efficiency enhancements.
On a demonstration vehicle, a heavy pickup truck, the synergy between the
components enables energy efficient means to collect regenerated energy and
provide added torque, faster engine response, and extended engine off operation
among a list of added features.
The current trend toward
48-volt electrified vehicles is growing as the automotive industry faces two
important challenges. Vehicles need to be more efficient to meet stringent
emissions regulations and even a 48-volt architecture has limited electrical
energy storage. Also, more electrical power is needed to support added vehicle
features.
In response to these challenges “At
BorgWarner, we are constantly working on improving our system technology
solutions. The combination of our eBooster technology with the MGU presents an
ideal 48-volt capable solution for our customers and strengthens our position
as a supplier of choice,” said Robin Kendrick, President and General Manager,
BorgWarner Turbo Systems.
BorgWarner’s compact eBooster
electrically driven compressor is independent of the exhaust gas flow, as it
uses an electric motor to drive the compressor wheel. It provides outstanding
low-end torque and can be installed in different locations of the air path with
an actively controlled bypass valve next to it. High system efficiency as well
as extraordinary power density and improved acceleration time virtually
eliminate turbo lag. The technology reduces pumping losses, and – due to higher
low end torque – allows for the possibility of further downsizing and
downspeeding.
Powerful and Flexible MGU Replaces Conventional Generator
BorgWarner’s advanced MGU is
usually located within the powertrain architecture to facilitate hybrid
functions. Replacing the conventional generator, the more powerful MGU is
connected to the engine via a front-end accessory drive. Its position can be varied,
depending on the architecture and integration needs. Different available
configurations also allow for varying performance characteristics. Capable of
adding as well as subtracting torque, the technology captures sufficient
regenerative electrical energy to supply the vehicle’s electrical loads with
additional electrical energy to save fuel. The 48-volt MGU, which has a
capability of 25 kW input and output, also provides quick and smooth engine
starts. In addition, BorgWarner provides a motor generator with integrated
electronics (MGI) which offers multiple electromagnetic variants to meet
varying performance requirements.
Source: BorgWarner