Mobility Solutions

Added functions and more driving enjoyment Electric all-wheel drive and torque vectoring: new driving functions for hybrid and electric cars

  • From axle-split all-wheel drive to torque vectoring on each wheel
  • “Putting the brakes on CO2 emissions and accelerating the driver’s pulse”
  • Additional torque and a sensation of driving on rails
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  • July 02, 2014
  • Mobility Solutions
  • Press releases

press release

It is a fact that electrification reduces fuel consumption in hybrid vehicles and enables electric vehicles to travel with zero emissions. Yet for Dr. Rolf Bulander, member of the board of management at Robert Bosch GmbH, there’s more to it than that. “Electromobility is not just a matter of emissions and costs. It’s also a question of dynamics, power and driving enjoyment. In short: electromobility is about going beyond pure calculation to generate more emotion,” says Bulander, who is in charge of powertrain technology at Bosch. The company is working on electric and hybrid drives that can do much more than cut fuel consumption. For example, a new torque-vectoring function features a separate motor to drive each axle or even each individual wheel.

Bosch has already put individual-axle drive into series production with PSA. In the Peugeot 3008 Hybrid4, the electric motor drives the rear axle, while the internal-combustion engine is connected to the front axle. That means anyone who buys this diesel hybrid model gets all-wheel drive as standard. This arrangement is called the axle-split hybrid. Bosch prototypes show that the principle of individual-axle drive could be expanded still further in the future using compact electric motors. Such an expanded torque-vectoring function relies on giving each wheel on the front axle its own electric motor. Roadholding is improved by the way these motors are connected, which lets them brake and accelerate the wheels individually. This function could eventually enhance sports cars’ cornering, even in borderline skid situations, as well as making it easier to handle SUVs on challenging terrain.

Additional torque and a sensation of driving on rails
Purely electric motors can also evoke considerably more emotion. As soon as the driver hits the gas pedal, the torque is there immediately – which lets electric cars pull away from traffic lights as if they had a high-performance combustion engine. One example of this is the Bosch SMG 180/120 electric motor, which powers models such as the smart fortwo electric drive and the Fiat 500e. In hybrid vehicles, however, the electric motor often serves as support. That this can also increase driving enjoyment is shown by the boost-recuperation system. In Bosch’s new 48-volt hybrid, a generator supports the combustion engine with 150 newton meters of torque to deliver plenty of additional forward drive. Bosch’s high-voltage hybrid technology goes even further and enables purely electric driving, for example in the Porsche Panamera plug-in. What’s more, the electrical components support the combustion engine, allowing it to run at its most efficient operating point.

To demonstrate how emotive electrification can be, Bosch has produced prototypes featuring several electric motors that can accelerate individual wheels. This allows precise torque support, which greatly improves vehicle dynamics while also cutting fuel consumption by half. “We’re putting the brakes on CO2 emissions and accelerating the driver’s pulse,” says Dr. Rolf Bulander. Individual control of each wheel creates the sensation that the vehicle is driving on rails – and makes every bend a lesson in how thrilling electromobility can be.

Additional links
Online dossier on electromobility
Bosch compact: Electrification of the powertrain
Online dossier on Boost Recuperation System

Mobility Solutions is the largest Bosch Group business sector. In 2015, its sales came to 41.7 billion euros, or 59 percent of total group sales. This makes the Bosch Group one of the leading automotive suppliers. The Mobility Solutions business sector combines the group’s expertise in three mobility domains – automation, electrification, and connectivity – and offers its customers integrated mobility solutions. Its main areas of activity are injection technology and powertrain peripherals for internal-combustion engines, diverse solutions for powertrain electrification, vehicle safety systems, driver-assistance and automated functions, technology for user-friendly infotainment as well as vehicle-to-vehicle and vehicle-to-infrastructure communication, repair-shop concepts, and technology and services for the automotive aftermarket. Bosch is synonymous with important automotive innovations, such as electronic engine management, the ESP anti-skid system, and common-rail diesel technology.

The Bosch Group is a leading global supplier of technology and services. It employs roughly 375,000 associates worldwide (as of December 31, 2015). The company generated sales of 70.6 billion euros in 2015. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiaries and regional companies in some 60 countries. Including sales and service partners, Bosch’s global manufacturing and sales network covers some 150 countries. The basis for the company’s future growth is its innovative strength. Bosch employs 55,800 associates in research and development at 118 locations across the globe. The Bosch Group’s strategic objective is to deliver innovations for a connected life. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.”

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PI8590 - July 02, 2014

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