Parallel Full Hybrid Technology from Bosch Goes into Series Production for Volkswagen Touareg and Porsche Cayenne S

oLaunch of first full hybrid vehicles with parallel technology that allows vehicles to run on internal combustion, electric or combined power

oFuel consumption lower by up to 40 per cent compared to 1st-gen V8 vehicles

oModels to complement alternative energy initiatives in the Middle East

Bosch, the world's largest supplier of automobile components, has recently started the production of parallel full hybrid technology for the new hybrid Volkswagen Touareg and Porsche Cayenne S sport utility vehicles (SUVs). The parallel full hybrid system allows the car to run on internal combustion, electric or combined power. Both car models are being offered as 'parallel full hybrids' for the first time and will particularly interest markets such as the Middle East which is exploring broader alternative energy use.

The hybrid vehicles feature the Bosch Integrated Motor Generator (IMG), a water-cooled electric motor that includes a separate clutch. The compact hybrid module, located between the internal-combustion engine and the transmission, can generate 34 kilowatts of power and a maximum torque of 300 Newton meters. The SUVs can thus cruise at a maximum of 50 to 60 kilometres per hour via pure electric power, provided the nickel metal hydride (NiMH) battery is sufficiently charged.

A 'power boost' function allows the electric motor and combustion engines to work together and propel the vehicles from 0 to 100 kilometres per hour in 6.5 seconds. This increases performance to 279 kilowatts (380 horsepower), for a maximum torque of 580 Newton meters. Fuel consumption can thus be reduced by as much as 40 per cent compared to first-generation V8 vehicles.

"The collaboration with Volkswagen and Porsche enabled Bosch to apply its extensive experience in the development of gasoline injection systems to come up with a pioneering hybrid framework for two of the most popular SUVs in the market. These vehicles are a perfect fit to the increasingly environmentally conscious Middle East, which is fast emerging as a hub for alternative energy development. We will be observing how these models perform in the region's unique driving environments and provide feedback that will help in Bosch's goal of further streamlining its hybrid systems," said Guido Gring, Sales Director of Automotive Aftermarket Division, Robert Bosch Middle East FZE.

The Bosch Motronic control unit manages the combustion engine at high levels of precision, adjusting even the rate of individual injections. It uses an additional Controller Area Network bus interface exchange all relevant data with the hybrid component, power electronics, and battery. The setup results in a highly efficient direct injection system that significantly reduces exhaust emissions.

Parallel full hybrid technology can be more cost-effective compared to other hybrid concepts, due to features such as the use of a single electric motor that alternates as a motor and a generator. Bosch is currently fine-tuning each component of hybrid systems to meet key goals such as reducing the space occupied by power electronics. The company's developers have been able to reduce the volume of power electronics by one third to 10 litres and are aiming for next-generation 5-liter configurations.

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