For Porsche’s 918 Spyder, the Panamera S E-Hybrid and the
Cayenne S E-Hybrid that are basically plug-in hybrids, the company relies on an
innovative drive system from Bosch. The possibilities offered by the
combination of an internal combustion engine and an electric motor are very
impressive in these models.
"We promised to redefine driving pleasure, efficiency
and performance with the 918 Spyder. We kept our word, and in so doing
repositioned hybrid technology", says Wolfgang Hatz, Member of the
Executive Board – Research and Development at Porsche AG. The Porsche 918
Spyder was the first globally road-legal car to complete the 20.6 kilometre lap
of the North Loop of the Nürburgring in less than seven minutes. At exactly six
minutes and 57 seconds, this super sports car with plug-in hybrid drive beat
the existing record by 14 seconds. Porsche also integrated the knowledge gained
from the development of the technology demonstrator into the electrification of
the rest of its model range. The Panamera S E-Hybrid and Cayenne S E-Hybrid
round off the product range and make Porsche the global market leader for
hybrid cars in the premium segment.
"Porsche and Bosch have teamed up to bring
electrification to electrifying sports cars together. Electricity gives added
driving pleasure and efficiency", says Dr. Rolf Bulander, Chairman of the
Business Sector Mobility Solutions at Bosch. For the three plug-in models made
by Porsche, Bosch supplies the power electronics, the battery pack, the
electric motors for the Cayenne and Panamera and the electric motor installed
on the front axle of the 918 Spyder.
The project definition for the 918 Spyder's development team
was to build the super sports car for the next decade with a highly efficient
and high performance hybrid drive. The completely new development, which
logically started from scratch on a blank piece of paper, allows a new concept
without having to make any concessions. The whole car was designed around the
hybrid drive. The 918 Spyder thus highlights the potential of hybrid drives,
i.e. the simultaneous increase in efficiency and performance, without one
coming at the expense of the other. Thanks to the SMG 180/120 electric motor
developed by Bosch, the Porsche 918 Spyder has an additional 286 hp of driving
power. The electric motor on the front axle of the 918 Spyder delivers a torque
of 210 Nm right from the start, while the motor on the rear axle delivers 375
Nm. The result is a total system output of 887 hp with a maximum torque of up
to 1,280 Nm, allowing the 918 Spyder to accelerate from 0 to 100 km/h in a mere
Meanwhile, the driving experience of a sports car combined
with the consumption of a small car – the Porsche Cayenne S E-Hybrid and
Panamera S E-Hybrid prove that these two are not contradictory to each other.
The world's first plug-in hybrid amongst the premium SUVs with a system output
of 416 hp achieves an NEDC fuel consumption of just 3.4 l/100 km. The plug-in
hybrid model of the Porsche Gran Turismo, which also has a system output of 416
hp stands out thanks to its weight advantage, rear-wheel drive and low drag,
giving it a fuel consumption of just 3.1 l/100 km.
In the plug-in hybrid models of the Porsche Cayenne and
Panamera, Bosch's IMG-300 electric motor provides additional electrical
propulsion. It gives a boost of up to 310 Nm of additional torque and provides
95 hp of additional power. The central interface between the electric motor and
the battery is the INVCON 2.3 module made by Bosch. The power electronics are
the control centre of the electric powertrain, because the system converts the
direct current stored as energy in the battery into three-phase alternating
current for the electric motor and vice versa. The traction battery stores the
electricity in the powertrain. It is made up of prismatic cells with an energy
capacity of 9.4 kilowatt hours in the Panamera S E-Hybrid and 10.8 kilowatt
hours in the Cayenne S E-Hybrid that can be fully charged from a normal
household power socket in less than four hours. Using a high current power
supply, the charging time is almost halved to a good two hours.
Source: Bosch / Porsche
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