Schaeffler Group revealed today its new CO2ncept-10% vehicle, a new car based on the Porsche Cayenne which will be presented at the ATZ/MTZ Congress focusing on Friction Reduction in the Powertrain to be held on December 9-10 in Esslingen. What is so special about this car?
Well, it appears that the CO2ncept-10% was developed by Porsche and the Schaeffler Group and involves the use of novel and optimized components in order to achieve a reduction of 10% in fuel consumption and CO2 emissions. The car you see in the photos is a Porsche Cayenne with a V8 engine, but the engine, according to Schaeffler, accounts for 5.8% of the optimization of fuel consumption and the associated CO2 emissions.
These results (almost 4.1%) were obtained by modifying the VarioCam Plus valve control system through the replacement of hydraulic cam phasers by electromechanical cam phasers and by using of optimized switching tappets on the intake side.
The rest of 1.7% was obtained due to the minimized frictional loss through the cross-system optimization of components in the valve train, belt drive and chain drive. Another 1.1% was obtained using double-row angular contact ball bearings installed in the front and rear axle differentials, replacing the used tapered roller bearings and reduce frictional resistance considerably.
The chassis also helped the manufacturer to reduce the fuel consumption by replacing the hydraulic roll stabilizer with an electromechanically controlled equivalent and using smooth-running wheel bearings brought about a consumption benefit of 3.2%.
"As in the case of the cam phasers, the electrically operated components make such an important contribution because they require energy only when their operation is requested. In hydraulically controlled systems, the pumps have to maintain pressure permanently, resulting in much higher energy requirements." explains Dr. Robert Plank, Manager of Corporate Engineering for the Schaeffler Group.