The Ring Catalyst as Ultra-compact Solution for Euro 7
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he Ring Catalyst as Ultra-compact Solution for Euro 7
Unrestricted clean mobility is the goal of the development of future powertrain systems. The focus is on robust exhaust gas aftertreatment in the entire engine map with simultaneous CO2 reduction, supported by electrification. Highly effective, turbocharged combustion engines with highly efficient catalytic converter technology are the basic prerequisites for achieving this goal. With the ring catalytic converter, originally developed for truck and non-road applications, Vitesco Technologies Emitec realizes an extremely compact exhaust gas aftertreatment system as an integrated unit consisting of turbocharger and catalytic converter.
MOTIVATION
Will electrified powertrains with combustion engines be the next generation of vehicles, or will development skip directly to battery-electric vehicles? CO2 plays an important role in this discussion. It is worth to say that the discussed CO2 values are based on the current politically manifested tank-to-wheel perspective for CO2 consumption of all vehicles. The CO2 being emitted during the production of the cars, batteries or fuel is not taken into consideration. Also, the production of electrical power with its CO2 emissions according to the actual or future power plant mix is not taken into account, but would change the picture significantly. Since physics sets the limits in thermodynamic efficiency, electrification is needed to improve the cycle and real world efficiency by using the possibility
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AUTHORS
to run the combustion engine for longer times at load points with higher efficiency or switch the engine off under certain driving conditions using the electrical drivetrain only. For example, a consumption advantage of 12 % in urban and cross-country operation was achieved with the Super Clean Electrified Gasoline Vehicle from Vitesco Technologies under real driving conditions. Still the improvement of the combustion engine efficiency itself for the different electrified drivetrains is essential. In addition to the combustion engine, also auxiliary devices such as the tur bocharger must continue being optimized. Combining the turbocharger and catalytic converter saves installa-
Dipl.-Ing. Rolf Brück is Vice President Catalysts and Filters at Vitesco Technologies Emitec in Lohmar (Germany).
Dipl.-Ing. Thomas Härig is Project Manager at Vitesco Technologies Emitec in Lohmar (Germany).
Because the future drivetrain architecture is uncertain and strongly depends on legislation decisions, the challenge for engineering is to develop a catalytic converter system that, ideally, is modular in structure and can be directly attached to the engine. The requirements for the catalytic converter are influenced by the driver’s demands, as is normally the case, as well as by the e-drive’s operating concepts. Straight forward questions have a direct influence on the catalytic converter design and the type of catalytic converter heating measures – for example how long the vehicle will drive on electricity alone, that is wi
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