Peter Schöggl

Fahrbarkeitsuntersuchungen auf dem Rollenprüfstand

Seit Einfuhrung des Systems AVL-Drive zur Beurteilung des Fahrverhaltens konnte das Gesamtsystem erheblich verbessert werden. Mittlerweile konnen Fahrbarkeitsanalysen von der Strase auf den Rollenprufstand verlagert werden, wodurch Basis-Applikationsaufgaben und Feinabstimmungen am Fahrzeug schneller und besser reproduzierbar durchgefuhrt und verifiziert werden konnen.

Driveability analyses on a chassis dynamometer

Since introducing AVL-Drive as objective vehicle driveability assessment tool the entire system has been improved considerably. Nowadays, more driveability measurements are done on the roller chassis dynamometer to perform basic Engine and Transmission application tasks and fine adjustments much quicker with improved reproduction quality.

Vehicle integration of a new engine concept for 48 Volts – opportunities for efficiency improvement and optimization of the overall system complexity

To achieve fleet fuel consumption legislation of 95g/km CO2 in 2020, various electrification measures will be introduced, besides engine measures, to reduce the overall energy demand of the vehicle. 48V architecture represents an attractive compromise between the standard 12V system and high voltage hybrid systems. The 48V system offers on the one hand already attractive performance potential for moderate hybridization steps, on the other hand, opportunities open up for the electrification of the internal combustion engine (ICE) and its auxiliaries as well as other vehicle components with high power demand. Current belt starter-generator systems already realise direct recuperation and torque boost functions. Additionally they can support a highly effective electrical supercharging system which is clearly superior to current multi-stage turbocharging concepts, particularly in transient response. With flywheel startergenerator concepts, additional functions open up such as purely electric driving in a limited range, or simplification of the base engine towards the goal of a beltless engine. Demand controlled, electrical auxiliaries are already in series production for the cooling-, vacuum- or air conditioning systems. Additional areas of interest are the oil system and variable elements in the valve train or crank train.

Objektive Ratingmethode für Handling- und Komfortkriterien für den Einsatz im Fahrversuch und in der Simulation (Objective method for rating ride and handling criteria in simulation and vehicle testing)

Die AVL List GmbH beschaftigt sich in Kundenprojekt im Rennsport und im Serienfahrzeugbau seit vielen Jahren mit der Optimierung von Fahrwerkssystemen hinsichtlich Performance, Handling und Fahrkomfort. Im Rahmen dieser Tatigkeiten galt und gilt es, Methoden anzuwenden die die Qualitat der Funktion eines Fahrwerks wiedergeben. Ist diese im Rennsport meist einfach uber die Rundenzeitdifferenz darstellbar, stellt sich die Anforderungen im PKW Bereich komplexer dar, da hier in der Abstimmung ein Kompromiss aus agilem Handling, Fahrstabilitat und Fahrkomfort gefunden und bewertet werden muss.

Tools for Optimising the Performance and Durability of Race Engines

The transient performance of a race engine influences lap time, aerodynamic stability, vehicle handling, driveability and tyre wear. Mandatory standard engine control units with limited control strategies must be specifically mapped for every race. The tools presented in the following can improve engine behaviour and lead to a faster lap time, lower tyre stress and enhanced driveability. AVL is the world’s largest privately owned and independent company for the developement of powertrain systems with internal combustion engines as well as instrumentation, test systems, advanced simulation tools and development methodologies.

Chassis dynamometers as an essential part of the vehicle development process

Despite the development of new simulation software, vehicle chassis dynamometers are still becoming increasingly important. Ever more complex vehicle technology and new demands resulting from environmental protection requirements and purchasing behaviour make it necessary to devise new tests. The application range of the test systems has therefore been expanded, and AVL DRIVE now allows vehicle chassis dynamometers to be used to test vehicle driveability.