Showing papers in "ATZ worldwide in 2017"

Simulation-based Development Process for Motor Sport and Series Production

Abstract: The Porsche development centre in Weissach (Germany) is home to both of the vehicle series production development as well as the motor racing application and development departments. We can see clear parallels when we look at the tasks and challenges involved in the development of road vehicles and racing cars. Both areas only have short development periods and limited resources available. These overlaps suggest there ought to be close collaboration in the areas of method and tool development.

Experiencing Safety Function Testing

Abstract: The two systems, lane change warning and side collision warning, support the driver in the safe performance of overtaking manoeuvres. For this purpose, the lane change warning captures other road users that are present in or approaching the lateral or rear section of the vehicle. If another vehicle is detected, the driver is warned via a lit warning symbol that appears in the wing mirror. Should the driver indicate the intention to overtake by activating the directional indicator despite this warning, it is intensified: The warning symbol begins to flash and the steering wheel vibrates, bringing the imminent side collision distinctly to the driver’s attention. If the driver continues to ignore the warnings and steers in the direction of the second vehicle, coming dangerously close, the side collision warning is activated. It correctively steers the vehicle obviously but always controllably in the opposite direction. The dangerous situation is thus defused, FIGURE 1.

Electrohydraulic rear axle steering systems for agricultural vehicles

Abstract: The Lindner Tractor Factory produces small standard tractors from the type Lintrac 90 among other things. The main application areas of this tractor are the steep mountainand meadowlands in Austria, Switzerland, Southern Germany and Slovenia. Steep slopes, obstacles such as trees and rocks, as well as narrow roads through villages and towns are part of the daily work of the farmer there. The tractor can optionally be equipped with the rear axle steering Ehla Plus from Mobil Elektronik besides its comparably manageable total length of 3.5 m. 90 % of all customers choose this option. The front axle has a full steering angle of 52°. Hereby a turning circle diameter of 9.5 m is already achieved. With a rear axle steering angle of up to 20° this turning circle can be reduced to less than 7 m, FIGURE 1. This provides a highly manoeuvrability for the anyhow compact vehicle. When turning on the field the small turning circle reduces crop damage. Apart from that the field can be continuously used, FIGURE 2. A further advantage of the electrohydraulic rear axle steering is the easy parameter definition. Thereby, individual steering programs can be defined for the vehicle and used via the control panel. The switching between on-road mode and off-road mode is done via program selection. In addition to the steering programs the rear axle can also be adjusted manually via the control panel. In the following some steering programs are exemplary listed. – Manual steering: To prevent the drifting away of the rear of the tractor when driving parallel on a slope, the rear axle AUTHORS

Testing with Virtual Prototype Vehicles on the Test Bench

Abstract: Dipl.-Ing. Christian Lensch-Franzen is Head of Engineering at APL Automobil-Prüftechnik Landau GmbH in Landau (Germany). Dipl.-Ing. Michael Friedmann is Project Engineer in the Basic Development/Research Team in the Engineering Department at APL Automobil-Prüftechnik Landau GmbH in Landau (Germany). Dr.-Ing. Christian Donn is Manager Business Development at IPG Automotive in Karlsruhe (Germany). Dipl.-Ing. Christian Rohrpasser is Engineer for Test Systems and Engineering at IPG Automotive in Karlsruhe (Germany). Real Driving Emissions

ORC Turbine-Generator Unit for Truck Applications

Abstract: Modern internal combustion engines already utilise a large amount of exhaust gas thermal energy using turbocharger turbines and exhaust gas aftertreatment systems. Nevertheless, a large amount of thermal energy remains unused in the exhaust gas. In order to increase the waste heat recovery, an organic rankine cycle process can be used. The overall efficiency of such a process mainly depends on the efficiency of the expansion machine. For such an application, a single stage, partial admission supersonic axial impulse turbine is designed and manufactured at the Leibniz Universität Hannover.

Mechatronic Roll Control for the 48-V Electrical System

Abstract: For the last few years, there has been an increasing trend in the availability of Sport Utility Vehicles (SUV) to automobile buyers. These passenger cars provide the purchaser with a combination of qualities such as power, size and offroad driving as well as comfort. The trend is so clear that even the premium automobile manufacturers have ventured into this market segment. And with success, as the sales figures show [1]. The aim of Schaeffler’s mechatronic Active Roll Control (eARC), as will be shown in this article, is to improve driving comfort whilst simultaneously increasing vehicle dynamics and safety. Even – or exact – in the rapidly growing SUV segment. AUTHORS