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Binz, Ralf
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Implementation of an Open-Loop Controller to Design the Longitudinal Vehicle Dynamics in Passenger Cars

Daimler AG-Christoph Andre Malonga Makosi, Ralf Binz, Frank Uphaus, Frank Kirschbaum
Technical University of Darmstadt-Stephan Rinderknecht
Published 2017-03-28 by SAE International in United States
In order to offer a wide range of driving experiences to their customers, original equipment manufacturers implement different driving programs. The driver is capable of manually switching between these programs which alter drivability parameters in the engine control unit. As a result, acceleration forces and gradients are modified, changing the perceived driving experience. Nowadays, drivability is calibrated iteratively through road testing. Hence, the resulting set of parameters incorporated within the engine control unit is strongly dependent on the individual sentiments and decisions of the test engineers.It is shown, that implementing a set of objective criteria offers a way to reduce the influences of personal preferences and sentiments in the drivability calibration process. In combination with the expertise of the test engineers, the desired vehicle behavior can be formalized into a transient set point sequence to give final shape to the acceleration behavior. To control the longitudinal dynamic of the vehicle in order to meet the customer expectations regarding to this set point sequence an open-loop controller is used.To alleviate comfort reducing drive train oscillations (non-linearities…
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Challenges for the Next Generation of BlueTEC Emission Technology

Daimler AG-Markus Paule, Alexander Mackensen, Ralf Binz, Christian Enderle
Published 2011-04-12 by SAE International in United States
Mercedes-Benz BlueTEC passenger cars have been on the cutting edge of clean diesel technology since 2006. These BlueTEC vehicles furthermore passed millions of kilometers in the hands of customers.SCR-equipped passenger cars already meet the most stringent exhaust emissions standards in international markets such as the USA, Europe and Japan. Diesel engines with BlueTEC technology also reduce CO₂ emissions and provide the high torque and performance associated with the diesel engine in addition to keeping exhaust emissions at the lowest possible level.Nowadays the requirements for SCR emission concepts are increasing continuously. In fact the emission legislation is getting stricter with the LEVIII emission standards in 2015. Additionally the requirements and effort for on-board diagnosis are increasing year after year. In combination with ambitious CO₂ targets all these issues constitute the further challenges of BlueTEC SCR emission concepts for worldwide markets.The following challenges are the focus of efforts to further advance the BlueTEC drives: - Reduce development and calibration effort, - Standardize and reduce the costs of SCR components, - Improve performance by further reducing exhaust emissions…
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