Powertrain Interface
From c,mm,n
The following text is the summary of a bachelor thesis by Gertjan Endeman. He wrote this in april 2007 in his study about the design of a user-interface of the powertrain at the University of Twente.
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Abstract
Future powertrain
In the project "Car of the Future“, two powertrain alternatives are developed. One is based on hydrogen powered fuel cells. This powertrain probably acts different compared to the powertrains of cars nowadays. Therefore, a user-interface has to be developed for this newpowertrain, in order to let the driver understand and accept it. In the new powertrain, the fuel cells produce electricity. Hydrogen is needed for this process. The electricityis used to power electro motors, whichdrive the wheels. These electromotors can also be used the other wayaround. When the motors are moved by something else, theygenerate electricity. This is called regenerative braking. Ultracapacitors are able to temporary assist the fuel cells in generating electricity. The capacitors are charged bythe fuel cells or byregenerative braking.
An analysis of several car technologies, which were introduced in the past, was used to point out the factors, which could affect the acceptance ofthe new powertrain. These factors turned out to be for example performance, image and emotion.
The factors which could affect the acceptance were applied to the new powertrain to find its qualities and shortcomings.
Design considerations
When designing a user-interface, many aspects have to be taken into account. First, there is the project "Car ofthe Future“. In this project the context, in which the car will be used and the system character of the car itself were stated. Second, all kinds of information systems and display technologies are available and added to the interior of the car nowadays. However, it is very important not to overload the driver of the car with too much information. Third, many design guidelines are available for in-vehicle information systems. They include guidelines about specifications of controls and how to present and prioritize information. Fourth, the position is an important aspect when designing user-interfaces for cars. These considerations, together with the obtained qualities and shortcomings, resulted in a list of functions and a list of requirements.
Design
The design of the user-interface consists of displays and controls. During an extended design process the primary display was developed. This display shows speed and energy consumption. Not all this information is displayed necessarily. The driver can choose whether to display the basic mode or the advanced mode. In basic mode, the speedometer and fuel gauge are displayed, and in advanced mode the energy consumption information is showed as well. The information is displayed very clear and effective, according to the requirements that were a result of the design considerations. The secondary display shows information on demand. This information is not necessary needed during a car drive. Therefore, it can be combined with other information systems like multimedia or trafficinformation.
Evaluation
A short evaluation was carried out. To check whether or not all the functions were fulfilled by the designed user-interface. This resulted in a list of recommendations and a final conclusion for the assignment.
