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Car ingress and egress: verification and evaluation of dimensions relevant for ergonomic comfort
2002 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Ergonomics and comfort have become a more and more important mean for car competition. In this thesis the ingress and egress for the driver were investigated from an ergonomic perspective using experiments and a tool for evaluation of the comfort was developed. The opening and closing of the door was not considered. The pre-experiments were carried out with 14 test persons and five vehicles from the BMW-spectra and the main experiments with 10 test persons and a variable ergonomic model. In both cases half of the test persons consisted of short women and the other half of tall men. The evaluation was carried out using questionnaires and videotapes. Earlier research done shows that there are four different ingress strategies. The purpose of the pre-experiments was to investigate the differences for ingress and egress between different cars and different persons and also to identify all relevant dimensions. In the main experiments the four main dimensions were investigated. These are the height of the roof, the height of the seat, the height of the doorsill and the width of the doorsill. The acceptable limits for the dimensions and the relationship between them were analysed. The result of the pre-experiments showed that the test persons use the same ingress strategy in all cars. This strategy is adapted to the car that they normally drive. There were differences in the course of movements between fully opened doors and partly opened doors. Diagrams were generated based on the questionnaires, where the relationships between the value of the investigated dimensions and the ratings were linearly approximated. All dimensions relevant for ingress and egress were determined and a hypothesis for the relationships was compiled. The result of the main experiments showed a big spreading for maximum and minimum for the separate dimensions. However the relationship between the dimensions is similar for all test persons. Diagrams were made where the relationships between the dimensions were linearly approximated. Using the results from the pre-experiments and the main experiments an Excel- tool was developed, which will facilitate the evaluation of ingress and egress of new concepts. With this tool the five most important dimensions for the ingress and egress can be evaluated as well as the three most important relationships. The reliability of the experiments is limited due to the few test persons and the validation is difficult as comfort is a subjective experience hard to measure. The test persons have different frame of references and are influenced by their general opinion about the car. This was not an issue when using the variable ergonomic model.

Place, publisher, year, edition, pages
Keyword [en]
Technology, Ergonomics, Comfort, Ingress, Egress, Cardesign, Drivers, enviroment
Keyword [sv]
URN: urn:nbn:se:ltu:diva-58815ISRN: LTU-EX--02/083--SELocal ID: f6180eca-08fc-44ff-bb64-069bfc5b2e6dOAI: diva2:1032203
Subject / course
Student thesis, at least 30 credits
Educational program
Industrial Engineering and Ergonomics, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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