There is always an interest in lowering the fuel consumption within the Automotive industry because of the competition when the fuel price increases. New cars are supposed to consume less fuel all the time. The requirements on the different systems are constantly increasing. All this is carefully followed up in the development projects off new car models. In this report a number of components in the AWD-system will be studied to see if there are any possible improvement potentials. The chosen components that will be studied are the propeller shaft, the joints and the bearings. The parts will be studied to see if they could be designed to be me more effective or if there are any better options on the market that are more energy saving.
Contents
1 Introduction
1.1 BACKGROUND
1.2 PURPOSE AND AIMS
1.2.1 Requirement specifications
1.2.2 Aims
1.2.3 Assignments
1.3 DELIMITATIONS
1.4 OUTLINE
2 Theoretical background
2.1 SHAFTS
2.2 JOINTS
2.2.1 Cardan joint (Hooke´s joint)
2.2.2 CV-joints (Constant velocity joints)
2.2.3 Other joints
2.3 LUBRICATION AND PERFORMANCE
2.4 NATURAL FREQUENCY ON ROTATING SHAFTS
2.5 POWER LOSSES DUE TO SPEED VARIATION ON A SHAFT
2.5.1 Calculations based on changes in kinetic energy
2.5.2 Calculations based on acceleration on the shaft
2.6 VECTOR CALCULATIONS
2.7 HOW 4-WHEEL DRIVE WORKS
2.8 SAAB XWD
3 Implementation
4 Results
5 Conclusions and discussions
6 References
7 Search words
8 Attachments
Author: Fredriksson, Robert,Trkulja, Milovan
Source: Jönköping University
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