Abstract
In the field of powertrain engineering, longstanding knowledge was gained for testing conventional vehicle powertrains. The hitherto used test strategies here were more focused on the subsystems of the powertrain than on the powertrain as an integrated system. Through the electrification of the powertrain, the topology and the range of functions have changed. This leads to new challenges for the validation and requires not only adjustments of the test strategies for electric vehicle powertrains but establish and develop integrative tests for the powertrain as an integrated system in order to meet the increased complexity. This paper presents a method to develop a holistic test strategy for a hybrid and electrical vehicle powertrain. In order to avoid misunderstandings of the used terms, it is necessary to create a standard understanding of them. Therefore, a nomenclature is defined and described. Furthermore, a definition of a holistic test strategy is provided. The focus of this present study is on the powertrain and not on its single subsystems. Subsequently, the four steps of the method are introduced and the current results are presented. Finally, a new developed test element within the holistic test strategy is introduced. The findings of this study support the integrative testing for powertrains.
Highlights
The validation branch of the v-model is of great importance as it significantly influences the time, cost and quality during the product development process
In the field of powertrain engineering, longstanding empirical knowledge has been gained for testing conventional vehicle powertrains
The answers to the core questions combined with continuous consideration during the product development process result in a holistic test strategy for a vehicle powertrain topology
Summary
The validation branch of the v-model is of great importance as it significantly influences the time, cost and quality during the product development process. In the field of powertrain engineering, longstanding empirical knowledge has been gained for testing conventional vehicle powertrains. Through the electrification of the powertrain, the topology, the range of functions and even the usage behavior have changed. The complexity of the powertrain system has increased, which must still be validated and tested regarding its functionality and durability. This has created new challenges for the validation, with adjustments required in the test strategies for the vehicle powertrains that have been used so far [1]
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