Case Study – Hybrid Powertrain System Development

Abstract

This case study describes the development of a hybrid electric vehicle (HEV) powertrain for series production. It includes both the concept phase and the series development phase and focusses on the systems engineering approach used in the project. The design, requirement elicitation, and integration of powertrain elements is covered in detail, along with the testing of the complete powertrain. The development of the powertrain elements themselves is not a part of this case study. One of the key elements in this case study is modeling in the form of SysML and system models. These models are present in all stages of the development process from system design, requirements engineering, powertrain system specification to verification and validation (V&V). A second key element described in this case study is functional development, i.e., the consideration of the functions provided jointly by software, electric/electronic (E/E) hardware, and mechanical hardware concluding with functional powertrain testing. Functional safety development according to the functional safety standard ISO 26262 for road vehicles is essential for such complex mechatronic systems as the HEV powertrain considered in this chapter and is closely interwoven with the systems engineering approach.