This paper presents an overview of the design and development of a range extender engine. Key attributes for the engine have been identified, these being minimum package volume, low weight, low cost, and good NVH. A description of the selection process for identifying the appropriate engine technology to satisfy these attributes is given. The resulting design is briefly outlined and the development and optimisation of the engine to meet its performance targets is described, along with a presentation of the resulting performance achieved. Finally, an assessment of the achievable CO_2 emissions level is made, based upon real world usage patterns.
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