Off-Cycle Technology Evaluation for Engine Stop-Start

2016–2020 fuel economy regulation in China includes the off-cycle credit which is max. 0.5 L/100 km for single vehicle model and requires the off-cycle benefit must be demonstrated with “measurable” principle. Four methods with different levels of complexity are designed, due to the lack of mature test procedure in China. An internally developed cycle based on Shanghai driving condition is used as a reference cycle to validate the methodology. Off-cycle benefits are presented by GM simulation module with two types of vehicles. Four methods are proved to properly assess the off-cycle benefits and Advantages/Disadvantages are analysed.