Model Based Evaluation of Parallel Hybrid Concepts for a Scooter for Reduced Fuel Consumption and Emissions
2022-01-0808
03/29/2022
- Event
- Content
- IC engines are most efficient when they operate steadily in specific zones which cannot be attained in real driving conditions. Hybrids tackle this issue and improve drivetrain efficiency. Though they are used in cars and commercial vehicles they do not find application in small two wheelers especially scooters which constitute the majority of the market in several Asian Countries. The reasons are cost of implementation and need to have a suitable design. Integrating an electric motor with a conventional scooter drivetrain while retaining the base engine and the CVT is a cost effective proposition which is the motivation behind this work. Such a development will need accounting for the behavior of the belt driven CVT. In this paper a comparison between two parallel hybrid layouts has been made with the base 110cc scooter powertrain. A map based engine model and a physics based CVT model were developed and validated to simulate the base drive-train on the WMTC drive-cycle. A rule based hybrid controller and a map based motor model were built and integrated to develop two hybrid powertrain models using the base engine. Simulations were performed for different locations of the motor i.e. before or after the CVT since this has a significant effect on its performance. Comparisons of the drive-trains based on results of NOx, CO and HC and fuel consumption will be presented and discussed in the final paper. Results show that an improvement of more than 20% in fuel consumption is possible with these hybrid drive trains.
- Citation
- Mathivanan, A., Elango, P., Kakani, R., Das, H. et al., "Model Based Evaluation of Parallel Hybrid Concepts for a Scooter for Reduced Fuel Consumption and Emissions," SAE Technical Paper 2022-01-0808, 2022, .