Assessment of Fuel Consumption of Co-Optimizing Multi-mode Gasoline Compression Ignition in a Hybrid Electric Vehicle Platform
2022-01-0811
03/29/2022
- Event
- Content
- Increasing regulatory demand to reduce CO2 emissions has led to an industry focus on electrified vehicles while limiting the development of conventional internal combustion engine (ICE) and hybrid powertrains. Hybrid electric vehicle (HEV) powertrains rely on conventional SI mode ICEs that are optimized for a narrow operating range. Advanced combustion strategies such as Gasoline Compression Ignition (GCI) have been demonstrated by several others including the authors to improve brake thermal efficiency compared to both SI mode and Diesel CI modes.. Soot and NOx emissions are also reduced significantly by using gasoline instead of diesel in GCI engines due to differences in composition, fuel properties, and reactivity. In this work, an HEV system was proposed utilizing a multi-mode GCI based ICE combined with a HEV components (e-motor, battery, and invertor). To determine the total fuel consumption over the FTP75 drive cycle, a fueling map from a multi-mode GCI combustion presented in a previous study was used as the input data set for the 1D HEV drive cycle model (GT Drive) of a mid-sized SUV. An HEV operation strategy was proposed and followed by parametric studies of components including the e-motor sizing (20 kW to 80kW) and, the battery capacity (2Ah to 8Ah), and evaluation on their impacts on fuel consumption. Additionally, other common fuel economy improvement tactics were reviewed such as start-stop, regeneration, gear shift optimization and downsizing of the engine, to combine the effects of these tactics and optimize the HEV powertrain over FTP75 cycle. The overall fuel economy was improved by 58% over that of vehicles with conventional SI engine and achieved a cycle- based fuel economy of 48MPG.
- Citation
- Zoldak, P., Naber, J., Zyada, A., kumar, V. et al., "Assessment of Fuel Consumption of Co-Optimizing Multi-mode Gasoline Compression Ignition in a Hybrid Electric Vehicle Platform ," SAE Technical Paper 2022-01-0811, 2022, .