AFR Adaptation Strategy Based on Lambda Sensor for a Methanol Engine

2025-01-7039

01/31/2025

Features
Event
SAE 2024 Vehicle Powertrain Diversification Technology Forum
Authors Abstract
Content
Methanol is an main type clean energy and it taken important part for the future internal combustion engine technology. The Equivalent air-fuel ratio (AFR) is very import for the engine combustion of methanol. And a lot of case the ratio between methanol and gasoline is not the constant number. There are no studies about AFR when fuel ratio is arbitrary in the currently. The AFR changes obviously if the tank was fueled with gasoline by mistake at a methanol spark ignition engine. Emission will be affected heavily at this situation because the AFR of gasoline is 2 times more than methanol. Some fuel trim adaptation error will be detected by engine controller or even the engine will stall if engine controller keep use the previous AFR to do the fuel injection control. The Investigation provide a relevant AFR adaption strategy based on lambda sensor and the fuel pipes configuration. The strategy was proved valid by some simulation cases to reduce lambda disturbance, optimize emission property and increase driving safety.
Meta TagsDetails
DOI
https://doi.org/10.4271/2025-01-7039
Pages
7
Citation
Liu, Y., Zhong, J., Qian, P., Qiao, Z. et al., "AFR Adaptation Strategy Based on Lambda Sensor for a Methanol Engine," SAE Technical Paper 2025-01-7039, 2025, https://doi.org/10.4271/2025-01-7039.
Additional Details
Publisher
Published
Jan 31
Product Code
2025-01-7039
Content Type
Technical Paper
Language
English