Investigation of the Impact of Lean Mixtures on the Performance of GDI Engines

2016-36-0326

10/25/2016

Event
25th SAE BRASIL International Congress and Display
Authors Abstract
Content
The demand for more efficient vehicles is growing worldwide. A promising technology is the engine downsizing plus turbocharging applied to gasoline direct injection, GDI, engines. In parallel with this technology, the use of lean mixtures on engines can be an extra opportunity to reduce fuel consumption. An experimental investigation was performed on an engine dynamometer to study the impacts of lean mixtures on the performance of a GDI engine. It was used a GDI 1.4L with turbo engine with a programmable engine control unit (ECU) to optimize the calibration for different air fuel ratios. The Engine was calibrated for maximum spark advance limited by knocking. Combustion duration, mass fraction burned and other combustion parameters were calculated based on in-cylinder pressure curve data. The combustion variability was analyzed from 900 recorded engine cycle for each operating condition. Results show that the use of lean mixtures can lead engines to improved efficiency.
Meta TagsDetails
DOI
https://doi.org/10.4271/2016-36-0326
Pages
6
Citation
Bontorin, A., and de Oliveira Carvalho, L., "Investigation of the Impact of Lean Mixtures on the Performance of GDI Engines," SAE Technical Paper 2016-36-0326, 2016, https://doi.org/10.4271/2016-36-0326.
Additional Details
Publisher
Published
Oct 25, 2016
Product Code
2016-36-0326
Content Type
Technical Paper
Language
English