Optimizing Fuel Consumption and Pollutant Emissions of a Spark Ignition Engine for Eco-Driving Applications

Abstract

The transportation sector is a major contributor to both air pollution and greenhouse gas emissions. While optimizing fuel consumption reduces CO2 emissions, it can increase fuel-rich operation and cause higher HC and CO emissions. A simplified emissions model is thus introduced in order to account for the impact of air/fuel ratio on both the exhaust concentration of regulated pollutants and the catalyst efficiency. This model is used to solve the eco-driving problem with dynamic programming and a weighted objective function. An emission-centered and a consumption-centered scenario are compared on various driving cycles and with several time constraints. The optimal driving style in terms of emissions shows a substantial decrease in CO and HC while consumption stays relatively stable and NOx emissions slightly increase.

Modelling of single and multi-port manifolds and studying the influence of structural and thermal behaviour on exhaust manifolds used in automotive applications

“…The exhaust manifold plays an important role in receiving the exhaust gases from the combustion chamber and letting them out into the atmosphere and hence has an impact on the performance of an engine system. The emission and fuel consumption efficiencies are closely related to the exhaust manifold [4,5].…”