Straightforward Systematic Approach for Fuel Efficiency and Emissions Assessment in Automotive Systems

2011-36-0100

10/04/2011

Event
SAE Brasil 2011 Congress and Exhibit
Authors Abstract
Content
At this time, each major automotive market bares its own standards and test procedures to regulate the vehicle green house gases emissions and, thus, fuel consumption. Hence, much are the ways to evaluate the overall efficiency of motor vehicles. The majority of such standards rely on dynamometer cycle tests that appraise only the vehicle as a whole, but fail to assess emissions for each component or sub-system. Once the amount of work generated by the power source of an ICE vehicle to overcome the driving resistance forces is proportional to the energy contained in the required amount of fuel, the power path of the vehicle can be straightforwardly modeled as a set of mechanical systems, and each sub-system evaluated for its share on the total fuel consumption and green house gases emission. This procedure enables the estimation of efficiency gains on the system due to improvement of particular elements on the vehicle's driveline. In this work a simple systematic mechanical model of an arbitrary smallsized hatch back was assembled and total required energy calculated for different regulatory cycles. All the modeling details of the energy balance throughout the system are presented. Afterward, each subsystem was investigated for its role on the fuel consumption and the generated emission quantified. Furthermore, the application of the modeling technique for different sets of sub-systems was introduced.
Meta TagsDetails
DOI
https://doi.org/10.4271/2011-36-0100
Pages
11
Citation
Nonato, F., and Macedo, G., "Straightforward Systematic Approach for Fuel Efficiency and Emissions Assessment in Automotive Systems," SAE Technical Paper 2011-36-0100, 2011, https://doi.org/10.4271/2011-36-0100.
Additional Details
Publisher
Published
Oct 4, 2011
Product Code
2011-36-0100
Content Type
Technical Paper
Language
English