The Journal of Engine Research

The Journal of Engine Research

Fuel consumption-aware powertrain selection and optimization for a B-class sedan

Document Type : Original Article

Authors
Mohammad Javad Karamian Manesh 1
Isa Banagar 1
Zahra Molaei Raoof 1
Hamed Moqtaderi 2
1 Researcher of Engineering Dept., T-One Co., Bahman Group
2 Faculty of Mechanical Eng. Dept., Faculty of Engineering, Alzahra University
10.22034/er.2022.697925
Abstract
In current research we studied different powertrain options for a given B-class sedan vehicle in terms of fuel consumption target. The considered options include two engines and a base manual gearbox assuming the gear numbers and ratios can be changed. We concentrated on 5 and 6 speed gearboxes and used two parallel techniques to optimize gear ratios of the manual gearbox due to in-cycle fuel consumption which leaded to approximately the same results. To predict the fuel consumption in NEDC cycle, a longitudinal dynamic model of the vehicle was developed in GT-Suite environment. Two approaches by which we optimized the gear ratios were a direct optimizer based on genetic algorithm and a set of DOE analysis tools provided by GT-Suite software. The best result we got among all configurations was the combination of a 1500 cc turbocharged engine with a 5-speed manual gear box with optimized gear ratios based on DOE analysis technique. In this case we reached to 13.5% reduction in in-cycle fuel consumption.
 
Keywords
Gear ratio optimization
In-cycle fuel consumption
DOE analysis
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  • Receive Date 04 February 2022
  • Revise Date 19 May 2022
  • Accept Date 19 May 2022