Composing architecture of parallel shaft transmission system in car with novel shifting strategy for effort reduction augmenting ecodesign

This article proposes a new gear-shifting strategy augmenting ecodesign, comprising its two pertinent attributes concerning fuel consumption and greenhouse gas emission in the passenger car. The strategy is germane to the gear clusters enabling the merger of gear ratios followed by devising compatible parallel shaft gearbox architectures, obtained via spatial modification of an orthodox dual clutch transmission (DCT). Gearbox configurations derived based on spatial rearrangement of gears, and to assay the working of proposed shifting strategy two architectures are considered; one with three clutches, introduced as multi-clutch transmission system (MCTS) and the other embodying two clutch arrangement and referred as modified dual clutch transmission (MDCT). Modified gearshifting sequences and algorithms are designed to ameliorate the problem of frequent gear-shifting in manual transmission. Full factorial design is utilised to synthesise configurations and, further, simulated in MATLAB Simulink and ADAMS environment to demonstrate the behaviour of proposed configurations in standard HWFET cycle.