Gear Shift Efforts Analysis and User Interface Software Development

Year 2018, Volume: 4 Issue: 1, 53 - 59, 01.03.2018

Emrah Arslan , Ahmet Sagirli

Abstract

Nowadays, with the increasing demand of comfort on
passenger cars, many car manufacturer companies focus on manual transmission
and external control system. There are many gearshift control mechanisms available
such as rod mechanism, hydraulics mechanism and cable mechanism in the current
technics that need to be designed resplendently. In the meantime, base manual
transmission has a lot of components such as synchronizer, gear cones, friction
plates, poppet balls, hubs and rods which affect gear shift comfort. All these
main components should be designed and optimized for customer satisfaction. In
order to measure gear shift efforts and comfort, Gear Shift Quality Analysis
(GSQA) device is developed by Ricardo Company. Using this GSQA device, gear
shift force, gear shift integral, free plays, cross gate positions, fore-aft
positions, shifter angles are able to be measured objectively. To collect all
these attributes data, engineers should spend minimum one day on a selected
vehicle. This means loss of work and money for the car manufacturers. The gear
shift effort software (GSEA) for a manual transmission and external control
mechanism are developed to evaluate/calculate shift and select mechanical
ratio, cable strokes, length lever and shift force to provide desirable
shifting quality. In addition to software calculation, the vehicle is tested
using gear shift quality device. At the end of this study input parameters are discussed
in terms of outputs of vehicle shift quality attributes. The results of
simulation software are plotted to present easy understanding for the last
user.

Keywords

Synchronizer, shift quality, shift effort, external control

References

• S. Krishnan, Gear Shift Quality Benchmarking for Manual Transmissions, SAE Paper,India
• K.Park, S.Hongsuk and S.. Bonggyu, “Design Optimization of a Control System with a Variable Inertia Mechanism to Improve Shift Feeling in a Manual Transmission ”, SAEA-15AP-0020, October 2015.
• E. Luciano Duque and P.Thomaz Aquino Jr, “Human Factors analysis of manual gear shifting performance in passenger vehicles”, Science Direct, 6th International Conference on Applied Human Factors and Ergonomics (AHFE 2015) and the Affiliated Conferences, AHFE 2015
• A.Pastor Bedmar, “Synchronization processes and synchronizer mechanisms in manual transmissions”, Department of Applied Mechanics, Chalmers University of Technology, 2013
• D.Kelly and C.Kent “Gear Shift Quality Improvement in Manual Transmissions Using Dynamic Modelling”, FISITA World Automotive Congress, June, 2000.
• Khollam.S.C, Mhaske M S, Belkar S B “A Method to Optimize Brass Type Single Synchronizer Ring for Manual Gearbox” International Journal of Engineering and Advanced Technology (IJEAT) ISSN: 2249 – 8958, Volume-3, Issue-3, February, 2014
• https://automotive.ricardo.com/driveline-transmissions/benchmarking
• L.Lovas,D.Play1,J.Marialigeti, and J.F Rigal ”Mechanical behaviour simulation for synchromechmechanism improvements” Proc. IMechE Vol. 220 Part D: J. Automobile Engineering, 2006
• H.Naunheimer, B.Bertsche, J.Ryborz, W.Novak “Automotive Transmissions, Fundamentals, Selection, Design and Application” Second Edition 2010
• Nilesh A. Phalke, Dr. V. Singh “ Improvement in Gear Shift Performance of Manual Transmission System” International Journal of Science and Research (IJSR) ISSN (Online): 2319-7064, 2015