This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
An Effective Way To Measure Manual Gearbox Synchroniser Performance
Technical Paper
2015-01-2784
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Improved economic growth and infrastructure in India has led to new market trends for commercial vehicles. Customers now expect high levels of comfort from all tactile points in a truck cabin; among them the gearlever knob is frequently used and its reactions greatly influence how a driver perceives gearshift quality (GSQ) and thereby vehicle quality. The importance of the gear shift quality of manual transmissions has increased significantly over the past few years as the refinement of other vehicle systems has increased. In Gearbox, synchroniser is the major component whose performance will affect the peak engagement force to a large extent. Synchroniser mechanism allows gear change to be smooth, noiseless and without vibrations. Since the maximum synchronisation effort vary depending on the rate of the shift actuation, it is difficult to compare synchronisers in different transmissions by force alone. Hence there is a need for an objective metric other than synchroniser force by which synchroniser performance can be effectively measured. This paper explains a methodology by which synchroniser performance of different transmissions can be effectively evaluated, compared objectively and correlated to subjective feel.
Authors
Topic
Citation
Alaguvel, A. and Chekuri, V., "An Effective Way To Measure Manual Gearbox Synchroniser Performance," SAE Technical Paper 2015-01-2784, 2015, https://doi.org/10.4271/2015-01-2784.Also In
References
- Santosh , R. and Chekuri , V. Development of an Objective Methodology for Assessment of Commercial Vehicle Gearshift Quality SAE Technical Paper 2014-01-0182 2014 10.4271/2014-01-0182
- Szadkowski , A. Shiftability and Shift Quality Issues in Clutch-Transmission Systems SAE Technical Paper 912697 1991 10.4271/912697
- Szadkowski , A. and McNerney , G. Engineering Method for Rating Shift Quality SAE Technical Paper 932996 1993 10.4271/932996
- Moir G B An Investigation into Objective Measures of Gear-shift Quality Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 1995 209 273
- Harald Naunheimer , Bernd Bertsche Automotive Transmissions