Detent Profile Optimization to Improve Shift Quality of Manual Transmissions

Paper #:
  • 2015-01-1135

Published:
  • 2015-04-14
DOI:
  • 10.4271/2015-01-1135
Citation:
Siriyapuraju, K., Konduru, V., and Eswaramoorthy, P., "Detent Profile Optimization to Improve Shift Quality of Manual Transmissions," SAE Technical Paper 2015-01-1135, 2015, doi:10.4271/2015-01-1135.
Pages:
4
Abstract:
The customer of today is sensitive towards shift quality. The demand is for a crisp and precise gear shift with low shift effort. The impulses from synchronizers make shifts feel notchy. After synchronization the blocker ring releases the sleeve. The sleeve then hits the teeth of the clutch body ring. The second impulse causes a phenomenon called double bump. This can be felt at the hand and makes a shift feel notchy or sluggish. An ideal way to overcome this is to optimize the detent profile.This paper explains in detail the various factors that contribute to the perceived shift feel. Various methods to optimize the forces on the knob by changing the detent profile are discussed. Gear Shift Quality Assessment (referred as GSQA henceforth) is a tool to acquire the required shift feel data. Using this tool shift efforts and kinematics of a 5 speed manual transmission are plotted for illustration. The calculations required to optimize the detent profile are explained in detail. The necessary precautions to be taken are also discussed.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Technical Paper / Journal Article
1965-02-01
Technical Paper / Journal Article
1968-02-01
Technical Paper / Journal Article
1975-02-01
Technical Paper / Journal Article
1965-02-01
Article
2016-07-01