FME Transactions (Jan 2017)
The analysis of gear shift indicator test results
Abstract
The results of tests according to Regulation (EU) No 65/2012 regarding gear shift indicators on 59 different vehicles are analyzed. Primary parameters were the vehicle speeds at which the gear shift is indicated through gear shift indicator (GSI), and based on their deviation from standard gear shift points defined for type I emission tests in UNECE Regulation No 83, it is concluded that standard gear shift points need to be revised. Relative fuel savings when shifting according to GSI instructions compared to standard gear shift points were analyzed (average 5.2%, maximum 19.9%). It is also shown that automaatic transmission gave bigger fuel saving when manual mode is used according to GSI, compared to manual transmission, also used with GSI. It is concluded that statistical analysis on how drivers follow GSI instructions may be used to improve current test procedures for GSI efficiency, fuel consumption measurement and emission tests.
