Driving dynamic investigations for the estimation of possible braking energy recovery of passenger cars in Germany

Abstract

Road traffic represents an important source of air quality problems, particularly in urban areas. Hence,
innovative drive solutions as the electrification of the vehicle drive train are of emerging importance as electricand
hybrid vehicles offer the possibility of local emission-free driving.
The recoverable braking energy profit depends crucially on the number and the characteristics of the braking
process which are characterized predominately by the driving behavior and the prevailing traffic situation. Only
such braking phases lead to high energy recovery, in which the deceleration process is attributable to the electric
machine. Based on a traffic situation- / braking phase analysis, it is estimated which traffic situations are
particularly suitable for possible energy recuperation and what share they have to total road traffic in Germany.
For this purpose, passenger cars traffic data from the transport emission model TREMOD is analyzed and
evaluated in terms of relevant dynamic parameters related to braking operations.