Analysis of Energy-Efficient Management of a Light-Duty Parallel-Hybrid Diesel Powertrain with a Belt Alternator Starter

Alessandro Ferrari; Edoardo Morra; Ezio Spessa; Claudio Ciaravino; Alberto Vassallo

doi:10.4271/2011-24-0080

The paper presents the main results of a study on the simulation of energy efficient management of on-board electric and thermal systems for a medium-size passenger vehicle featuring a parallel-hybrid diesel powertrain with a high-voltage belt alternator starter. A set of advanced technologies has been considered on the basis of very aggressive fuel economy targets: base-engine downsizing and friction reduction, combustion optimization, active thermal management, enhanced aftertreatment and downspeeding. Mild-hybridization has also been added with the goal of supporting the downsized/downspeeded engine performance, performing energy recuperation during coasting phases and enabling smooth stop/start and acceleration.

The simulation has implemented a dynamic response to the required velocity and manual gear shift profiles in order to reproduce real-driver behavior and has actuated an automatic power split between the Internal Combustion Engine (ICE) and the Electric Machine (EM). Typical parallel hybrid technology functions, such as Stop&Start, regenerative braking and power assistance from the EM have all been implemented in the GT-Drive model.

After model calibration and validation versus the available experimental data, the energy management strategies of such a hybrid configuration were investigated. The results obtained for the New European Driving Cycle (NEDC) and a Real Life Driving Cycle (RLDC) have been discussed, in terms of fuel economy and performance.

Standards

SAE Mobilus®

Publications

News

Events

Professional Development

A World in Motion (PreK-12)

Participate with SAE

SAE Membership

Donate

Analysis of Energy-Efficient Management of a Light-Duty Parallel-Hybrid Diesel Powertrain with a Belt Alternator Starter 2011-24-0080

SAE MOBILUS