The parallel hybrid electric vehicle (PHEV) employs an additional power source (electric motogenerator) in combination with the conventional diesel engine. This architecture exploits the benefits of both power sources in order to reduce the fuel consumption, increase the overall power, and above all, decrease CO2 emissions. Moreover, the emissions reduction target is lead by EU Regulations and local initiatives for traffic limitations, but the real drivers for the growth in the market are demonstrable fuel economy improvements and productivity costs optimization (global efficiency). This paper presents the results achieved by Iveco in the development and testing of parallel hybrid systems applied to medium range commercial vehicles, with the intent to evaluate the functionality, driveability performance and leading the best reduction in terms of fuel consumption and emissions in different real-world missions. The system architecture foresees one electric motor/generator and a single clutch unit. An external electrical power source for the battery recharging It is not necessary. The chosen configuration allows to implement the following functional modes: Stop & Start with Electric Launch; Hybrid Mode; Regenerative Braking Mode; Inertial Start and Creeping Mode. The software contained in the supervisor control unit has been tuned to the customer specific missions, taking in account on road data acquisition in order to demonstrate the reliability, driveability and the overall efficiency of the hybrid system. The field tests carried out in collaboration with different end users (Iveco key customers) have been an important opportunity to reach the project goals in a short time and to collect many operational and functional impressions directly from customers. The results achieved during the performance testing are in line with the project expectations, especially in term of fuel consumption and driveability feeling. The vehicle measurements show an improvement of 20% less (average) in fuel consumption in different delivery mission and context of use in comparison with a baseline Eurocargo truck.
Benefits of a parallel hybrid electric architecture on medium commercial vehicles
2009
12 Seiten, 12 Bilder, 6 Quellen
Aufsatz (Konferenz)
Englisch
Benefits of a parallel hybrid electric architecture on medium commercial vehicles
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