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and their evolution from diesel buses. Parts 3 and 4 consider battery electric buses and fuel
cell buses, respectively, whilst part 5 provides a comparison of these emerging technologies.
2. Diesel hybrid bus
2.1. Basic principles of diesel electric hybrid buses
The principle difference between diesel hybrid buses and diesel buses is the inclusion of an
electrical energy storage system in conjunction with an electrical motor/generator. The pri-
mary source of energy is still the diesel engine; however, the inclusion of the electrical sys-
tem provides a number of advantages such as facilitating regenerative braking and allowing
reduced idling time [17]. The utilisation of a hybrid system results in improvements fuel effi-
ciency and emissions, although these come at the price of additional cost and complexity [17].
The integration of the electrical energy system can be utilised through a number of configura-
tions, with the common options being the series, parallel and series-parallel hybrid configu-
rations, as shown in Figure 3. In a series hybrid drivetrain, the mechanical output from the
diesel engine is converted into electrical power via a generator when operating at its most
efficient loading. This is supplemented with a battery to provide for the electric drive motor
Figure 3. Schematic of the three available layouts for the propulsion system of a diesel/electric hybrid drive train.
Hybrid Electric
Vehicles36
zurück zum
Buch Hybrid Electric Vehicles"
Hybrid Electric Vehicles
- Titel
- Hybrid Electric Vehicles
- Autor
- Teresa Donateo
- Herausgeber
- InTech
- Ort
- Rijeka
- Datum
- 2017
- Sprache
- englisch
- Lizenz
- CC BY 4.0
- ISBN
- 978-953-51-3298-1
- Abmessungen
- 15.5 x 22.5 cm
- Seiten
- 162
- Schlagwörter
- Physical Sciences, Engineering and Technology, Engineering, Vehicle Engineering, Automobile Engineering
- Kategorie
- Technik