Hybrid Power Classes
Full hybrid systems have the largest savings potential. Taking the lower purchasing cost as a calculation basis, however, the savings of micro and mild hybrid versions can also pay off for drivers or fleet owners.
| Micro hybrid | Mild hybrid | Full hybrid, parallel |
Full hybrid, serial |
|
|---|---|---|---|---|
| Installed electric power | 3-5 kW | 4-20 kW | 30-120 kW | 60-400 kW* |
| Voltage | 14-42 V | more then42 V | 144-600 V | 144-600 V |
| Fuel consumption reduced by | 3-5 % | approx. 15 % | 15-30 % | 15-30 % |
| Stop/Start/Generator function | + | + | + | + |
| Recuperation | Partly | + | + | + |
| Boost mode | + | + | + | |
| Electric starting | + | + | ||
| Purely electric driving | + | + |
*in the case of two driven axles
Stop/Start/Generator function
The engine is switched off during standstill. When starting, the electric motor automatically starts the engine again. Depending on the architecture, this is also possible while driving (coasting). As a generator, the electric motor can transform engine power into electric energy, which is made available to the main power system or routed to the battery.
Recuperation
The energy which is generated during braking and overrun mode is converted into electric energy and transferred to the hybrid battery. This leads to lower fuel consumption, especially during frequent braking procedures in city or suburban traffic.
Boost mode
The electric motor assists the engine when accelerating. Since the electric motor generates high torques already at low speeds, this means: dynamics, right from the first second. The additional propulsive power from the electric motor enables the engine to be designed in a smaller, lighter, and more fuel-saving way (downsizing).
Electric starting
For the particularly fuel-intensive starting process, it is exclusively the electric motor which provides propulsion. The combustion engine will be activated once a speed in the optimum fuel consumption range is attained or once the driver requests more power.
Purely electric driving
The vehicle also runs for a longer distance with the power supplied only by the electric motor. The required energy is provided by the battery.
Further information
Contact
Holger Kirsch
Trade Press Passenger Cars
Tel. +49 7541 77-2488
Fax. +49 7541 77-90 2488
E-mail:
holger.kirsch@zf.com
Annika Dingler
Trade Press Commercial Vehicles
Tel. +49 7541 77-7767
Fax. +49 7541 77-90 7767
E-mail:
annika.dingler@zf.com
