Dedicated auxiliary power units for Hybrid Electric Vehicles
conference paper
The use of a dedicated auxiliary power unit is essential to utilize the potential that hybrid vehicles offer for efficient and ultra-clean transportation. An example of a hybrid project at the TNO Road-Vehicles Research Institute shows the development and the results of a dedicated auxiliary power unit for a series hybrid powertrain. This auxiliary power unit consists of a direct injected turbodiesel engine and a permanent magnet generator. This APU achieves not only extremely high efficiency, but thanks to a special aftertreatment system (particulate trap and Denox catalyst) also very low emissions. During the design and development of the APU, attention is given to the following aspects: the choice of the operating points, the interaction between duty cycles and conversion rate of the aftertreatment system, the genset controller and the hybrid controller. Based on a reference power input signal, the genset controller has to ensure a stable power delivery during varying external circumstances. The hybrid controller and its incorporated power control strategy, affects driveability aspects (like performance, range, safety reserve), efficiency, emissions, life, the temperature range for aftertreatment conversion, noise and various other aspects, thus being of prime importance for the succesful use of a series hybrid powertrain.
TNO Identifier
362429
Source title
EVS-15 Conference, 1-3 October, 1998, Brussels, Belgium
Collation
9 p.
Files
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