英语翻译V.CONCLUSIONS AND FUTURE RESEARCHDue to ever increasing

英语翻译
V.CONCLUSIONS AND FUTURE RESEARCH
Due to ever increasing requirements on fuel efficiency,
emissions and drivability,the complexity of powertrains is
expected to increase further in the future.In order to deal
with this complexity level,integrated powertrain control is
needed to ensure system robustness and reduce the required
development resources.
Integrated powertrain control also allows synergistic
optimization between powertrain sub-systems to meet future
performance requirements.The potential of synergy between
a diesel engine,hybrid driveline and DPF aftertreatment has
been examined.For this application,three cases have been
examined to determine the effects on a heavy-duty hybrid
distribution vehicle:
1.By using regenerative braking energy for electric DPF
heating,the fuel penalty associated with DPF
regeneration can be completely avoided when using an
18 kW heater.However,this would lead to excessive
battery throughput.Under realistic driving conditions,
this fuel penalty can be reduced by 18%.
2.By electric heating of the DOC only,the DPF
regeneration range can be extended down to engine idle
without other additional measures.An electrical power
of 1.9kW suffices,which is also within the capability of
conventional vehicles.
3.An idle-stop strategy prevents cool-down of a hot DPF,
especially after high load driving.Improvements of up
to 50°C have been shown.This can be advantageous to
reduce the energy required for regeneration and reduce
thermal cycling.
Further research is recommended into the effects of the
presented strategies on other hybrid functions,along with
demonstration of the combined effectiveness on actual
driving cycles.Other strategies representing even tighter
integration between powertrain systems should also beevaluated for potential.For Integrated Powertrain Control,
research will concentrate on the development of total energy
concepts and advanced emission management for diesel
engines with both an SCR and DPF system for emission
control and CO2 reduction.For this application,hybridassisted
thermal management is of special interest.