Die Sonderausgabe der MTZ hier herunterladen (6 MB - MS Motor ...

ELECTRIFICATION
POWERS PUMP INNOVATION
Pierburg Pump Technology (PPT) is a globally acknowledged specialist in innovative and futuristic pump technology.
The product portfolio comprises mechanical and electric coolant, oil and vacuum pumps as well as water
circulation pumps for cars and commercial vehicles. The globally oriented company has been a market-leading
producer of pumps for internal combustion engines for many years and has always been a pioneer of novel
technical developments and innovations.
TECHNOLOGICAL TRENDS
IN PUMP DESIGN
The rapidly growing requirements in engine
development in terms of fuel consumption
and emission values call not only
for the optimization of the engine’s energy
balance but also a reduction in the
power consumption of the accessories.
For the development of new pumps this
means, along with a sustained optimization
of efficiency, the consistent exploitation
of further potential for savings such
as pump variability, i.e., the adaptation of
pump output to the requirements of the
particular operating point.
PPT identified this trend years ago and
has pushed ahead with the development
of electric coolant pumps and variable
mechanical water and oil pumps. In the
meantime, such products are already in,
or on the verge of, mass production at a
variety of OEM of cars and commercial
vehicles.
Current development work is concerned
with further improvements in the variability
of mechanical water pumps, be they
simple On/Off or fully variable pumps
with throttle control. In the field of variable
mechanical oil pumps, improved
characteristic-driven control systems help
to exploit extra conservation potential by
using electrified actuators. In view of the
drive concepts of the future such as hybrid,
electric and fuel-cell vehicles, PPT is
also advancing the development of electric
vacuum pumps and electric oil
pumps, the latter to extend the functionality
of new transmission strategies.
100 Years of Kolbenschmidt Pierburg
MECHANICAL COOLANT PUMPS
The focus in the development of coolant
pumps was for a long time on improving
efficiency and durability and reducing
noise emissions. In essence, pump design
remained unchanged throughout this period.
However, increasingly tough requirements
in terms of fuel economy and emission
reduction over the last few years
have made the introduction of flexible
systems imperative and are thus encouraging
a fundamental rethink in pump development.
The optimization of the cold
starting of the internal combustion engine
and the reduction in pump power consumption
are the key reasons for developing
coolant pumps with greater flexibility.
In the first few minutes after cold starting,
the pump should not cool the internal
combustion engine, as exhaust gas emissions
can be reduced by shortening the
engine’s warm-up phase. This functionality
can be achieved with the aid of an On/
Off coolant pump. Moreover, the hydraulics
of the coolant pump is designed for
the engine’s least favorable thermal loading.
As a consequence of this design requirement
and the fixed transmission ratio
between the engine and pump, the engine
is oversupplied with coolant at most
operating points. A better adaptation of
cooling performance to the needs of the
engine can be achieved with both continuous
and discrete adjustment mechanisms.
In both cases, pump variability is
realized with an electric actuator. Fail-safe
operation must be ensured here, i.e. in the
event of a failure of the control unit, the
PUMPS
AUTHORS
DIPL.-ING. ACHIM BRÖMMEL
is Vice President Engineering and
Manufacturing Process at Pierburg
Pump Technology in Neuss
(Germany).
DIPL.-ING. MICHAEL ROMBACH
is Senior Manager Product
Engineering Vacuum Pumps at
Pierburg Pump Technology in Neuss
(Germany).
DR.-ING. BERND WICKERATH
is Technical Expert Fluid Dynamics
at Pierburg Pump Technology in
Neuss (Germany).
DIPL.-ING. THOMAS WIENECKE
is Senior Manager Product
Engineering Electric Water Pumps at
Pierburg Pump Technology in Neuss
(Germany).
DIPL.-ING. JEAN-MICHEL DURAND
is Senior Manager Product
Engineering Mechanical Water
Pumps at Pierburg Pump
Technology in Thionville (France).
DIPL.-ING. GIACOMO ARMENIO
is Senior Manager Product Engineering
Oil Pumps at Pierburg Pump
Technology in Livorno (Italy).
DIPL.-ING. PH.D. RAFFAELE SQUARCINI
is Group Manager Calculation
and Simulation at Pierburg Pump
Technology in Livorno (Italy).
DIPL.-ING. THOMAS JOACHIM GIBAT
is Senior Manager Electronics
within Central Engineering
of Kolbenschmidt Pierburg AG
in Neuss (Germany)
89