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ITEM |
: |
HYDRAULIC ENGINE
DYNAMOMETER |
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MODEL |
: |
ET-DHB-1 |
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100 KW HYDRAULIC
DYNAMOMETER |
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ET-DHB-2 |
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150 KW
HYDRAULIC DYNAMOMETER |
These Hydraulic Dynamometers are part of our Modular
Dynamometer System (MDS), which is designed to operate with our Engine Test Beds
(EP-TBL & ED-TBL). It offers a good solution to the problem
of testing a variety of engines in a school shop as the system is able to
quickly connect to our engine test beds. This enables the
teaching program to have one dynamometer and any number of engine test beds with
various models of petrol or diesel engines. The unit comes
ready to test engine power with instruments for speed and torque.
Many additional testing capabilities may be added by using our MDS
optional equipment, which enhances the system for thermodynamic testing as
well.
This product was designed to meet the needs of
engine power testing for schools at an economical cost.
Power testing is an extremely important element in the training of an engine
technician. The use of this dynamometer system allows the
student to manipulate the settings on an engine (i.e. timing, fuel mixture,
valves, etc.) and observe the effects in the power output of the engine.
These activities provide feedback to the student so as to improve his
skills in performance tuning and engine rebuilding. The
courseware provided is very comprehensive and covers many aspects of performance
tuning and the traditional experiments in engine thermodynamics as well.
General Specification:
The basic unit consists of a hydraulic dynamometer
assembly, which is mounted, in a moveable unit that contains the hydraulic fluid
reservoir. The dynamometer is a power absorption type, which
utilizes hydraulic fluid to absorb the engine power. It is
designed to be quickly connected to the Labtech Engine Test Stands which can
accommodate a wide variety of petrol and diesel engines.
The unit comes with instrumentation to allow power
testing of engines. This includes a calibrated torque meter
for measuring force and RPM meter for measuring engine rotational speed.
From these two instruments the horsepower and kilowatt rating of the
engine can be calculated. In addition, power and torque
curves can be plotted to investigate engine performance.
The load control enables a variable load to be
applied the result of which is directly indicated on the torque meter.
It is important to note that hydraulic dynamometers have an important
advantage over other types of dynamometers (such as electrical A/C and D/C
machines) in that it is capable of developing full torque down to zero speed.
As with all hydraulic dynamometers, the power of the
engine is absorbed by the dynamometer and transferred to the oil in the form of
heat. The large 220 liters oil reservoir allows for testing
to be done for approximately 45 minutes to 1 hour (under variable load) without
utilizing the external oil cooling heat exchanger system.
This allows for about 3 or 4 engines to be power tested (and average of 15
minutes testing each). This is sufficient for most school
shop periods. However, for longer testing an external
special heat exchanger which cools the hydraulic oil can be connected.
This permits the testing period to be extended for a much longer period
and allows it to be used all day long for set-up and testing of a variety of
engines within the shop.
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