DYNAMIC TESTING OF INTERNAL COMBUSTION ENGINES
Abstract
The automated testing of internal combustion engines is a field
of considerable importance. This thesis describes a novel area in
the form of dynamic testing. The investigation represents an original
approach to the problem with which the author believes he has developed
a new concept in engine testing.
The resulting information, combined with an appreciation of the
latest developments in automation equipment technology, has lead to a
review of the requirements of a generalised engine test system together
with an outline of the way in which it could be implemented.
The automated engine test beds used during the work are described.
The conventional methods of testing internal combustion engines are reviewed
and a generalised approach to automating them proposed. This
then leads to the suggestion of a new method using dynamic testing techniques
specially evolved in the course of the work. On the basis of
this the implementation of a dynamic full-load power curve as a replacement
for its steady state equivalent was pursued.
The second major use of dynamic techniques is for exhaust emission
cycles. Both dynamic (USEPA Smoke Cycle) and steady-state (USEPA 13
Mode Cycle) cycles were performed. In the case of the former, outer
digital loop techniques were used to improve control response.
In performing the above work, use was made of both analog and
digital simulation techniques for development purposes. This work was
also extended by the development of a simulation of a material handling
system to enable the control and optimisation of a production test
facility to be studied. The testing methods associated with automated
fault diagnosis are also analysed.
On the basis of the above work an engine test system task analysis
was generated and this new concept used to plan a microprocessor
based engine test automation scheme.
Authors
Hislop, Edwin WilliamCollections
- Theses [4223]