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Title: Engine characterisation and control for vehicle applications
Author: Gill, Gurmail S.
ISNI:       0000 0001 3499 5040
Awarding Body: University of Warwick
Current Institution: University of Warwick
Date of Award: 1978
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The work described in this thesis is concerned with methods of reducing the fuel consumption and emissions of pollutants in automobile engines. Complex interrelationships between fuel economy and generation of pollutants by the conventional spark ignition engine, make it difficult to achieve significant improvements in both these requirements simultaneously. The alternatives to the spark ignition engine also display similar characteristics. Difficulties are aggravated by the insistence of vehicle owners upon retention or promotion of certain characteristics of the present vehicle. Furthermore, the acceptability of an alternative is also governed by the economic climate of the time. This thesis investigates an innovative concept of cylinder disabling as a means of improving the part-load efficiency of the conventional spark ignition engine. The concept utilizes the well developed technology of the spark ignition engine, therefore implementation can be considered within the available state of the art. The results of studies show that considerable improvements in part-load efficiency are possible. However, the practical problems associated with applications require further studies. The instrumentation and development of the test facilities necessary for the investigation of engine behaviour are described. A linearized small signal mathematical model of the test bed is developed. The test bed model Is used to apply some of the modem concepts in control theory to solve test bed control problems. As a result it has been shown that sophisticated controls are possible with simple practical realizations. A method is presented for the measurement of emissions under transient conditions with the available low bandwidth equipment. The transient behaviour of the engine is then investigated by considering the engine as a reactor system. The results of these studies and particularly the behaviour of emissions, is thought to be of significant Interest due to the pollutant generating processes involved and the consequences of the results on vehicle simulations.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: TD Environmental technology. Sanitary engineering ; TL Motor vehicles. Aeronautics. Astronautics