Steady State and Transient Control Through a Microprocessor-Electrohydraulic System of an Integrated Engine-Transmission Unit 830578

The paper describes the steps in the implementation of a self-optimising steady state micro-processor control system for the integrated truck engine transmission system known as the differential compound engine (DCE). References (1–5). Although the system in its present form is based on a small and slow microprocessor, the control strategy evolved is directly applicable to the faster system ultimately envisaged. The second part of the paper deals with the requirements for faster control of transients, with particular reference to operational safety requirements, such as limiting compressor speed and maximum cylinder pressure.It is considered that the unit forms the basis for advanced on- and off-highway vehicle power plant with uniquely attractive operating characteristics.


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