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2008 Issues Archive
26 November 2008
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Ricardo’s real-time simulation highlights engine faults
Automotive firm Ricardo has launched Wave-RT, the first version of its engine simulation software specifically designed to enable real-time simulation to become an embedded part of the engine management system development process.
Featuring wave propagation effects, the transient response of the model is much closer to that of the real engine than would be the case with mean-value engine models more typically for this application.
Wave-RT thus enables validation of strategies to perform close control of engine performance during transients.
The accuracy of its airflow simulation allows development of concepts such as variable valve timing and lift control including more unusual examples such as negative overlap for controlled auto-ignition or for camless engine control.
As individual cylinders are separately represented it also enables the development and validation of complex control strategies such as closed-loop combustion control.
Because the Wave-RT model is automatically generated from an existing high-resolution Wave engine model, there is little calibration needed to produce the real-time model. The physical nature of the model means that engine faults are immediately transparent.
The overriding benefit is the automatic conversion from a Wave model to real-time format using WaveBuild. This is quicker and more repeatable than creating a large multi-dimensional map or any other interpretive process.
The speed of model generation also enables the development of control strategies to begin at a much earlier stage in an engine development programme and protects against delays arising due to design changes.
© PE Publishing, 26 November 2008
