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INTRODUCING THE MDS 4000 - JAQUETÂ’S NEW ENGINE DIAGNOSTIC SYSTEM
Equivalent circuit models of the performance of internal combustion engines have been known for some time. The availability of economic high-speed computing components and associated precision sensors now make it possible to apply these models to real time measurements and engine diagnostics.
An engine consists of mechanical components that are in linear and rotational movement, influenced by compression and combustion cycles. This results in the irregular rotation of the crankshaft during each cycle.
It has been demonstrated that the measurement of crankshaft acceleration provides accurate information on both instantaneous and average indicated torque.
Indicated pressure i.e. the pressure developed in a cylinder as a result of the combustion process, is recognized as a fundamental measure of engine performance. Pressure sensors can be installed in each cylinder but these are expensive and in large multi-cylinder engines ( > 6 ) the wiring and associated monitoring electronics also become a significant factor.
Indicated torque and indicated pressure are related by the geometry of the engine and the angular crankshaft position. With knowledge of the engine geometry, the indicated pressure can be calculated from the indicated torque, thus doing away with the need for multiple pressure sensors for engine testing and diagnostics.
The principle of operation of the MDS 4000 is in part derived from an equation that relates an engine's dynamic and static torque elements as well as the linearity of this function. Ask for more information by using our Contact Form.
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