Heat Balancing

For the heat balance measurement at the internal combustion engine, the temperature of the coolant is acquired at the engine system interface for inlet and outlet as well as the mass flow. The same applies to the engine oil. Both liquids are conditioned and can now be varied as desired at every operating point. Determining the heat flow of both media requires an accuracy of measurement that goes beyond the regular extent. For this reason, specially developed measuring devices are employed to determine the temperature. For a complete balancing, the fuel consumption, exhaust-gas heat, effective performance and convection are determined.

Heat distribution at various coolant temperatures
Heat distribution at various coolant temperatures

The program maps created by stationary load points with variations of the coolant or oil temperature are the basis for dimensioning the cooling systems in which the engine is to be installed and for the simulation of any, even extreme driving conditions.


In combination with the engine process computation and the one-dimensional flow computation, models can be created that completely describe the thermal system of the engine. This renders the heat balance measurement an important tool for improving thermal management, minimizing friction and reducing fuel consumption.

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