Characteristic Map Thermostat: Notes

The characteristic map thermostat is attached to the housing of the coolant pump.

The coolant temperature influences:

• Fuel consumption
• Power
• Factor of quality of the mixture formation
• Pollutant emission
• Mechanical load on the components

The optimization of these variables does not permit a fixed temperature value if there are different speed and load states. The optimization requires a temperature range that corresponds to each operating point. The characteristic map thermostat achieves an approximation of the optimal temperature.