Flow model inversion using a multi-dimensional search algorithm

A coolant control system comprising:

• a flow inversion module that:
• generates one of a plurality of zone flow requests for engine coolant based on a plurality of coolant temperature sensors, wherein each of the zone flow requests corresponds to a respective zone of a coolant system;
• generates, in response to receiving the plurality of zone flow requests for engine coolant, a first search zone;
• determines a plurality of key points for the first search zone;
• determines a unique combination of commands for each key point of the plurality of key points in the first search zone, wherein the unique combination of commands comprises an actuator command for each actuator of a plurality of actuators of the coolant system;
• determines a flowrate associated with each command for each key point of the plurality of key points;
• calculates a total cost for each key point of the plurality of key points in the first search zone, wherein the total cost is calculated using an absolute normalized error for each flowrate of each command for each key point of the plurality of key points in the first search zone;
• determines a first winning key point in the first search zone associated with a lowest total cost among the plurality of key points;
• and
• generates commands regarding the first wining key point;
• and
• a flow control module that controls the plurality of actuators based on the commands generated by the flow inversion module.