System And Method For Controlling Inlet Coolant Temperature Of An Internal Combustion Engine

摘要

A system including a target module determining a target temperature of coolant at an input of an engine for a maximum amount of fuel efficiency. A mode module disables closed loop control based on temperatures of coolant entering the engine and at an output of a radiator. An open loop module determines first and second temperatures of coolant at inputs of a coolant control valve that receive coolant from the radiator and a channel that bypasses the radiator. A ratio module determines a ratio based on the first and second temperatures and the temperatures of the coolant entering the engine and at the radiator output. A closed loop module generates a correction value based on the target temperature and the temperature of the coolant entering the engine. A position module adjusts the coolant control valve based on the ratio, the correction value and whether closed loop control is disabled.

主权项

1. A system comprising:
a target module configured to determine a target temperature of coolant at an input of an engine for a maximum amount of fuel efficiency; a mode module configured to disable closed loop control based on a temperature of coolant entering the engine and a temperature of coolant at an output of a radiator; an open loop module configured to determine (i) a first temperature of coolant at a first input of a coolant control valve, and (ii) a second temperature of coolant at a second input of the coolant control valve, wherein the first input receives coolant from the radiator, and wherein the second input receives coolant from a channel that bypasses the radiator; a ratio module configured to determine a ratio based on the temperature of the coolant entering the engine, the temperature of the coolant at the output of the radiator, the first temperature and the second temperature; a closed loop module configured to, based on whether closed loop control is disabled, generate a correction value based on the target temperature and the temperature of the coolant entering the engine; and a position module configured to adjust a position of the coolant control valve based on the ratio, the correction value and whether closed loop control is disabled.