| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique for preventing overheating of an internal combustion engine by using cooling water having a specific heat change band in at least one temperature region. <P>SOLUTION: This device of controlling cooling water of an internal combustion engine using the cooling water having a specific heat change band while the specific heat changes in at least one temperature region comprises: a thermostat subject to opening and closing control for adjusting a temperature of the cooling water and having variable opening and closing control timing; a remaining latent heat amount estimation means for estimating a remaining latent heat not contributing to temperature rise of the cooling water obtained by the cooling water having the specific heat change band; and a control means opening the thermostat when the remaining latent heat amount estimated by the remaining latent heat amount estimation means becomes equal to or lower than a predetermined value being a threshold as to whether it is the timing for opening the thermostat. <P>COPYRIGHT: (C)2013,JPO&INPIT |
