Patent ID: 11927125
Assignee: KOMATSU LTD.
Field: Environmental technology (Chemistry)
Classification: CPC F  Y | IPC F

Claim 0:
1. A prediction device that predicts time for a reducing agent accommodated in a container mounted on a work vehicle to freeze, the device comprising:
the container having a heater tube therein for circulating engine coolant to heat the reducing agent in the container;
a remaining amount information acquisition unit configured to acquire remaining amount information indicating a remaining amount of the reducing agent accommodated in the container;
a wall surface temperature acquisition unit configured to acquire a wall surface temperature detection value that is a detection result of a wall surface temperature of the container;
a reducing agent temperature acquisition unit configured to acquire a reducing agent temperature detection value that is a detection result of a temperature of the reducing agent; and
a time calculation unit configured to calculate the time for the reducing agent to freeze based on the wall surface temperature detection value, the reducing agent temperature detection value, and the remaining amount information,
wherein the time calculating unit calculates the freezing prediction time during which the reducing agent drops to a freezing point temperature and is maintained in a solid-liquid coexistence region of a temperature drop curve diagram of the reducing agent,
whereby when freezing of the reducing agent in the container is detected, then circulation of the engine coolant in the heater tube is started.