Method and system for diagnosing insufficiency of vehicle coolant

摘要

A method and a system for diagnosing insufficiency of vehicle coolant includes a preparing step of checking whether the vehicle is in a stop state and is on flat ground. An operating step applies a predefined output to a coolant water pump when the vehicle is in the stop state and is on flat ground. A measuring step measures a rotation speed of an impeller of the coolant water pump for a period in which the predefined output is applied to the coolant water pump. A M determining step compares the measured rotation speed of the impeller of the coolant water pump with a reference speed to determine whether or not the coolant is insufficient.

主权项

1. A method for diagnosing insufficiency of a vehicle coolant, comprising:
a preparing step of checking whether the vehicle is in a stop state and is on flat ground; an operating step of applying a predefined output to a coolant water pump when the vehicle is in the stop state and is on the flat ground; a measuring step of measuring a rotation speed of an impeller of the coolant water pump for a period in which the predefined output is applied to the coolant water pump; and a determining step of comparing the measured rotation speed of the impeller of the coolant water pump with a reference speed to determine whether or not the coolant is insufficient, wherein in the operating step, the predefined output is applied to the coolant water pump for a first reference time, and in the determining step, rotation speeds of the impeller of the coolant water pump measured for the first reference time are averaged, and the average value is compared with the reference speed to determine whether or not the coolant is insufficient.