Method and device for preventing water pump from idling and being damaged

Abstract

The invention discloses a method and a device for preventing a water pump from idling and being damaged. The method comprises the steps that when detecting that no water exists in the water pump, the number N of times of no water in an engine ECU is accumulated by one, and meanwhile timing is started; when the number N of times of no water is smaller than the set number N and the timing time T is smaller than the preset time T, an engine normally runs or is started; otherwise, whether the current engine is in a control exceeding state or not is judged; if yes, torque limiting is not conducted on the engine which normally runs, starting limiting is not conducted on the engine in the starting state, and only a water pump fault is reported; and if not, torque limiting is conducted on the engine which normally runs, starting limiting is conducted on the engine in the starting state, and meanwhile the water pump fault is reported. When the water pump fault occurs, a user can be reminded in time, torque limiting or starting limiting is conducted in time in the non-control-exceeding state, the problem that the water pump is damaged due to long-time no-water high-speed idling is effectively solved, and the service life of the water pump is prolonged.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to a method and a device for preventing idling damage of a water pump. Background technique [0002] The external circulating water pump of the ship is an open cycle, pumping river water and seawater to the engine heat exchanger to cool the internal circulating water and the intercooler; when the water level in the pump is too low or there is no water, the pump is prone to idling. The idling water pump is damaged because it cannot be cooled, which seriously shortens the service life of the water pump, and long-term idling will directly cause the water pump to be scrapped. At present, there is no device for water level detection on the water pump of the engine, and there is no corresponding control strategy to prevent the water pump from idling damage. Contents of the invention [0003] Aiming at overcoming the deficiencies in the above-mentioned prior art, the technic...

AI Technical Summary

Problems solved by technology

[0002] The external circulating water pump of the ship is an open cycle, pumping river water and seawater to the engine heat exchanger to cool the internal circulating water and the intercooler; when the water level in the pump is too low or there is no water, the pump is prone to idling. The idling water pump is damaged because it cannot be cooled, which seriously shortens the service life of the water pump, and long-term idling will directly lead to the scrapping of the water pump

At present, there is no device for water level detection on the water pump of the engine, and there is no corresponding control strategy to prevent the water pump from idling damage

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