An internal circulation air pump life detection device and method

Abstract

The invention discloses a life detecting device and a method for an internal circulation air pump, and belongs to the technical field of a fluid pressure actuator. The life detecting device comprisesa distribution valve, the distribution valve is provided with an air inlet, an air outlet and an air spring port; the inner circulation air pump is provided with a first air nozzle, a second air nozzle and a motor for driving the pump to work, the air inlet is connected to the second air nozzle through the first air passage; the air inlet is connected with the second air nozzle by a first air circuit; a first pressure sensor is arranged in the first air circuit; a second pressure sensor is arranged in the air spring port; the air outlet is connected with an air storage tank by a second air circuit; a third pressure sensor is arranged in the second air circuit; and a fourth pressure sensor is arranged in the air storage tank. Through monitoring whether the final outlet pressure is greater than the load, and monitoring whether the current, voltage and other parameters are still within the rated value during the working process, the device judges whether the internal circulation air pumpis working normally, and accumulates the number of normal operations as an embodying item for judging the life, and then the objective detection of the consistency of the working life of the internalcirculation air pump is automatically completed.

Description

technical field [0001] The invention belongs to the technical field of fluid pressure actuators, and in particular relates to a life detection device and method for an internal circulation air pump. Background technique [0002] With the development of automobile industry technology, in order to enhance the comfort and stability of vehicles during driving, air suspension systems have been widely used. It uses the air spring to buffer the vibration from the wheels, and adjusts the air volume of the air spring in real time according to the road conditions, so as to change the height of the air spring to achieve the purpose of highly stable vehicle body. [0003] In practical application, the charging and discharging state of the air spring is switched by the solenoid valve. When the air spring needs to be raised, the solenoid valve opens its inflation branch, and after the air pump sucks in the outside air, pressurizes the air spring to complete the inflation process; when th...

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Problems solved by technology

In the above process, the air spring directly discharges part of the high-pressure gas into the atmosphere when exhausting, and the air pump needs to repressurize the sucked atmosphere again when inflating, which increases the working intensity of the air pump to a certain extent and prolongs the working time. It not only affects the comfort of the vehicle to a certain extent, but also causes energy waste

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