Empty truck adjustment device and air pressure adjustment method

Abstract

The invention provides an empty-weight state adjustment device and an air pressure adjustment method. A main air inlet, a gas circuit outlet and an exhaust port are formed in the outside of the empty-weight state adjustment device. The empty-weight state adjustment device comprises an empty-weight state valve, a first solenoid valve, a second solenoid valve, a pressure sensor and an electronic control unit, wherein the empty-weight state valve is provided with a gas inlet, a gas outlet and a pre-control end; the gas inlet communicates with the total air inlet; the gas outlet communicates withthe gas circuit outlet; the pressure sensor is arranged between the gas outlet and the gas circuit outlet; one end of the first solenoid valve communicates with the total air inlet; the other end of the first solenoid valve communicates with the pre-control end and one end of the second solenoid valve; the other end of the second solenoid valve communicates with the exhaust port; the exhaust portis externally connected with the atmosphere so as to discharge compressed air into the atmosphere; and the pressure sensor, the first solenoid valve and the second solenoid valve are electrically connected with the electronic control unit. Closed-loop control is adopted, and therefore, stability and accuracy during empty-weight state braking are ensured.

Description

technical field [0001] The invention belongs to the field of rail transit vehicle devices, and in particular relates to an empty-load vehicle adjustment device and an air pressure adjustment method. Background technique [0002] At present, in order to improve the transportation efficiency, the load of the vehicle is constantly increasing, and the self-weight is constantly decreasing, which leads to the gradual increase of the empty-to-weight ratio of the vehicle. Therefore, the role of the empty-load vehicle adjustment device is becoming more and more prominent. In order to ensure that the heavy vehicle has sufficient braking force to stop within a specified distance under high-speed and heavy-load conditions, and the braking force of the empty vehicle is not too large, so as to prevent the braking force from exceeding the adhesion force and causing wheel tread abrasions, Therefore, an empty-load truck adjustment device is essential. The existing empty-load truck adjustmen...

AI Technical Summary

Problems solved by technology

The existing empty-load truck adjustment devices mostly adopt open-loop control, that is, the empty-load truck adjustment device is directly connected to the air spring pipeline. However, when there is an error in the empty-load truck adjustment device, it cannot be adjusted in time, resulting in the output of the brake pressure signal. is less accurate

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