Control method for preventing rail vehicle breakage caused by communication failures

Abstract

The invention provides a control method for preventing rail vehicle breakage caused by communication failures. The control method comprises the steps that S1, a central control unit (CCU) is set to periodically detect a life signal sent by a diesel engine control module (ECM) within a fixed time; S2, when the signal is not refreshed, the communication failures are judged to exist between the CCU and the ECM, and a rail vehicle automatically shifts to a diesel engine failure speed adjusting mode or enters the diesel engine failure speed adjusting mode by being set by a driver through a switch; and at the moment, the CCU drives a diesel engine failure speed adjusting relay to act to send a failure speed adjusting signal to the ECM, and a diesel engine is stabilized at a specific rotation speed value through the ECM; and S3, under the diesel engine failure speed adjusting mode, control over the intermediate voltage is not calculated by the rotation speed of the diesel engine any longer but is judged by a gear signal of a motorman controller, and the intermediate voltage benchmark value is given. The control method for preventing rail vehicle breakage caused by the communication failures has the advantages of being simple in principle, easy to achieve, good in reliability and the like.

Description

technical field [0001] The invention mainly relates to the field of locomotive control, in particular to a control method for preventing rail vehicles from being broken due to communication faults. Background technique [0002] The locomotive adopts a microcomputer network control system, which consists of CCU (central control unit), DCU (transmission control unit), GWM (gateway module), IDU (intelligent display) and ECM (diesel engine control module). like figure 1 As shown, CAN communication is used between the central control unit CCU and ECM, and MVB network is used among CCU (central control unit), DCU (transmission control unit), GWM (gateway module), and IDU (intelligent display). CCU is responsible for locomotive-level control, and its main functions include locomotive logic control, locomotive traction / braking characteristic control, fault diagnosis and protection, etc. The DCU is responsible for the transmission stage control, receives the given traction force fr...

AI Technical Summary

Problems solved by technology

[0005] (1) When there is a communication failure between the CCU and the ECM, the CCU can no longer normally control the ECM to adjust the speed of the diesel engine, and the diesel engine only maintains an idle speed; at the same time, the CCU cannot obtain the diesel engine speed signal, and cannot calculate the reference value of the main engine power and the traction force given fixed value, resulting in the inability to control the power of the main generator and the torque control of the traction motor, thus causing the locomotive to be unable to drive and cause a machine breakage accident

[0006] (2) When there is a communication failure between the CCU and the DCU, the CCU cannot transmit the given value of the traction torque to the DCU, so the DCU cannot normally control the output torque of the traction motor, so that the locomotive cannot be tractioned and run, resulting in a machine breakage accident

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