CN-119778091-B - Unmanned diesel engine monitoring method

CN119778091BCN 119778091 BCN119778091 BCN 119778091BCN-119778091-B

Abstract

The invention discloses a diesel engine monitoring method for unmanned use, which relates to an engine monitoring technology, wherein an ECU (electronic control unit) acquires demand parameters of a diesel engine from an unmanned vehicle controller, the ECU performs fault analysis according to the acquired diesel engine operation parameters and the demand parameters to judge whether the diesel engine is in normal operation or not, if the diesel engine is in abnormal operation as a result of judgment, the ECU generates fault information and sends the fault information to the unmanned vehicle controller, and the unmanned vehicle controller receives the fault information and forwards the fault information to an unmanned dispatching platform. The invention solves the problem that the unmanned vehicle is difficult to find the mechanical failure of the engine in the prior art, and can effectively remind a background manager when the mechanical failure of the diesel engine occurs so as to protect the running safety of the vehicle.

Inventors

XU XINGJUN
DONG XIANGHUAN
ZHAO ZENGLIANG
CHEN JIE

Assignees

广西玉柴机器股份有限公司

Dates

Publication Date: 20260505
Application Date: 20241213

Claims (5)

1. The method for monitoring the diesel engine for the unmanned use is characterized by comprising the following steps of: The ECU acquires the demand parameters of the diesel engine from the unmanned vehicle controller, and performs fault analysis according to the acquired diesel engine operation parameters and the demand parameters to judge whether the diesel engine is in normal operation or not; if the judging result shows that the diesel engine is abnormal in operation, the ECU generates fault information and sends the fault information to an unmanned vehicle controller, and the unmanned vehicle controller receives the fault information and forwards the fault information to an unmanned dispatching platform; When the fault analysis is executed, the ECU firstly traverses the electric control data of the diesel engine to confirm whether an electric control fault code exists or not, if not, the fault analysis is executed, otherwise, the fault type of the electric control fault code is advanced, a fault special processing text is inquired from a database according to the fault type, and then the fault special processing text is sent to an unmanned dispatching platform through an unmanned vehicle controller; The fault analysis comprises power overrun anomaly monitoring, rotating speed deviation overrun anomaly monitoring, rotating speed fluctuation overrun anomaly monitoring and rotating speed acceleration overrun anomaly monitoring, wherein the rotating speed deviation overrun anomaly monitoring is entered when the monitoring result of the power overrun anomaly monitoring is normal, the rotating speed fluctuation overrun anomaly monitoring is entered when the monitoring result of the rotating speed deviation overrun anomaly monitoring is normal, and the rotating speed acceleration overrun anomaly monitoring is entered when the monitoring result of the rotating speed toggle overrun anomaly monitoring is normal.
2. The method for monitoring the unmanned diesel engine according to claim 1, wherein the power overrun abnormality monitoring specifically comprises the steps that the ECU searches a theoretical fuel injection quantity by combining received required power and required transmission efficiency with calibrated universal characteristics, compares the actual fuel injection quantity acquired by the ECU with the theoretical fuel injection quantity, and judges that the mechanical parts of the diesel engine are abnormal when the deviation of the actual fuel injection quantity and the theoretical fuel injection quantity exceeds a set oil quantity difference threshold value.
3. The method for monitoring the diesel engine for the unmanned use according to claim 1, wherein the monitoring of the overrun abnormality of the rotational speed deviation is specifically that when the required rotational speed received by the ECU is detected, the actual rotational speed of the diesel engine is controlled according to the required rotational speed, and when the actual rotational speed of the diesel engine does not reach the required rotational speed within a preset time, the abnormality of the increase of the rotational speed of the diesel engine is detected.
4. The method for monitoring the diesel engine for the unmanned use according to claim 1, wherein the monitoring of the overrun abnormality of the fluctuation of the rotation speed is specifically that the ECU judges the rotation speed stability according to the integral value of the deviation absolute value of the received required rotation speed and the collected actual rotation speed, and judges that the control stability of the rotation speed of the diesel engine is abnormal when the integral value exceeds a preset integral threshold value in unit time.
5. The method for monitoring the unmanned diesel engine according to claim 1, wherein the abnormal monitoring of the overrun of the rotational speed and the acceleration is specifically that the ECU calibrates a target rotational speed according to the accelerator opening of the diesel engine, calculates a rotational speed difference and a time difference according to the target rotational speeds corresponding to two moments, calculates the rotational speed and the acceleration of the diesel engine according to the rotational speed difference and the time difference, and judges that the diesel engine is in cylinder-lack fire if the rotational speed and the acceleration of the diesel engine are smaller than the target acceleration.

Description

Unmanned diesel engine monitoring method Technical Field The invention relates to an engine monitoring technology, in particular to a diesel engine monitoring method for unmanned use. Background The working process of the diesel engine is a complex combustion process of multi-parameter coupling, and requires the coordination and support of an air inlet system, a fuel system, an electric control system, a lubricating system and the like. The electronic control diesel engine can carry out fault diagnosis to an engine sensor, an electronic control actuator and a wire harness, but cannot accurately judge faults to mechanical parts. The diagnosis of the unmanned vehicle on the power system is mainly based on the diagnosis of the diesel engine control unit, and the diagnosis method has the defect that when applied to the unmanned field, the engine cannot be early-warned when mechanical failure occurs, and the serious accident risk is caused. In the prior art, the diagnosis of the diesel engine controller is mainly used for judging whether the engine is normal or not. However, the scheme is difficult to find in time for unstable rotation speed, black smoke, insufficient power, abnormal sound and the like caused by mechanical faults of the engine. Disclosure of Invention The invention aims to solve the technical problem of providing a diesel engine monitoring method for unmanned use aiming at the defects of the prior art, and solves the problem that the mechanical failure of an engine is difficult to find in an unmanned vehicle in the prior art. The invention relates to a method for monitoring a diesel engine for unmanned use, which comprises the following steps: The method comprises the steps that an ECU acquires the demand parameters of a diesel engine from an unmanned vehicle controller, the ECU performs fault analysis according to the acquired diesel engine operation parameters and the demand parameters to judge whether the diesel engine is normal or not, if the diesel engine is abnormal in operation, the ECU generates fault information and sends the fault information to the unmanned vehicle controller, and the unmanned vehicle controller receives the fault information and forwards the fault information to an unmanned dispatching platform. And when the fault analysis is executed, the ECU firstly traverses the electric control data of the diesel engine to confirm whether an electric control fault code exists or not, if not, the fault analysis is executed, otherwise, the fault type of the electric control fault code is advanced, a fault special processing text is inquired from a database according to the fault type, and then the fault special processing text is sent to an unmanned dispatching platform through an unmanned vehicle controller. The fault analysis comprises power overrun anomaly monitoring, rotating speed deviation overrun anomaly monitoring, rotating speed fluctuation overrun anomaly monitoring and rotating speed acceleration overrun anomaly monitoring, wherein the rotating speed deviation overrun anomaly monitoring is entered when the monitoring result of the power overrun anomaly monitoring is normal, the rotating speed toggle overrun anomaly monitoring is entered when the monitoring result of the rotating speed deviation overrun anomaly monitoring is normal, and the rotating speed acceleration overrun anomaly monitoring is entered when the monitoring result of the rotating speed toggle overrun anomaly monitoring is normal. The ECU searches theoretical oil injection quantity by combining the received required power and the required transmission efficiency with calibrated universal characteristics, compares the acquired actual oil injection quantity with the theoretical oil injection quantity, and judges that the mechanical parts of the diesel engine are abnormal when the deviation between the actual oil injection quantity and the theoretical oil injection quantity exceeds a set oil quantity difference threshold value. Further, the monitoring of the abnormal deviation of the rotating speed is specifically that when the ECU receives the required rotating speed, the actual rotating speed of the diesel engine is controlled according to the required rotating speed, and when the actual rotating speed of the diesel engine does not reach the required rotating speed within a preset time, the abnormal deviation of the rotating speed is judged to be abnormal in the lifting of the rotating speed of the diesel engine. Further, the monitoring of the abnormal fluctuation of the rotating speed is specifically that the ECU judges the rotating speed stability according to the received integral value of the deviation absolute value of the required rotating speed and the actual rotating speed collected by the ECU, and judges that the abnormal control stability of the rotating speed of the diesel engine exists when the integral value exceeds a preset integral threshold value in unit time. The ECU calibrates a target ro