Method for acquiring, monitoring and processing engine parameters

Abstract

The invention discloses a method for acquiring, monitoring and processing engine parameters, which relates to an engine control technology and comprises the following steps of: classifying sensors which are not accessed into a controller according to types of acquired parameters, simultaneously acquiring a classification number, and setting acquisition units consistent with the classification number according to the classification number, the sensors which have the same acquisition parameter type and are not connected to the controller are connected to the same acquisition unit to be analyzed and processed, if the analysis result is that sensor signals are abnormal, fault information is generated and sent to the controller to be subjected to fault processing, and meanwhile the controller sends the fault information to an instrument. The risk of logic misjudgment of the controller is reduced, the monitoring requirement for a large number of sensors in the engine is met, the operation conditions of the engine and the sensors can be accurately known through the controller, timely feedback is achieved, and fault reasons can be conveniently and clearly cleared.

Description

Technical Field

[0001] The invention relates to engine control technology, and more specifically, to a method for collecting, monitoring and processing engine parameters. Background Art

[0002] In the engine, its operating parameters are collected by sensors and then directly input to the controller to monitor various parameters of the engine. However, the number of parameter channels such as pressure and resistance type PIN angle of the controller (i.e. ECU) is limited, so the operating parameters of the engine cannot be fully connected to the controller for comprehensive monitoring and processing, and the engine monitoring parameter sensors that cannot be connected to the control are connected to the instrument for monitoring. For example, for the current multi-cylinder, large-bore and high-end models, it is required to monitor a series of parameters such as the exhaust temperature of each cylinder, negative pressure, supercharger speed, water temperature, oil temperature and oil pressure, bearing temperature, pressure and temperature before and after the diesel filter, and various liquid levels to ensure reliable operation of the engine. For example, for a 20-cylinder model, there are more than 30 sensors for single bearing temperature and exhaust temperature of each cylinder, and about 20 sensors for water temperature, oil temperature, diesel temperature, pressure, and liquid level. The current controller temperature and pressure PIN angle channels are only about 20, and the excess temperature and pressure sensors can only be directly connected to the instrument. The instrument can only perform parameter monitoring, threshold alarm, and threshold shutdown (the instrument cuts off the main power of the ECU) for the parameters of these sensors, but cannot handle the open circuit, broken circuit, or short circuit of the sensor. In addition, when the sensor fails, it cannot provide reasonable processing measures for the engine's operating conditions, such as speed limit, multi-level torque limit, limp home, and processing after the accumulated fault cycle. In addition, when the instrument executes alarm and shutdown measures, the engine controller cannot monitor the fault shutdown and alarm fault information, which can easily affect the logic control of the controller. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method for collecting, monitoring and processing engine parameters in view of the deficiencies in the prior art, thereby ensuring stable and reliable operation of the engine and reducing the risk of controller logic misjudgment.

[0004] The method for collecting, monitoring and processing engine parameters described in the present invention classifies sensors that are not connected to the controller according to the type of parameters collected, and obtains the number of categories at the same time. According to the number of categories, collection units consistent with the number of categories are set, and the sensors that are not connected to the controller and have the same type of collected parameters are connected to the same collection unit for analysis and processing. If the analysis result is that the sensor signal is abnormal, fault information is generated and sent to the controller for fault processing, and the controller sends the fault information to the instrument at the same time.

[0005] As a further improvement, the acquisition unit is provided with the minimum output voltage and the maximum output voltage of each sensor connected thereto, as well as the maximum limit value and the minimum limit value of the sensor monitoring data value under reliable operation of the engine;

[0006] The analysis and processing are specifically as follows:

[0007] When the acquisition unit monitors that the output voltage of the sensor connected to it is greater than the set maximum voltage, a sensor over-high fault is generated; when the acquisition unit monitors that the output voltage of the sensor connected to it is less than the set minimum voltage, a sensor over-low fault is generated; when the acquisition unit detects that the monitoring data value of the sensor is greater than the set maximum limit value, a monitoring value over-high fault is generated at the position corresponding to the sensor; when the acquisition unit detects that the monitoring data value of the sensor is less than the set minimum limit value, a monitoring value over-low fault is generated at the position corresponding to the sensor.

[0008] Furthermore, the sensor over-height fault is a sensor open circuit or short circuit fault.

[0009] Furthermore, the sensor ultra-low fault is a sensor short-circuit fault.

[0010] As a further improvement, the acquisition unit communicates with the controller via the J1939 protocol.

[0011] As a further improvement, the controller communicates with the instrument via the J1939 protocol.

[0012] Beneficial Effects

[0013] The advantages of the present invention are as follows: sensors that are not connected to the controller are classified and connected to the same acquisition unit, the sensor signals are analyzed and processed by the acquisition unit to identify faults, and fault information is generated and sent to the controller for fault processing. At the same time, the controller sends the fault information to the instrument, thereby realizing monitoring of the engine and each sensor that is not connected to the controller, ensuring stable and reliable operation of the engine, and reducing the risk of controller logic misjudgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the connection structure between the acquisition unit, the engine and the controller of the present invention. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the embodiments, but it does not constitute any limitation to the present invention. Any limited number of modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0016] See also Figure 1The present invention provides a method for collecting, monitoring and processing engine parameters. The sensors not connected to the controller are classified according to the type of parameters collected, and the number of classifications is obtained at the same time. The collection units that are consistent with the number of classifications are set according to the number of classifications, and the sensors not connected to the controller with the same type of collected parameters are connected to the same collection unit for analysis and processing. If the analysis result is that the sensor signal is abnormal, fault information is generated and sent to the controller for fault processing, and the controller sends the fault information to the instrument at the same time. That is, the present invention assists the controller in collecting and monitoring parameters through the collection unit, and realizes the monitoring of the engine and each sensor not connected to the controller, thereby ensuring the stable and reliable operation of the engine and reducing the risk of logic misjudgment of the controller.

[0017] Specifically, in the present embodiment, the acquisition unit is provided with the output minimum voltage and maximum voltage of each sensor connected thereto, as well as the maximum limit value and minimum limit value of the sensor monitoring data value under reliable operation of the engine. When the acquisition unit monitors that the output voltage of the sensor connected thereto is greater than the set maximum voltage, a sensor over-high fault is generated, indicating that the sensor is open circuit or short circuit fault. When the acquisition unit monitors that the output voltage of the sensor connected thereto is less than the set minimum voltage, a sensor over-low fault is generated, indicating that the sensor is short circuit fault. When the acquisition unit detects that the monitoring data value of the sensor is greater than the set maximum limit value, a monitoring value over-high fault is generated at the position corresponding to the sensor, indicating that the water temperature at the position where the sensor is installed is too high or the pressure is too high. When the acquisition unit detects that the monitoring data value of the sensor is less than the set minimum limit value, a monitoring value over-low fault is generated at the position corresponding to the sensor, indicating that the water temperature at the position where the sensor is installed is too low or the pressure is too low.

[0018] If the above fault occurs, the acquisition unit will send the fault to the controller through the J1939 protocol, and the controller will handle the corresponding fault failure strategy for the engine, such as shutdown, speed limit, torque limit, default value, etc. At the same time, the controller sends the fault code to the instrument through the J1939 message. This meets the monitoring needs of a large number of sensors in the engine, and can accurately know the operating status of the engine and sensors through the controller, and provide timely feedback, which is convenient for clarifying the cause of the fault.

[0019] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A method for collecting, monitoring and processing engine parameters, characterized in that: The sensors not connected to the controller are classified according to the types of collected parameters, and the number of classifications is obtained. A collection unit consistent with the number of classifications is set according to the number of classifications, and the sensors not connected to the controller with the same type of collected parameters are connected to the same collection unit for analysis and processing. If the analysis result is that the sensor signal is abnormal, fault information is generated and sent to the controller for fault processing. At the same time, the controller sends the fault information to the instrument.

2. The method for collecting, monitoring and processing engine parameters according to claim 1, characterized in that: The acquisition unit is provided with the minimum output voltage and the maximum output voltage of each sensor connected thereto, as well as the maximum limit value and the minimum limit value of the sensor monitoring data value under reliable operation of the engine; The analysis and processing are specifically as follows: When the acquisition unit monitors that the output voltage of the sensor connected to it is greater than the set maximum voltage, a sensor over-high fault is generated; when the acquisition unit monitors that the output voltage of the sensor connected to it is less than the set minimum voltage, a sensor over-low fault is generated; When the acquisition unit detects that the monitoring data value of the sensor is greater than the set maximum limit value, a monitoring value excessively high fault is generated at the position corresponding to the sensor; when the acquisition unit detects that the monitoring data value of the sensor is less than the set minimum limit value, a monitoring value excessively low fault is generated at the position corresponding to the sensor.

3. The method for collecting, monitoring and processing engine parameters according to claim 2, characterized in that: The sensor over-height fault is a sensor open circuit or disconnection fault.

4. The method for collecting, monitoring and processing engine parameters according to claim 2, characterized in that: The sensor ultra-low fault is a sensor short-circuit fault.

5. The method for collecting, monitoring and processing engine parameters according to claim 1, characterized in that: The acquisition unit communicates with the controller via the J1939 protocol.

6. The method for collecting, monitoring and processing engine parameters according to claim 1, characterized in that: The controller communicates with the instrument via the J1939 protocol.

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