CN-121993282-A - Constant water temperature regulation and control method and system based on cold start working condition

CN121993282ACN 121993282 ACN121993282 ACN 121993282ACN-121993282-A

Abstract

The invention provides a constant water temperature regulation and control method and system based on cold start working conditions, and relates to the technical field of automobile engineering, wherein the method comprises the following steps of synchronously executing the following processes based on the high-temperature steady state of an engine, calculating the available waste heat based on the temperature data of engine cooling liquid, and generating and executing a warm air system control instruction to realize warm keeping control of a client; the method comprises the steps of collecting historical data of an engine water temperature regulation process, dynamically correcting a target temperature range and control parameters through a self-learning algorithm to obtain an optimal control parameter set, and adjusting the water path pressure of the whole machine in real time through a dynamic pressure stabilizing system based on the optimal control parameter set and the high-temperature steady state of the engine to ensure that the water path pressure of the whole machine is matched with a current water temperature regulation target. The intelligent water temperature constant control under the cold start working condition of the engine is realized through data-driven closed-loop regulation and control and autonomous optimization.

Inventors

LUO WEI
GUO WENYUE
MAO LONGGUI
ZHU SULIN
WANG CHUNLING
LU JINGDONG
LI WENJUN

Assignees

广西玉柴机器股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260129

Claims (10)

1. The constant water temperature regulation and control method based on the cold start working condition is characterized by comprising the following steps: step 100, collecting monitoring data including ambient temperature, cabin temperature and engine water temperature in real time; step 200, judging current operation conditions based on the monitoring data, wherein the current operation conditions comprise a customer warm-keeping condition and an engine cold start condition, and the judgment of the engine cold start condition is at least based on engine water temperature data; Step 300, when the cold starting working condition of the engine is judged, acquiring water temperature data of the engine, and controlling the multifunctional valve to be closed and establish a small-cycle running state of the engine based on the water temperature data of the engine being lower than a preset low-temperature threshold value; step 400, based on the high-temperature steady state of the engine, synchronously executing the following processes of calculating the available waste heat based on the temperature data of the engine coolant, generating and executing a warm air system control instruction to realize the warm-keeping control of a client; And 500, based on the optimized control parameter set and the high-temperature steady state of the engine, the water path pressure of the whole machine is adjusted in real time through a dynamic pressure stabilizing system, so that the water path pressure of the whole machine is ensured to be matched with the current water temperature regulation target.
2. The constant water temperature regulating method based on the cold start condition according to claim 1, wherein step 200 comprises: Based on the environmental temperature data in the monitoring data, when the environmental temperature is lower than or equal to a first preset threshold value, judging to enter a customer warm-keeping working condition and triggering a warm air system to start; based on the temperature data in the cabin in the monitoring data, when the temperature in the cabin is lower than or equal to a second preset threshold value, judging to enter a customer warm-keeping working condition and triggering a warm air system to start; based on the environmental temperature data in the monitoring data, when the environmental temperature is higher than or equal to a third preset threshold value, judging that the client thermal insulation working condition is exited and triggering the air conditioning system to start; Based on the temperature data in the cabin in the monitoring data, when the temperature in the cabin is higher than or equal to a fourth preset threshold value, judging to exit the client warm-keeping working condition and triggering the air conditioning system to start; and judging to enter an engine cold start working condition when the engine water temperature is lower than a preset cold start threshold value based on the engine water temperature data in the monitoring data, wherein the judgment of the engine cold start working condition is at least based on the engine water temperature data and is independent of the judgment of a client warm-keeping working condition.
3. The method of constant water temperature regulation based on cold start conditions of claim 2, wherein step 300 comprises: When the engine cold start working condition is judged, acquiring engine water temperature data, controlling the multifunctional valve to be closed according to the condition that the engine water temperature data is lower than a preset low temperature threshold value, and simultaneously controlling the electric control water pump to execute the engine small cycle running state through the ECU to establish the engine small cycle running state; Continuously acquiring a real-time data point set acquired by an engine water temperature sensor based on the engine small-cycle running state; based on a real-time data point set, constructing a convex hull boundary, extracting characteristic points of the convex hull boundary through a Tagerlace-Prak algorithm, and reserving key data points representing water temperature change trend to obtain a simplified water temperature characteristic point set; Calculating a water temperature change gradient based on the simplified water temperature characteristic point set, and obtaining a judging result of entering a temperature rising transition stage when the water temperature change gradient is confirmed to continuously exceed a preset threshold value and the real-time engine water temperature reaches a preset temperature rising threshold value; and according to the judging result of the temperature rise transition stage, on the basis of maintaining the engine small-cycle running state, sending an opening instruction to the electromagnetic valve of the degassing system, starting all functions of the engine degassing system, and establishing the engine degassing system running state.
4. The method of constant water temperature regulation based on cold start conditions of claim 3 further comprising step 300: Based on the running state of the engine degassing system, continuously acquiring engine water temperature data, and controlling the multifunctional valve to be opened to an initial opening according to the judging result that the engine water temperature data reaches a preset high temperature threshold value; calculating a temperature deviation value between the water temperature data of the engine and a preset target temperature based on the initial opening; According to the temperature deviation value, an opening control instruction is obtained; calculating a proportional term output value according to the opening control instruction and the temperature deviation value and the proportional coefficient, carrying out integral operation on the temperature deviation value and calculating an integral term output value according to an integral time constant, and simultaneously carrying out differential operation on the temperature deviation value and calculating a differential term output value according to a differential time constant; superposing the proportional term output value, the integral term output value and the differential term output value to obtain a corresponding opening correction; The final control signal is output to a multifunctional valve actuator to drive the multifunctional valve to reach the target opening position; based on real-time feedback of the target opening position, a closed-loop regulation process from opening correction amount calculation to valve position driving is continuously executed, continuous regulation and control of the flow of engine cooling liquid is realized, and the engine is enabled to enter and maintain a high-temperature steady state.
5. The method of constant water temperature regulation based on cold start conditions of claim 4, wherein step 400 comprises: acquiring engine coolant temperature data based on the high-temperature steady state of the engine; Calculating a temperature difference value based on the engine coolant temperature data and combining the engine coolant flow data and the in-cabin temperature data; According to the temperature difference, a preset specific heat capacity parameter of the cooling liquid is combined to obtain theoretical heat flow passing through a heat exchanger of a warm air system in unit time; Determining actual available waste heat based on the theoretical heat flow, and generating a corresponding warm air system control instruction according to the actual available waste heat; And sending the warm air system control instruction to a warm air system actuator, and adjusting the opening degree of a valve of the warm air system and the rotating speed of a fan to realize the warm-keeping control of a client.
6. The method of constant water temperature regulation based on cold start conditions of claim 5 further comprising step 400: synchronously collecting historical data of a water temperature regulation process from the establishment of a small-cycle running state of an engine to the high-temperature steady state of the engine by starting a degassing system to run until the engine enters a high-temperature steady state through dynamically adjusting the opening of a multifunctional valve, wherein the historical data comprises a temperature deviation value sequence, a control output sequence and a system response time sequence; Performing data preprocessing on the historical data of the water temperature regulation process, wherein the data preprocessing comprises the steps of removing abnormal data points, and performing data standardization processing to obtain a standardized data set; Calculating the mean square error of the water temperature of the real-time engine and the target temperature based on the normalized data set, and evaluating the control quality based on the mean square error; Analyzing dynamic response indexes including overshoot and adjustment time according to the control quality, and performing performance evaluation on the dynamic response indexes to obtain dynamic performance evaluation values; and dynamically adjusting the target temperature range and the control parameters of a closed-loop control algorithm based on the dynamic performance evaluation value to obtain an optimized control parameter set.
7. The method for constant water temperature regulation based on cold start conditions of claim 6, wherein step 500 comprises: determining a target pressure range of the whole waterway matched with a current water temperature regulation target based on the optimized control parameter set and the high-temperature steady state of the engine; The pressure sensor of the dynamic pressure stabilizing system is used for collecting the pressure data of the waterway of the whole machine in real time to obtain the current pressure value; calculating a pressure deviation value of the current pressure value and a target pressure range; Calculating a pressure adjustment amount based on the pressure deviation value; Generating a pressure stabilizing control instruction according to the pressure regulating quantity, and outputting the pressure stabilizing control instruction to an executing mechanism of the dynamic pressure stabilizing system; driving an executing mechanism to generate corresponding pressure adjusting action based on the pressure stabilizing control instruction; based on the pressure regulating action, monitoring the pressure change of the waterway of the whole machine in real time through a pressure sensor, and feeding back the monitored pressure data to an ECU (electronic control unit) to obtain feedback data; Recalculating a pressure adjustment amount based on a comparison result of the feedback data and a target pressure range; Generating an updated voltage stabilizing control command according to the recalculated pressure regulating quantity; the dynamic adjustment of the waterway pressure of the whole machine is realized by continuously executing the closed-loop pressure adjusting process, so that the waterway pressure of the whole machine is stabilized within the target pressure range.
8. A constant water temperature regulation system based on cold start conditions, the system implementing the method of any one of claims 1 to 7, comprising: the acquisition module is used for acquiring monitoring data including the ambient temperature, the cabin temperature and the engine water temperature in real time; the working condition judging module is used for judging the current operation working condition based on the monitoring data, wherein the current operation working condition comprises a client warm-keeping working condition and an engine cold starting working condition, and the judgment of the engine cold starting working condition is at least based on the engine water temperature data; The system comprises a cold start regulation and control module, a low-temperature control module, a high-temperature control module and a high-temperature control module, wherein the cold start regulation and control module is used for acquiring engine water temperature data when judging an engine cold start working condition, controlling the multifunctional valve to be closed and establishing an engine small-cycle running state based on the engine water temperature data being lower than a preset low-temperature threshold value; The optimizing module is used for synchronously executing the following processes based on the high-temperature steady state of the engine, namely calculating the available waste heat based on the temperature data of the engine cooling liquid, generating and executing a warm air system control instruction to realize the warm-keeping control of a client; The pressure control module is used for adjusting the water path pressure of the whole machine in real time through the dynamic pressure stabilizing system based on the optimized control parameter set and the high-temperature steady state of the engine, and ensuring that the water path pressure of the whole machine is matched with the current water temperature regulation target.
9. A computing device, comprising: One or more processors; storage means for storing one or more programs which when executed by the one or more processors cause the one or more processors to implement the method of any of claims 1 to 7.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a program which, when executed by a processor, implements the method according to any of claims 1 to 7.

Description

Constant water temperature regulation and control method and system based on cold start working condition Technical Field The invention relates to the technical field of automobile engineering, in particular to a constant water temperature regulation and control method and system based on cold start working conditions. Background Under the cold starting working condition of the engine, the prior art generally adopts a water temperature regulation and control method based on a fixed threshold value, and basic temperature control is realized by configuring a temperature regulator, a radiator and other components in a cooling system. However, such methods have the following drawbacks in terms of data processing and control strategies: Firstly, the existing system is used for identifying the dynamic change of the water temperature, the existing system is dependent on simple threshold comparison, the early intelligent identification capability of nonlinear characteristics of the temperature rising process is lacked, so that working condition judgment is delayed and the engine warming efficiency is possibly affected, secondly, the traditional control method is only dependent on monitoring data at the current moment, historical data in the water temperature regulation and control process of the engine, including a temperature deviation sequence, a control output sequence, system response time and the like, cannot be fully utilized, the limitation of data utilization makes the system unable to establish a complete regulation and control process model, and precise feedforward control can be difficult to achieve, in the aspect of cooperative control of client warm keeping and engine cold starting, the prior art fails to construct a closed loop data link between an engine thermal management system, a passenger cabin heating system and a hydraulic pressure stabilizing system, warm air control and overall water pressure regulation are respectively administrative, and unified optimization control parameter sets are lacked, and the integral energy efficiency and response performance of the system are possibly not optimal. Disclosure of Invention The invention aims to solve the technical problem of providing a constant water temperature regulation and control method and a constant water temperature regulation and control system based on a cold start working condition, which realize intelligent water temperature constant control under the cold start working condition of an engine through closed loop regulation and control driven by data and autonomous optimization. In order to solve the technical problems, the technical scheme of the invention is as follows: in a first aspect, a method for controlling constant water temperature based on cold start conditions, the method comprising: Collecting monitoring data including ambient temperature, cabin temperature and engine water temperature in real time; Judging the current operation working condition based on the monitoring data, wherein the current operation working condition comprises a client warm-keeping working condition and an engine cold start working condition, and the judgment of the engine cold start working condition is at least based on the engine water temperature data; When the engine cold start working condition is judged, acquiring engine water temperature data, and controlling the multifunctional valve to be closed and establish a small-cycle running state of the engine based on the engine water temperature data being lower than a preset low-temperature threshold value; Based on the high-temperature steady state of the engine, synchronously executing the following processes of calculating the available waste heat based on the temperature data of the engine cooling liquid, generating and executing a warm air system control instruction to realize the warm keeping control of a client; Based on the optimized control parameter set and the high-temperature steady state of the engine, the water path pressure of the whole machine is adjusted in real time through the dynamic pressure stabilizing system, so that the water path pressure of the whole machine is ensured to be matched with the current water temperature regulation target. In a second aspect, a constant water temperature regulation system based on cold start conditions includes: the acquisition module is used for acquiring monitoring data including the ambient temperature, the cabin temperature and the engine water temperature in real time; the working condition judging module is used for judging the current operation working condition based on the monitoring data, wherein the current operation working condition comprises a client warm-keeping working condition and an engine cold starting working condition, and the judgment of the engine cold starting working condition is at least based on the engine water temperature data; The system comprises a cold start regulation and control module, a low-temperature contr