CN-122014443-A - Throttle control method and device and vehicle

CN122014443ACN 122014443 ACN122014443 ACN 122014443ACN-122014443-A

Abstract

The application relates to the technical field of vehicles and discloses a control method and device of a throttle valve and a vehicle, wherein the method comprises the steps of obtaining target air inflow of an engine and running data of the throttle valve of the engine in a current state; the method comprises the steps of determining a reference control position of a throttle valve according to target air inflow and operation data, obtaining an area correction value to be compensated at the reference control position of the throttle valve if the operation data meet an area self-adaptive activation condition, wherein the area self-adaptive activation condition represents a parameter condition that an air inlet system of an engine is in a stable operation state, determining the target control position of the throttle valve according to the reference control position and the area correction value, and adjusting the throttle valve to the target control position. According to the technical scheme, the problem that safety and reliability are insufficient in control of the throttle position in the related technology is solved, and safety and reliability of control of the throttle position are improved.

Inventors

JING JUNCHAO
HUANG WEISHAN

Assignees

极光湾(宁波)智能科技有限公司
极光湾科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260204

Claims (10)

1. A control method of a throttle valve, characterized by comprising: acquiring target air inflow of an engine and running data of a throttle valve of the engine in a current state; determining a reference control position of the throttle valve according to the target air inflow and the operation data; If the operation data meet the area self-adaptive activation condition, acquiring an area correction value to be compensated for by the throttle valve at the reference control position, wherein the area self-adaptive activation condition represents a parameter condition that an air inlet system of the engine is in a stable operation state; determining a target control position of the throttle valve according to the reference control position and the area correction value; the throttle valve is adjusted to the target control position.
2. The method according to claim 1, wherein the determining the reference control position of the throttle valve based on the target intake air amount and the operation data includes: Calculating boost control pressure and manifold control pressure according to the operation data; Calculating an absolute target flow area based on the target intake air amount, the boost control pressure, and the manifold control pressure; the reference control position is determined based on the absolute target flow area.
3. The method of claim 2, wherein calculating boost control pressure and manifold control pressure from the operating data comprises: Acquiring a first correction coefficient of a control deviation corresponding to the pre-calibrated air inlet flow; acquiring a second correction coefficient corresponding to the pre-calibrated rotation speed and load of the engine; Determining the boost control pressure according to the real boost pressure measured in real time, the preset target boost pressure, the first correction coefficient and the second correction coefficient; Acquiring actual air inlet pressure of an air inlet manifold, preset target air inlet pressure and an air inlet pipe pressure deviation weight coefficient; And determining the manifold control pressure according to the actual air inlet pressure, the target air inlet pressure and the air inlet pipe pressure deviation weight coefficient.
4. A method according to claim 3, wherein the area-adaptive activation conditions comprise the following conditions: the dynamic coefficient of the pressure of the air inlet channel is smaller than a first threshold value; the throttle valve is in a closed-loop control state; The opening degree of an electromagnetic valve of a carbon tank connected with the engine is smaller than a second threshold value; the electromagnetic valve flow coefficient of the carbon tank is smaller than a third threshold value; The intake pressure deviation of the actual intake pressure and the target intake pressure is within a preset pressure deviation range; The scavenging efficiency of the cylinders of the engine is greater than a fourth threshold; The actual intake air amount of the engine is larger than a fifth threshold value corresponding to the rotational speed in the engine rotational speed and intake air amount threshold value map.
5. The method of claim 2, wherein the determining the reference control position based on the absolute target flow area comprises: Calculating a corrected area based on the absolute target flow area, a prestored throttle area adaptive value and an effective flow area relative coefficient adaptive value; compensating the corrected area based on at least one factor of the ambient pressure, the air inlet temperature and the cold working condition to obtain a compensated area, wherein the compensation amount based on the cold working condition is determined by the pre-calibrated engine oil temperature; and determining the reference control position according to the compensated area.
6. The method according to claim 2, wherein the obtaining an area correction value to be compensated for at the reference control position of the throttle valve includes: obtaining the estimated air inflow in the cylinder and the absolute target flow area; Acquiring the air inflow corresponding to the absolute target flow area; The area correction value is calculated based on an intake deviation between the in-cylinder intake air amount and the intake air amount.
7. The method according to claim 6, wherein said calculating the area correction value based on an intake deviation between the in-cylinder intake air amount and the intake air amount includes: determining an intermediate intake air deviation amount according to the in-cylinder intake air amount, a preset deviation correction coefficient and the current flow ratio of an exhaust gas recirculation system, wherein the intermediate intake air deviation amount indicates the intake air deviation of fresh air entering the engine; Obtaining a basic area deviation value according to the intermediate intake air deviation value and the absolute target flow area; Obtaining an area self-adaptive step length according to the basic area deviation value and a preset gain coefficient; And updating the area correction value based on the area self-adaptive step length.
8. The method according to claim 7, wherein the determining an intermediate intake air deviation amount based on the in-cylinder intake air amount, a preset deviation correction coefficient, a current flow rate ratio of an exhaust gas recirculation system, includes: acquiring a first product between the air inflow in the cylinder and a preset deviation correction coefficient; Calculating a difference between the preset value and a current flow ratio of the exhaust gas recirculation system; a second product between the first product and the difference is obtained, and the second product is taken as the intermediate intake deviation amount.
9. A control device of a throttle valve, characterized by comprising: The system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring target air inflow of an engine and running data of a throttle valve of the engine in a current state; a reference control position determining module for determining a reference control position of the throttle valve according to the target intake air amount and the operation data; the correction module is used for acquiring an area correction value to be compensated for the throttle valve at the reference control position if the operation data meet an area self-adaptive activation condition, wherein the area self-adaptive activation condition represents a parameter condition that an air inlet system of the engine is in a stable operation state; a target control position determining module for determining a target control position of the throttle valve according to the reference control position and the area correction value; And the adjusting module is used for adjusting the throttle valve to the target control position.
10. A vehicle comprising a controller including a memory and a processor, the memory and the processor being communicatively coupled to each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the method of controlling the throttle valve of any one of claims 1 to 8.

Description

Throttle control method and device and vehicle Technical Field The application relates to the technical field of vehicles, in particular to a control method and device of a throttle valve and a vehicle. Background The throttle signal is one of important input signals of the hybrid system, is a key input for judging the intention of a driver by the hybrid system, and directly influences the power distribution strategy. In a hybrid vehicle, the target position control of a throttle valve mainly depends on calibration table lookup or simple feedback, and the inadaptability to the pressure change of an air inlet system, the environmental condition and the characteristic change of the throttle valve is insufficient, so that the control of the air inflow is inaccurate, the coordination of a transmitter and motor power is influenced, and finally the safety and the reliability of the vehicle driving are threatened. In other words, in the related art, there is a problem that the control of the throttle position is insufficient in safety and reliability. Disclosure of Invention The application provides a control method and device of a throttle valve and a vehicle, and aims to solve the problem that safety and reliability are insufficient in control of the throttle valve position in the related art. In a first aspect, the present application provides a control method of a throttle valve, the method including: acquiring target air inflow of an engine and running data of a throttle valve of the engine in a current state; Determining a reference control position of a throttle valve according to the target air inflow and the operation data; if the operation data meet the area self-adaptive activation condition, acquiring an area correction value to be compensated for at a reference control position of the throttle valve, wherein the area self-adaptive activation condition represents a parameter condition that an air inlet system of the engine is in a stable operation state; Determining a target control position of the throttle valve according to the reference control position and the area correction value; the throttle valve is adjusted to the target control position. The control method of the throttle valve acquires target demand and real-time state data, firstly determines a high-precision reference control position, further introduces an intelligent safety and learning mechanism, calculates and applies an area correction value for long-term compensation only when the air inlet system is judged to be in stable operation, and finally fuses the reference position and the correction value, outputs the target control position and executes the target control position. The method combines rapid and accurate feedforward control with self-adaptive feedback correction under a safety condition, thereby systematically solving the problems of low control precision, safety and reliability deficiency caused by the fact that the traditional method cannot adapt to pressure change, environmental conditions and component aging. In an alternative embodiment, determining the reference control position of the throttle valve based on the target intake air amount and the operation data includes: According to the operation data, calculating boost control pressure and manifold control pressure; calculating an absolute target flow area based on the target intake air amount, the boost control pressure, and the manifold control pressure; the reference control position is determined based on the absolute target flow area. By dynamically calculating boost control pressure and manifold control pressure reflecting control intent and accurately calculating absolute target flow area based thereon, the present embodiment establishes a highly accurate, responsive feed-forward reference for throttle control. The method replaces the traditional method relying on fixed table lookup, and the dynamic accuracy and response speed of control are remarkably improved. In an alternative embodiment, calculating boost control pressure and manifold control pressure based on the operating data includes: Acquiring a first correction coefficient of a control deviation corresponding to the pre-calibrated air inlet flow; Acquiring a second correction coefficient corresponding to the rotation speed and the load of the pre-calibrated engine; Determining boost control pressure according to the real boost pressure measured in real time, the preset target boost pressure, the first correction coefficient and the second correction coefficient; Acquiring actual air inlet pressure of an air inlet manifold, preset target air inlet pressure and an air inlet pipe pressure deviation weight coefficient; and determining the manifold control pressure according to the actual air inlet pressure, the target air inlet pressure and the air inlet pipe pressure deviation weight coefficient. By the present embodiment, the first correction coefficient based on the intake air flow rate control devia