Parameter calibration method, device and equipment and storage medium

A parameter calibration and data technology, applied in the direction of internal combustion engine testing, etc., can solve the problems of unable to fix the working state of the engine, poor robustness of calibration results, waste of human resources and material resources, etc., to reduce the difficulty and cost of calibration, and improve the quality of calibration and the effect of calibration efficiency

Active Publication Date: 2020-12-29
CHINA FIRST AUTOMOBILE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The parameter calibration of the dynamic exhaust temperature model on the actual road is a complex calibration process of repeated iterative testing and repeated optimization, which greatly wastes human and material resources, and it is impossible to fix the engine working state to the value of the map grid point, resulting in Calibration results are poor in robustness

Method used

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  • Parameter calibration method, device and equipment and storage medium
  • Parameter calibration method, device and equipment and storage medium
  • Parameter calibration method, device and equipment and storage medium

Examples

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Embodiment 1

[0044] Figure 4 It is a flowchart of a parameter calibration method provided by Embodiment 1 of the present invention. This embodiment is applicable to the parameter calibration of the dynamic exhaust temperature model of the vehicle exhaust system. This method can be implemented by the parameter calibration device in the embodiment of the present invention To execute, the device may be implemented in software and / or hardware. The parameter calibration method provided in this embodiment specifically includes the following steps:

[0045] Step 110 , perform a step test of the engine intake mass flow rate by means of a chassis dynamometer.

[0046] Among them, the chassis dynamometer is an indoor bench test equipment used to test the performance of automobile power, multi-working condition emission indicators, and fuel indicators. The automobile chassis dynamometer simulates the road surface through the roller, calculates the road simulation equation, and simulates with the l...

Embodiment 2

[0071] Figure 5 It is a flow chart of an air intake mass flow step test method provided in Embodiment 2 of the present invention. This embodiment is based on the above embodiment, and specific optimization is carried out. 1. The first throttle opening threshold and the second throttle opening threshold are used to carry out the engine intake mass flow step test, which is optimized as: controlling the engine to work at a preset speed through the chassis dynamometer; controlling the throttle The pedal opening reaches the first accelerator opening threshold; if the variation range of the actual exhaust gas temperature is within the first preset temperature range, the accelerator pedal opening is controlled to reach the second accelerator opening threshold. For technical details not exhaustively described in this embodiment, reference may be made to any of the foregoing embodiments.

[0072] Specifically, refer to Figure 5 , the intake mass flow step test method specifically i...

Embodiment 3

[0089] Figure 6 It is a flow chart of a method for calibrating map parameters provided by Embodiment 3 of the present invention. This embodiment is based on the above-mentioned embodiments, and specific optimization is carried out. Based on the actual temperature data and all the input data, the Calibrate the map parameters of the dynamic exhaust temperature model, and optimize as follows: input all the input data into the dynamic exhaust temperature model; adjust the delay in the calibration map of the dynamic exhaust temperature model based on the actual temperature data filter coefficient. For technical details not exhaustively described in this embodiment, reference may be made to any of the foregoing embodiments.

[0090] Specifically, refer to Figure 6 , the map parameter calibration method specifically includes the following steps:

[0091] Step 310, input all the input data into the dynamic exhaust temperature model.

[0092] Step 320, adjusting the delay filter ...

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Abstract

The embodiment of the invention discloses a parameter calibration method, device and equipment and a storage medium. The parameter calibration method comprises the steps that an engine air inlet massflow step test is carried out through a chassis dynamometer; actual temperature data of an exhaust system and all input data of a dynamic exhaust temperature model in the engine air inlet mass flow step test process are acquired; and pulse spectrum parameters of the dynamic exhaust temperature model are calibrated based on the actual temperature data and all the input data. According to the technical scheme provided by the embodiment of the invention, the engine air inlet mass flow step test is carried out through the chassis dynamometer; and the engine is accurately controlled to step from aworking state to a pulse spectrum grid point value in real time, repeated iterative testing is not needed, the calibration difficulty and the calibration cost of the dynamic exhaust temperature modelof the exhaust system are reduced, and the calibration quality and the calibration efficiency are improved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of vehicle calibration, and in particular to a parameter calibration method, device, equipment and storage medium. Background technique [0002] The exhaust temperature model in the vehicle engine controller can calculate the temperature of the exhaust system in real time according to the operating status of the vehicle engine. When the exhaust temperature model calculates that the temperature of the exhaust system is close to its designed allowable temperature, the zero The component protection mechanism is enhanced, and strategies are actively adopted to control the exhaust temperature to prevent vehicle damage. The exhaust temperature model in the vehicle engine controller is mainly composed of two parts, one is a steady-state exhaust temperature model, and the other is a dynamic exhaust temperature model. The dynamic exhaust temperature model is used to calculate the real-time t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/05
CPCG01M15/05Y02T10/40
Inventor 苏海龙陈国栋任亚为王昊武斐王谋举路汉文任星杨才钰
Owner CHINA FIRST AUTOMOBILE
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