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Automobile engine performance prediction and auxiliary calibration method and system

A technology for automotive engine and performance prediction, applied in special data processing applications, geometric CAD, design optimization/simulation, etc., can solve problems such as comprehensive analysis of unfavorable engines and limited model universality

Active Publication Date: 2020-09-11
SHANGHAI JIAO TONG UNIV
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AI Technical Summary

Problems solved by technology

Such parameter selection limits the universality of the model, and is not conducive to the comprehensive analysis of the factors affecting the performance of the engine

Method used

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  • Automobile engine performance prediction and auxiliary calibration method and system
  • Automobile engine performance prediction and auxiliary calibration method and system
  • Automobile engine performance prediction and auxiliary calibration method and system

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Embodiment 1

[0089] A kind of automobile engine performance prediction and auxiliary calibration method provided according to the present invention, comprising:

[0090] Step M1: collect the engine calibration experiment data, select the engine control parameters and the corresponding engine performance parameters to be studied;

[0091] Step M2: Establishing an active subspace prediction model according to the selected engine control parameters to be studied and the corresponding engine performance parameters;

[0092] Step M3: Bring the engine control parameters under the preset working conditions into the active subspace prediction model to obtain the predicted engine performance parameters, so as to achieve the effect of auxiliary calibration;

[0093] The active subspace prediction model is a model based on data dimension reduction, which reduces the dimension of complex databases, so that it can be fitted and modeled using a simpler method;

[0094] Specifically, the engine control pa...

Embodiment 2

[0162] Embodiment 2 is a modification of embodiment 1

[0163] The technical scheme adopted in the present invention is a method for predicting and assisting calibration of automobile engine performance based on active subspace, the method is as follows: figure 1 The following steps are shown:

[0164] (1) Collect the experimental data of the engine calibration, select the engine control parameters and the corresponding engine performance parameters to be studied;

[0165] In this example, the input parameters of the predictive model are intake timing (IVO), exhaust timing (EVO), engine speed (n), throttle opening (TO), air-fuel ratio (AFR), and turbocharging Intake pressure at the outlet of the device and the intake manifold (P TO , P IM ) and temperature (T TO ,T IM ). The input parameters and their range of variation are summarized in Table 1

[0166] Table 1

[0167]

[0168]

[0169] (2) Establish an active subspace prediction model based on existing experim...

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Abstract

The invention provides an automobile engine performance prediction and auxiliary calibration method and system, and the method comprises the steps: M1, collecting engine calibration experiment data, and selecting a researched engine control parameter and a corresponding engine performance expression parameter; M2, establishing an active subspace prediction model according to the selected researched engine control parameters and the corresponding engine performance expression parameters; and M3, substituting the engine control parameters under the preset working condition into the active subspace prediction model to obtain predicted engine performance expression parameters so as to achieve an auxiliary calibration effect, wherein the active subspace prediction model is a model based on datadimension reduction, and dimension reduction is carried out on a complex database. The active subspace model established by the invention can predict the operation condition of the engine to reduce the experimental workload on one hand, and can be used for sensitivity analysis of each control parameter of the engine to guide subsequent performance optimization work on the other hand.

Description

technical field [0001] The present invention relates to the field of intelligent calibration of automobile engines, in particular to an automobile engine performance prediction and auxiliary calibration method and system, and more specifically to an automobile engine performance parameter modeling method based on an active subspace method. Background technique [0002] In order to cope with increasingly stringent emission standards and meet higher power and economical requirements, modern engines are usually equipped with optimization technologies such as exhaust gas recirculation, turbocharging and variable valves. Under such a complex system, the adjustment of engine performance usually has a large degree of freedom, which brings hundreds of variable parameters to the calibration experiment. Therefore, it has become a realistic choice to optimize or simplify the analysis of engine calibration experiments with high experimental costs and time-consuming by means of simulatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/15
CPCG06F30/23G06F30/15
Inventor 韩东管程
Owner SHANGHAI JIAO TONG UNIV
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