A method and device for extracting order loads of engine torque excitation

By calculating the frequency domain indicator torque excitation and frequency domain inertia mass torque excitation in the engine cylinder and combining it into frequency domain torque excitation, the problem of insufficient extraction accuracy of engine torque excitation load in the prior art is solved, and a more accurate simulation analysis of in-vehicle vibration noise is achieved.

CN114462328BActive Publication Date: 2025-03-28DONGFENG LIUZHOU MOTOR
2 Cites 0 Cited by

Patent Information

Application Number
CN202210018841.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-01-07
Publication Date
2025-03-28
Estimated Expiration
2042-01-07

AI Technical Summary

Technical Problem

The prior art is difficult to accurately extract the internal vibration noise problems caused by engine torque excitation in simulation analysis, mainly because the load extraction accuracy and output form do not match the analysis model.

Method used

By acquiring the engine's geometric parameters and phase-adjusted in-cylinder pressure data, the frequency domain indicator torque excitation and frequency domain inertia mass torque excitation of each cylinder are calculated, combined into the frequency domain combined torque excitation, and the corresponding order load is superimposed to obtain the total order load of the engine torque excitation.

Benefits of technology

The order load acquisition accuracy of engine torque excitation is improved, the problem of matching load with the vehicle's NVH simulation analysis model is solved, and the accuracy of simulation analysis is enhanced.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The present invention discloses a method and device for extracting order loads of engine torque excitation, which obtains and calculates the frequency domain indicated torque excitation and frequency domain inertial mass torque excitation corresponding to each cylinder according to the geometric parameters of the engine and the in-cylinder pressure data of each cylinder of the engine after phase adjustment; obtains the frequency domain combined torque excitation corresponding to each cylinder according to the frequency domain indicated torque excitation and the frequency domain inertial mass torque excitation; and superimposes the order loads corresponding to the frequency domain combined torque excitation corresponding to each cylinder to obtain the total order load of the engine torque excitation. Compared with the prior art, the present invention improves the accuracy of the subsequent extracted order loads based on the in-cylinder pressure data of each cylinder after phase processing as the basis for calculation. At the same time, by extracting the order loads of the frequency domain combined torque excitation, the matching problem between the subsequent proposed order loads and the whole vehicle NVH simulation analysis model and analysis method is effectively solved.
Need to check novelty before this filing date? Find Prior Art