Hybrid vehicle parking power generation working condition noise vibration control method, system and vehicle

By setting the engine operating speed range and modal frequency avoidance design during the project initiation stage, the noise and vibration problem under the parking power generation condition of hybrid vehicles was solved, realizing noise and vibration control in all scenarios, avoiding the development risks of high cost and long cycle, and improving the NVH performance of the vehicle.

CN122232613APending Publication Date: 2026-06-19JIANGLING MOTORS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGLING MOTORS
Filing Date
2026-05-14
Publication Date
2026-06-19

AI Technical Summary

⚠Technical Problem

Hybrid vehicles exhibit significant noise and vibration issues when generating electricity while parked. These issues are easily coupled with the vehicle's steering system and internal acoustic cavities, resulting in harsh powertrain noise, noticeable low-frequency pyridine, and significant steering wheel vibration. Existing technologies lack systematic control methods, leading to high development costs, long development cycles, and significant risks in production.

⚗Method used

By setting the engine operating speed range during the project initiation stage, calculating the main excitation frequency range, and performing modal frequency avoidance forward design, modal frequency avoidance optimization is carried out on key subsystem components, a finite element simulation model of vehicle noise and vibration is established, the optimal engine speed and torque are determined, and corrections are made in combination with environmental information to achieve noise and vibration control in all scenarios.

🎯Benefits of technology

Modal frequency avoidance design was completed through simulation in the early stages of the project, avoiding high costs and long cycles caused by modal coupling problems in the later stages. This enabled noise and vibration control in all scenarios, improved the vehicle's NVH performance and user experience, and reduced development risks.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention provides a method, system, and vehicle for noise and vibration control during parking and power generation in hybrid vehicles. The method includes obtaining the target power requirement for parking and power generation, and setting the engine operating speed range based on the engine's multi-dimensional performance indicators; calculating the main excitation frequency range of the engine within the operating speed range, and using this excitation frequency range as the modal frequency avoidance target range; performing modal frequency avoidance forward design on key subsystem components of the vehicle using the modal frequency avoidance target range as a constraint; and conducting an equal power speed scanning test on a physical prototype vehicle within the engine operating speed range, based on the target power requirement, to collect noise and vibration performance data of the entire vehicle, and determining the engine speed and corresponding torque with the optimal overall noise and vibration performance based on preset performance indicator priorities, as the optimal operating point for parking and power generation, thus avoiding modal coupling problems in the later stages of development.
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