Methods, devices, equipment and media for detecting abnormalities in hydraulic systems

CN117553053BActive Publication Date: 2026-05-26SAIC MOTOR

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: SAIC MOTOR
Filing Date: 2022-08-05
Publication Date: 2026-05-26

AI Technical Summary

Technical Problem

Existing technology cannot accurately determine the specific cause of abnormalities in the hydraulic system, resulting in an inability to address the problem effectively and protect the transmission.

Method used

By obtaining the pressure difference between the main oil pressure sensed by the hydraulic system and the preset oil pressure, the control current is adjusted to distinguish between sensor malfunctions and hydraulic system malfunctions. The specific judgment method includes obtaining the second sensing oil pressure after adjusting the control current, and determining the malfunction type based on the pressure difference.

Benefits of technology

It enables accurate determination of whether the abnormality is due to a sensor malfunction or a hydraulic system malfunction when the hydraulic system malfunctions, thereby allowing for targeted handling and protecting the normal operation of the transmission.

✦ Generated by Eureka AI based on patent content.

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Abstract

This application provides a method, apparatus, device, and medium for detecting abnormalities in a hydraulic system. The method acquires a first sensing main hydraulic pressure of the hydraulic system. When the pressure difference between the first sensing main hydraulic pressure and a preset main hydraulic pressure exceeds a first preset threshold, the control current is adjusted according to the preset main hydraulic pressure. If the first sensing main hydraulic pressure is higher than the preset main hydraulic pressure, after adjusting the control current, a second sensing main hydraulic pressure and a sensing secondary hydraulic pressure of the hydraulic system are acquired. When the pressure difference between the sensing secondary hydraulic pressure and a preset secondary hydraulic pressure exceeds a second preset threshold, a sensor malfunction is determined. When the pressure difference between the sensing secondary hydraulic pressure and the preset secondary hydraulic pressure does not exceed the second preset threshold and the pressure difference between the second sensing main hydraulic pressure and the preset main hydraulic pressure decreases, a hydraulic system malfunction is determined. This allows for more accurate determination of whether the malfunction is due to a sensor or the hydraulic system itself, enabling appropriate handling.

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