Method and system for detecting the working state of a methanol vapor adsorption device based on negative pressure scavenging

By using a methanol vapor adsorption device based on negative pressure scavenging, the adsorption and desorption processes of methanol vapor are monitored in real time, solving the problem of methanol vapor corrosion. This enables quantitative monitoring and efficient desorption of the adsorption device, improving engine reliability and fuel efficiency.

CN122215946APending Publication Date: 2026-06-16GUANGXI YUCHAI MASCH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGXI YUCHAI MASCH CO LTD
Filing Date
2026-04-30
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

In existing methanol engines, residual methanol vapor after shutdown can easily corrode cylinder liners. Furthermore, existing carbon canister desorption solutions lack real-time detection and quantitative evaluation, leading to decreased adsorption efficiency or failure, and the desorption process is incomplete.

Method used

A methanol vapor adsorption device based on negative pressure scavenging is adopted. Methanol vapor is drawn into the activated carbon tank by a vacuum pump. The cumulative adsorption amount is calculated in real time and a desorption trigger signal is generated. Desorption is carried out in combination with a negative pressure environment with medium and high speed operation. The pressure is balanced by an air filter and the desorption process is monitored in real time.

Benefits of technology

It enables quantitative monitoring of the adsorption unit, avoids methanol vapor leakage caused by adsorption saturation, improves the reliability and safety of the adsorption unit, enhances desorption efficiency and system economy, and provides multi-dimensional assessment of operating status.

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Abstract

The application provides a working state detection method and system of a methanol vapor adsorption device based on negative pressure scavenging, and relates to the technical field of methanol engines.The method comprises the following steps: judging whether the desorption of an activated carbon tank is completed according to the desorption state data, continuing the desorption and recording the desorption time if the desorption is not completed, closing an electromagnetic valve and stopping the desorption if the desorption is completed, and generating a judgment result that the working state of the adsorption device is normal; and comprehensively evaluating the adsorption efficiency and the desorption efficiency of the adsorption device according to the adsorption time, the desorption time and the desorption completion condition, and outputting a working state detection result.The application can accurately detect the working state of the methanol vapor adsorption device, and realizes quantitative judgment of the adsorption saturation and evaluation of the desorption effect.
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