Gas leakage detection method and gas leakage detection system of engine exhaust gas recirculation system
By monitoring the engine boost pressure difference and the gas conditions in the pipeline, the leakage location of the exhaust gas recirculation system is accurately located, which solves the problem that existing detection methods cannot accurately locate, and improves detection accuracy and maintenance efficiency.
CN119333318AActive Publication Date: 2025-01-21WEICHAI POWER CO LTD
Patent Information
- Application Number
- CN202411228443.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2044-09-03
AI Technical Summary
Technical Problem
The existing exhaust gas recirculation system leak detection methods cannot accurately locate the leak position, resulting in inconvenient maintenance work.
Method used
By monitoring the difference between the engine's actual boost pressure and the required boost pressure, combined with the switching status of the EGR valve and the gas flow and reverse flow conditions in the exhaust gas recirculation pipeline, the specific location of the air leakage is determined.
Benefits of technology
It improves the accuracy of air leak detection, helps quickly locate air leaks, reduces unnecessary disassembly and inspection, and saves time and costs.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN119333318A_ABST
Abstract
The invention belongs to the technical field of engines, and particularly relates to a gas leakage detection method and system for an engine exhaust gas recirculation system, and the method comprises the following steps: determining whether a detection unit works normally or not; according to normal work of the detection unit, the condition that the engine is under the preset load working condition, the supercharger is in the working state, and the EGR valve is in the open state, the relation between the actual supercharging pressure of the engine and the required supercharging pressure of the engine is judged; closing the EGR valve according to the fact that the actual boost pressure is lower than the required boost pressure and the difference value between the actual boost pressure and the required boost pressure is larger than a preset deviation value, and determining that gas leakage occurs on the gas inlet pipeline according to the fact that the flow of gas in the exhaust gas recirculation pipeline is zero; and determining that gas leakage occurs on the exhaust gas recirculation pipeline according to gas backflow occurring in the exhaust gas recirculation pipeline. According to the air leakage detection method of the engine exhaust gas recirculation system, the air leakage position can be determined, the later maintenance efficiency can be improved, and operation is convenient.
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Citation Information
Patent Citations
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