Cylinder exhaust gas recirculation distribution measurement system and method
By connecting the engine intake air passage to a vacuum pump, the vacuum pump actively draws intake air to the gas composition sensor, solving the problem of transport delay in the EGR distribution measurement system. This enables rapid and accurate EGR concentration measurement, improving system efficiency and development speed.
CN110159458BActive Publication Date: 2026-07-21FORD GLOBAL TECH LLC
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- FORD GLOBAL TECH LLC
- Filing Date
- 2019-02-11
- Publication Date
- 2026-07-21
AI Technical Summary
Technical Problem
Existing EGR distribution measurement systems suffer from low speed and efficiency due to transportation and analysis time delays in the process of transferring intake air from the engine to an external gas analyzer. Furthermore, the development and validation process is laborious and expensive.
Method used
By fluidly connecting the engine's intake air passage to a vacuum pump, the vacuum pump actively draws intake air to a gas composition sensor to estimate the EGR concentration of the intake air, enabling rapid sampling of the intake air passages of multiple cylinders and shortening the testing time.
Benefits of technology
It improves the speed of EGR system development and verification, reduces testing time, and improves the efficiency and accuracy of measurement systems.
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Smart Images
Figure CN110159458B_ABST
Abstract
The present disclosure provides "Cylinder Exhaust Gas Recirculation Distribution Measurement Systems and Methods". Methods and systems for measuring exhaust gas recirculation (EGR) distribution between individual engine cylinders are provided. In one example, a method can include fluidically coupling a plurality of intake runners of an engine to a vacuum pump; diverting, with the vacuum pump, a portion of an intake charge from the intake runners to a gas composition sensor; measuring, with the gas composition sensor, an oxygen concentration of the diverted intake charge portion; and estimating an EGR concentration of the intake charge based on the measured oxygen concentration.
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