Dynamic fuel cut identification method for engine

The method addresses the challenge of identifying dynamic fuel cut-off in engines by calculating cylinder running times and using self-learning correction coefficients, ensuring timely maintenance and engine protection.

CN119102905AActive Publication Date: 2024-12-10DONGFENG MOTOR GRP
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Patent Information

Application Number
CN202411231958.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-04
Publication Date
2024-12-10
Estimated Expiration
2044-09-04

AI Technical Summary

Technical Problem

Existing engine control systems fail to promptly identify dynamic fuel cut-off, leading to adverse consequences on power, emissions, and economy, necessitating a method to detect fixed cylinder fuel cut-off for timely maintenance.

Method used

A method involving the calculation of average running time of engine cylinders, division of evaluation areas based on engine speed, and application of self-learning correction coefficients to determine the presence of fixed cylinder fuel cut-off.

Benefits of technology

Enables real-time identification of dynamic fuel cut-off, ensuring timely maintenance and protection of the engine by accurately detecting continuous misfire in engine cylinders.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses an engine dynamic fuel cut identification method, which comprises the following steps of: when enabling conditions of an engine dynamic fuel cut verification method are met, acquiring operation time of each cylinder of an engine at a section of crankshaft operation angle, and calculating an average value of the operation time; determining a running time updating coefficient under the condition that the running time updating optimization processing activation condition is met; determining the value of a flag bit; determining the final operation time according to the value of the flag bit and the operation time updating coefficient, and solving the average value and the characteristic coefficient of the final operation time; determining the value of an initial flag bit of the fixed cylinder according to the characteristic coefficient and the self-learning correction coefficient; and determining the value of a final flag bit of the fixed cylinder according to the value of the initial flag bit, and judging whether the fixed cylinder has real fuel cut-off. The method provided by the invention can detect whether the fixed cylinder of the engine is cut off, so that a driver is reminded of timely maintenance and detection, and the engine is protected.
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Citation Information

Patent Citations

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