Systems and methods for diagnosing a vehicle fuel system and evaporative emission control system
Adaptive EONV testing in vehicle fuel systems initiates with a vacuum phase based on test probability, addressing false positives and power consumption issues, enhancing efficiency and accuracy.
DE102018118855B4Active Publication Date: 2026-05-28FORD GLOBAL TECH LLC
Patent Information
- Application Number
- DE102018118855
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2017-08-07
- Filing Date
- 2018-08-02
- Publication Date
- 2026-05-28
- Estimated Expiration
- 2038-08-02
Smart Images
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Abstract
Procedure, comprehensive: Setting an initial venting time for a natural vacuum with engine off (EONV) test for a vehicle based on a set of EONV test results received from a plurality of other vehicles; Commencing the natural vacuum test with the engine off, including a vacuum phase section, if, based on the set of EONV test results received from the majority of other vehicles, it is determined that the vehicle can survive the vacuum phase section; and Starting the EONV test with a pressure phase section if, based on the series of EONV test results received from the majority of other vehicles, it is determined that the vehicle can pass during the pressure phase section.
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Citation Information
Patent Citations
Automotive Fuel System Leak Testing
US20110139130A1
System and methods for reducing vehicle evaporative emissions
US20170198671A1