Invention Application
- Patent Title: SYSTEMS AND METHODS FOR REDUCING VEHICLE VALVE DEGRADATION
-
Application No.: US16188980Application Date: 2018-11-13
-
Publication No.: US20200149483A1Publication Date: 2020-05-14
- Inventor: Aed M. Dudar , Thomas Leone , Kenneth Miller
- Applicant: Ford Global Technologies, LLC
- Main IPC: F02D41/00
- IPC: F02D41/00 ; F02M25/08 ; B60K15/035

Abstract:
Methods and systems are provided for reducing degradation and issues related to noise, vibration and harshness (NVH) for a fuel tank pressure control valve configured to seal a fuel tank from atmosphere. In one example, a method may include depressurizing the fuel tank of a vehicle by duty cycling a tank pressure control valve and routing fuel vapors from the fuel tank to an engine, while controlling a timing of opening and closing events of the tank pressure control valve to coincide with pressure differences across the tank pressure control valve less than a threshold pressure difference in terms of pressure oscillations across the tank pressure control valve. In this way, higher loads and stress on the tank pressure control valve may be avoided, thus reducing degradation and NVH issues.
Public/Granted literature
- US10774761B2 Systems and methods for reducing vehicle valve degradation Public/Granted day:2020-09-15
Information query