Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Systems and methods for improving vehicle engine stability

An engine and stability technology, applied in engine control, engine components, machine/engine, etc., to solve problems such as increasing decompression time

Pending Publication Date: 2020-07-24
FORD GLOBAL TECH LLC
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While such actions may avoid engine lag and / or stall, such actions may interrupt purging and / or fuel tank pressure control, which may result in increased depressurization times in response to refueling requests and / or due to fuel vapor canister Undesirable increase in evaporative emissions due to inefficient extraction of

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Systems and methods for improving vehicle engine stability
  • Systems and methods for improving vehicle engine stability
  • Systems and methods for improving vehicle engine stability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The following description relates to systems and methods for performing tank pressure control operations (also referred to herein as tank pressure control or TPC operations). In particular, such systems and methods relate to conducting TPC operations that can continue without having to abort. More specifically, for such TPC operation, fuel tank vapors may be directed along a first flow path that includes vapors being directed through a portion of the fuel vapor canister (eg, buffer zone) and then to the engine, provided that is a condition that does not indicate degraded engine stability. However, in response to such indications of degraded engine stability, the fuel vapors may then be redirected along a second flow path that includes the vapors being directed through the entire fuel vapor filter before being directed to the engine. Can. Such systems and methods are useful for hybrid electric vehicles with limited engine run time, such as figure 1 The depicted hybri...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Systems and methods for improving vehicle engine stability. Methods and systems are provided for depressurizing a fuel tank of a vehicle by routing fuel tank vapors to an engine for combustion. In oneexample, a method may include reducing a pressure in the fuel tank by routing vapors from the fuel tank through a portion of a fuel vapor storage canister and, in response to an indication of a condition of degraded engine stability, re-routing the vapors from the fuel tank through an entirety of the fuel vapor storage canister. In this way, under conditions of degraded engine stability, a rate at which fuel tank vapors are directed to the engine may be reduced, which may thus mitigate the condition of degraded engine stability without aborting the operation to reduce the fuel tank pressure.

Description

technical field [0001] The present specification generally relates to methods and systems for controlling the amount of fuel vapors introduced into a vehicle engine from a fuel tank and a fuel vapor storage canister in response to an indication of a degraded engine stability condition. Background technique [0002] Vehicle emission control systems may be configured to store refueling vapors, and in some instances operating loss vapors and diurnal emissions, in a fuel vapor canister and then purge the stored vapors during subsequent engine operation. The stored vapors can be directed to the engine intake for combustion, further improving the vehicle's fuel economy. During a typical canister purge operation, the canister purge (CPV) coupled between the engine intake and the fuel vapor canister is opened or duty cycled, allowing intake manifold vacuum to be applied to the fuel vapor canister. Fresh air can be drawn in through the fuel vapor canister via the open canister vent...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F02D41/00F02M25/08
CPCF02D41/004F02M25/08F02M25/0836F02D29/02F02D41/0032F02D41/0035F02M25/0827F02M25/0854F02D2200/02
Inventor 艾德·杜道尔
Owner FORD GLOBAL TECH LLC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com