Method for vehicle emission control

A technology of exhaust passage and exhaust temperature, applied in electrical control, engine control, fuel injection control, etc., can solve problems such as long-term warm-up and inability to detect stoichiometric exhaust.

Pending Publication Date: 2020-12-29
FORD GLOBAL TECH LLC
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a fourth example, HC sensors may be substantially incapable of detecting emissions in stoichiometric exhaust (eg, oxygen deficient exhaust) and may require a long warm-up (which precludes use immediately after a cold engine start)

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
  • Method for vehicle emission control
  • Method for vehicle emission control
  • Method for vehicle emission control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The following description refers to the ammonia (NH 3 ) Method of diagnosing a hydrocarbon (HC) trap. The HC trap can be an engine exhaust treatment system such as figure 1 Components of the engine system shown in ). The engine's controller can be configured to execute one or more programs, such as figure 2 An example procedure to diagnose the HC trap after a cold engine start. Such as image 3 During certain exhaust conditions after an engine cold start, the first exemplary HC trap monitors or passive nitrogen oxides (NO x ) monitoring can be done via the NO x Sensors timely determine NH 3 quantity. Such as Figure 4 shown in, the second exemplary HC trap monitors or actively NO x monitoring may provide a target exhaust air-fuel ratio pulse, and subsequently via one or more NO x The sensor determines the NH produced 3 quantity. Such as Figure 5 A third exemplary HC trap monitor or heated exhaust gas oxygen (HEGO) monitor utilizes the output of the HEGO s...

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

A method for vehicle emission control is provided. In one example, a method for an engine may include indicating degradation of a hydrocarbon trap based on an amount of NH3 in exhaust gas in responseto satisfying a plurality of diagnostic entry conditions. In some examples, the NH3 amount may be determined based on one or more NOx sensor outputs. In some examples, the plurality of diagnostic entry conditions may include that the engine has been in operation immediately after an engine cold start for an initial duration. When the NH3 amount is determined from the one or more NOx sensor outputs, conditions of the exhaust gas after cold start of the engine may be utilized in good time. In some examples, a predetermined air-fuel ratio may actively provide the exhaust gas to satisfy at least one of the plurality of diagnostic entry conditions.

Description

technical field [0001] The present description generally relates to methods for controlling exhaust emissions based on the presence of ammonia in exhaust emissions from a vehicle. Background technique [0002] Regulations on vehicle emissions are trending toward stricter policies aimed at mitigating chemical compounds that can cause damage to macro-ecosystems and the global climate. To address such regulations, component catalysts of exhaust treatment systems may be developed to mitigate one or more of these potentially problematic chemicals in conjunction with other component catalysts of the exhaust treatment system. As an example, nitrogen oxides (NO x ), hydrocarbon (HC) and carbon monoxide (CO) emissions. [0003] For example, an HC trap may be employed to trap at least HC emissions in the exhaust stream during conditions where other component catalysts may not have reached appropriate light-off temperatures (e.g., immediately after a cold engine start) . When the e...

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): F01N11/00F01N3/08F01N3/10F01N9/00F02D41/14
CPCF01N11/00F01N11/002F01N3/0814F01N3/101F01N9/00F02D41/1454F01N2560/026F01N2560/06F01N2370/04F01N3/0835F01N2560/021F02D41/064F01N3/208F01N3/0807F01N2900/1404F01N2900/1402F01N2560/14Y02A50/20Y02T10/12Y02T10/40F01N11/007F02D41/025F01N2430/06F01N2570/12
Inventor 詹森·亚伦·卢佩斯库迈克尔·詹姆斯·乌里奇
Owner FORD GLOBAL TECH LLC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap