Unlock instant, AI-driven research and patent intelligence for your innovation.

SCR device

A urea, cylindrical technology, applied in the field of selective catalytic reduction device, can solve problems such as hindering exhaust flow and increasing exhaust back pressure

Active Publication Date: 2017-12-15
FORD GLOBAL TECH LLC
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These deposits can build up and block the flow of exhaust gas through the exhaust passages, thereby increasing exhaust back pressure

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
  • SCR device
  • SCR device
  • SCR device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The following description relates to systems and methods for flowing exhaust gas through an SCR device configured to store urea. The SCR device is positioned along the exhaust passage, as figure 1 shown in . The SCR device is cylindrical with a plurality of plates located therein, such as Figure 2A and Figure 2B shown in . The plate is physically coupled to a rotatable rod in the SCR device, wherein the plate divides the interior of the SCR device into compartments that are generally equal in volume to each other. The compartments are fluidly coupled to each other due to the plates being open to the exhaust flow. Thus, exhaust gas can flow from one compartment to another. In addition, exhaust gases can flow through the plates and evaporate the urea. The rod is rotatably coupled to a pair of bushings on opposite sides of the SCR device. Exhaust gas may flow into the SCR device and press against the surface of the plate causing the plate to rotate within the SCR ...

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

Methods and systems are provided for an SCR device configured to store an amount of urea. In one example, a system may include rotating a plurality of plates in the SCR as exhaust gas flows through the SCR.

Description

technical field [0001] The present invention generally relates to selective catalytic reduction (SCR) devices. Background technique [0002] One technology for aftertreatment of engine exhaust utilizes Selective Catalytic Reduction (SCR) to allow certain chemical reactions to the NO in the exhaust X (nitrogen oxides) and ammonia (NH 3 ) between. NH 3 Urea is introduced into the engine exhaust system upstream of the SCR device by injecting it into the exhaust passage, or is produced in the upstream catalyst. The urea decomposes entropically to NH under high temperature conditions 3 . The SCR facilitates the NH 3 and NO X The reaction between NH x converted to nitrogen (N 2 ) and water (H 2 O). However, as the inventors have recognized herein, problems can occur after injecting urea into the exhaust passage. In one example, urea can be poorly mixed into the exhaust flow (eg, a first portion of the exhaust flow has a higher urea concentration than a second portion o...

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
Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28F01N3/20F01N9/00
CPCF01N3/2066F01N3/208F01N3/28F01N9/00F01N3/2835F01N3/2892F01N2290/04F01N2610/02F01N2610/1453Y02T10/12
Inventor 张小钢
Owner FORD GLOBAL TECH LLC