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

System For Sensing Particulate Matter

A technology of particulate matter and exhaust system, applied in the direction of electronic control of exhaust treatment device, diagnostic device of exhaust treatment device, electrical control, etc., can solve the problem of poor mixing of exhaust pipe geometry, change the soot sensor readings etc.

Active Publication Date: 2017-12-08
FORD GLOBAL TECH LLC
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This could be due to exhaust pipe geometry and / or poor mixing of the exhaust
Additionally, large diesel particulates and / or water droplets may impact the face of the soot sensor, altering the soot sensor readings

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
  • System For Sensing Particulate Matter
  • System For Sensing Particulate Matter
  • System For Sensing Particulate Matter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The following description refers to sensing engine systems such as figure 1 Particulate matter (PM) in the exhaust stream of the engine system shown in . A PM sensor placed in an exhaust passage of an engine system may include a first outer tube and a second inner tube. The PM sensor element can be as in figure 2 is enclosed between the second inner tube and the first outer tube as shown in . The perforation of the second inner tube corresponds to the position of the PM sensor element such that exhaust gas received by the second inner tube through the concave protrusion flows out of the perforation directly towards the PM sensor element. The electrodes of the PM sensor element face the perforations and can become bridged as soot from the exhaust is deposited onto the sensor substrate of the PM sensor element. exist Figure 3A and 3B The cross-sections of the first outer tube, the second inner tube and the PM sensor element are shown in , respectively. exist Fig...

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 a particulate matter sensor. In one example, the sensor may include a concave inlet for admitting exhaust gas from an exhaust passage downstream of a particulate filter into the sensor.

Description

technical field [0001] The present application relates to sensing particulate matter in an exhaust system. Background technique [0002] Particulate matter filters are increasingly being used in automotive exhaust systems to reduce the concentration of particulates in engine exhaust. When soot builds up to a threshold level on the particulate filter, a filter regeneration process may be used to burn off the accumulated soot under controlled engine operating conditions. However, over time, such particulate filters can suffer an irreversible decrease in capture efficiency when the filter develops cracks due to uncontrolled temperature excursions during the filter regeneration process. Loss of capture efficiency of the particulate filter may result in increased particulate matter emissions well above the regulatory limit. [0003] Increasingly stringent particulate matter emission standards and proposed government-mandated on-board diagnostic (OBD) requirements for monitoring...

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): F01N11/00F01N3/023F01N9/00
CPCF01N3/023F01N9/002F01N11/00F01N2260/04F01N2560/05F02D41/1466F02D41/1494F02D41/0047F02D2041/228F02D2250/26G01N2015/0046G01N15/0606G01N15/0656F01N3/0275F01N13/008F02D41/029
Inventor 张小钢
Owner FORD GLOBAL TECH LLC