EXHAUST TREATMENT DEVICE INSULATION DETECTION SYSTEM

摘要

An exhaust after-treatment system including an exhaust passage having at least a first portion and a second portion. An exhaust treatment component may be positioned within the exhaust passage between the first and second portions, and an insulating blanket insulates each of the first portion, second portion, and the exhaust treatment component. Temperature sensors may be positioned at the first portion, the second portion, the exhaust treatment component, wherein each sensor monitors the temperature at its location. A controller may have access to temperature data associated with an insulated exhaust after-treatment system, and the controller compares the monitored temperatures to the temperature data to determine whether a difference exceeding a predetermined threshold exists. If the difference exceeds a predetermined threshold, the controller outputs an error signal identifying particular portions of the exhaust system that are no longer insulated.

主权项

1. An exhaust after-treatment system for treating an exhaust produced by an engine, comprising:
an exhaust passage that is operable to receive the exhaust produced by the engine, the exhaust passage including at least a first portion and a second portion; an exhaust treatment component positioned within the exhaust passage between the first and second portions; an insulating blanket operable to insulate each of the first portion, second portion, and the exhaust treatment component; a first temperature sensor positioned at the first portion, a second temperature sensor positioned at the second portion, and a third temperature sensor positioned at the exhaust treatment component, wherein each sensor outputs a signal indicative of the temperature at its location; and a controller in receipt of the signals output by the temperature sensors and having access to temperature data associated with an insulated exhaust after-treatment system, wherein the controller compares the signals indicative of temperature to the temperature data and determines whether a difference exceeding a predetermined threshold exists, the controller outputting an error signal identifying particular portions of the exhaust system that are no longer insulated based on the difference determination.