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Vehicle oxidation catalyst efficiency model for adaptive control and diagnostics

An oxidation catalyst, vehicle technology, applied in the direction of machines/engines, electronic control of exhaust treatment devices, mechanical equipment, etc., can solve problems such as increasing filter pressure difference

Inactive Publication Date: 2012-03-14
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, over time, the particulate matter builds up in the filter media, which gradually increases the pressure differential across the filter

Method used

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  • Vehicle oxidation catalyst efficiency model for adaptive control and diagnostics
  • Vehicle oxidation catalyst efficiency model for adaptive control and diagnostics
  • Vehicle oxidation catalyst efficiency model for adaptive control and diagnostics

Examples

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Embodiment Construction

[0011] Referring to the drawings, wherein the same reference numerals in the several drawings correspond to the same or similar components, figure 1 A vehicle 10 is schematically shown in . The vehicle 10 includes a host computer 40 and a diagnostic algorithm 100 that is selectively executed by the host computer 40 to calculate the actual conversion efficiency of an oxidation control (OC) system 13 onboard the vehicle 10 . The host computer 40 can thus be used to calculate, evaluate and control the actual level of hydrocarbons ultimately emitted by the vehicle 10 into the surrounding atmosphere, which can be achieved by using the referenced figure 2 The temperature model 50 described in more detail is completed in part.

[0012] The vehicle 10 includes an internal combustion engine 12 such as a diesel engine or a direct injection gasoline engine, an OC system 13 and a transmission 14 . The engine 12 combusts fuel 16 drawn from a fuel tank 18 . In one possible embodiment, t...

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Abstract

A vehicle includes a fuel tank, an internal combustion engine, an oxidation catalyst, a regenerable particulate filter in fluid communication with an outlet side of the oxidation catalyst, and a host machine. The host machine calculates an actual hydrocarbon level in the exhaust stream downstream of the particulate filter as a function of an actual energy input value and an actual output value of the oxidation catalyst, and subsequently executes a control action using the actual hydrocarbon level. A method for use aboard the vehicle includes using the host machine to calculate an actual hydrocarbon level in the exhaust stream downstream of the particulate filter, including solving a function of an actual energy input value and an actual energy output value of the oxidation catalyst, and executing a control action aboard the vehicle via the host machine using the actual hydrocarbon level.

Description

technical field [0001] The present invention relates to oxidation catalyst systems for use on vehicles. Background technique [0002] Particulate filters capture and retain other microscopic particles of soot, ash, metals and suspended matter produced during the combustion of fuel in a vehicle. However, over time, the particulate matter builds up in the filter media, which gradually increases the pressure differential across the filter. To extend filter life and optimize engine functionality, some particulate filters can be regenerated with heat, which can be temporarily raised to 450°C or higher by injecting fuel into the exhaust stream upstream of the filter. This heat peak is used in combination with a suitable catalyst, such as palladium or platinum, which decomposes the accumulated and suspended material into relatively inert by-products via a simple exothermic oxidation process. Contents of the invention [0003] A vehicle disclosed herein includes an internal comb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N9/00
CPCF01N3/103F01N3/2066F01N9/002F01N9/005F01N2250/02F01N2560/06F01N2560/14F01N2610/03F01N13/009F01N3/0253Y02A50/20Y02T10/12Y02T10/40F01N13/02
Inventor P.巴拉萨S.A.道格拉斯J.D.马林斯
Owner GM GLOBAL TECH OPERATIONS LLC
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