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Reducing Heating Of A Particulate Filter During A Regeneration Event

A particulate filter and particulate trap technology, which is applied in the direction of machines/engines, vehicle components, engine components, etc., and can solve problems such as particulate filter material combustion and thermal damage to surrounding components

Active Publication Date: 2017-12-08
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In extreme cases, this overheating condition can cause the particulate filter material to burn, which can lead to thermal damage to surrounding components

Method used

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  • Reducing Heating Of A Particulate Filter During A Regeneration Event
  • Reducing Heating Of A Particulate Filter During A Regeneration Event
  • Reducing Heating Of A Particulate Filter During A Regeneration Event

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] refer to figure 1 , shows a mild hybrid motor vehicle 5 with four wheels 6 , a direct injection diesel engine 10 and an electronic controller 20 .

[0039] The engine 10 is arranged to receive air through an air intake 11 and, although not shown, in most cases the airflow to the engine 10 is compressed by a supercharger or turbocharger before the airflow flows into the engine 10 In order to improve the efficiency of the engine 10 .

[0040] Exhaust from the engine 10 flows through a first or upstream portion 12 of the exhaust system to a particulate filter in the form of a diesel particulate filter (DPF) 15 and after passing through the DPF 15 the exhaust passes through a second part of the exhaust system. Or the downstream portion 13 flows out to atmosphere.

[0041] It should be understood that other emission control devices or noise suppression devices may be present in the gas flow path from engine 10 to the point where the gas flow exits to atmosphere.

[0042] ...

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PUM

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Abstract

A method is disclosed for reducing the heating of a particulate filter 15, eg a DPF, during a regeneration event when the engine 10, eg a diesel engine of a mild hybrid vehicle, is decelerating due to an accelerator pedal tip-out (deceleration fuel cut-off event). The method comprises using an electric machine 16, eg an integrated starter / generator, to apply a load to the engine 10 by charging the battery 17, and compensating for the increase in applied load by increasing an engine torque demand thereby requiring fuel to be supplied to the engine 10. The fuel flow reduces the concentration of oxygen in the exhaust gas thereby reducing the intensity of soot combustion within the particulate filter 15 and reducing the peak temperature within the particulate filter 15 during the regeneration event.

Description

technical field [0001] The present invention relates to a particulate filter arranged to receive exhaust gas from an engine of a motor vehicle, and in particular to a method of protecting the particulate filter from overheating during a regeneration event when the engine decelerates due to tip-out. Background technique [0002] It is well known to provide a particulate filter (Particulate Filter, PF) in the exhaust system of an engine to filter soot particles from the exhaust gas flowing from the engine to the atmosphere. When the engine is a diesel engine, this particulate filter is often referred to as a Diesel Particulate Filter or "DPF". [0003] In a so-called "deceleration fuel cutoff" condition, where fuel to the vehicle's engine is cut off during a tip-out event to save fuel during vehicle deceleration, the particulate filter (PF) may become damaged. If the fuel supply to the engine is cut off while the soot combustion process known as a "regeneration event" is acti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/023F01N11/00
CPCF01N3/023F01N11/005F01N9/002F01N2240/04F01N2260/04F01N2430/06F01N2900/08F01N2900/104F02D41/029F02D2041/026F02D2200/0802Y02T10/40B60W2510/0604B60W2510/244B60W2530/12B60W2540/10B60Y2300/476F01N2430/00
Inventor 阿西施·库马尔·奈杜彼得·乔治·布里特
Owner FORD GLOBAL TECH LLC
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