System and method for inhibiting regeneration of a diesel particulate filter

a technology of particulate filter and system, which is applied in the direction of electric control, machines/engines, mechanical equipment, etc., can solve the problems that the elevation of exhaust gas temperature for initiating “active” dpf regeneration may not always be appropriate for the manner, and affect the effectiveness of dpf.

Inactive Publication Date: 2007-11-29
INT ENGINE INTPROP CO LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010] The present invention is disclosed here in a system and method for inhibiting the passive regeneration strategy mentioned above. Principles of the present invention can however be applied to inhibiting other DPF regeneration strategies.

Problems solved by technology

Regeneration involves creating conditions that will burn off trapped particulates whose unchecked accumulation would otherwise impair DPF effectiveness.
However, elevation of exhaust gas temperature for initiating “active” DPF regeneration may not always be appropriate for the manner in which a vehicle is being operated.

Method used

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  • System and method for inhibiting regeneration of a diesel particulate filter
  • System and method for inhibiting regeneration of a diesel particulate filter
  • System and method for inhibiting regeneration of a diesel particulate filter

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Embodiment Construction

[0028]FIG. 1 shows a schematic diagram of an exemplary diesel engine 10 for powering a motor vehicle. Engine 10 has a processor-based engine control system (ECS) 12 that processes data from various sources to develop various control data for controlling various aspects of engine operation. The data processed by control system 12 may originate at external sources, such as sensors, and / or be generated internally.

[0029] Control system 12 controls the operation of electric-actuated fuel injectors 14 that inject fuel into engine combustion chambers 16. A processor of control system 12 can process data sufficiently fast to calculate, in real time, the timing and duration of injector actuation to set both the timing and the amount of fueling for main and post-injection.

[0030] Engine 10 further comprises an intake system 18 through which charge air enters combustion chambers 16, and an exhaust system 20 through which exhaust gases resulting from combustion leave the engine. Intake system ...

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Abstract

A system and method for initiation and control of passive regeneration (38) of a diesel particulate filter (34), and the integration of that regeneration strategy with an active regeneration strategy (36) and a strategy (40, 40A) for inhibiting passive regeneration. Passive regeneration can be initiated by driver actuation of an instrument panel device, such as a switch, while the vehicle is parked with the engine idling provided that certain conditions confirming that the vehicle is parked and the engine is at proper temperature are satisfied. Regeneration is inhibited by driver actuation of another switch for a maximum amount of time that may be shorter, or even prevented if DPF loading is too high.

Description

REFERENCE TO RELATED APPLICATIONS AND PRIORITY CLAIMS [0001] This application claims the priority of Provisional Application Nos. 60 / 780,535, and 60 / 780,586, both filed on 9 Mar. 2006.FIELD OF THE INVENTION [0002] This invention relates generally to emission control systems in motor vehicles, such as trucks, that are powered by internal combustion engines, more particularly diesel engines that have certain exhaust gas treatment devices for treating exhaust gases passing through their exhaust systems. The invention especially relates to a system and method for inhibiting regeneration of a diesel particulate filter (DPF) under certain conditions. BACKGROUND OF THE INVENTION [0003] A known system for treating exhaust gas passing through an exhaust system of a diesel engine comprises a diesel oxidation catalyst (DOC) associated with a diesel particulate filter (DPF). The combination of these two exhaust gas treatment devices promotes chemical reactions in exhaust gas and traps diesel pa...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01N3/00
CPCF01N3/106F01N9/002F01N2430/085F02B3/06F01N13/009F02D41/029F02M25/071Y02T10/47F02D41/024F02M26/07F02D2200/101F02D2200/604F02D41/405F02D41/08F02D41/0055F02D41/40Y02A50/20Y02T10/12Y02T10/40
Inventor BERKE, PAUL L.TYO, MATTHEW
Owner INT ENGINE INTPROP CO LLC
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