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Method and system for gasoline particulate filter operations

A particulate filter and filter technology, which is applied to the electrical control and electrical control of machines/engines and exhaust treatment devices, and can solve problems such as low-efficiency exhaust emissions

Active Publication Date: 2018-01-23
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the level of soot remaining on the filter after engine cold start regeneration can lead to inefficient exhaust emissions during subsequent engine idle conditions

Method used

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  • Method and system for gasoline particulate filter operations
  • Method and system for gasoline particulate filter operations
  • Method and system for gasoline particulate filter operations

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Embodiment Construction

[0012] The following description relates to a system and method for maintaining a target soot level at a gasoline particulate filter (GPF) based on current engine operating conditions in order to improve emission quality. Gasoline particulate filters with lower filtration capacity can be used in engine systems, such as figure 1 shown in . The engine controller can be configured to execute control programs such as figure 2 An example routine to adjust one or more engine operating parameters to maintain desired soot and ash levels at the GPF as determined by the controller. image 3 An example of such adjustments to maintain desired soot and ash levels is shown in .

[0013] figure 1 An example embodiment of a combustion chamber or cylinder of internal combustion engine 10 is shown. Engine 10 may be controlled at least in part by a control system including controller 12 and input from a vehicle operator 130 via input device 132 . In this example, input device 132 includes ...

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Abstract

The present invention relates to a method and system for gasoline particulate filter operations. Methods and systems are provided for optimal operation of a gasoline particulate filter coupled to an engine exhaust system. Based on engine operating conditions, a target soot level on the GPF may be determined, and one or more engine operating parameters may be adjusted to maintain the actual GPF soot level at the target level. In one example, if the actual GPF soot level is lower than the target level, one or more of a fuel injection timing and a fuel rail pressure may be adjusted to increase soot generation, and if the actual GPF soot level is higher than the target level, the GPF may be regenerated until the actual soot level reaches the target level.

Description

technical field [0001] The present invention relates generally to methods and systems for gasoline particulate filters coupled in engine exhaust. Background technique [0002] Engine combustion using gasoline fuel can produce particulate matter (PM) such as soot and aerosols that can be emitted into the atmosphere. To achieve emission compliance, a gasoline particulate filter (GPF) may be included in the engine exhaust to filter out exhaust PM before expelling the exhaust to the atmosphere. A higher efficiency GPF including denser filter meshes may be used for improved emission quality especially during cold start conditions. [0003] In order to maintain the efficiency of the exhaust system particulate filter, it may be necessary to regenerate the filter intermittently. One example method is shown in US Patent 9,027,333 by Neely et al., to regenerate a diesel particulate filter (DPF) in response to a soot level above a threshold. Specifically, regeneration is controlled ...

Claims

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Application Information

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IPC IPC(8): F01N3/025F02D21/08
CPCF01N3/021F01N9/00F01N2430/08F01N2900/08F01N2900/1404F01N2900/1606F02D41/0235F02D41/029F02D41/3836F02D41/401F02D2200/021F02D2200/0812Y02T10/12Y02T10/40F01N3/023F01N2900/1602
Inventor N·苏克塔J·A·林伯纳M·J·范纽斯塔特J·E·赫奇斯
Owner FORD GLOBAL TECH LLC
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