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Regeneration controller for exhaust purification apparatus of internal combustion engine

An exhaust purification device, technology of purification device, applied in exhaust device, electrical control, engine control and other directions

Inactive Publication Date: 2006-10-04
TOYOTA JIDOSHA KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, incomplete combustion of the fuel may generate a large amount of particulate matter that further accumulates in the filter

Method used

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  • Regeneration controller for exhaust purification apparatus of internal combustion engine
  • Regeneration controller for exhaust purification apparatus of internal combustion engine
  • Regeneration controller for exhaust purification apparatus of internal combustion engine

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Experimental program
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Embodiment Construction

[0020] A regeneration controller for an exhaust purification device of an internal combustion engine according to a first embodiment of the present invention will now be discussed. figure 1 is a schematic diagram of a control system including a regeneration controller applied to a vehicle diesel engine. The application of the regeneration controller of the present invention is not limited to diesel engines. That is, the regeneration controller of the present invention can also be applied to lean-burn gasoline engines.

[0021] The diesel engine 2 has a plurality of cylinders including first to fourth cylinders #1, #2, #3, and #4. In each of cylinders #1 to #4, combustion chamber 4 is connected to surge tank 12 via intake port 8 and intake manifold 10 . Each intake port 8 is opened and closed by an intake valve 6 . The surge tank 12 is connected to an intercooler 14 and a supercharger such as an exhaust turbocharger 16 . Fresh air supplied via the air cleaner 18 is compress...

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PUM

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Abstract

A regeneration controller for preventing particulate matter from increasing when an exhaust purification apparatus is inactivated. The regeneration controller includes an ECU 70 for heating the exhaust purification apparatus and eliminating the particulate matter accumulated in the exhaust purification apparatus when an estimated accumulation amount is greater than a reference accumulation amount. The ECU 70 obtains the estimated accumulation amount by estimating the amount of particulate matter accumulated in the exhaust purification apparatus. An exhaust temperature sensor 44 detects the temperature of the exhaust purification apparatus. The ECU 70 intermittently decreases the air-fuel ratio of exhaust to heat the exhaust purification apparatus and perform burn-up heating for burning the particulate matter. The ECU 70 further prohibits burn-up heating when the temperature detected by an exhaust temperature sensor 44 decreases to a catalyst inactivation level.

Description

technical field [0001] The present invention relates to a regeneration controller for removing particulate matter accumulated in an exhaust purification system of an internal combustion engine. Background technique [0002] Japanese Patent Laid-Open Nos. 2002-227688 and 2003-20930 describe a technique used when particulate matter (PM) accumulates in a filter arranged in an exhaust system of a diesel engine. Particulate matter is burned and removed from the filter. [0003] More specifically, the repeated adjustment of the air-fuel ratio of the exhaust gas between a rich state and a lean state causes the temperature of the exhaust purification device to become higher than during normal purification. In addition, active oxygen is released from the catalyst of the exhaust purification device when the air-fuel ratio of the exhaust gas is in a lean state. This burns off particulate matter that has accumulated in the filter. [0004] In this burning process, when the air-fuel r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/02F01N3/025F01N3/02B01D46/42B01D53/94F01N3/24F01N3/28F02D41/14
CPCF02D41/025F02D2200/0812Y02T10/26F02D41/1446F02D41/029F02D41/1408Y02T10/12F02D41/02F01N3/025
Inventor 横井辰久山本幸久
Owner TOYOTA JIDOSHA KK