Gasoline engine particulate filter regeneration control method

A particle trap, regeneration control technology, applied in the direction of engine control, electric engine control automatic control, electrical control, etc., can solve the problems of exhaust system temperature out of control, increased after-treatment system damage, etc., to reduce the total time and alleviate the Combustion instability, cost saving effect

Active Publication Date: 2020-10-09
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Misfire can cause the temperature of the exhaust system to go out of control, greatly increasing the risk of damage to the aftertreatment system due to overheating

Method used

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  • Gasoline engine particulate filter regeneration control method
  • Gasoline engine particulate filter regeneration control method
  • Gasoline engine particulate filter regeneration control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] This embodiment provides a method for controlling the regeneration of a gasoline engine particulate filter, and the method includes the following steps:

[0067] (1) Detect the access signal of the parking regeneration program including water temperature and / or oil temperature, and enter the parking regeneration program;

[0068] (2) Increase the idle speed to R1=2500rpm;

[0069] (3) Significantly reduce the ignition advance angle to ZW1=-15°C CA BTDC, reduce the air-fuel ratio to λ1=1.03, carry out exhaust heating, and stop heating when the temperature of the gasoline engine particle filter reaches the temperature threshold T1=700°C;

[0070] (4) Reduce the air-fuel ratio to λ2=1.15, reduce the ignition advance angle ZW2 to -5°C CA BTDC, and perform the regeneration of the gasoline engine particle filter, and stop the regeneration when the temperature of the gasoline engine particle filter reaches the temperature threshold T2=550°C ;

[0071] (5) Alternately perform...

Embodiment 2

[0073] This embodiment provides a method for controlling the regeneration of a gasoline engine particulate filter, and the method includes the following steps:

[0074] (1) Detect the access signal of the parking regeneration program including water temperature and / or oil temperature, and enter the parking regeneration program;

[0075] (2) Increase the idle speed to R1=2500rpm;

[0076] (3) Significantly reduce the ignition advance angle to ZW1=-15°C CA BTDC, control the air-fuel ratio at the stoichiometric air-fuel ratio to λ1=λ0=1, carry out exhaust heating, until the temperature of the gasoline engine particulate filter is the temperature threshold T1= Stop heating at 700°C;

[0077] (4) Reduce the air-fuel ratio to λ2=1.2, keep the ignition advance angle ZW2 unchanged at 23°C CA BTDC, perform regeneration of the gasoline engine particle filter, and stop when the temperature of the gasoline engine particle filter reaches the temperature threshold T2=550°C regeneration; ...

Embodiment 3

[0080] This embodiment provides a method for controlling the regeneration of a gasoline engine particulate filter, and the method includes the following steps:

[0081] (1) Detect the access signal of the parking regeneration program including water temperature and / or oil temperature, and enter the parking regeneration program;

[0082] (2) Increase the idle speed to R1=2000rpm;

[0083] (3) Significantly reduce the ignition advance angle to ZW1=-20°C CA BTDC, enrich the air-fuel ratio to λ1=0.9, carry out exhaust heating, and stop heating when the temperature of the gasoline engine particulate trap reaches the temperature threshold T1=700°C;

[0084] (4) Reduce the air-fuel ratio to λ2 = 1.15, keep the ignition advance angle ZW2 unchanged at 23°C CA BTDC, perform regeneration of the gasoline engine particulate filter, and stop when the temperature of the gasoline engine particulate filter reaches the temperature threshold T2 = 550°C regeneration;

[0085] (5) Alternately ca...

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Abstract

The invention provides a gasoline engine particulate filter regeneration control method. According to the method, through alternately carrying out an exhaust gas heating process and a gasoline engineparticulate filter regeneration process, an air-fuel ratio and/or an ignition advance angle can be adjusted in each independent process, so that the combustion stability and the regeneration speed aregreatly improved, the occurrence of the fire happened in the regeneration process is avoided, the risk of the temperature runaway of an exhaust system caused by fire is reduced, and a higher industrial application value is achieved.

Description

technical field [0001] The invention relates to the technical field of automobile tail gas treatment, in particular to a regeneration control method of a gasoline engine particulate trap. Background technique [0002] Compared with the port injection gasoline engine (PFI), the gasoline direct injection engine (GDI) can increase the power per liter and reduce the fuel consumption at the same time. Especially the supercharged direct injection gasoline engine (GDIT) which uses the combination of direct injection technology and turbocharging technology has been increasing its market share in recent years, and has been more and more recognized by users. At the same time, with the increasingly stringent emission regulations, more stringent requirements have been put forward for the emissions of gasoline engines. Among them, the National VI (B) emission regulations have proposed 6.0×10 particulate matter emissions from gasoline engines. 11 A / km requirement. Due to the limitation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D43/00F02D29/02
CPCF02D37/02F02D41/029F02D41/0245F02P5/1508F02P5/045F02D29/02F02D2200/02F02D2200/0812F01N2430/06F01N2430/00F01N2250/02Y02T10/40
Inventor 段加全陈海娥闫朝亮冯海涛徐宁宁
Owner CHINA FIRST AUTOMOBILE
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