Regeneration method for diesel particulate filter
A particulate filter and diesel technology, which is applied in the electrical control and exhaust treatment of machines/engines, exhaust treatment devices, etc., can solve problems such as high combustion temperature, burning of diesel particulate filters, and increased fuel consumption. To achieve the effect of saving computing resources
Active Publication Date: 2017-12-05
BOSCH AUTOMOTIVE DIESEL SYST
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Problems solved by technology
However, this method of regeneration also increases fuel consumption due to the need for additional injectors to inject fuel
In addition, the combustion temperature of the soot particles of the diesel particulate filter (that is, the outlet temperature of the oxidation catalyst) is usually high, and if it is regenerated frequently, it is easy to burn the diesel particulate filter
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[0018] In the various figures of the application, structurally identical or functionally similar features are indicated by the same reference numerals.
[0019] figure 1 An embodiment of an exhaust gas aftertreatment system of a diesel vehicle adopting the method for regenerating a diesel particulate filter according to the present invention is schematically shown. The exhaust gas post-treatment system generally includes an oxidation catalyst 300 and a diesel particulate filter 400 , which are sequentially connected in series to the gas outlet of a diesel engine 100 of a diesel vehicle through an exhaust pipe 500 .
[0020] It should be pointed out that the regeneration method of the diesel particulate filter according to the present invention is particularly suitable for light-duty diesel vehicles or heavy-duty diesel vehicles. In the context of the present invention, a light-duty diesel vehicle refers to a diesel vehicle with a diesel engine whose displacement is between 2 ...
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The invention discloses a regeneration method for a diesel particulate filter of a diesel vehicle. According to the regeneration method, a diesel oxidation catalyst and the diesel particulate filter are sequentially connected in series at the downstream of a gas outlet of an engine of the diesel vehicle through exhaust pipes, a carrier material of the diesel particulate filter is selected to ensure that the exhaust gas pressure difference between an inlet and an outlet of the diesel particulate filter can be measured in a quantitative manner, and a first working condition parameter set in advance is stored in the diesel vehicle. The regeneration method comprises the passive regeneration starting process, wherein the passive regeneration starting process is executed only when the diesel vehicle meets the requirement of the first working condition parameter and comprises the step of circularly executing the following procedures of determining the exhaust gas pressure difference between the inlet and the outlet of the diesel particulate filter; comparing the measured exhaust pressure difference with a preset threshold value, and increasing the exhaust temperature at an inlet of the diesel oxidation catalyst if the measured exhaust pressure difference is greater than or equal to the threshold value; and continuing measuring the exhaust pressure difference if the measured exhaust pressure difference is less than the threshold value.
Description
technical field [0001] The invention relates to a method for regenerating a diesel particle filter of a diesel vehicle. Background technique [0002] In order to cope with the increasingly stringent emission requirements of diesel vehicles, diesel particulate filters (DPF) are widely used in diesel vehicles. The diesel particulate filter is mainly installed in the exhaust emission treatment system of diesel vehicles, which can filter out most of the pollutant particles (PM) in the engine exhaust, so as to make the exhaust emission comply with the regulations. [0003] Generally, in a diesel vehicle, an oxidation catalyst (DOC) and a diesel particulate filter are sequentially connected in series downstream of an exhaust gas outlet of a diesel engine via an exhaust pipe. For ordinary small diesel vehicles, the electronic control unit (ECU) instructs the sensor to continuously monitor the exhaust pressure difference between the inlet and outlet of the diesel particulate filter...
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IPC IPC(8): F01N9/00F01N3/025
CPCF01N3/0253F01N9/002F01N2250/02F01N2370/22F01N2900/08F01N2900/102F01N2900/16Y02T10/40
Inventor 秦岩田威卢强
Owner BOSCH AUTOMOTIVE DIESEL SYST