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A kind of exhaust system, method and device

An exhaust pipe and control system technology, applied in the direction of exhaust device, electronic control of exhaust treatment device, diagnosis device of exhaust treatment device, etc., can solve DPF burning, uncontrollable DPF regeneration temperature, DPF damage, etc. question

Active Publication Date: 2021-12-21
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] After the diesel engine is successfully started, if the DPF is directly regenerated at this time, that is, the diesel is directly injected into the exhaust pipe, so that the diesel is oxidized on the DOC to release heat and burn the carbon particles inside the DPF to restore the conversion efficiency of the DPF. The diesel will burn rapidly, and the regeneration temperature of the DPF cannot be controlled at this time. The high regeneration temperature of the DPF will damage the DPF, and even burn the DPF in serious cases.

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  • A kind of exhaust system, method and device
  • A kind of exhaust system, method and device
  • A kind of exhaust system, method and device

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Embodiment Construction

[0042] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0043] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and not necessarily Used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such th...

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Abstract

The embodiment of the present application discloses an exhaust control system, which includes an ECU, an exhaust pipe, an oil-gas separator, a DOC and a DPF, wherein the air inlet of the oil-gas separator is connected to the exhaust pipe through a first connecting pipe, The air outlet is connected to the exhaust pipe through the second connecting pipe; the first connecting pipe is provided with a first valve, and the first valve controls the communication between the exhaust pipe and the air inlet of the oil-gas separator under the control of the ECU. Relationship; the air inlet of the DOC is connected to the exhaust pipe, and a second valve is set between the air inlet of the DOC and the exhaust pipe. The second valve controls the air intake of the exhaust pipe and the DOC under the control of the ECU. The communication relationship between the ports; the DOC air outlet is connected to the DPF air inlet. When the diesel engine is started in an extreme environment, the system does not accumulate diesel in the DPF, thereby ensuring that the DPF will not be damaged when the DPF is regenerated.

Description

technical field [0001] The present application relates to the technical field of diesel engines, in particular to an exhaust system, method and device. Background technique [0002] With the upgrading of national automobile emission regulations, the emission requirements for automobile exhaust are becoming more and more stringent. Diesel particulate filter (Diesel Particulate Filter, DPF) has become one of the necessary parts of the national six diesel engine exhaust after-treatment technology; DPF is installed in In the diesel vehicle exhaust system, the device used to filter the particulate matter in the exhaust gas of the diesel engine. During the process of filtering the particulate matter of the DPF, the filtered particulate matter will be deposited in its filter device. With the gradual increase of the particulate matter, the filter device will be gradually Blockage will affect the conversion efficiency of the DPF. In order to ensure that the DPF can continuously and e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N9/00F01N11/00F01N13/08F01N3/025
CPCF01N9/00F01N9/002F01N11/002F01N13/08F01N3/0253Y02T10/40
Inventor 王兴元吕文芝张小田陈月春刘加超
Owner WEICHAI POWER CO LTD