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A double dpf regeneration control method, device and engine

A technology of regeneration control and DPF, applied in engine components, combustion engines, machines/engines, etc., can solve the problems of poor reliability and low accuracy of dual DPF, and achieve the effect of improving reliability

Active Publication Date: 2022-03-15
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a double DPF regeneration control method, which is used to solve the technical problem in the prior art that the accuracy of controlling the regeneration fuel injection volume of the double DPF is not high, resulting in poor reliability when the double DPF is regenerated

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  • A double dpf regeneration control method, device and engine
  • A double dpf regeneration control method, device and engine
  • A double dpf regeneration control method, device and engine

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Embodiment Construction

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the 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.

[0060] An embodiment of the present application provides a double DPF regeneration control method, which is applied to an engine aftertreatment system including a first DPF and a second DPF, such as figure 1 As shown, the described method includes the following steps:

[0061] Step S101, determine the actual upstream temperature of the DPF according to the upstream temperature measurement value of the first DPF, the upstream temperature measurement value of the second DPF and a pres...

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Abstract

The invention discloses a dual DPF regeneration control method, device and engine. The method is applied to an engine aftertreatment system including a first DPF and a second DPF, and includes: according to the upstream temperature measurement value of the first DPF, a second DPF The DPF upstream temperature measurement value and the preset temperature limit determine the DPF upstream actual temperature; according to the DPF upstream temperature set value and the DPF upstream actual temperature, the closed-loop control is performed, and the HC injection feedback oil amount is determined according to the closed-loop control result; according to the HC injection feedback oil DPF regeneration is performed based on the regenerative fuel injection amount; the DPF upstream temperature setting value is to query the DPF according to the exhaust gas mass flow and the DOC upstream temperature measurement value The upstream temperature set value is determined after MAP, thereby improving the reliability of the regeneration of the dual DPF.

Description

technical field [0001] The present application relates to the technical field of automobile control, and more specifically, relates to a double DPF regeneration control method, device and engine. Background technique [0002] In the diesel engine aftertreatment system, it is necessary to use DPF to reduce engine particulate emissions. When the carbon load reaches a certain limit, the DPF needs to be regenerated. DPF regeneration is divided into active regeneration and passive regeneration. Active regeneration injects diesel through the rear injection of the engine or the seventh fuel injector, so that Soot can 2 The reaction generally occurs periodically; passive regeneration through engine thermal management measures or when the engine is running at a high temperature, so that Soot is at a lower temperature (generally 250°C-450°C), and NO 2 The reactions are generally continuous. [0003] The engine aftertreatment system with double DPF can reduce the exhaust back pressu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N9/00F01N3/025
CPCF01N9/002F01N3/0253F01N2900/1602F01N2900/1806F01N2900/0412Y02T10/40
Inventor 李钊王佳兴安存国王志坚王国栋褚国良杜祥宁王云
Owner WEICHAI POWER CO LTD