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Fault recovery confirming method and device

A technology for fault recovery and confirmation instructions, which is applied in the direction of exhaust equipment, electric control of exhaust treatment equipment, diagnostic equipment of exhaust treatment equipment, etc. The effect of increasing satisfaction

Inactive Publication Date: 2018-09-07
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention provides a fault recovery confirmation method and device to solve the problem that the existing confirmation method often takes a long time to confirm the fault recovery

Method used

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  • Fault recovery confirming method and device
  • Fault recovery confirming method and device

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] An embodiment of the present invention provides a fault recovery confirmation method, which is applied to an engine controller, and the flow chart of the method is as follows figure 1 shown, including the following steps:

[0044] S10, acquiring the operating conditions used to confirm the fault recovery of excessive emission and the NOx conversion efficiency threshold corresponding to the operating conditions;

[0045] In the embodiment of the present...

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Abstract

The invention provides a fault recovery confirming method and device. The method is applied to an engine controller, and after a maintaining person removes the discharging standard exceeding fault, avehicle is controlled to run under the determined running work condition, and under the situation that the NOx conversion efficiency of an engine at the time is larger than the NOx conversion efficiency threshold value, discharging standard exceeding fault recovery is determined. Based on that, recovery confirmation can be conducted without running of the vehicle on the spot, the confirmation timeneeded for releasing torque limitation is shortened, and the satisfaction degree of customers is increased.

Description

technical field [0001] The invention relates to the technical field of automobiles, and more specifically, to a method and device for confirming fault recovery. Background technique [0002] With the upgrading of motor vehicle emission regulations, there are more specific regulations on the emission of nitrogen oxides (NOx) from engines. On-Board Diagnostic (OBD) monitors the NOx emission of the engine in real time. Once the limit value specified by the regulations is exceeded, it will activate the vehicle alarm and limit the torque. [0003] At this stage, after the maintenance personnel solve the fault of excessive emission, they need to run the sports car on the spot and make the vehicle run in the NOx monitoring release area. After at least three consecutive NOx emissions are qualified, the fault recovery can be confirmed, and then the alarm and torque limit can be released. [0004] However, because part of the torque is limited, it is difficult for the vehicle to ente...

Claims

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Application Information

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IPC IPC(8): F01N11/00
CPCF01N11/00F01N2560/026F01N2900/0412Y02T10/40
Inventor 岳崇会杨扬解同鹏李万洋许自涛高翠丁云超
Owner WEICHAI POWER CO LTD
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