Three-way catalyst ageing detection method and device

A technology of a three-way catalytic converter and a detection method, which is applied to the electronic control of mufflers, exhaust devices, and exhaust treatment devices, etc. It can solve the problems that vehicles cannot meet the requirements of emission regulations and affect the effect of automobile exhaust treatment, so as to avoid The effect of the overall treatment effect
CN110284947AInactive Publication Date: 2019-09-27WEICHAI POWER CO LTD
18 Cites 15 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
WEICHAI POWER CO LTD
Publication Date
2019-09-27
Estimated Expiration
Not applicable ยท inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a three-way catalyst ageing detection method and device applied to the technical field of engines. The method includes the steps that after an engine retreats the reverse towing working condition, a preset parameter influencing the bed temperature of a three-way catalyst is obtained; if the obtained preset parameter is within the preset range, the oxygen storage amount of the three-way catalyst is calculated; the size relation between the obtained oxygen storage amount and the preset oxygen storage amount threshold value is further obtained through comparison; and if the calculated oxygen storage amount is smaller than the preset oxygen storage amount threshold value, it is judged that the three-way catalyst ages. According to the three-way catalyst ageing detection method and device, the oxygen storage amount in the normal work state of the three-way catalyst is obtained, ageing detection is conducted with the oxygen storage amount as the judgment reference, the whole detection process can be completed under the condition that the actual work state of the three-way catalyst is not influenced, and therefore it is avoided that the overall processing effect of vehicle tail gas is influenced.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of engines, and in particular relates to a three-way catalytic converter aging detection method and device. Background technique

[0002] The three-way catalytic converter (Three-Way-Catalyst) can convert harmful gases such as CO, HC and NOx emitted from automobile exhaust into harmless carbon dioxide, water and nitrogen through oxidation and reduction. As an important external purification device, if the three-way catalytic converter is aging, it will seriously affect the treatment effect of automobile exhaust, making the vehicle unable to meet the increasingly stringent emission regulations.

[0003] In view of the important role of the three-way catalytic converter in practical applications, how to detect the aging state of the three-way catalytic converter and replace the aged three-way catalytic converter in time has become a technical problem to be solved urgently by those skilled in the art. Content...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More