Test method, device, terminal and storage medium for performance of three-way catalytic converter
A technology of a three-way catalytic converter and a testing method, which is applied to the electronic control of exhaust treatment devices, diagnostic devices for exhaust treatment devices, engine components, etc., and can solve the evaluation of the oxygen storage capacity and oxygen release capacity of three-way catalytic converters, etc. problems, to achieve the effect of easy operation, easy inspection and replacement
Active Publication Date: 2021-12-17
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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[0004] The main purpose of the present invention is to provide a test method, device, terminal and storage medium for the performance of a three-way catalytic converter. Technical Issues for Conducting Assessments
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no. 1 example
[0058] refer to figure 2 , is the first embodiment of a three-way catalytic converter performance testing method of the present invention, and the three-way catalytic converter performance testing method comprises steps:
[0059] Step S001, adjusting the engine speed and the throttle in real time to control the gas volume at the inlet end of the three-way catalytic converter within a preset range;
[0060] In one embodiment, the preset range is an interval value, so as to ensure that the gas volume at the inlet end of the three-way catalytic converter is within the interval and the engine runs stably. see image 3 , is a structural schematic diagram of an embodiment of a test device for the performance of the three-way catalytic converter of the present invention, the inlet end of the three-way catalytic converter is connected to the engine (not shown), and an air-fuel ratio instrument is installed at the inlet end of the three-way catalytic converter. The fuel ratio meter ...
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The invention discloses a method for testing the performance of a three-way catalytic converter, which comprises the steps of: adjusting the rotational speed and throttle of the engine in real time to control the gas volume at the inlet end of the engine within a preset range; adjusting the excess air coefficient at the inlet end of the three-way catalytic converter Decrease, and obtain the rear oxygen voltage value in real time; calculate the oxygen storage time and oxygen release time of the catalyst in the three-way catalytic converter according to the change rule of the excess air coefficient and the rear oxygen voltage value; evaluate the three-way catalyst according to the oxygen storage time and oxygen release time Catalyst performance. The invention changes the parameters of the oxygen voltage value behind the three-way catalytic converter by controlling the excess air ratio, thereby measuring the oxygen storage time and oxygen release time of the catalyst and realizing the performance evaluation of the three-way catalytic converter.
Description
technical field [0001] The invention relates to the technical field of engines, in particular to a method, device, terminal and storage medium for testing the performance of a three-way catalytic converter. Background technique [0002] The three-way catalytic converter is the most important external purification device installed in the automobile exhaust system. It can convert harmful gases such as carbon monoxide CO, hydrocarbons HC and nitrogen oxides NOx from automobile exhaust into Harmless carbon dioxide, water and nitrogen. In the prior art, by measuring the voltage transition time of the sensor at the outlet end of the three-way catalytic converter, it is judged whether the three-way catalytic converter is working normally. It is an important indicator of the three-way catalytic converter, and its performance cannot be judged only by the voltage jump time. If the performance of the three-way catalytic converter is degraded, it will affect the purification of automob...
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IPC IPC(8): F01N11/00
CPCF01N11/00F01N2900/16F01N2900/0601Y02T10/40
Inventor 丁磊薛龙龙柴洪磊
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD