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System for testing performance of oxygen sensor in use for car

A technology of oxygen sensor and testing system, which is applied in the direction of fuel oil testing, instruments, measuring devices, etc. It can solve the problems of high price, difficulty in comprehensively inspecting dynamic output performance, and inability to quantify, so as to achieve the effect of convenient mutation switching

Active Publication Date: 2007-05-09
BYD CO LTD
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Problems solved by technology

Some people also use gaseous CxHy fuel to replace fuel oil, but often just fill a certain amount of CxHy and air in a closed container for mixed combustion, so that the combustion exhaust gas is close to a static state, simulating an extremely rich and extremely lean exhaust gas environment, qualitative assessment The static output performance of the oxygen sensor; but this kind of assessment can neither be quantitative nor it is difficult to comprehensively examine the dynamic output performance
[0004] In summary, the current oxygen sensor performance testing devices are either complex in structure, expensive, or unable to conveniently, accurately and comprehensively evaluate the performance of oxygen sensors

Method used

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  • System for testing performance of oxygen sensor in use for car
  • System for testing performance of oxygen sensor in use for car

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Embodiment Construction

[0013] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0014] The block diagram of the present invention is as shown in Figure 1, a kind of automobile oxygen sensor performance test system, comprises air output device, fuel output device and combustion gas output device, control module, combustion device, tail gas analysis device, oxygen sensor, exhaust pipe and temperature control device.

[0015] The air output device includes an air pump 11 in Fig. 2, an air pressure reducing valve 12, an air dewatering valve 13, an air pressure stabilizing valve 14, a first glass rotameter 15, a first solenoid valve 16, one or more than one air Branch 17, air pressure regulating valve 18, devices for flow control include the first glass rotameter 15, first electromagnetic valve 16, air pressure regulating valve 18, combustible CxHy gas output device includes gas storage bottle 21, decompressio...

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Abstract

A test system of oxygen transducer used on automobile comprises fuel output unit for mixing fuel with air to generate mixture, combustion unit including ignition element and combustion chamber with air exhaust pipe, oxygen transducer set on air exhaust pipe with its head being inserted into said pipe to sense residual oxygen concentration in tail gas, signal collection unit for receiving signal outputted by oxygen transducer.

Description

【Technical field】 [0001] The invention relates to a device for testing the performance of an oxygen sensor, in particular to a performance testing system for an oxygen sensor used in automobiles. 【Background technique】 [0002] In order to meet the emission regulations of various countries, three-way catalytic reactors are generally installed on automobiles. Since the three-way catalytic reactor has the highest purification rate near the theoretical air-fuel ratio (14.7:1), once it deviates from the ideal air-fuel ratio, the purification ability of the three-way catalyst for CO, HC and NOx will drop sharply, so it is installed in the exhaust pipe The oxygen sensor uses the rich-lean feedback information provided by the oxygen sensor to perform closed-loop control, so as to control the air-fuel ratio of the mixture near the theoretical value. On an engine that uses a three-way catalytic converter to reduce exhaust pollution, an oxygen sensor is an essential component. The d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/409G01N27/00G01N33/22
Inventor 李斌蒋荣勋王以强魏波吴丙炎
Owner BYD CO LTD
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