Air/fuel ratio oxygen sensor performance measuring system

Abstract

The invention discloses a performance testing system for oxygen sensors of air-fuel delivery ratio, which comprises a make-up gas device, a combustion device, a temperature control device and a testing device. Wherein, the combustion device is provided a heating furnace; one end of the heating furnace is connected with a combustion chamber; the other end of the heating furnace is connected with ameasuring chamber; the measuring chamber is connected with the testing device which can measure the oxygen concentration in the combustion device, the combustion chamber is connected with the temperature control device which can measure and control the lumen temperature of the heating furnace; and the inlet end of the combustion chamber is connected with the make-up gas device. The make-up gas device realizes the reasonable ratio of CxHy combustible gas to air; the combustion device is composed of the combustion chamber, the heating furnace and the measuring chamber, wherein the heating furnace is used to generate tail gas of different combustion states, the heating furnace heats the tail gas to the temperature required by measurement, and the measuring chamber provides placing and measuring location for the tested oxygen sensors; the temperature control device realizes the temperature control of the tested tail gas. The invention has the advantage of realizing that the variance of the dilute concentrated situation of the combustion tail gas is quick and stable, the measurement, control and conversion of each performance are free and smooth, and the record is convenient, etc.

Description

technical field [0001] The invention specifically relates to a performance testing system of an air-fuel ratio oxygen sensor for automobiles. Background technique [0002] In the three-way catalytic EFI control system of automobile engines, the oxygen sensor is an important device in the control system. Under the condition of air-fuel ratio λ>1, the high and low voltages are output respectively, and then the three-way catalytic EFI control system of the automobile engine, ECU, receives this voltage signal to realize the judgment of the combustion status of the engine, so as to control the intake air volume of the engine A reasonable ratio of fuel injection quantity to realize the dynamic balance control that the engine combustion condition fluctuates around the ideal air-fuel ratio, λ=1. Therefore, it is required to test the following technical parameters of the oxygen sensor: 1. The output voltage of the oxygen sensor under different combustion conditions, mainly includ...

AI Technical Summary

Problems solved by technology

However, the current oxygen sensor performance testing devices are either complex in structure, expensive, or unable to conveniently, accurately and comprehensively evaluate the performance of the oxygen sensor

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