Test rack for simulating engine emission

Abstract

The invention discloses a test rack for simulating engine emission. The test rack for simulating the engine emission comprises a combustor body structure, an air supply unit, an oil supply unit and acontrol system. The combustor body structure is internally provided with an atomization mixing cavity, a mixing cavity, a contraction mixing area and a combing area which are successively communicated. The air supply unit is connected with the atomization mixing cavity through a combustion-supporting air flue. The oil supply unit is connected with the atomization mixing cavity through an oil sprayer. A NOx filling unit, a PM filling unit and a CH filling unit are connected with the atomization mixing cavity through guide pipes. The combing area is connected with one end of a reaction channel.The interior of the reaction channel is provided with a flame igniter. The other end of the reaction channel is connected with one end of a three-way catalyst. The other end of the three-way catalystis connected with a tail gas exhaust channel. The tail gas exhaust channel is internally provided with an electrically operated valve. The outlet of the tail gas exhaust channel is provided with a tail gas analyzer. The test rack can be used for multiple purposes, and different products can be tested and calibrated on the test rack.

Description

technical field [0001] The invention relates to a test bench, in particular to a test bench for simulating engine discharge, and belongs to the technical field of exhaust gas testing. Background technique [0002] With the upgrading of national vehicle emission regulations, the requirements for vehicle after-treatment design are also more stringent. The National V and National VI regulations have more stringent requirements on vehicle NOx and PM emissions. The implementation of the regulations has prompted after-treatment component manufacturers to improve product quality and performance, speed up development progress, and reduce development costs. [0003] The verification of traditional aftertreatment emission components can be tested on the engine bench, adjusted to produce various operating conditions of the actual engine, and the emission characteristics of the components under these operating conditions are tested. The advantage of the traditional test method is its a...

AI Technical Summary

Problems solved by technology

[0005] (2) Long cycle

The engine of the engine bench is generally a newly developed model, which needs to wait and cooperate with the node of the OEM. At the same time, the development and debugging also need a long period. In addition, once the engine control logic is changed, or the supplier needs the engine to provide a new test process, all Need to wait for engine manufacturer to do recalibration;

[0006] (3) Lack of flexibility

The engine stand is dedicated to special planes. One model is for one product. Once the developed product changes, it must be equipped with the corresponding model. Old models cannot be used for new product development.

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