Method for simulating different egr leak volumes

Abstract

The invention discloses a device and method for simulating different EGR leakage amounts. The device for simulating different EGR leakage amounts is arranged in the EGR system of a gas engine. The device for simulating different EGR leakage amounts Including the mounting seat, the mounting seat is in the form of thread, and the mounting seat is installed on the EGR pipeline between the inlet position of the EGR air intake pipe and the inlet position of the EGR mixer. The simulated leakage tooling is set on the mounting seat, so that by setting simulated leaks of different sizes Tooling to meet the simulation needs of different leakage. The invention can select the position of the mounting seat according to the structural characteristics of different engines and the convenience of arrangement, and can adjust the variable EGR leakage amount, thereby realizing accurate simulation of leakage amount and repeatability.

Description

technical field [0001] The present invention relates, in particular, to a device and method for simulating different EGR leakage quantities. Background technique [0002] At present, with the stricter emission regulations and the arrival of new emission regulations, many engine manufacturers have chosen a new technical route according to the test verification results in order to make the engine meet the requirements of the new emission regulations. For example, many engine manufacturers have adopted equivalent combustion technical route. At the same time, in order to reduce the original exhaust and exhaust temperature of the engine, an EGR (exhaust gas recirculation) system has been added to form a technical route of equivalent + EGR. The EGR system, in simple terms, is to reintroduce part of the exhaust gas of the engine into the cylinder to participate in the next round of in-cylinder combustion. Increasing EGR under equivalent combustion can reduce the exhaust temperatur...

AI Technical Summary

Problems solved by technology

When the engine has EGR leakage, the EGR rate is less than a certain range, which will have an adverse effect on the combustion of the engine. For example, for a gas engine, EGR leakage will cause the engine to be prone to knocking

Under such abnormal combustion conditions, it will have a serious impact on the engine, ranging from affecting the combustion stability of the engine and having adverse consequences on the economy, and causing engine knocking in severe cases, thereby damaging the engine.

[0003] In the prior art, the main method of simulating EGR leakage is to drill holes on the EGR pipeline or operate at the gasket on the joint surface of the two parts on the EGR pipeline, that is, to artificially manufacture gaskets that are not tightly sealed to cause EGR air leakage situation

However, there are obvious defects in the methods of the prior art

Among them, the direct drilling method cannot accurately simulate the required EGR leakage in one place, and requires repeated operations. At the same time, it will also damage the parts themselves, making it difficult to restore the engine to its original state.

Manufacturing gaskets are not tightly sealed, although it is easy to restore the original state of the engine, but the control of the leakage is not precise, so it is difficult to reproduce the accurate EGR leakage

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