Test device for flow performance characteristics of three-way intake and exhaust pipes of internal combustion engines

Abstract

The invention discloses a testing device of flowing property characteristics of an internal combustion engine tee air inlet-exhaust pipe. The testing device comprises a testing part, pipelines, fans, variable-frequency motors, regulating valves, constant-flow flowmeters, sensors, constant-pressure barrels, transition pipes and a plurality of flexible pipes. Three end openings of the testing part are connected with three transition pipes which are connected with the three pipelines directly or through the flexible pipes selectively, and therefore switching of multiple tee pipeline connection methods is achieved. On and off of the regulating valves is selectively controlled to regulate air flow directions in the pipelines, two air flow types with the first end opening as a starting point or an ending point are achieved respectively, and therefore six flow types, comprising three branch flows and three integrated flows, of the tee air inlet-exhaust pipe are achieved, measurement of the flowing characteristics of the six flow types is achieved, the structure is simple, operation is flexible, and high universality is achieved.

Description

technical field [0001] The invention relates to a test device for an internal combustion engine, in particular to a flow performance characteristic test device for a three-way intake and exhaust pipe of the internal combustion engine. Background technique [0002] As an important part of the supercharging system, the intake and exhaust pipeline of the internal combustion engine directly affects the performance level of the diesel engine. The flow capacity test of key pipelines and valve parts is the only way to optimize the design of engine intake and exhaust pipelines, and it is also an important part of engine performance development. At present, most of the research is focused on the intake manifold and cylinder head intake and exhaust passages of vehicle engines, and a number of mature products have been formed, such as the air passage blowing test bench developed by the State Key Laboratory of Internal Combustion Engines of Tianjin University. A mature platform that ha...

AI Technical Summary

Problems solved by technology

[0006] 1. The cylinder head steady flow blowing test bench with mature technology can only measure the flow characteristics of the single-pass (one inlet and one outlet, no flow aggregation and branching) pipelines at the same time

[0007] 2. The flow measurement test bench developed for tee pipes generally has a huge system and complex piping system, and cannot directly measure the flow characteristics of tee pipes with different diameters or different interface spatial positions

[0008] 3. For a certain flow pattern, flow measurement under different flow ratios of branches cannot be realized

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