An air intake device that generates high-response wide-spectrum pulsating airflow

A technology of pulsating airflow and air intake device, which is applied in the direction of measurement device, engine test, machine/structural component test, etc., can solve the problems of high test cost, complicated operation, and inability to observe intuitively, and achieve the elimination of inhomogeneity, The effect of reducing test costs

Active Publication Date: 2021-06-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the wind rack system or the engine is generally used to do experiments related to natural aspiration and turbocharged inhalation; the experiment using the engine body has a relatively real effect on the influence of intake air flow on engine combustion efficiency, torque, and exhaust emissions. As a result, research on airflow movement, airflow on preheating flame research, and visual combustion has certain limitations: the test cost is high, the operation is complicated, the engine needs to be modified, and it cannot be observed intuitively.
However, the air rack system usually adopts the adjustment of the fan speed to obtain the steady-state air intake at different wind speeds, which is quite different from the actual engine airflow pattern.
There is currently no effective intake system that can be used to simulate the actual intake of the engine

Method used

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  • An air intake device that generates high-response wide-spectrum pulsating airflow
  • An air intake device that generates high-response wide-spectrum pulsating airflow
  • An air intake device that generates high-response wide-spectrum pulsating airflow

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Embodiment Construction

[0020] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0021] as attached figure 1 As shown, the present invention provides an air intake device that generates high-response wide-spectrum pulsating airflow. The air intake device includes an air intake pipe 5, an air intake unit and a pulsation unit.

[0022] In the air intake unit, the fan 1 operates to provide airflow to the air intake pipe 5, and the air intake pipe 5 is installed with a flow equalizer I2 and a pulsation generator 3. In the air intake unit, the distance between the fan and the flow equalizer I2 is far enough, and the airflow reaching the flow equalizer I2 is smooth and uniform. The flow equalizer I2 is used to further eliminate the lateral airflow and ensure the smooth and uniform airflow entering the pulsation unit. The surface of flow equalizer I2 is uniformly and densely distributed with honeycomb holes with a diameter of 1.5mm.

[002...

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Abstract

The invention discloses an air intake device for generating high-response wide-spectrum pulsating airflow. The air intake device includes an air intake pipe, an air intake unit and a pulsation unit; the air intake unit is installed at one end of the air intake pipe, and the air intake unit is The trachea provides a smooth and uniform airflow, and the pulsation unit is installed inside the intake pipe, and the pulsation unit generates a pulsating airflow that varies with time and space from the airflow provided by the intake unit. The invention can simulate the actual intake conditions of naturally aspirated engines and turbocharged engines by obtaining pulsating airflow, and is used to study the effects of parameters such as airflow movement and intake air volume on engine intake preheating, combustion efficiency, thermoacoustic coupling and emissions etc. influence.

Description

technical field [0001] The invention relates to the technical field of engines, and specifically designs an intake device for generating high-response wide-spectrum pulsating airflow. Background technique [0002] The internal combustion engine is the main source of power in the transportation of freight, passenger transportation and construction machinery, which provides convenience for people's life. Diesel and gasoline are non-renewable energy sources. On the premise of meeting production development, improving energy conversion efficiency in various ways, reducing fuel consumption, reducing emissions, saving energy and reducing pollution are important directions for the development of internal combustion engines. The structure of the engine intake system determines the flow characteristics of the intake airflow, such as intake resistance, intake uniformity, intake air volume and other parameters. The flow performance of the intake air flow is related to the combustion e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M15/02
CPCG01M15/02
Inventor 刘福水王字满李志爽胡建明胡岩磊
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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