A sound attenuation quick-connect NVH intercooled system

Abstract

The utility model belongs to NVH test rig field, concretely is a kind of sound attenuation quick connection NVH intercooling system. Including secondary control instrument, temperature sensor after intercooling, electromagnetic control valve, stainless steel pipe, peripheral cooling water inlet pipe, stainless steel pipe quick connection buckle, engine, heat exchange fixed base and heat exchanger. The utility model has two control modes, controls water volume and water flow, and it is convenient to install using the mode of stainless steel pipe collocation buckle, and the noise radiation elimination effect of internal airflow of intercooling system is improved using double-layer sound insulation material package;And use portable heat exchanger, small, fixed on the surface of iron floor, effectively reduce external sound reflection problem.

Description

Technical Field

[0001] This utility model belongs to the field of NVH bench testing, specifically involving NVH bench testing for eliminating internal airflow radiation noise and quick connection, specifically a noise-reducing quick-connect NVH intercooling system. Background Technology

[0002] As the heart of a car, the engine is crucial in the development process. During engine research and development, noise-related tests need to be conducted in an anechoic chamber to determine the engine's NVH (Noise, Vibration, and Harshness) parameters. Due to the specific requirements of NVH testing, it is necessary to minimize external sound reflections, including noise radiation from the airflow inside the semi-anechoic chamber intercooler system. Therefore, a bench-mounted anechoic quick-connect intercooler system was designed. The original intercooler was positioned far from the engine to reduce interference, but because the intermediate piping used corrugated pipes wrapped with sound-absorbing foam, it caused excessive noise radiation from the internal airflow. The excessively long piping also caused excessive pressure before and after the intercooler, resulting in abnormal engine performance. Since the corrugated pipe connecting the intercooler to the engine's intake and exhaust ports has a fixed length, the connection of the intercooler piping before and after the engine requires finding suitable flexible hoses for connection and installation, which makes the bench-mounted engine setup inefficient. Utility Model Content

[0003] This utility model proposes a noise-reducing quick-connect NVH intercooling system. In addition to meeting the intercooling temperature control requirements, it rationally improves the noise radiation elimination effect of the airflow within the intercooling system, solves the problem of large pressure differences before and after the intercooler caused by excessively long piping, reduces external sound reflection, and utilizes stainless steel piping with quick-connect snap-fit ​​connections for convenience and speed, improving the efficiency of test bench assembly. The specific technical solution is as follows:

[0004] A noise-reducing quick-connect NVH intercooling system includes a secondary control instrument, an intercooler post-temperature sensor, an electromagnetic control valve, a stainless steel pipe, an external cooling water inlet pipe, stainless steel pipe quick-connect clips, an engine, a heat exchange mounting base, and a heat exchanger. The external cooling water inlet pipe is connected to the water pipe of the heat exchanger via the electromagnetic control valve. The air inlet and outlet pipes of the heat exchanger's air pipe are connected to the engine's exhaust pipe and intake pipe, respectively, via stainless steel pipes. Stainless steel pipe quick-connect clips are provided at the front and rear ends of the stainless steel pipe. An intercooler post-temperature sensor is installed at the air outlet pipe of the heat exchanger's air pipe. The intercooler post-temperature sensor and the electromagnetic control valve are electrically connected to the secondary control instrument.

[0005] Furthermore, the heat exchanger is mounted on a heat exchange fixed base.

[0006] Furthermore, the stainless steel pipe is provided with two layers of acoustic wrapping: a damping sound insulation sleeve is provided on the outer layer of the inner stainless steel pipe, and a sound insulation cotton sleeve is provided on the outermost layer.

[0007] The beneficial effects of this utility model are as follows: (1) Two control modes: mode one directly controls the opening of the solenoid valve, controls the water flow into the heat exchanger, and exchanges heat with the airflow to achieve the control of the intercooling effect; mode two uses the temperature feedback signal after intercooling to determine the opening of the solenoid valve according to the feedback temperature, controls the water flow into the heat exchanger, and exchanges heat with the airflow to achieve the control of the intercooling effect and meet the intercooling temperature control effect; (2) Thickened stainless steel with buckles is used, which is convenient and quick and improves the efficiency of the platform construction. Two layers of acoustic wrapping are adopted. The inner layer is wrapped with mud-blocking material for sound absorption, and the outer layer is wrapped with double layers of sound insulation cotton material to improve the noise radiation elimination effect of the airflow inside the intercooling system; (3) A portable heat exchanger is used and placed next to the engine to solve the problem of large pressure difference before and after the intercooling caused by the excessively long pipeline. It is small in size and fixed on the surface of the iron floor, which effectively reduces the problem of external sound reflection. Attached Figure Description

[0008] Figure 1 A schematic diagram of the structure of this utility model;

[0009] Figure 2 A schematic diagram of the specific structure of a stainless steel pipe.

[0010] Figure label:

[0011] 1-Secondary control instrument, 2-Intercooler rear temperature sensor, 3-Solenoid control valve, 4-Stainless steel pipe, 5-External cooling water inlet pipe, 6-Stainless steel pipe quick-connect clip, 7-Engine, 8-Heat exchange mounting base, 9-Heat exchanger, 41-Stainless steel inner pipe, 42-Sound insulation cotton sleeve, 43-Damping sound insulation sleeve. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] like Figure 1As shown, a noise reduction quick-connect NVH intercooling system includes a secondary control instrument 1, an intercooler post-temperature sensor 2, an electromagnetic control valve 3, a stainless steel pipe 4, an external cooling water inlet pipe 5, stainless steel pipe quick-connect clips 6, an engine 7, a heat exchange mounting base 8, and a heat exchanger 9. The external cooling water inlet pipe 5 is connected to the water pipe of the heat exchanger 9 through the electromagnetic control valve 3. The air inlet and outlet pipes of the heat exchanger 9 are connected to the engine exhaust pipe and intake pipe, respectively, through the stainless steel pipe 4. Stainless steel pipe quick-connect clips 6 are respectively provided at the front and rear ends of the stainless steel pipe 4. An intercooler post-temperature sensor 2 is provided at the air outlet pipe of the heat exchanger 9. The intercooler post-temperature sensor 2 and the electromagnetic control valve 3 are electrically connected to the secondary control instrument 1.

[0014] The heat exchanger is mounted on the heat exchange fixed base 8.

[0015] The stainless steel pipe 4 is provided with two layers of acoustic wrapping. A damping sound insulation sleeve 43 is provided on the outer layer of the stainless steel inner pipe 41, and a sound insulation cotton sleeve 42 is provided on the outermost layer.

[0016] In practical use:

[0017] 1) In the preliminary preparation stage, after the test engine is fixed on the test bench, the position of the heat exchanger 9 is adjusted to be close to the position of the engine 7, the pipe length is shortened, and the position is fixed. Then, the heat exchange fixing base 8 is used to fix the test bench iron floor. Finally, the engine 7 and the heat exchanger 9 are connected by stainless steel pipe 4 and stainless steel pipe quick-connect buckle 6. The preliminary connection of the entire system is completed.

[0018] 2) Noise reduction treatment for external pipelines

[0019] like Figure 2 The structure shown is achieved by wrapping the stainless steel pipe 4 with two layers of acoustic insulation: an inner layer of damping and sound insulation sleeve, and an outer layer of sound insulation cotton sleeve.

[0020] 3) Engine running normally, intercooler control mode

[0021] There are two control modes. In mode one, the electromagnetic control valve 3 is directly controlled to control the water flow into the heat exchanger 9, which exchanges heat with the engine airflow to achieve the intercooling effect. In mode two, the intercooler temperature sensor 2 provides feedback signal, and the opening of the electromagnetic control valve 3 is determined based on the feedback temperature to control the water flow into the heat exchanger 9, which exchanges heat with the engine airflow to achieve the intercooling effect and meet the intercooling temperature control requirements.

[0022] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A noise-reducing quick-connect NVH intercooling system, characterized in that: The system includes a secondary control instrument, an intercooler temperature sensor, an electromagnetic control valve, a stainless steel pipe, an external cooling water inlet pipe, stainless steel pipe quick-connect clips, an engine, a heat exchange mounting base, and a heat exchanger. The external cooling water inlet pipe is connected to the water pipe of the heat exchanger via the electromagnetic control valve. The air inlet and outlet pipes of the heat exchanger's air pipe are connected to the engine's exhaust pipe and intake pipe, respectively, via stainless steel pipes. Stainless steel quick-connect clips are provided at the front and rear ends of the stainless steel pipe. An intercooler temperature sensor is installed at the outlet pipe of the heat exchanger's air pipe. The intercooler temperature sensor and the electromagnetic control valve are electrically connected to the secondary control instrument.

2. The silencing quick-connect NVH intercooling system according to claim 1, characterized in that: The heat exchanger is mounted on a heat exchange fixed base.

3. The silencing quick-connect NVH intercooling system according to claim 1, characterized in that: The stainless steel pipe is equipped with two layers of acoustic wrapping. A damping sound insulation sleeve is installed on the outer layer of the inner stainless steel pipe, and a sound insulation cotton sleeve is installed on the outermost layer.

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