CN219956901U - Engine bench test system based on gas mixing system - Google Patents

Abstract

An engine bench test system based on a gas mixing system belongs to the technical field of engines. Not only can the performance test of multiple mixed gases be carried out, but also the knocking data test can be carried out, and the test performance is more comprehensive and accurate. The gas in the gas cylinder is filled by the gas mixing device, the corner mark instrument and the spark plug cylinder pressure sensor transmit signals for the combustion analyzer, the combustion analyzer transmits collected information to the control system, the knocking sensor transmits signals to the signal processing unit, the signal processing unit transmits collected information to the control system, the sound intensity probe and the acceleration sensor respectively collect engine noise and engine vibration acceleration, and transmit signals to the noise vibration tester, and the noise vibration tester transmits information to the control system. The bench test system of the utility model can accurately test the combustion data and the gas emission data of the engine, and can test the knocking data of the engine through the noise vibration tester and the knocking sensor.

Description

Engine bench test system based on air mixture system

Technical field

The utility model belongs to the field of engine technology, and specifically relates to an engine bench testing system based on a mixture system.

Background technique

The engine development and upgrade stage requires a large amount of bench testing and various data tests. Currently, the air intake function of the engine bench test is relatively simple and can only provide one or two mixed gases, which easily limits the follow-up of the engine. Testing, in addition, providing an engine bench with more comprehensive testing performance is also an urgent technical problem that needs to be solved by those skilled in the art.

Utility model content

The purpose of this utility model is to provide an engine bench testing system based on a gas mixture system, which can not only perform performance testing of multiple mixed gases, but also perform detonation data testing, making the testing performance more comprehensive and accurate.

The technical solution adopted by this utility model is:

Engine bench test system based on mixture device, including cylinder, control system, signal processing unit, knock sensor, angle indicator, combustion analyzer, spark plug cylinder pressure sensor, acceleration sensor, sound intensity probe and noise vibration tester ; The gas in the cylinder is filled by a gas mixing device. The gas nozzle of the cylinder is connected with the air inlet of the engine cylinder to supply air to the engine. The measuring probe of the angle marker is installed on the cavity of the engine cylinder. , the angle indicator and the spark plug cylinder pressure sensor transmit signals to the combustion analyzer, and the combustion analyzer transmits the collected information to the control system. The knock sensor is installed on the engine cylinder, and the knock sensor transmits the signal to the signal processing unit. The signal processing unit then transmits the collected information to the control system. The sound intensity probe and acceleration sensor collect the engine noise and engine vibration acceleration respectively, and transmit the signals to the noise and vibration tester. The noise and vibration tester transmits the information. to the control system.

Compared with the existing technology, the utility model has the following beneficial effects:

The bench test system of the utility model can accurately test the combustion data and gas emission data of the engine, and can test the knock data of the engine through the noise vibration tester and the knock sensor. The test gas of the utility model is controlled by the gas mixing device and can better test the impact of the mixing data of various gases on the engine.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model;

Figure 2 is a schematic structural diagram of the gas mixing device of the present utility model;

Figure 3 is a schematic diagram of the principle of the utility model;

Among them: 1. Gas cylinder; 2. Control system; 3. Signal processing unit; 5. Engine cylinder; 6. Knock sensor; 7. Angle indicator; 8. Combustion analyzer; 9. Gas emission detector; 10. Spark plug cylinder pressure sensor; 11. Acceleration sensor; 12. Gas nozzle; 13. Intake valve; 14. Sound intensity probe; 15. Noise and vibration tester; 16. Pressure regulator; 17. Solenoid valve; 18. Pressure sensor; 19. Gas source bottle; 20. Heat exchanger; 21. Filter; 22. Mass flow controller.

Detailed ways

In order to better understand the purpose, structure and function of the present utility model, the present utility model will be described in further detail below in conjunction with the accompanying drawings.

Referring to Figures 1 and 3, the engine bench test system based on the air mixing device of the present invention includes a gas cylinder 1, a control system 2, a signal processing unit 3, a knock sensor 6, an angle indicator 7, and a combustion analysis Instrument 8, spark plug cylinder pressure sensor 10, acceleration sensor 11, sound intensity probe 14 and noise vibration tester 15; the gas in the cylinder 1 is filled by the gas mixing device, the gas nozzle 12 of the cylinder 1 is connected with the inlet of the engine cylinder 5 The air passages are connected to supply air to the engine. The measurement probe of the angle marker 7 is installed on the cavity of the engine cylinder 5 for collecting the angle marker signal of the engine cylinder 5. The spark plug cylinder pressure sensor 10 is installed on the engine cylinder 5. At the spark plug, the angle indicator 7 and the spark plug cylinder pressure sensor 10 transmit signals to the combustion analyzer 8. The combustion analyzer 8 transmits the collected information to the control system 2. The knock sensor 6 is installed on the engine cylinder 5 for The knock information of the engine cylinder 5 is collected. The knock sensor 6 transmits the signal to the signal processing unit 3. The signal processing unit 3 then transmits the collected information to the control system 2. The sound intensity probe 14 is placed close to the engine cylinder 5. The acceleration sensor 11 Installed on the engine cylinder 5, the sound intensity probe 14 and the acceleration sensor 11 collect engine noise and engine vibration acceleration respectively, and transmit the signals to the noise and vibration tester 15, which transmits the information to the control unit. System 2.

The combustion analyzer 8 collects the pressure signal in the engine cylinder 5 through the spark plug cylinder pressure sensor 10, and at the same time collects the angle signal through the angle meter 7, and records the pressure signal in the cylinder according to the pulse of the angle meter. The noise and vibration tester 15 collects the vibration acceleration and engine noise of the engine cylinder 5 through the acceleration sensor 11 and the sound intensity probe 14 . The test effect is more accurate using this method.

An air probe of a gas emission detector 9 is installed on the exhaust passage of the engine cylinder 5 . The gas emission detector 9 is used to detect and analyze the gas emitted by the engine and transmit the information to the control system 2 .

A pressure sensor 18 , a solenoid valve 17 , and a pressure regulator 16 are installed in sequence on the gas pipeline of the gas cylinder 1 . The pressure sensor 18 , the solenoid valve 17 , and the pressure regulator 16 are all connected to the control system 2 . The control system is also used to control the intake valve 13 of the engine cylinder 5 and the gas nozzle 12 of the cylinder 1 .

As shown in Figure 2, the gas mixing device includes multiple gas source bottles 19, multiple heat exchangers 20, multiple filters 21 and multiple mass flow controllers 22; the gas outlet of each gas source bottle 19 The ends are respectively connected to the corresponding heat exchanger 20, filter 21, and mass flow controller 22. The outgoing end of each mass flow controller 22 is connected to the gas cylinder 1 respectively.

Solenoid valves are installed on each pipe of the gas mixing device, and each solenoid valve is controlled by the control center of the gas mixing device.

The gas mixing device can not only select the amount of mixed gas and the components of the mixed gas accurately, but also can charge a single gas into the gas cylinder 1, which is more convenient.

Accurate mixing of multi-channel gases also enables engine performance testing of the engine bench test system in cylinder 1.

The engine bench test system of the present invention is also equipped with a fuel consumption meter and a thermal management system, which are connected to the engine cylinder 5, and equipped with a frequency converter and a transformer connected to the control system.

It can be understood that the present invention has been described through some embodiments. It is known to those skilled in the art that various changes or equivalents can be made to these features and embodiments without departing from the spirit and scope of the present invention. replace. In addition, in light of the teachings of the invention, modifications may be made to adapt the features and embodiments to a particular situation and material without departing from the spirit and scope of the invention. Therefore, the present utility model is not limited by the specific embodiments disclosed here, and all embodiments falling within the scope of the claims of the present application belong to the scope of protection of the present utility model.

Claims (5)

1. An engine bench test system based on mixing gas device, its characterized in that: the device comprises a gas cylinder (1), a control system (2), a signal processing unit (3), a knock sensor (6), an angle marker (7), a combustion analyzer (8), a spark plug cylinder pressure sensor (10), an acceleration sensor (11), a sound intensity probe (14) and a noise vibration tester (15); the gas in gas cylinder (1) is filled by mixing gas device, gas nozzle (12) and the intake duct intercommunication of engine cylinder (5) of gas cylinder (1), for engine air feed, the measuring probe of angle indicator (7) is installed on the cavity of engine cylinder (5), angle indicator (7) and spark plug jar pressure sensor (10) are combustion analysis appearance (8) transmission signal, combustion analysis appearance (8) are with the information transfer who gathers control system (2), knock sensor (6) are installed on engine cylinder (5), knock sensor (6) are with signal transfer for signal processing unit (3), signal processing unit (3) are with the information transfer who gathers control system (2) again, engine noise and engine vibration acceleration that sound intensity probe (14) and acceleration sensor (11) gathered respectively to give noise vibration tester (15) with the signal transfer, noise vibration tester (15) are with information transfer for control system (2).

2. The air mixing device based engine bench test system of claim 1, wherein: an air probe of a gas emission detector (9) is arranged on an exhaust passage of the engine cylinder (5), and the gas emission detector (9) is used for detecting and analyzing gas emitted by the engine and transmitting information to the control system (2).

3. The air mixing device based engine bench test system of claim 2, wherein: the gas transmission pipeline of the gas cylinder (1) is sequentially provided with a pressure sensor (18), an electromagnetic valve (17) and a pressure regulator (16), and the pressure sensor (18), the electromagnetic valve (17) and the pressure regulator (16) are connected with the control system (2).

4. The air mixing device based engine bench test system of claim 3 wherein: the gas mixing device comprises a plurality of gas source bottles (19), a plurality of heat exchangers (20), a plurality of filters (21) and a plurality of mass flow controllers (22); the air outlet end of each air source bottle (19) is respectively and sequentially connected with a corresponding heat exchanger (20), a filter (21) and a mass flow controller (22), and the outlet end of each mass flow controller (22) is respectively connected with the air bottle (1).

5. The air mixing device based engine bench test system of claim 4, wherein: the control system is also used for controlling an inlet valve (13) of an engine cylinder (5) and a gas nozzle (12) of the gas bottle (1).