Engine exhaust pressurization test equipment

Abstract

The utility model discloses engine exhaust pressurization test equipment, which belongs to the technical field of engine test equipment, and comprises an exhaust manifold, and a catalyst is arranged in the exhaust manifold; the pressurization testing mechanism comprises two pressurization pumps arranged above the exhaust manifold, the air inlet ends of the two pressurization pumps are communicated with the exhaust manifold through first air conveying pipes, and a three-way electromagnetic valve is arranged above the exhaust manifold; the gas outlet ends of the two booster pumps communicate with a three-way electromagnetic valve through second gas conveying pipes, and a gas analyzer is arranged on the right side of the three-way electromagnetic valve. Aiming at the use problem, the equipment is provided with the pressurization testing mechanism, the pressure of the tail gas is increased through the booster pump, normal sampling of the gas analyzer on the tail gas during plateau simulation of the engine is ensured, the applicability is good, meanwhile, the tail gas in front of and behind the catalyst can be sampled respectively through the three-way electromagnetic valve, and the testing cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to engine test equipment technical field especially relates to a kind of engine exhaust supercharging test equipment. BACKGROUND

[0002] Engine is the device that other forms of energy is converted into mechanical energy, is the core power source of modern transport tools, mechanical equipment, it is usually required to use exhaust test equipment to detect tail gas in production process, to evaluate tail gas composition and the combustion efficiency of engine;

[0003] The existing exhaust test equipment is often assisted by internal gas analyzer to sample and analyze the tail gas of engine when using, however, since the sampling pump built-in in the existing gas analyzer requires to maintain normal operation under about 80kpa ambient pressure, and the minimum pressure of plateau simulation system is usually about 47kpa, which leads to unable to meet normal sampling of tail gas by gas analyzer when engine is simulated on plateau, therefore, to solve this problem, design a kind of engine exhaust supercharging test equipment is considered by us. SUMMARY

[0004] The utility model discloses a kind of engine exhaust supercharging test equipment to solve the shortcomings in prior art, it is set up in view of use problem Supercharging test mechanism, the normal sampling of tail gas by gas analyzer when engine is simulated on plateau is ensured by the promotion of tail gas pressure by supercharging pump, good applicability is obtained, simultaneously, through three-way electromagnetic valve, the separate sampling of tail gas before and after catalytic converter is realized, and the cost of test is reduced.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of engine exhaust supercharging test equipment, including exhaust manifold, catalytic converter is arranged in the exhaust manifold;Supercharging test mechanism, the supercharging test mechanism includes two supercharging pumps arranged above exhaust manifold, the intake end of two supercharging pumps and exhaust manifold are all communicated by first gas pipe, three-way electromagnetic valve is arranged above the exhaust manifold, the gas outlet of two supercharging pumps is all communicated with three-way electromagnetic valve by second gas pipe, gas analyzer is arranged in the right side of three-way electromagnetic valve, the intake end of gas analyzer is communicated with three-way electromagnetic valve by tail gas sampling pipe.

[0007] Preferably, the gas outlet of the gas analyzer is communicated with tail gas recovery pipe, and the other end of the tail gas recovery pipe is communicated with the exhaust manifold.

[0008] Preferably, the upper end of the exhaust manifold is communicated with two pressure relief pipes, and the other end of the two pressure relief pipes is communicated with the corresponding second gas pipe.

[0009] Preferably, each of the two first gas supply pipes is equipped with a one-way valve that allows fluid to flow in one direction from bottom to top.

[0010] Preferably, a one-way valve for unidirectional fluid flow from top to bottom is installed in both the exhaust gas recovery pipe and the two pressure relief pipes.

[0011] Preferably, the flow rate of the booster pump is ≥6L / min.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] A booster testing mechanism is installed, which can deliver exhaust gas from the exhaust manifold to a gas analyzer for analysis and evaluation. By boosting the exhaust gas pressure through a booster pump, the gas analyzer can avoid the situation where it cannot sample the exhaust gas normally when the engine is simulating high altitude. Overall, it has good applicability. At the same time, by controlling the three-way solenoid valve to switch the connection between the two second gas supply pipes and the exhaust gas sampling pipe, it is possible to sample the exhaust gas before and after the catalytic converter separately using only one gas analyzer, which effectively reduces the actual testing cost. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an engine exhaust booster testing device proposed in this utility model;

[0015] Figure 2 for Figure 1 Enlarged view of point A;

[0016] Figure 3 for Figure 1 Enlarged view of point B.

[0017] In the diagram: 1. Exhaust main pipe, 2. Catalyst, 3. Booster pump, 4. First gas supply pipe, 5. Three-way solenoid valve, 6. Second gas supply pipe, 7. Gas analyzer, 8. Exhaust gas sampling pipe, 9. Exhaust gas recovery pipe, 10. Pressure relief pipe. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figures 1-3 An engine exhaust boosting test device includes an exhaust manifold 1, which is used to transport engine exhaust gas for gas sampling. A catalyst 2 is installed inside the exhaust manifold 1, which can absorb some components in the exhaust gas for gas testing.

[0020] The system also includes a pressure testing mechanism, which consists of two booster pumps 3 located above the exhaust manifold 1. The flow rates of both booster pumps 3 are ≥6L / min, which can increase the pressure of the exhaust gas to meet the normal sampling requirements of the gas analyzer 7. The inlet ends of the two booster pumps 3 and the exhaust manifold 1 are connected through a first gas supply pipe 4. Each of the two first gas supply pipes 4 is equipped with a one-way valve that allows unidirectional fluid flow from bottom to top, allowing only the exhaust gas in the exhaust manifold 1 to flow unidirectionally into the corresponding booster pump 3. A three-way solenoid valve 5 is located above the exhaust manifold 1. The outlet ends of the two booster pumps 3 are connected to the three-way solenoid valve 5 through a second gas supply pipe 6. A gas analyzer 7 is located on the right side of the three-way solenoid valve 5. This is existing technology and can realize the detection and evaluation of the exhaust gas. The inlet end of the gas analyzer 7 is connected to the three-way solenoid valve 5 through the exhaust gas sampling pipe 8.

[0021] The gas analyzer 7 has an exhaust gas recovery pipe 9 at its outlet, and the other end of the exhaust gas recovery pipe 9 is connected to the exhaust manifold 1. The exhaust gas recovery pipe 9 is equipped with a one-way valve that allows unidirectional fluid flow from top to bottom, allowing only the exhaust gas discharged from the gas analyzer 7 to flow unidirectionally into the exhaust manifold 1. The upper end of the exhaust manifold 1 is connected to two pressure relief pipes 10, and the other end of each pressure relief pipe 10 is connected to the corresponding second gas supply pipe 6. Each pressure relief pipe 10 is equipped with a one-way valve that allows unidirectional fluid flow from top to bottom, allowing only the exhaust gas that has passed through the booster pump 3 to flow unidirectionally into the exhaust manifold 1. By opening the one-way valve in the pressure relief pipe 10, the pressure of the exhaust gas can be reduced (whether it needs to be opened can be determined according to the actual exhaust gas pressure), thereby preventing the exhaust gas pressure from being too high and affecting the normal detection of the gas analyzer 7.

[0022] In this invention, during use, the engine exhaust gas is first transported from left to right through the exhaust manifold 1. Then, the exhaust gas that has not passed through the catalyst 2 is analyzed. The three-way solenoid valve 5 is controlled so that the exhaust gas sampling pipe 8 is connected only to the second gas supply pipe 6 on the left. The boost pump 3 on the left is started so that the exhaust gas that has not passed through the catalyst 2 in the exhaust manifold 1 is transported along the path of the first gas supply pipe 4 on the left → the boost pump 3 on the left → the second gas supply pipe 6 on the left → the exhaust gas sampling pipe 8, and finally input into the gas analyzer 7 for exhaust gas analysis and evaluation. During this period, the boost pump 3 can increase the gas pressure of the exhaust gas (about 80 kPa) to ensure that the gas pressure of the exhaust gas can meet the sampling requirements of the gas analyzer 7 when performing high-altitude simulation. Finally, the exhaust gas after analysis will be transported back into the exhaust manifold 1 through the exhaust gas recovery pipe 9.

[0023] After completing the gas analysis of the exhaust gas that has not passed through the catalyst 2, the three-way solenoid valve 5 is controlled so that the exhaust gas sampling pipe 8 is connected only to the second gas supply pipe 6 on the right. Then, referring to the above operation, the exhaust gas that has passed through the catalyst 2 in the exhaust manifold 1 can be transported to the gas analyzer 7 for analysis and evaluation. In this way, the exhaust gas evaluation operation can be completed. The whole operation process is relatively convenient. By using the booster pump 3, the normal sampling of exhaust gas by the gas analyzer 7 can be effectively met when conducting high-altitude simulation. Moreover, only one gas analyzer 7 is needed to sample and analyze the exhaust gas that has not passed through the catalyst 2 and the exhaust gas that has passed through the catalyst 2, which reduces the actual testing cost.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An engine exhaust boosting test device, characterized in that, include: An exhaust manifold (1) is provided with a catalyst (2); The boosting test mechanism includes two boosting pumps (3) installed above the exhaust manifold (1). The inlet ends of the two boosting pumps (3) and the exhaust manifold (1) are connected through a first gas supply pipe (4). A three-way solenoid valve (5) is installed above the exhaust manifold (1). The outlet ends of the two boosting pumps (3) are connected to the three-way solenoid valve (5) through a second gas supply pipe (6). A gas analyzer (7) is installed on the right side of the three-way solenoid valve (5). The inlet end of the gas analyzer (7) is connected to the three-way solenoid valve (5) through a tail gas sampling pipe (8).

2. The engine exhaust turbocharging test equipment according to claim 1, characterized in that, The gas analyzer (7) has an exhaust gas recovery pipe (9) connected to its outlet end, and the other end of the exhaust gas recovery pipe (9) is connected to the exhaust manifold (1).

3. The engine exhaust boosting test equipment according to claim 2, characterized in that, The upper end of the exhaust manifold (1) is connected to two pressure relief pipes (10), and the other end of each of the two pressure relief pipes (10) is connected to the corresponding second gas supply pipe (6).

4. The engine exhaust turbocharging test equipment according to claim 1, characterized in that, Each of the two first gas pipes (4) is equipped with a one-way valve that allows fluid to flow in one direction from bottom to top.

5. The engine exhaust boosting test equipment according to claim 3, characterized in that, One-way valves for unidirectional fluid flow from top to bottom are installed in both the exhaust gas recovery pipe (9) and the two pressure relief pipes (10).

6. The engine exhaust turbocharging test equipment according to claim 1, characterized in that, The pump flow rates of both booster pumps (3) are ≥6L / min.

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