Crankcase differential pressure balancing device for internal combustion engine plateau intake and exhaust simulation test
By designing the crankcase pressure differential balance device for plateau inlet and exhaust simulation test of internal combustion engines, the problem of pressure imbalance in existing equipment affecting the accuracy of the test is solved, and the plateau simulation and pressure differential balance of the engine are achieved, which improves the accuracy of the test and the service life of the supercharger.
Patent Information
- Application Number
- CN202421103675.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The existing plateau intake and exhaust simulation equipment failed to effectively solve the impact of pressure imbalance on the experimental process during the test, resulting in poor engine combustion and affecting the accuracy of the test.
A crankcase pressure difference balancing device for plateau inlet and exhaust simulation test of internal combustion engines was designed. Through the connection between the engine unit, the pressure difference balance simulation unit and the plateau simulation unit, an oil and gas circuit and gas pipeline are formed in series. The plateau simulation and pressure difference balancing of the engine inlet and exhaust system are achieved using components such as oil storage tank, oil transfer pump, liquid level alarm, inlet pressure stabilization tank, outlet pressure stabilization tank, Roots fan, etc.
It effectively avoids the pressure difference between the engine body and the intake and exhaust pipes, solves the problem of poor engine combustion caused by the pressure difference, makes the data collected in the test more accurate, extends the service life of the supercharger, and improves the accuracy of the engine plateau intake and exhaust simulation test.
Smart Images
Figure CN222561303U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a simulation device for vehicle production, in particular to a crankcase pressure difference balancing device for a plateau intake and exhaust simulation test of an internal combustion engine. Background Art
[0002] Nearly 60% of my country's highways are above 1,000 meters above sea level, and cars are frequently used on plateaus. Plateaus have a significant impact on the performance parameters of automobile engines, which requires car companies to conduct plateau calibration tests. However, the plateau field test environment is harsh, and the investment in equipment, personnel, and funds is large.
[0003] The engine plateau intake and exhaust simulation test room can solve this problem at a relatively low cost. The plateau intake and exhaust simulation equipment currently on the market only simulates the intake and exhaust of the engine at plateaus, but does not solve the impact of pressure imbalance on the experimental process, which leads to poor combustion of the engine and affects the accuracy of the test.
[0004] The plateau intake and exhaust simulation system is mainly composed of Roots blower, intake pressure regulating tank, exhaust pressure regulating tank, intake air conditioner, exhaust cooler, electric valve, intake and exhaust pipelines and control unit. The Roots blower is used to draw negative pressure from the engine intake and exhaust pipelines, and the airflow entering the pressure regulating tank is stable. The control unit adjusts the intake and exhaust pressure at different altitudes by adjusting the electric valve PID. The intake air conditioner controls the intake temperature at different altitudes, and the exhaust cooler cools the high-temperature exhaust gas of the engine. Utility Model Content
[0005] The utility model provides a crankcase pressure difference balancing device for an internal combustion engine high-altitude intake and exhaust simulation test, which is used to solve the technical problems arising from the above-mentioned background technology.
[0006] A crankcase pressure difference balancing device for plateau intake and exhaust simulation test of an internal combustion engine comprises an engine unit, a pressure difference balancing simulation unit and a plateau simulation unit, and is characterized in that the engine unit, the pressure difference balancing simulation unit and the plateau simulation unit are connected correspondingly, the engine unit is provided with an engine intake pipe and an engine exhaust pipe, the engine unit is provided with a crankcase and a supercharger, the pressure difference balancing simulation unit is provided with an oil storage tank and an oil pump, the crankcase, the supercharger, the oil storage tank and the oil pump form a loop through the oil pipe, the plateau simulation unit is provided with an intake pressure stabilizing tank, an outlet pressure stabilizing tank, an air intake air conditioner and a Roots blower, the air intake air conditioner is connected to the intake pressure stabilizing tank through a ventilation pipeline, the intake pressure stabilizing tank is connected to the outlet pressure stabilizing tank, the outlet pressure stabilizing tank is connected to the Roots blower and the ventilation pipeline, the engine intake pipe is connected to the intake pressure stabilizing tank, the engine exhaust pipe is connected to the outlet pressure stabilizing tank, and an air extraction pump is connected to the upper end of the engine exhaust pipe and the oil storage tank.
[0007] Preferably, a crankcase pressure difference balancing device for an internal combustion engine plateau intake and exhaust simulation test is characterized in that the oil storage tank is provided with a liquid level alarm.
[0008] Preferably, a crankcase pressure difference balancing device for plateau intake and exhaust simulation test of an internal combustion engine is characterized in that the ventilation pipeline of the plateau simulation unit is arranged with an electric valve, the electric valve is arranged between the intake pressure stabilizing tank, the outlet pressure stabilizing tank, the air intake air conditioner, and the Roots blower, and an air filter is provided between the air intake air conditioner and the intake pressure stabilizing tank.
[0009] Preferably, a crankcase pressure difference balancing device for an internal combustion engine plateau intake and exhaust simulation test is characterized in that the air intake air conditioner is provided with an air inlet end, and the Roots blower is provided with an air outlet end.
[0010] Beneficial effect: Adding this set of pressure balancing device can effectively avoid the pressure difference between the engine body and the intake and exhaust pipes, completely solve the problem of poor engine combustion caused by pressure difference, make the test data collected more accurate, extend the service life of the supercharger, and effectively improve the accuracy of the engine plateau intake and exhaust simulation test. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 Working structure diagram of the utility model;
[0012] In the figure: engine unit 1, engine intake pipe 101, engine exhaust pipe 102, crankcase 103, supercharger 104, pressure difference balance simulation unit 2, oil storage tank 201, oil pump 202, oil pipeline 203, vacuum pump 204, liquid level alarm 205, plateau simulation unit 3, air intake pressure stabilizing tank 301, air outlet pressure stabilizing tank 302, air intake air conditioner 303, Roots blower 304, ventilation pipeline 305, electric valve 306, air filter element 307. DETAILED DESCRIPTION
[0013] The implementation process of the utility model is described in detail below in conjunction with the accompanying drawings. The described embodiments are part of the embodiments of the utility model, but not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0014] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly stipulated and limited, the terms "set", "install", "connected" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a welded connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between the internal parts of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0015] The utility model provides Figure 1 The crankcase pressure difference balancing device for the plateau intake and exhaust simulation test of the internal combustion engine shown in the figure comprises an engine unit 1, a pressure difference balancing simulation unit 2, and a plateau simulation unit 3, and is characterized in that the engine unit 1, the pressure difference balancing simulation unit 2, and the plateau simulation unit 3 are connected correspondingly, the engine unit 1 is provided with an engine intake pipe 101 and an engine exhaust pipe 102, the engine unit 1 is provided with a crankcase 103 and a supercharger 104, the pressure difference balancing simulation unit 2 is provided with an oil storage tank 201 and an oil delivery pump 202, the crankcase 103, the supercharger 104, the oil storage tank 201, and the oil delivery pump 202 are connected by oil delivery The tube 203 forms a loop, the plateau simulation unit 3 is provided with an air intake pressure stabilizing tank 301, an air outlet pressure stabilizing tank 302, an air intake air conditioner 303, and a Roots blower 304. The air intake air conditioner 303 is connected with the air intake pressure stabilizing tank 301 through a ventilation pipeline 305, the air intake pressure stabilizing tank 301 is connected with the air outlet pressure stabilizing tank 302, the air outlet pressure stabilizing tank 302 is connected with the Roots blower 304 and the ventilation pipeline 305, the engine air intake pipe 101 is connected with the air intake pressure stabilizing tank 301, the engine exhaust pipe 102 is connected with the air outlet pressure stabilizing tank 302, and the engine exhaust pipe 102 is connected with the upper end of the oil storage tank 201 with an exhaust pump 204.
[0016] Furthermore, the oil storage tank 201 is provided with a liquid level alarm 205 .
[0017] Furthermore, the ventilation pipeline 305 of the plateau simulation unit 3 is arranged with an electric valve 306, and the electric valve 306 is set between the air intake pressure stabilizing tank 301, the air outlet pressure stabilizing tank 302, the air intake air conditioner 303, and the Roots blower 304, and an air filter 307 is provided between the air intake air conditioner 303 and the air intake pressure stabilizing tank 301.
[0018] Furthermore, the air inlet air conditioner 303 is provided with an air inlet end, and the Roots blower 304 is provided with an air outlet end.
[0019] The crankcase 103 and the supercharger 104 in the engine unit 1 are connected to the oil tank 201 and the oil pump 202 of the pressure difference balance simulation unit 2 through the oil circuit to form an oil circuit loop. The oil tank 201 is provided with a liquid level alarm 205 to detect the amount of oil in the oil tank 201. The plateau simulation unit 3 includes an intake pressure stabilizing tank 301, an exhaust pressure stabilizing tank, an intake air conditioner, and a Roots blower 304. The intake air conditioner, the intake pressure stabilizing tank 301, the exhaust pressure stabilizing tank, and the Roots blower 304 are connected in series through a gas pipeline. The simulated plateau gas enters through the intake air conditioner, passes through the intake pressure stabilizing tank 301, the exhaust pressure stabilizing tank, and the Roots blower 304, and is discharged through the Roots blower 304. An electric valve 306 and an air filter 307 are provided on the gas pipeline between the intake pressure stabilizing tank 301 and the intake air conditioner. An electric valve 306 and an air filter element 307 are provided on the ventilation pipeline 305 between the intake pressure stabilizing tank 301 and the exhaust pressure stabilizing tank. An electric valve 306 is provided between the blower 304 to control the flux of the simulated plateau gas. The engine intake pipe 101 and the engine exhaust pipe 102 pass through the pressure difference balance simulation unit 2 and the plateau simulation unit 3. The engine intake pipe 101 is connected to the intake pressure stabilizing tank 301, and the engine exhaust pipe 102 is connected to the exhaust pressure stabilizing tank and a cooler is provided in between. The engine exhaust pipe 102 is connected to the upper end of the oil storage tank 201 through a branch gas pipeline through an air pump 204. The air pressure balance of the oil storage tank 201 is achieved by extracting the gas in the oil storage tank 201 to ensure normal oil supply. The oil storage tank 201 is used to store the return oil of the supercharger 104, which can play a role in oil and gas separation; the liquid level alarm 205 is used for the oil level alarm 205 of the oil storage tank 201; the oil pump 202 is used to pump the engine oil in the oil storage tank 201 back to the oil pan of the crankcase 103 of the engine unit 1. During the plateau simulation experiment, the oil return pipe of the engine supercharger 104 is connected to the oil inlet of the oil storage tank 201, the oil outlet of the oil storage tank 201 is connected to the oil inlet of the oil pump 202, and the outlet of the oil pump 202 is connected to the engine crankcase 103. The engine unit 1, supercharger 104, oil storage tank 201, oil pump 202, and crankcase 103 are circulated. At the same time, the air suction port of the oil storage tank 201 is connected to the engine exhaust pipe 102, forming a plateau simulation cycle, oil storage tank 201, and crankcase 103. The two cycles effectively reduce the generation of pressure difference through the oil storage tank 201.
[0020] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A crankcase pressure difference balancing device for an internal combustion engine high-altitude intake and exhaust simulation test, comprising an engine unit (1), a pressure difference balancing simulation unit (2), and a high-altitude simulation unit (3), characterized in that The engine unit (1), the pressure difference balance simulation unit (2), and the plateau simulation unit (3) are connected correspondingly; the engine unit (1) is provided with an engine intake pipe (101) and an engine exhaust pipe (102); the engine unit (1) is provided with a crankcase (103) and a supercharger (104); the pressure difference balance simulation unit (2) is provided with an oil storage tank (201) and an oil delivery pump (202); the crankcase (103), the supercharger (104), the oil storage tank (201), and the oil delivery pump (202) form a loop through the oil delivery pipe (203); the plateau simulation unit (3) is provided with an intake pressure stabilizing tank (301), an outlet pressure stabilizing tank (302), and an intake pressure stabilizing tank (303). The air intake pressure stabilizing tank (302), the air intake air conditioner (303), and the Roots blower (304); the air intake air conditioner (303) is connected to the air intake pressure stabilizing tank (301) through a ventilation pipeline (305); the air intake pressure stabilizing tank (301) is connected to the air outlet pressure stabilizing tank (302); the air outlet pressure stabilizing tank (302) and the Roots blower (304) are connected to the ventilation pipeline (305); the engine air intake pipe (101) is connected to the air intake pressure stabilizing tank (301); the engine exhaust pipe (102) is connected to the air outlet pressure stabilizing tank (302); and the engine exhaust pipe (102) and the upper end of the oil storage tank (201) are connected to an air extraction pump (204).
2. The crankcase pressure difference balancing device for the internal combustion engine high-altitude intake and exhaust simulation test according to claim 1 is characterized in that The oil storage tank (201) is provided with a liquid level alarm (205).
3. The crankcase pressure difference balancing device for the internal combustion engine high-altitude intake and exhaust simulation test according to claim 1 is characterized in that The ventilation pipeline (305) of the plateau simulation unit (3) is provided with an electric valve (306), the electric valve (306) is arranged between an air intake pressure stabilizing tank (301), an air outlet pressure stabilizing tank (302), an air intake air conditioner (303), and a Roots blower (304), and an air filter element (307) is provided between the air intake air conditioner (303) and the air intake pressure stabilizing tank (301).
4. The crankcase pressure difference balancing device for the plateau intake and exhaust simulation test of an internal combustion engine according to claim 1 is characterized in that The air inlet air conditioner (303) is provided with an air inlet end, and the Roots blower (304) is provided with an air outlet end.