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Test system and test method for simulating steam escape of cooling liquid of expansion valve in plateau environment

A plateau environment and test system technology, applied in the direction of internal combustion engine test, engine test, machine/structural component test, etc., can solve the problems of insufficient verification of diesel engine cooling performance, difficult detection of coolant escape, etc., to achieve accurate identification, Have a pressure-safe effect

Pending Publication Date: 2022-03-11
CHINA NORTH ENGINE INST TIANJIN
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Problems solved by technology

[0005] In view of this, the present invention aims to propose a simulated plateau environment expansion valve coolant steam escape test system to solve the problem of insufficient verification of diesel engine cooling performance caused by simulated environmental conditions, and it is difficult to detect different openings of the expansion valve under real vehicle plateau conditions. Problems with coolant escape under pressure

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  • Test system and test method for simulating steam escape of cooling liquid of expansion valve in plateau environment

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Embodiment Construction

[0051] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0052] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood ...

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Abstract

The invention provides a test system and a test method for simulating cooling liquid steam escape of an expansion valve in a plateau environment, which are used for simulating the pressure of a plateau pipeline system as the back pressure of the expansion valve and simulating the working boundary of the expansion valve under the plateau condition of a real vehicle; diesel engine water pump rear pressure detection parameters are used as diesel engine safe operation control boundaries; taking the transient acceleration process of the diesel engine as a verification process, and simulating a real vehicle engine heat accumulation working condition; the steam flow between the expansion water tank and the expansion valve is used as a cooling liquid steam escape characterization parameter designed according to the opening pressure of the expansion valve; and finally, after test optimization, the rear pressure of the water pump is within a control limit range, and the steam flow is 0. The test system and the test method for simulating steam escape of the cooling liquid of the expansion valve in the plateau environment play a positive role in capturing the non-equilibrium state heat accumulation moment of a diesel engine, and can also evaluate the matching performance of a vehicle thermostat.

Description

technical field [0001] The invention belongs to the technical field of engine testing, and in particular relates to a test system and a test method for simulating plateau environment expansion valve coolant steam escape. Background technique [0002] When the vehicle is driving in the plateau area, the volume flow of the air involved in heat dissipation is proportional to the speed of the cooling fan. Due to the decrease of the atmospheric density, the quality of the cooling air decreases under the same volume flow, which reduces the heat transferred from the radiator, resulting in heat loss in the air. Severe buildup in diesel engine block and cooling system. If the opening pressure of the expansion valve of the diesel engine cooling system of the vehicle is selected according to the plain area, and the vehicle accelerates under a heavy load in the plateau environment, the hot steam accumulated in the cooling system will escape, and the cooling performance of the diesel eng...

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Application Information

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IPC IPC(8): G01M15/09G01M15/05G01M15/04G01M15/02
CPCG01M15/09G01M15/05G01M15/048G01M15/02Y02T10/12
Inventor 刘峰春孔祥鑫冀树德王宇毛玉欣
Owner CHINA NORTH ENGINE INST TIANJIN
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