Egr cold and hot cycle test bench with automatic control strategy and its test method
A technology of cold and heat cycle and test method, applied in the field of EGR cold and heat cycle test bench, can solve the problems of long heat source and sample inlet pipeline, high failure rate of heat loss equipment, low service life, etc., and achieves a small footprint. , Simple structure, stable operation
Active Publication Date: 2018-10-12
重庆上方汽车配件有限责任公司
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Problems solved by technology
However, the commonly used high-temperature valves have poor sealing performance, low service life, and high cost, which lead to the disadvantages of high equipment failure rates such as long heat source and sample inlet pipelines, serious heat loss, etc.
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Embodiment Construction
[0025] The EGR cooling and heating cycle test bench with an automatic control strategy of the present invention includes an air system and a water system.
[0026] refer to figure 1 , the gas path system includes a burner 22, a main gas path, an exhaust gas heat exchanger 11 and two sample branches; the main gas path includes an intake valve 1 and an air flow regulating valve 2 connected in sequence , the first preheating three-way valve 3, the second preheating three-way valve 4 and the cooling and heating switching valve 5; the first control output port of the cooling and heating switching valve 5 is connected to the burner 22, and the second control output port Connected to the sample branch through the check valve 6; the two sample branches are connected in parallel between the burner 22 and the exhaust gas heat exchanger 11, and the first sample branch includes the first sample branch connected in sequence. The gas side of the sample 23, the gas outlet heat exchanger 24,...
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The invention discloses an EGR thermal-cooling cycling test bed with an automatic control strategy and an EGR thermal-cooling cycling test method with an automatic control strategy. The test bed includes a gas path system and a water path system; the gas path system includes a burner, a main gas path, an exhaust gas heat exchanger and at least one sample piece branch path; and the water path system includes a safety valve, a water tank, a water inlet valve, a water inlet filter, a water pump, a heater, a sample piece branch path, a water heat exchanger and a backwater filter which are connected with one another sequentially. According to the test bed and the test method of the invention, three-way reversing valves are adopted, and the variable frequency regulation of a fuel pump is realized, and therefore, temperature alternating change can be realized. The test bed and the test method have the advantages of controllable high and low temperature, low failure rate, simple structure, low equipment cost, convenient maintenance and repair, small occupied space, stable operation and the like.
Description
technical field [0001] The invention relates to EGR detection equipment, in particular to the technical field of EGR cold and hot cycle test equipment, in particular to a novel EGR cold and hot cycle test bench with automatic control strategy, energy saving and reliability. Background technique [0002] At present, our equipment for EGR cold and hot cycle tests basically uses high-temperature valves to achieve the switching and alternation of temperature, flow, and pressure. High-temperature valves generally use electric or pneumatic actuators. Since this test is a high and low temperature reliability test, and the high temperature reaches 1000°C, there is a high temperature resistance requirement for the valve material. However, the commonly used high-temperature valves have poor sealing performance, low service life, and high cost, which lead to the disadvantages of high equipment failure rates such as long heat source and sample inlet pipelines, serious heat loss, etc. I...
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IPC IPC(8): G01M99/00
CPCG01M99/002
Inventor 邢俊杰蒋平灶夏立峰张国伟季叶贵陈帅
Owner 重庆上方汽车配件有限责任公司