Diesel engine in-cylinder spraying and combustion visualization testing apparatus and testing method
A test device, diesel engine technology, applied in the direction of internal combustion engine testing, etc., can solve problems such as inaccurate temperature field analysis, influence of test results, complex system, etc., and achieve resource sharing, visualization, and high accuracy.
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[0054] Example 1: Multi-spray test of electronically controlled common rail diesel under anaerobic conditions.
[0055] Test conditions: a 4-cylinder electronically controlled high-pressure common rail diesel engine, fuel injection pressure 100MPa, "ω" type with boss in the combustion chamber, diesel engine speed 1500rpm, fuel injection timing -10°CA. The basic setting parameters during the test: the exposure rate is 10kHz, the image resolution is 640×480 pixels, and the exposure time is 80μs. According to the combustion chamber structure and the position of the injector nozzle, a 60° endoscope lens is selected. Replace the air in the diesel engine test cylinder with industrial purity nitrogen. The specific method is as follows: Isolate the intake air pipe of the diesel engine test cylinder from the air, and connect it to a gas cylinder filled with nitrogen through a pressure-stabilizing barrel. In this way, the cylinder cannot burn because there is no oxygen after the fuel is i...
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[0057] Example 2: On a 4105 electronically controlled high-pressure common rail diesel engine, set the diesel engine speed to the rated speed of 1500r / min and 50% load, respectively use B90E10 ethanol biodiesel and pure petrochemical diesel under the same working conditions, and use this device to measure The combustion picture is obtained, and the image processing system is used for calculation and analysis. Compared with pure petrochemical diesel, the combustion of B90E10 ethanol biodiesel has a significantly lower flame temperature in the cylinder. The maximum flame temperature is 2400K, which is about 300K lower than that of pure diesel. When the crankshaft angle is shifted backward, the soot concentration is also reduced by about 20 KL factors.
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