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Engine Experimental Report (Engine Performance Test and DigiPlusAnalysis Experimental Report) Abstract: This experiment conducted a performance test and analysis of a certain engine. The specific experimental content is: to determine the dynamics, fuel economy and Emission and other parameters, and analyze them to find out the influencing factors.The experimental results show that the maximum power of the engine occurs when the speed is 6000rpm, the maximum torque occurs when the speed is 4000rpm, and the fuel economy is optimal when the speed is 3000rpm. At different speeds, the emission rate is CO2: 2.8%-3.5%, HC: 5-15ppm, and NOx: 10-20ppm, among which the NOx emission is slightly higher than the other two. Through analysis, we believe that the main factor affecting the performance of the engine is the air intake. How to improve the air intake can improve the performance of the engine. 1. The purpose of the experiment: to study the performance indicators of an engine, understand its dynamic, fuel economy, emission and other parameters, and analyze them to find out the factors affecting the performance. Two. Experimental principle: The engine used in this experiment is produced by an automobile manufacturer 3.0L V6 engine, with 6 cylinders. The performance parameters are as follows: maximum power: 120kW maximum torque: 250Nm displacement: 3.0L This experiment mainly determines the following parameters: maximum power, maximum torque, fuel economy, emission, etc. 3. Experimental steps: 3.1 Experimental instruments, equipment and materials: 3.0L V6 engine, engine testing equipment, computer, fuel, toolbox, etc. produced by a manufacturer. 3.2 Experimental process: 3.2.1 Determine the test environment: The test environment of this experiment is an indoor environment with a temperature of 25°C, a humidity of 50%-60%, and an altitude of 100 meters. 3.2.2 Preparation: a. Put the engine sample on the test platform. B. Connect the computer and the engine detection equipment.C. Ensure the normal operation of relevant instruments and equipment. D. Select the standard fuel to inject into the engine, turn on the engine, and let it idle for 5 minutes to fully preheat the engine. 3.2.3 Experimental test: a. Determine the maximum power and maximum torque of the engine: gradually increase the speed of the engine, and record the output power and torque of the engine at the same time. When the output power and torque of the engine reach the maximum value, the corresponding speed recorded is the maximum power and maximum torque of the engine. B. Determine the fuel economy of the engine: At different speeds, the fuel consumption and driving distance of the engine are determined respectively, and the fuel economy of the engine is calculated according to the calculation formula. C. Determine the emission performance of the engine: at different speeds, determine the size of CO2, HC and NOx of the gas emitted by the engine.3.3 Data processing: a. Draw a curve chart: Use the measured data to draw a curve chart and analyze the change law of engine parameters. B. Computer processing: Process data through computer software, find out the inflection point of engine parameters, and determine the main factors affecting engine performance. Four. Experimental results: 4.1 Engine performance parameters: the maximum power appears when the rotation speed is 6000rpm, the maximum torque appears when the rotation speed is 4000rpm, and the fuel economy is optimal when the rotation speed is 3000rpm. 4.2 Engine emission content: at different speeds, the emission is CO2: 2.8%-3.5%, HC: 5-15ppm, NOx: 10-20ppm respectively. Among them, NOx emissions are slightly higher than those of the other two.4.3 Influencing factors: Through analysis, we believe that the main factors affecting the performance of the engine are the air intake. How to improve the air intake can improve the performance of the engine. 5. Experimental conclusion: Through this experiment, we have an in-depth understanding of the performance index of this engine and found that the air intake is the main factor affecting the performance of the engine. These results are of important guiding significance for optimizing the design of the engine and improving its performance. 6. Experimental perception: Through this experiment, I deeply realized that doing experiments is a very important job. You can't really understand the actual situation just by understanding the relevant principles from books. Only through personal experience in the experiment can we have a deeper understanding of the meaning and master the characteristics and methods of experimental skills. At the same time, it also makes me realize that learning can only be closely combined with real life to better promote the accumulation of knowledge and improve the learning effect.

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