Abstract
Based on the STM32 library function, this design is developed a good docking with the engine, without changing the engine's original ECU. Only on the test bench, this design which connected to the device can enter the injection pulse width, so as to control the engine mixture concentration. Using this experimental device, the fuel adjustment characteristic experiment was completed on the existing engine test bed, which verified that the experimental device developed by this design had good adaptability in use. In this way, universities and research institutes can use this experimental device to easily complete the fuel adjustment characteristic experiment, and can also provide a convenient tool option for the calibration and optimization of the engine pulse spectrum.
Highlights
The initial gas mixture supply method of the gasoline engine is a carburetor, and the carburetor modulates the gas mixture required by the engine according to the operating conditions of the engine
In order to verify the effectiveness of the developed fuel adjustment characteristic experimental device, the developed device was connected to the engine test bed for bench application test
An experimental device for fuel adjustment characteristics connected to a gasoline engine is developed
Summary
The initial gas mixture supply method of the gasoline engine is a carburetor, and the carburetor modulates the gas mixture required by the engine according to the operating conditions of the engine. The way to adjust the concentration of the mixed gas by the fixed throat carburetor is to fix the throttle opening at a fixed speed, adjust the main metering hole, and change the fuel supply to obtain the fuel adjustment curve [1-3]. One of the main defects of the carburetor's fuel supply method is that the throat in the intake pipe is narrow, resulting in high air resistance and low output power. One of the main reasons is caused by the rapid development of various models of vehicles with small displacement gasoline engines as the main power source. In order to control the emissions of small gasoline engines, people continue to develop new technologies and control the use of more precise electronically controlled injection technology
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