Research Of A New Type Of Electromagnetic Energy-saving Device For Vehicle

Aiming at the problem of the energy and environmental protection, some measures have been taken to encourage research and development of automotive energy-saving and exhaust reduction by every country. Fuel magnetization is one kind of the technology of automotive energy-saving and emission reduction. The results of experiment indicate that the atomization effect of the fuel becomes better, the fuel burns more sufficiently and the effect of fuel saving and emission reduction is more obvious after the fuel magnetized. A new type of electromagnetic energy-saving device for vehicle was designed after further investigating the mechanism of the fuel magnetization in this thesis.The fuel economy, exhaust smoke of diesel engine, the infrared absorption spectrum and surface tension of fuel which was magnetized were studied through abundant experiments. Comparative analysis of the fuel economy and exhaust smoke of the diesel engine was conducted under different magnetic filed intensities. At the same time, the relations between magnetic field intensities and the infrared absorption spectrum, surface tension of fuel were also analyzed. The results indicate that the fuel consumption and exhaust smoke decrease to some degree after the fuel magnetized. Under the different speed and load conditions, the needed magnetic field intensities to meet optimum performance of the fuel economy and exhaust smoke are different after magnetized. The peak strengths of infrared absorption spectrum of the fuel increase after magnetization, moreover, they enhance grow with the magnetic field intensities increasing. The surface tension of fuel decreases after the fuel magnetized, at the same time, they become smaller with the magnetic field intensities increasing. Therefore, an electromagnetic device which changes the magnetic field intensities under different speed and load conditions is designed. So the effects of the fuel saving and emission reduction become more better.The electromagnetic energy-saving device judges the engine condition according to the input signal of flow sensor which contrasts with the standardized value in order to determine the required magnetic field intensities which achieves the best magnetization effect. The voltage of magnetizer is controlled by PWM (Pulse-Width Modulation) for the purpose of changing the magnetic field intensities. This electromagnetic device produces magnetic field by axisymmetric air-core coils. The calculation model of coils is established based on the electromagnetic field essential theory. First, a calculation model of single coil is set up, and then axisymmetric air-core coils are also established. At the same time, a simulation calculation of magnetic field is conducted by using MATLAB software. At last, the design parameters of coils are completed.The control part of the electromagnetic energy-saving device is conducted by MCU. The hardware functions and structures of electromagnetic energy-saving devices are provided. And the principle functions of each module are analyzed, including turbine flow meters, temperature sensors, AT89S52 MCU pin and functions, optical coupling treatment, chopper circuits, FET drive circuit and display circuit. The flow chart of this system control software is given based on the hardware circuit design. Finally, assembly of the electromagnetic energy-saving devices is completed and the magnetic field strength is tested. The results indicate that the electromagnetic energy-saving device satisfies the design requirements.