| As an equipment for heating bus, truck and engneering vehicle chamber and preheating engine, oil heaters have been largely used all over the world. However ,with the demand for environmental prelection inhancing ,the emission which had not been taken into account is noticed now .In order to improve heater emission and performance and to meet the full needs of users and the development of futurel automobile environment pretection, the paper which uses QN700 air oil-heater as the research objective ,theoretically analyzes , experimentally do researches ,searches for the main emission source , and brings up efficient improving methods based on the process of combustion x the characteristics of exhaust . the principle of operation .Analysis of experimental data indicates that there exist several following problems during the whole operation: first, the emission is serious and the density of HC and CO smoke is very high at on and off period. Second, there is oil dripping from the dripping vitta as a result of the fault of ignition system and combustion structure. The last, there might be accidents of disabled ignition resulted from the improper operation at the beginning.The paper adopts active measure, reconstructs parts on the equipment, and come up with micro-computer controlling system which will be used on the domestic oil heaters, taking into account the change of users'needs and the current situation all over the world ,based on machanism of emission producing and theorizition of combustion . The results show that the decrease of the emission at on and off period and the improvement of the reliability of ignition are obvious, so these reconstructive measures are effective .The reseach which reaches the intended aims, successfully resovles the problem of emission on the democratic oil heater, and conceives futurel development which can be a reference to manufacturers .The conclusions of the research have been adopted on the improvement of this type of products by the manufactures . |
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