Automotive Wheel Alignment Principles And Detection Technology

this article in the traditional automobile wheering wheel localization theory foundation, further elaborates the automobile four turns of localizations elementary theories; Infers the automobile four turns of localizations parameters the spatial geometry relations; The union test technology base, the signal analysing and the data processing basic principle, through automobile four turns of position finders to locates aspect and so on parameter examination principle, system constitution to the automobile four turns of localizations theories and American JOHN the BEAM conducts the fundamental research, analyzed four turns of localizations surveys not to permit, the heavy not high reason, proposed correctly will use and maintains four turns of fixing aidses the basic principle, the method and the future automobile four turns of position finders development tendencies. Four turns of localizations are locate two parts by the front wheel alignment and the trailing wheel to be composed. It including wheel, Che Qiao and each kind of angle localization. Four turn locates the content includes: King pin , in king pin inclination angle, camber angle, front wheel , front wheel , trailing wheel , trailing wheel .In the examination project, the wheel value/angle, the wheel , the king pin and in the king pin the inclination angle is called as the front wheel alignment, also calls the front wheel alignment four essential factors. The automobile operation stability not merely guaranteed by the front wheel alignment that, the trailing wheel localization also is playing the very important role. In in each kind of automobile four turns of localizations adjustment, because its design different, each kind of components attrition and the operating mode are also different. Under the different engineering factor, should first carry on the localization parameter to its vehicles structure the examination, then makes the correct judgement and theadjustment. Four turns of localizations are the three-dimensional geometry succeed one of application models in the project practice. Its conformity , Che Qiao and the wheel system all geometries parameter, besides four turn decided the position angle also to contain the curve , the trailing wheel and the automobile pushed the deflection vector angle, in order to caused the automobile went when each kind of complex path or changes, the wheel all can maintain the correct angle and be vertical to the road surface. After the automobile travel certain course, various spots components all have the attrition distortion. Specially organization, because the long time comes from between the ground and the components friction, very easily creates the attrition to the part to distort, thus changed the original factory design angle, reduced the automobile performance. In order to restores it to the standard angle, must carry on four turns of localizations to it. Four turns of localizations are carry on the precision measuring through the special-purpose four turns of position finders after the vehicles, the technical personnel acts according to surveys the data and synthesizes the original factory design standard, carries on the replacement, the repair, the reshaping, the adjustment to vehicles each kind of angle and the spare part. Enables the vehicles the technical specification to meet the original factory requirements, thus guarantee automobile travel security, comfortableness, stability and efficiency. Four turns of position finders are specially use for to survey the wheel alignment parameter the equipment. Four turns of position finders may examine the project includes: The front wheel value/angle (front wheel front flare angle), camber angle, the king pin , in the king pin leans, the trailing wheel value/angle (trailing wheel front flare angle), the trailing wheel , a vehicles turn of distance, the vehicles spread of axies, changes 20 degree-hour of front flare angle, pushes the deflection vector angle and about the spread of axies is inferior. At present common domestically produced either the import four turns of position finders may use for to survey in the aboveexamination project several or the complete project. At present the commonly used four turns of position finders have the wiring type, optics type, the computer type and the computer laser type four kinds, their survey principle is consistent, only is the measuring technique which uses (or use sensor type) and the data record and the transmission way is different, the American JOHNBEAN four turns of positioning systems are the world only entire function positioning systems, simultaneously can have the diagnosis, the survey, the adjustment revises, the customer material management and the Chinese-adapted computer and so on five big functions. Four turns of position finders are composed by the metric data system and the data processing system two parts. The metric data system searches the measuring bar by 4 (sensor) and the jig, the corner plate and so on the necessary measuring tool is composed, searches the measuring bar to pass four jigs and the automobile is connected. Gives the computer main engine again by monolithic integrated circuit processing, such main engine obtains respectively searches the measuring bar the relative angle, namely various wheels angle information. American JOHN the BEAM four turns of positioning systems use 8 bunches of emissions of infrared radiation, the 8CCD receive closed-loop system, but real time display wheel data. The data processing part is four turns of position finders main engines, mainly includes the computer system, the electrical power system, its function is realizes the user to four turns of position finders operations, the data processing, demonstrated the original factory parameter and the test data, and may instruct the user to carry on the adjustment and the printing corresponding report form to the automobile localization.