The Investigation of Tractor Trains Braking at the Various Road Conditions

Abstract

There are some tractors and trailers with the one axle brakable wheels. Sometimes the tractor transport aggregates are formed only with one brakable drive axle of the tractor. Such brakes are enough to drive on virgin soils and fields, where is low speed and high rolling resistance of tractor train. However, for fully loaded tractor train driving on asphalt roads at the speed about 50 km/h, it is unclear whether will be created enough brak¬ing force Fsh which would guarantee (normalized minimal [1]) deceleration o.simiH of vehicle. Therefore, when forming various tractors transports trains, it is necessary to make carefully analysis of compatibility of braking systems of tractor and trailer, braking possibilities and effectiveness of the formed train aggregate. The known methodic of determination of main braking parameters of automotive train [2,3,4,5] do not evaluate the braking effectiveness of trac¬tor transport trains, in which some unbreakable wheels are used. Purpose of the work - carry out the theoretical investigations of braking process of tractor transport train, in which are some unbreakable wheels. Create the graphoanalitic methodic and the graphics of detennination of the main braking parameters of the tractor trains