In this paper, Experimental performance comparison between floating caliper ventilated discbrake unit (FL) and fixed caliper solid disc brake unit (FX) with three different profile designs of brake discs iscarried out. The three profiles of discs are normal (ND), grooved (GD) and drilled grooved (DGD) which areused during the tests. In this study, brake test rig was designed to simulate the actual environment of brakingprocess. It was used in experimental comparisons of different brake systems designs performance at differentoperation parameters during braking process. Brake oil pressure and rotor disc speed are the operationparameters that are varied during the running test. The comparisons are focused on brake force, frictioncoefficient and final friction temperature. The comparisons are carried out for brake oil pressure values 2.5, 5,7.5 and 10 [bar] and disc speed 50, 100, 150 and 200 [rpm]. By using the measured parameters fromexperimental works and mathematical calculations for brake force and friction coefficient, the comparisonswere carried out for different brake unit types and rotors designs. The results and conclusion from thecomparisons graph and trends show that, at low brake oil pressure 2.5 [bar] and constant disc speed 150[rpm], the better percentage of improvement for (FL-ND) mean brake force is 30.67% and mean frictioncoefficient is 27.94% relative to (FX- ND) and the better percentage of reduction of mean final frictiontemperature for (FL- DGD) relative to (FX- ND) is 31.71%.
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