Post #6 Brake System Design For Formula Student Race Car

Hello Everyone,

The balance bar establishes the ratio of braking force between the front and rear wheel brakes. Brake bias describes how much of the braking force is applied to the front and rear wheels, respectively. Normally, the brake bias is to the front to ensure a stable, straight line deceleration. You can easily adjust brake bias by rotating the shaft with the pedal in a relaxed position and the balance bar lock nut loosened. Turn the adjusting shaft so that it advances the spherical bearing closer to the selected master cylinder, increasing the braking force produced by that master cylinder.

For balance bar assembly, the following parts were designed in SolidWorks:.

  •  Threaded shaft
  • Clevis
  • Spherical bearing
  • Seal
  • Spherical rings
  •  Lock nuts 

A balance bar is used for brake biasing in the pedal assembly. After brake calculations for 1g deceleration, brake biasing is 68.96% for front circuit and how it changes according to deceleration is shown in the table below


Deceleration

Brake Biasing

Deceleration

Brake Biasing

0.1g

51.89

1.1g

70.86

0.2g

53.79

1.2g

72.76

0.3g

55.69

1.3g

74.65

0.4g

57.58

1.4g

76.55

0.5g

59.48

1.5g

78.45

0.6g

61.38

1.6g

80.34

0.7g

63.27

1.7g

82.24

0.8g

65.17

1.8g

84.14

0.9g

67.07

1.9g

86.03

1g

68.96

2g

87.93

For this circuit, a single piston master cylinder is designed in SolidWorks software and assembled in the 3DExperience Assembly Design Software.


​​​​​​Biasing Percentage Vs Deceleration Graph
Balance Bar
Master Cylinder









Students Involved:

@VJ ​​​​​​​

@VJ ​​​​​​​


Edu ​​​​​​​