OCTOBER 19-20, 2012 - YMCA University of Science & Technology

Proceedings of the National Conference on
Trends and Advances in Mechanical Engineering,
YMCA University of Science & Technology, Faridabad, Haryana, Oct 19-20, 2012
Fig. 9 Brake Pedal
Work done on the brake pedal (W d ) = Force applied to the brake pedal pad by the driver (Fd) x Displacement of
brake pedal
movedI
W d = Xx3 = 3X N-mm
F bp = (F d ) x (L 2 )/L 1 = (X) x (435)/142
F bp = X x 3.0634
F bp = 3.0634 X N
Output force of brake pedal assembly act on the master cylinder hydraulic piston.
Pressure = force/area
P MC = F bp /A MC
Master cylinder
D MC = 25.4 mm
A MC = (π/4) x (D MC ) 2 = (π/4) x (25.4) 2 = 506.7075 mm 2
P MC =F bp / A MC = (3.0634 X) / (506.7075) = (6.0457 x 10 -3 X) N / mm 2
By the Pascal law, fluid pressure remains same
P MC =P cal = P wc = (6.0457 x 10 -3 X) N/mm 2
In front disc brake
P cal = (6.0457 x 10 -3 X) N/mm 2
P cal = F cal x A cal
D cal = 45.4 mm
A cal = (π / 4) x (D cal ) 2 = (π / 4) x (45.4) 2 = 1618.8313 mm 2
F cal =P cal x A cal = (6.0457x10 -3 X) x 1618.8313 = (9.7842X) N
W cal = F cal x Distance the brake pad moved
W cal = (9.7842X) x Distance the brake pad
moved II
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