An accessory belt for an engine is shown. Pulley A is attached to the engine's crankshaft and rotates clockwise. The belt tensioner consists of a frictionless idler pulley at B that is mounted to a horizontal bar D that slides in a frictionless track with a horizontal force P. Pulley C operates a hydraulic pump that requires 200 Nm. The coefficients of static friction for pulleys A and C are 0.4 and 0.6 respectively, and the radii of pulleys A and C are 110 and 80mm, respectively. Determine the minimum value of P so that belt does not slip. 130⁰ P if pulley A slips TABC, 45° D P if pulley A slips TAC P min
An accessory belt for an engine is shown. Pulley A is attached to the engine's crankshaft and rotates clockwise. The belt tensioner consists of a frictionless idler pulley at B that is mounted to a horizontal bar D that slides in a frictionless track with a horizontal force P. Pulley C operates a hydraulic pump that requires 200 Nm. The coefficients of static friction for pulleys A and C are 0.4 and 0.6 respectively, and the radii of pulleys A and C are 110 and 80mm, respectively. Determine the minimum value of P so that belt does not slip. 130⁰ P if pulley A slips TABC, 45° D P if pulley A slips TAC P min
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Transcribed Image Text:4. An accessory belt for an engine is shown. Pulley A is attached to the engine's crankshaft and
rotates clockwise. The belt tensioner consists of a frictionless idler pulley at B that is
mounted to a horizontal bar D that slides in a frictionless track with a horizontal force P.
Pulley C operates a hydraulic pump that requires 200 Nm. The coefficients of static friction
for pulleys A and C are 0.4 and 0.6 respectively, and the radii of pulleys A and C are 110 and
80mm, respectively. Determine the minimum value of P so that belt does not slip.
130°
P if pulley
TABC
A slips
45°
D
P if pulley
A slips
TAC
TAC TABC
P min
60°
155°
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