Question: Train 1 Train 2 3 4 t = 30 t4 = 50 t = 15 t5 = 20 B t3 = 60 t6 =

Train 1 Train 2 3 4 t = 30 t4 = 50 t = 15 t5 = 20 B t3 = 60 t6 =

Train 1 Train 2 3 4 t = 30 t4 = 50 t = 15 t5 = 20 B t3 = 60 t6 = 24 7 t7 = 6 A Input 1 C 5 Output J Figure QA-3 5 The schematic diagram for a section of an automatic gearbox used to transmit power in a car is shown in Figure A-3. The engine crank is rotating the input shaft A, at a constant angular velocity of 1200 rpm. This shaft provides input to Train 1 and 2 via gears 1 and 5 respectively. In addition, the carrier of Train 1, shaft B, is fixed to the ring gear, 4, providing an extra input to Train 2. Gears 6 and 7 are compound gears. The carrier of Train 2, shaft C, is the output of the gearbox. The number of teeth for all gears are provided on the figure. Determine: a) the angular velocity and direction rotation (sense) of shaft B if the ring gear 3 is fixed. (10 marks) b) speed ratio of Train 1 when the ring gear, 3, is rotating with 300 rpm in the opposite direction to shaft A. (5 marks) c) the output angular velocity and direction of rotation when the ring gear 3 is fixed. (10 marks)

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