A V C COLLEGE OF ENGINEERING MANNAMPANDAL DEPARTMENT

A. V. C COLLEGE OF ENGINEERING MANNAMPANDAL DEPARTMENT OF MECHANICAL ENGINEERING 1

REDUCTION OF CREEK NOISE PROBLEM IN MOTOR DRIVEN POWER STEERING (MDPS) Guided by: P. Amithkishore, M. E Asst. professor Project members: S. Ashik farhath (80107144007) S. Nisarudeen (80107144030) S. Paramanandham (80107144032) N. Rajmohan (80107144507) 2

ABSTRACT: Now a days need of automobile such as cars, heavy trucks , containers. . etc, are keep on increasing. But at the same time, problems in automobiles also increases. Our project is in the steering system particularly in Motor Driven Power Steering (MDPS) system. In this system, various noises like rattle noise, creek noise, dol noise, steur noise produced. Among these noises, creek noise is the major problem produce in MDPS. So we have to do the project in this noise. In this MDPS, creek noise happens in between the worm shaft and motor. This noise is produced because of two factors such as less amount of grease and the coupler design of motor in MDPS. 3

Motor Driven Power Steering(MDPS) 4

Motor Driven Power Steering Ø A motor driven power steering system includes a steering column connected to a steering wheel. Ø A motor with a rotation shaft is connected to the steering column. 5

Contd… Ø Worm wheel and worm shaft are meshed and connected with the steering column. Ø Electronic control unit(ECU) which is a controlling device also attached with the steering column. 6

NOISE PROBLEMS IN MDPS Ø Creek noise Ø Rattle noise Ø Steur noise Ø Dol noise 7

Creek Noise: It is the unwanted sound occur in between the worm shaft and motor coupler of motor driven power steering. Reason: Ø Less amount of Grease Ø design of Motor coupler 8

GREASE LESS IN MOTOR Less grease Worm shaft Motor ass’y 9

METHODOLOGY: Ø Automated Grease apply(through automated machine) instead of Manual in between the worm shaft input and Motor coupler. 10

AUTOMATIC PHOTOS MANUAL □ Motor greasing apply & spreading in the spline by manually □ Grease applying & spreading by Automation □ Uniform spreading of the grease over the spline. 11

q GREASE AMOUNT MONITORING BEFORE AFTER LIMIT SWITCH INCREASED LEVEL v LIMIT SWITCH POSITION IN BOTTOM LEVEL OF CYLINDER v ENSURE THE 10% AMOUNT OF THE GREASE IN RESERVOIR v LIMIT SWITCH POSITION ADJUSTED TO UP SIDE v ENSURE THE 20% AMOUNT OF THE GREASE IN RESERVOIR 12

v Grease flow study in various time Sl. n o Timer set In Sec Grease weight In gm 1 3. 15 PM 3. 4 1. 0 2 3. 40 PM 3. 4 1. 0 3 3. 55 PM 3. 4 1. 0 4 4. 15 PM 3. 4 1. 0 5 4. 30 PM 3. 4 1. 0 6 4. 45 PM 3. 4 1. 0 7 5. 00 PM 3. 4 1. 0 8 5. 15 PM 3. 4 1. 0 9 5. 30 PM 3. 4 1. 0 10 6. 45 PM 3. 4 1. 0 13

PROBLEM CONDITION - RECEIVED CONDITION AFTER GREASE APPLIED CONDITION NOISE FOUND NO NOISE 14

GRAPH SHOWS… Ø From the graph, we come to know that the noise level in the MDPS is “very much below to the acceptable limit” through the performance tester machine. Hence the creek noise produced in the power steering is reduced. 15

CONCLUSION • Hence the creek noise in the “MOTOR DRIVEN POWER STEERING” is reduced within the limit by means of automatic application of grease. 16

THANK YOU 17