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A.V.C COLLEGE OF ENGINEERINGMANNAMPANDAL

DEPARTMENT OF MECHANICAL ENGINEERING

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REDUCTION OF CREEK NOISE PROBLEM IN MOTOR DRIVEN POWER STEERING

(MDPS)

Guided by:P.Amithkishore, M.EAsst.professor

Project members:S.Ashik farhath (80107144007)S.Nisarudeen (80107144030)S.Paramanandham (80107144032)N.Rajmohan (80107144507)

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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 dol noise, steur 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.

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Motor Driven Power Steering(MDPS)

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Motor Driven Power Steering

A motor driven power steering system includes a steering column connected to a steering wheel.

A motor with a rotation shaft is connected to the steering column.

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Worm wheel and worm shaft are meshed and connected with the steering column.

Electronic control unit(ECU) which is a controlling device also attached with the steering column.

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NOISE PROBLEMS IN MDPS

Creek noiseRattle noiseSteur Steur noiseDol Dol noise

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Creek Noise: It is the unwanted sound occur in between the worm

shaft and motor coupler of motor driven power steering.

Reason: Less amount of Grease

design of Motor coupler

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GREASE LESS IN MOTOR

Worm shaft Motor ass’y

Less greaseLess

grease

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METHODOLOGY:

Automated Grease apply(through automated machine)

instead of Manual in between the worm shaft input and

Motor coupler .

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MANUAL AUTOMATIC

□ Motor greasing apply & spreading in the spline by manually

□ Grease applying & spreading by Automation □ Uniform spreading of the grease over the spline.

PHOTOS

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GREASE AMOUNT MONITORING

BEFORE AFTER

LIMIT SWITCH POSITION IN BOTTOM LEVEL OF CYLINDER ENSURE THE 10% AMOUNT OF THE GREASE IN RESERVOIR

LIMIT SWITCH POSITION ADJUSTED TO UP SIDE ENSURE THE 20% AMOUNT OF THE GREASE IN RESERVOIR

LIMIT SWITCH INCREASED LEVEL

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Sl.no Time Timer set

In Sec

Grease weightIn 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

Grease flow study in various time

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PROBLEM CONDITION

- RECEIVED CONDITION AFTER GREASE APPLIED CONDITION

NOISE FOUND NO NOISE

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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.

GRAPH SHOWS…

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CONCLUSION

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

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THANK YOU