Auto Systems

7/23/2019 Auto Systems

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AUTOMOBILE

ENGINEERING

Automobile engineering is the study ofmotor bikes, moeds, s!ooters, !"rs,

tru!ks, busses, tr"!tors "nd su!h #ehi!les$

An "utomobile m"y be defined "s " selfroelled steer"ble de#i!e !""ble of

mo#ing on l"nd$

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%"rious

systems inAutomobiles


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Body

chassis

Enginetransmission

suspension

4 wheel drive


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Types vehicles.

1. Front transverse engine with front

wheel drive

2. Front longitudinal engine with rear wheel

drive


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Front Longitudinal Engine with

Rear wheel drive


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Front Transverse Engine with

Front wheel drive


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Transmission

Clutch

ear!o"

#ropeller shaft

$ifferential

$rive shafts

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Clutch

& ' clutch (echanis( which ena!les the

rotary (otion of one shaft to !e trans(itted

to second shaft) whose a"is is coincidentwith that of first.

& Clutch is located !etween the engine and

gear !o".

& *hen the clutch is engaged) the power

flows fro( engine to the rear wheels

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Clutch

& $isengaged ,tarting the engine

,hifting the gear

,topping the vehicle -dling the engine

& Engaged when the vehicle (oving

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Function of clutch

& To per(it engage(ent or disengage(ent of agear when the vehicle is stationary and the

engine is running.

& To per(it the engine power to the roadwheels s(oothly without shoc/ to the

trans(ission syste( while setting the wheel

in (otion

& To per(it the engaging of gear when the

vehicle is in (otion without da(aging the

gear wheel11


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ear ox orTransmission This device transmits the power to the propeller

shaft changing the RPM.

It can be automatic or Manually operated.

In a car it is operated with the help of Gearlever which helps the driver the gears according

to his requirement.

In a manually operated Gear bo it ismandatory to engage the clutch and thenchange the gear.

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'uto(o!ile trans(ission


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Propeller Shaft or Drive shaft It carries the power from the Transmission or the

Gearbo to the !i"erential.

It is a long tube li#e structure made up of hardsteel.

It is provided with universal $oints at one endand the other has splines to %t it inside the yo#e.

If there are multiple shafts in the vehicle& it canbe mounted in the cross member of the frameand also can be inserted into the center bearingand mounted in the member

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erent a or ear naDrive

It is a very important device which convertsmechanical energy to Motion.

It provides less motion to the inner wheel andgreater motion to the outer wheel while the vehicleis being turned.

!rive pinion and !riven gear and Planetary gear

assy. are the important parts installed inside thehousing.

It holds the wheel hubs and brea# drums and thecylinders and also carry half ael shafts which helpin moving the vehicle

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#arts of a differential


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,uspension syste(

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&usension &ystem

& 3ses springs and shoc/a!sor!ers to provide agood ride and i(provedhandling.

& Coil 4 leaf springs)torsion !ars and airsuspension are all used.

& 5ost shoc/ a!sor!ers are

hydraulic or air operated.

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&teering &ystem

& Two types used6

& Conventional orparallelogra( steering

used on larger carsand truc/s.

& Rac/ and pinionsteering used on (ost

cars.& Conventional on

truc/s) heavyvehicles. 21
http://steeringl1notes.ppt/http://steeringl1notes.ppt/


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'ull 'r"me (h"ssis

& 3ses welded steel alloy(etal

& Cchannel or !o" fra(econstruction

& 3sed on large cars and(ost all truc/s

& 8ody (ade in separateunit and !olted to chassis

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(h"ssis Rel"ted &ystems

& 8ra/ing

syste(

& ,uspensionsyste(

& ,teering

syste(

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Br"king &ystem

& The purpose of the!ra/ing syste( is ofcourse) to stop the car.

& 8ra/es are used on allwheels and ishydraulically operated.

& Two co((on types of!ra/e asse(!lies are

used.& Disc Brakes

& Drum Brakes

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)rum Br"kes

& 3ses a dru( which

spins with the wheel.

,tationary !ra/e

shoes are pressed outfro( the inside to

cause friction.

& 3sed on rear !ra/esof (any cars.

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&t"rting &ystem

& 3ses a !attery andelectric starting (otor(cranking motor)to cran/

over the engine forstarting

& 8attery

& Cran/ing (otor

& ,olenoid

& :ey switch

& *ires27

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Auto Systems