PRESENTATION AUTOMOTIVE TECHNOLOGY DJA 2013

PRESENTATION AUTOMOTIVE TECHNOLOGYDJA 2013NAMEMATRIX NUMBERMUHAMMAD RIDZUAN BIN ZUKIFLI 06DAD14F1007MUHAMAD AFHAM FIRDAUS BIN SHOHIMI06DAD14F1011MUHAMMAD NURFITRI B KAMARUL ZAMAN06DAD14F1031MOHAMAD HELMI BIN SHAMSUL OTHMAN06DAD14F1032

Mr. Normizam Bin Halid

Prepare a presentation slide about the topics given below.Topic 1 : Ignition System

-Function-Operation of contact point type ignition system-Construction and operation of distributorless ignition system

Topic 2 : Suspension System-Function-Explain types of suspension system1)Wishbone suspension system2)Mac Pherson Strut suspension system3)Multilink suspension system4)Trailing arm suspension system5)Swing arm suspension system6)Solid axle suspension systemDistinguish between independent and non-independent suspension system-Construction of shock absorber

TOPIC 1 : IGNITION SYSTEM

Function of ignition systemOperation of contact point type ignition system

Operation of contact point ignition systemConstruction and operation of distributorless ignition system

Construction of distributorless ignition system

Typical distributorless ignition schematic.

The major components of a distributorless ignition are:

Operation of distributorless ignition systemThe spark plugs are fired directly from the coils. The spark timing is controlled by an Ignition Control Unit (ICU) and the Engine Control Unit (ECU). The distributorless ignition system may have one coil per cylinder, or one coil for each pair of cylinders.

Engine Control Unit (ECU)Ignition Control Unit (ICU)Topic 2 : Suspension System

Function of suspension systemFunction of suspension systems are for vehicle's road holding/handling and braking for good active safety and driving pleasure, and keeping vehicle occupants comfortable and a ride quality reasonably well isolated from road noise, bumps, and vibrations

Type of suspension systemWishbone suspension system

Wishbone suspension systemIn automobiles, a double wishbone (or upper and lower A-arm) suspension is an independent suspension design using two (occasionally parallel) wishbone-shaped arms to locate the wheel. Each wishbone or arm has two mounting points to the chassis and one joint at the knuckle. The shock absorber and coil spring mount to the wishbones to control vertical movement. Double wishbone designs allow the engineer to carefully control the motion of the wheel throughout suspension travel, controlling such parameters as camber angle, caster angle, toe pattern, roll center height, scrub radius, scuff and more.Advantage and disadvantageMac Pherson strut suspension system

Mac Pherson strut suspension systemA MacPherson strut uses a wishbone, or a substantial compression link stabilized by a secondary link, which provides a bottom mounting point for the hub carrier or axle of the wheel. This lower arm system provides both lateral and longitudinal location of the wheel. The upper part of the hub carrier is rigidly fixed to the bottom of the outer part of the strut proper; this slides up and down the inner part of it, which extends upwards directly to a mounting in the body shell of the vehicle. The line from the strut's top mount to the bottom ball joint on the control arm gives the steering axis inclination. The strut's axis may be angled inwards from the steering axis at the bottom, to clear the tyre; this makes the bottom follow an arc when steering.Advantage and disadvantageMultilink suspension system

Multilink suspension systemA multi-link suspension is a type of vehicle suspension design typically used in independent suspensions, using three or more lateral arms, and one or more longitudinal arms. A wider definition considers any independent suspensions having three control links or more multi-link suspensions. These arms do not have to be of equal length, and may be angled away from their "obvious" direction. It was first introduced in the late 1960s on Mercedes-Benz C111, and later on their W201 and W124 series.Advantage and disadvantageTrailing arm suspension system

Trailing arm suspension systemA trailing-arm suspension, sometimes referred as trailing-link is a vehicle suspension design in which one or more arms (or "links") are connected between (and perpendicular to and forward of) the axle and a pivot point (located on the chassis of a motor vehicle). It is typically used on the rear axle of a motor vehicle. A leading arm, as used on the Citron 2CV and the M422 Mighty Mite, has an arm connected between (and perpendicular to, and to the rear of) the axle and the chassis. It is used on the front axle.

Trailing-arm designs in live axle setups often use just two or three links and a Pan hard rod to locate the wheel laterally. A trailing arm design can also be used in an independent suspension arrangement. Each wheel hub is located only by a large, roughly triangular arm that pivots at one point, ahead of the wheel. Seen from the side, this arm is roughly parallel to the ground, with the angle changing based on road irregularities. A twist-beam rear suspension is very similar except that the arms are connected by a beam, used to locate the wheels and which twists and has an anti-roll effect.Advantage and disadvantageSwing arm suspension system

Swing arm suspension systemA swing arm, or "swinging arm" (UK), originally known as a swing fork or pivoted fork, is the main component of the rear suspension of most modern motorcycles and ATVs. It is used to hold the rear axle firmly, while pivoting vertically, to allow the suspension to absorb bumps in the road.

Originally motorcycles had no rear suspension, as their frames were little more than stronger versions of the classic diamond frame of a bicycle. Many types of suspension were tried, including Indian's leaf spring suspended swing arm, and Matchless cantilevered coiled-spring swing arm. Immediately prior to and after WWII, the plunger suspension, in which the axle moved up and down two vertical posts, became commonplace. In the latter, the movement in each direction was against coiled springs.

Some manufacturers, such as Greeves, used swing arm designs for the front forks, which were more robust than telescopic forks. In particular, sidecar motocross outfits frequently use swing arm front forks. The swing arm has also been used for the front suspension of scooters. In this case it aids in simplifying maintenance. In motorcycles with shaft drive, such as the Yamaha XJ650 Maxim, the shaft housing forms the left side swing arm.Solid axle suspension system

Solid axle suspension systemA beam axle, rigid axle or solid axle is a dependent suspension design, in which a set of wheels is connected laterally by a single beam or shaft. Beam axles were once commonly used at the rear wheels of a vehicle, but historically they have also been used as front axles in rear-wheel-drive vehicles. In most automobiles, beam axles have been replaced by front and rear independent suspensions.Distinguish between independent and non-independent suspension system

INDEPENDENTNON-INDEPENDENT

Allows one wheel to move up and down with a minimum effect on the other wheels.

Movement of one wheel does NOT cause direct movement of the wheel on the other side of the car.

Has both the right and left wheels attached to the same solid axle.

When one tire hits a bump in the road, its upward movement causes a slight upward tilt of the other wheel. Hence, neither wheel is independent of the other.

Construction of shock absorber

A shock absorber (a.k.a. "damper") is a mechanical or hydraulic device designed to absorb and damp shock impulses. It does this by converting the kinetic energy of the shock into another form of energy (typically heat) which is then dissipated. A shock absorber is a type of dashpot.Pneumatic and hydraulic shock absorbers are used in conjunction with cushions and springs. An automobile shock absorber contains spring-loaded check valves and orifices to control the flow of oil through an internal pistonOne design consideration, when designing or choosing a shock absorber, is where that energy will go. In most shock absorbers, energy is converted to heat inside the viscous fluid. In hydraulic cylinders, the hydraulic fluid heats up, while in air cylinders, the hot air is usually exhausted to the atmosphere. In other types of shock absorbers, such as electromagnetic types, the dissipated energy can be stored and used later. In general terms, shock absorbers help cushion vehicles on uneven roads.In a vehicle, shock absorbers reduce the effect of traveling over rough ground, leading to improved ride quality and vehicle handling. While shock absorbers serve the purpose of limiting excessive suspension movement, their intended sole purpose is to damp spring oscillations. Shock absorbers use valving of oil and gasses to absorb excess energy from the springs. Spring rates are chosen by the manufacturer based on the weight of the vehicle, loaded and unloaded. Some people use shocks to modify spring rates but this is not the correct use. Along with hysteresis in the tire itself, they damp the energy stored in the motion of the unsprung weight up and down. Effective wheel bounce damping may require tuning shocks to an optimal resistance.

Spring-based shock absorbers commonly use coil springs or leaf springs, though torsion bars are used in torsional shocks as well. Ideal springs alone, however, are not shock absorbers, as springs only store and do not dissipate or absorb energy. Vehicles typically employ both hydraulic shock absorbers and springs or torsion bars. In this combination, "shock absorber" refers specifically to the hydraulic piston that absorbs and dissipates vibration.