Sunday, September 30, 2012

MECHANICAL POWER STEERING WORKING

WORKING OF ELECTRIC POWER STEERING

MARUTI SUZUKI TO LAUNCH "ALL NEW ALTO 800"

Maruti has planned to launch its new version of  "ALTO 800".It is seen that maruti will launch its new version within a couple of months.

       The all new alto 800 has been configured with better fuel efficiency and with better leg room for rear passengers.The company has estimated it with a fuel efficiency of  23kmpl (petrol).It also has a good design and better gear shift comparing with the older version of alto 800.

The new alto was designed to overcome the tough situations prevailing in Indian market like hike in interest price,petrol price hike etc..Due to the hike in petrol price the sale of small petrol cars have fallen down and in Maruti Suzuki it has been fallen to 34.38 percent.The company has sold 3.08 lakh unit this year and it stood with 3.80 lakh last year.It is estimated that till now 20 lakh alto has been sold out.

                     
The new alto is hoped to satisfy the needs of middle class car buyers.


Model: Alto 800
Year:2012
Fuel:Petrol or CNG
Mileage:23kmpl(petrol)
Price:----(Not announced)
(Model not yet released officially)

LIST OF SAFETY FEATURES IN CARS

People are looking keen on safety in cars nowadays,so this has made a number of car companies to start their R&D on "EMBEDDED ELECTRONICS" in automobiles.Some of the features which are active in the present cars are as follows.

1.ABS(Anti-Lock Braking system)
2.ESP(Electronic Stability Program)
3.EBD(Electronic Brake Distribution)
4.EBA(Electronic Brake Assist)
5.ESC(Electronic Stability Control)
6.Traction Control
7.Tire pressure monitoring systems
8.     *Cruise control
        *Adaptive cruise control
9.Cornering Braking systems
10.Airbags
11.Crumple Zones
   
                             These are some of the safety features used in present cars and many researches are going  on to a greater extent in Ultimate factories.We will discuss about these briefly in next post.

Saturday, September 29, 2012

Bugatti Veyron vs Lamborghini Aventador vs Lexus LFA vs McLaren

GEAR WORKING AND NECESSITY OF GEARS (TRANSMISSION)

 Have you ever wondered why we are using gears in car????



Here is the answer for the query.....
Just imagine going round a corner on a bicycle, you'd slow down on the approach and then use more energy to increase your speed once you'd straightened up in your new road.

Need more acceleration on a bicycle?
Then pedal harder
Need more acceleration in a car?
Then use a lower gear to make the engine work harder.

From the above statements you could have understood that going for low gears in car makes the engine work more harder and if u go for higher gears lower is the work for engine.

 The car bears the entire weight of the car along with the weight of the number of person's boarding inside.
When the car is initially is at rest i.e static.The engine of the car has to work more harder to bring the car in to dynamic position i.e moving. So the car engine has to work more harder to bring the car in to motion.And once it is set in motion the engine need not work hard as there is already a torque acting on the wheels of the car.Like wise when you shift the gears from lower to higher the work of the engine reduces.

Here is the detailed view:

1ST GEAR: Think of this gear as. "When I first move". The engine has to work hard to move the car, you and your passengers from a stationary position.

2ND GEAR: OK, 1ST gear got you going, so does the engine need to work quite so hard now that it's got you moving? That's 2ND gear.

3RD GEAR: As your speed increases and the car picks up even more momentum, the car doesn't need to work quite so hard as it did in 2ND gear. That's 3RD gear.

4TH GEAR: Now you've got your speed up to a suitable level, let's say 30mph. Your engine doesn't need to work quite so hard to maintain this chosen speed. That's 4TH gear.

5TH GEAR: This one causes confusion. Some engines run happily in 5TH gear at 30mph, others struggle.
5TH gear is best used when you have a constant speed that your engine is happy with


SO, what's happening each time I change into a higher gear?
As I move to a higher gear the engine works less to achieve the same result.



The higher my speed the higher my gear.
The lower my speed the lower my gear.

So, why do I need to change down through the gears and how do I do it?
The important rule to remember is that you are always matching the gear to the speed you're traveling.
You don't need to change down through each gear in turn.
And generally speaking you can stop in the gear you are in.



Once upon a time we were taught to change down through each and every gear, Some experienced drivers still use this method. But, it's a method that is long out of date

Imagine your Instructor says. "Take the next turning on the left"

You're going to turn from a major road to a minor road.
Let's assume that you've checked your mirrors and signaled in good time to turn left.
You've warned other road users of what you intend to do next.
What you must now do is estimate the speed you can travel at as you turn left.
Let's imagine that speed is 12mph.
OK, now you know the speed, so reduce your speed to the new known speed with the foot-brake.
Once your new correct speed is achieved now select the gear for the new speed you're traveling at, let's say it's 2ND gear.
Complete the gear change before you turn in your the new road and return the clutch before you begin to steer.
Avoid further acceleration until you, your passengers and your car are safely round the corner and straightened up in the new road.

The gear ratio of a gear train is the ratio of the angular velocity of the input gear to the angular velocity of the output gear, also known as the speed ratio of the gear train



Why We Need Gears?

Gears have neat characteristics which aid in the development of complex machineries:

Gears can reverse the direction of rotation.
It can change the speed or torque (turning force) of rotation.
It can transfer rotation to a different axis or translate rotational into linear motion or vice versa.

A continuously variable transmission (CVT) is a transmission that can change steplessly through an infinite number of effective gear ratios between maximum and minimum values. This contrasts with other mechanical transmissions that offer a fixed number of gear ratios. The flexibility of a CVT allows the driving shaft to maintain a constant angular velocity over a range of output velocities. This can provide better fuel economy than other transmissions by enabling the engine to run at its most efficient revolutions per minute (RPM) for a range of vehicle speeds.