Sunday, May 18, 2008 

Honda's Sci-Fi 4WD in the Acura RL/Legend Fast Cars - Now

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Honda has come up with the most amazing 4-wheel-drive system, not for off-roaders but to improve the handling and stability of fast cars. It is being used first in the new Acura RL (Honda Legend).

Why is it so advanced? This SH-AWD system has the potential to increase cornering power and cornering safety by leaps and bounds. It will be ideal for supercars as well as luxury coupes.(More information about supercars at http://www.fast-autos.com/supercars.html )

First, it allows the amount of power sent to the wheels to be varied from 30% front and 70% rear to 70% front and 30% rear. True, some other systems get near that, but this allows the system to adjust itself to completely different conditions. On top of that, it can alter the torque from zero to 100% to the left or right rear wheel.

In other words, all the power can one to the right wheel one minute, and if necessary can be reversed so that all the power goes to the other wheel in an instant. This might be needed in slushy or snowy conditions, where there was a patch of bare road for a bit on one side offering good grip, but a bit later on a bare patch on the other side.

In addition to those features, the outer rear wheel can be speeded up so that it goes faster than the inside wheel! All done continuously depending on conditions. A few years ago this would have considered desirable, but science fiction.

More power to the rear wheel for acceleration

Confused? Well, let's start with the front-to-rear power. When you accelerate, the weight of the car is thrown on to the back wheels by the force of acceleration, so you want more power to go to the back wheels - if it all goes to the front you get wheelspin. When cornering, you generally want as much or more power to the rear wheels. SH-AWD does that.

On the other hand, when you are cruising along, you want more power to the front wheels as this increases stability. SH-AWD also does that.

More power to outer rear wheel for better cornering

The side-to-side variation in power is used to improve cornering power and stability. For example, when you accelerate through a corner, extra power through the outer rear wheel counteracts understeer, letting the car corner on rails. In fact, stability control systems used on many cars now do this by reducing the amount of torque sent to the inner wheel - this means that you actually corner slower than you could do. SH-AWD lets you corner faster.

On the over-run, you don't need that, and less power is sent through the outer wheel for optimum stability. But that isn't enough because when a car corners, the outer wheels have to travel further than the inner ones - by 5-10% on very tight corners, so the outer wheel normally goes slower.

Honda overcomes this with some gears in the back axle gear set which actually drive the outer wheel faster when cornering! This improves maneuverability and cornering at low speeds.

Electro-magnetic multi-plate clutches

All this is accomplished by multi-plate clutches operated electro-magnetically - a world first - and the gear/clutch set used for acceleration. In fact, these gears also serve as the rear differential.

An advantage of the electro-magnetic clutches is that the electronic controller does not need to control a hydraulic actuation system as used normally but an electric actuator - this reduces cost and weight.

Is this the best thing since sliced bread? For the person who wants to have stability and control, and doesn't want to know what is happening to the car -yes. Such a system is bound to reduce the input the driver gets from the road.

He will be less aware of whether the surface is slippery, or whether the car is understeering more than usual because the SH-AWD system is correcting things all the time.

John Hartley is editor of http://www.fast-autos.com an online magazine devoted to fast cars and supercars. He has written from many of the world's top auto magazines, and has written about 10 books about cars and the auto industry, including 'Suspension and Steering Q&A' and 'The Electronics Revolution in the Motor Industry'. He has been writing about fast cars and testing them for over 20 years, and has been involved in race car design, and has also raced cars.

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3:49 PM | |

 

Solar Powered Cars

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The elements of nature have been created for man alone. Every single need can be acquired and it is present in nature around us. Man only needs to travel and explore the hidden treasures of nature and use them for the fulfillment of his basic needs of life. Something that doesn't need any searching shines up above in the sky. The sun is the basic source of life on earth. If there was no sun no life would have been possible.

Sun emits light which is known as the solar energy and you may have heard and studied about solar energy being used for thousands of purposes. This energy has been used for heating systems and thermal power plants are run through solar energy and so on. When you read or hear about these things you simply pass on because this is too common.

When it comes to solar powered cars it is very likely that you stop and think for a while. It is a promising future prospect and you wish you live long enough to see only solar powered cars racing down the streets, no running out gas, no waiting at the filling station, no more paying for the petrol. Imagine how quickly you would be able to increase your standard of living.

Solar powered cars have been in existence since the mid of the 19th century. They have been increasing in number year by year and organizations tend to hold solar powered car racing each year and thousands of people invest their money and bet on their solar powered cars. The mechanism of these cars is very simple. The batteries installed in these light bodied cars charge themselves from the solar energy. Then this energy is converted by them into electrical energy thus it helps the motor run.

Now this prospect is very simple or more likely it sounds very simple and trouble free. The sun shines everyday and there doesn't seem to be any such problem with these cars. But the fact is that the amount of energy stored at a time by these cars enables them to drive at a very slow pace. The road has to be leveled and not steep because that requires even more energy. It will need more powerful batteries and more storage capacity.

Have you never noticed that this is the reason why solar powered cars are small; light weighed, and can carry one person at a time? There are many technical facts that render the concept of these cars as vague.

Jonathon Hardcastle writes articles for http://worldofautomotives.com/ - In addition, Jonathon also writes articles for http://supershoppingtips.com/ and http://recreationsource.net/

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5:16 AM | |

 

Unforgettable Television Sports Cars From The 1970's

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In the seventies it seems that most shows were to an extent, known for the cars that the stars drove in them as well as the stars themselves. Some of the shows you will find listed here, the cars in the shows were even known to receive their own fan mail. The weekly hero of the action packed T.V. show was almost assuredly driving a fast and expensive sports car. Most people tend to think they used the same car in every episode but usually there was a whole team of identical cars that followed the stars through the series.

See how many of the following cars you can remember from the seventies:

1. Gran Torino on Starsky and Hutch.

This was everyones favorite Muscle Car it seemed, at least the most recognizable.

The paint job (red with that big, white stripe) and the style prompted Ford to add it to their line. Gran Torino enthusiasts still get together to show off their rides to this day!

2. Do you remember Dan Tanna and his 1957 Thunderbird from Vegas?

In this program Robert Urich played a cop in Las Vegas named Dan Tanna who just loved cruising around the strip in his T-Bird. It was a bright and shiny red and was actually two identical cars used that they switched back and forth when taping the show. The character started out with a corvette but ended up with his signature T-Bird instead

3. Who can forget that bumbling detective Columbo and his beat up, old Peugeot? Well it can be categorized as a sports car technically, but it sure didnt look like one or act like one. But Columbo and his Peugeot was a match made in heaven with their unkempt appearance. Some folks in Ohio ended up with the car after the show was cancelled but they revived it for the Columbo movie in the 80s.

4. The golden Firebird Espirit of Detective Rockford is another classic. James Garner played Detective Rockford and always seemed to be having financial troubles but he could always afford to drive around in his signature Firebird.

5. 1966 Oldsmobile Toronado from Mannix. Another one of those great detective shows. Joe Mannix was played by actor Mike Connors and it was a very customized vehicle indeed and one that most people remember. Mannix had secret compartments all over the Toronado and it was a little more high tech then many cars of its era. In later episodes Mannix had an array of cars at his disposal but the 1966 Toronado seem to make the most impact.

Each one of these cars is memorialized by film. If you asked anyone about the 70s famous cars undoubtedly they would mention one or more of these cars. Of course there were a lot of others but these five seem to be the most likely to come up in a conversation about the era. After all they certainly did seem to steal the show right out from under the human stars.

Jackson Porter is a staff writer at http://www.automobileenthusiast.com and is an occasional contributor to several other websites, including http://www.environmental-central.com.

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3:06 AM | |