In some luxurious cars: DRIVING BY WIRE!

Some luxury cars have as many as 100 devices or operations

controlled by a microprocessor. 

• •  Many cars have more lines of code than a jet fighter plane.
  But computer problems are giving car companies like Toyota a run for their money.

  If you haven’t been following Toyota’s troubles with the computers that help make its cars go, here’s a little background. Computers on wheels. Today, on Engineering Works! Listen to the podcast.

Computers and cars have been rolling along together for quite a while now. Henry Ford wouldn’t know what to think.

The first computer control unit in a production automobile seems to be one in a 1977 Oldsmobile Toronado that controlled spark plug timing in the engine. In 1978, the Cadillac Seville had a trip computer controlled by a computer chip. By 1980, electronic control units operated exhaust emission control system in several cars.

These days, microprocessor-controlled devices, or electronic control units, keep track of and operate all sorts of things. Acceleration and braking, the features that bedevil Toyota. Brakes, cruise control, engine valve timing, anti-skip brakes, traction control, door locks.

Tiny tanks of sugar and oxygen could power devices in space.

It’s not just high-end vehicles. Even basic econoboxes usually have at least 30 of them. Some luxury cars have as many as 100. And these are not simple little chips. Many of the cars and trucks we drive have at least 100-million lines of computer code on board. That’s more than many jet fighter planes.

Using computers to help operate the vehicle makes sense. They can process information from sensors in vehicle operating systems almost instantaneously and act on it much faster than human drivers can. But when something goes wrong, sometimes it’s really wrong.

Can blind person drive a car? : Car for the blind!

As crazy as this may sound, it is now close to becoming a reality. Because we are blessed with so many other senses other than vision, it is possible to give cues to blind drivers in how to react to specific situations when they are behind the wheel. The car for the blind will do this by using an array of vibrating and voice warnings that are triggered by the reaction of sensors (made up of lasers). The driver will wear a vest and gloves that will vibrate depending on various factors. The steering wheel will also vibrate. The driver will be able to interact with the car via voice commands and touch.

Whilst it may be easy to dismiss the idea as nothing short of insanity, the vehicle itself is the result of a lot of research. Because humans do not specifically rely on a single sense to drive, it is fair to assume that someone who is blind is not at a massive disadvantage in regards to operating a vehicle. Nissan has been developing systems that will force the user to slow down and even apply the brake if a driver is too close to a vehicle in front of them. It is the conglomeration of technology such as this as well as others that has made the feat possible.

Whilst an advanced prototype is still in development a very basic prototype has been developed in the form of a beach buggy. The beach buggy used a wide variety of aids to help a blind person test the vehicle with a great deal of success.  

"The next prototype (much more advanced than the buggy) is to be tested in January, 2011. "

 Instead of a beach buggy, it will be a Ford Escape. A large vehicle that is quite common to give the broadest results possible.

The next prototype (much more advanced than the buggy)

is to be tested in January, 2011.

is it car or fully featured of your gadget?: Mercedes-Benz F500 Concept Car

The F 500 Mind showcases the very latest technology

At the Tokyo Motor Show 2003, Mercedes-Benz presented the latest in a string of research vehicles which have attracted much interest and attention over the years and which provide fascinating insights into the automotive technology of tomorrow and beyond. Packaged as a modern four-door fastback saloon, the F 500 Mind mobile research lab showcases more than a dozen ideas for enhancing the safety, drive technology and comfort of future Mercedes passenger cars.

The DaimlerChrysler researchers will be using this vehicle to conduct the first practical tests of these innovative systems and pave the way for their commercialisation. The raft of innovations extends all the way from the night vision system with infrared laser headlamps to two-way doors and a programmable multivision display in the cockpit. Electronic accelerator and brake pedals, an interior pillar which provides structural rigidity and an ultrasound driver information system are further features being tested by Mercedes-Benz in the F 500 Mind.

For the powertrain, the DaimlerChrysler researchers have developed a high-performance diesel hybrid unit whose NEDC fuel consumption is up to 20 per cent lower than that of a comparable CDI engine. The state-of-the-art V8 diesel engine (184 kW/250 hp) from the S-Class has been combined with a powerful electric motor (50 kW) which is switched on and off by an electronic controller in response to traffic conditions and driving style. The electric motor can take over for example when moving off from rest, in stop-go conditions or in other situations where an internal combustion engine does not operate at optimal efficiency. When the driver demands more power, the V8 internal combustion engine cuts in to provide sharp acceleration. The 300 V battery for the electric motor is located under the passenger cell and is recharged during braking.

With a body length of 5092 millimetres and a wheelbase of 2965 mm, the F 500 Mind offers a significant gain in legroom in the rear compared with a conventional present-day saloon in this class. This was made possible by using innovative-design electronic accelerator and brake pedals which take the form of pressure-sensitive surfaces. Sensors in these “pedals” transmit the driver’s commands to the engine and SBCô brake system by means of electrical impulses. The technology takes up much less room than conventional mechanical pedals, increasing the length of the front footwell by 120 millimetres. The driver’s and front passenger’s seats can therefore be positioned further forward, so providing more space for the rear passengers. The steering, too, is controlled electronically.

Intelligent door-opening technology allows the doors to be opened in two different ways: either conventionally (both doors open forwards) or from the centre (centre-opening). In the latter mode, the B-pillar stump moves backwards with the rear door to provide a 1900 mm-wide opening for occupant entry and exit.

In the absence of full-size B-pillars, which would normally provide the all-important structural rigidity and side impact protection, the Stuttgart engineers came up with an innovative interior pillar which provides exemplary rigidity and typical Mercedes standards of occupant safety. The pillar is located in the middle of the vehicle towards the rear, and connects the reinforced floor pan to the roof structure. It also houses the air-conditioning ducts and interior lighting units.

The multivision display in the cockpit of the F 500 Mind forms the centrepiece of an innovative instrumentation and control system which offers the driver more flexible information delivery and at the same time reduces fatigue. The dials and displays in the instrument cluster are programmable and their images can be optically superposed or combined with the aid of a semitransparent mirror. In this way the driver can call up a wide range of information at the push of a button on the steering wheel. The information is always displayed directly in the driver’s field of vision where it can be seen easily and will not distract him. A further display, the central display unit, is situated above the centre console. It is linked to a touchpad whose surface is divided up in exactly the same way as the surface of the central display. By briefly touching it, the driver can control the navigation system, radio, air conditioning, telephone and other systems.

Further switches and keys in the vehicle are equipped with special sensors which can detect the driver’s approaching hand even at a distance of several centimetres. They then immediately call up the relevant function in the central display, for more convenient operation.

An advanced-design voice control system and an ultrasound-based driver information system take convenience even further. The ultrasound technology targets the sound at the driver so that only he or she can hear the information from the navigation system, the traffic news and other sound-based information sources, while the front passenger and rear passengers remain undisturbed.

In the dark or in poor visibility, the innovative night vision system projects its images onto the right-hand display. The night vision system consists of two infrared laser headlights on the front of the vehicle which “illuminate” the road with their invisible light over a range of up to 150 metres. The light reflected back from other vehicles, cyclists or pedestrians to a camera mounted on the front windscreen of the F 500 Mind is projected in black and white onto the multivision display. This allows the driver to spot hazards much earlier than in a vehicle operating on conventional dipped headlamps, which have a range of only about 40 metres. Thus Night Vision offers further opportunities for making night driving safer.

As a mobile research lab, the F 500 Mind is equipped with a special “laboratory bench” which folds out towards the rear. This allows a researcher sitting in the back of the vehicle to monitor and control the vehicle systems during testing on the proving grounds and to carry out measurements. For example the researchers are planning to use this fascinating vehicle for intensive user acceptance-testing of the innovative instrumentation and control system and for further practical testing of the diesel hybrid drive system and the Night Vision system.

latest Technology and new feature :cycle like Mercedes ?

How cool is this new Mercedes Concept Car?

It sure looks like an old-fashioned carriage, but according to Mercedes-Benz this will be the car for the future. Built with large spoked wheels, Mercedes-Benz has decided to go with traditional design features and latest technology. Good combination?

say very cool car , is powered by a hybrid drive system using an emission-free fuel cell. With a top speed of 15.5 miles an hour (25 km/h) you won´t be late for work. 

Taking a look inside this amazing car we will find carbon-fiber bucket seats with hand-stitched leather covers and a distinctively styled fiberglass front section that is inspired by Formula One racing cars. The car is controlled by a joystick instead of a regular steering wheel.

How Clutches Work ? ? ??

If you drive a manual transmission car, you may be surprised to find out that it has more than one clutch. And it turns out that folks with automatic transmission cars have clutches, too. In fact, there are clutches in many things you probably see or use every day: Many cordless drills have a clutch,chain saws have a centrifugal clutch and even some yo-yos have a clutch.

In this article, you'll learn why you need a clutch, how the clutch in your car works and find out some interesting, and perhaps surprising, places where clutches can be found.

Clutches are useful in devices that have two rotating shafts. In these devices, one of the shafts is typically driven by a motor or pulley, and the other shaft drives another device. In a drill, for instance, one shaft is driven by a motor and the other drives a drill chuck. The clutch connects the two shafts so that they can either be locked together and spin at the same speed, or be decoupled and spin at different speeds.

In a car, you need a clutch because the engine spins all the time, but the car's wheels do not. In order for­ a car to stop without killing the engine, the wheels need to be disconnected from the engine somehow. The clutch allows us to smoothly engage a spinning engine to a non-spinning transmission by controlling the slippage between them.

To understand how a clutch works, it helps to know a little bit about friction, which is a measure of how hard it is to slide one object over another. Friction is caused by the peaks and valleys that are part of every surface -- even very smooth surfaces still have microscopic peaks and valleys. The larger these peaks and valleys are, the harder it is to slide the object. You can learn more about friction in How Brakes Work.

The 6L50 transmission is a Hydra-Matic six-speed rear and all-wheel drive automatic transmission produced by GM 

Workers assembling a new transmission at the button up section.