Apollo Tjaarda tyres

Apollo Tjaarda tyres launched at Auto Expo

Till recently, he was known as an ace car designer. Tom Tjaarda, who has designed more than 70 cars, has found a new field of interest ? tyres. Tjaarda has reportedly designed concept tyres for the Apollo group.
Called the Apollo Aspire TT, the tyres are currently on display at the ninth Auto Expo being held in New Delhi. According to Apollo Tyres, the Aspire TT combines the inherent strengths of performance and safety. The tyre combines a bidirectional asymmetric tread pattern, created for greater grip, maneuvering and comfort.
Apollo is looking keenly at the segment of concept tyres for the development of future products. Apart from the Aspire TT, another Tjaarda-designed tyre concept is also on display. Brand-named Dolphin, it is supposedly very effective on wet surfaces, with an aggressive off-shoulder for performance on uneven surfaces. The two concepts are seen as Apollo Tyres? demonstration of its ability to deliver on the various aspects of design and technology.
The two tyre concepts are expected to hit the market later in 2008. The Apollo pavilion also showcases the company?s product range including the two successful brands such as Apollo and Regal. These apart, high-speed passenger radial and 4x4 ranges - both summer and winter tyres, commercial vehicle radials and cross-ply and OTR tyres are also on show.
Apollo has posted revenues of over $1 billion and has four manufacturing units in India. Its' overseas presence translates into two manufacturing units in South Africa and two more in Zimbabwe. In South Africa, it has over 900 dealerships, of which 190 are Dunlop Accredited Dealers.

ashley's i-bus

Ashok Leyland iBus to cost Rs 60 lakh


Ashok Leyland has launched iBus, its low-floor concept bus at the Auto Expo 2008. Priced at Rs 60 lakh, the iBus is a 1.5-metre low-floor bus, also believed to be the widest vehicle in the country. The iBus employs GPS technology that enables vehicle tracking and displays route information on an LCD screen.
The iBus also provides passenger infotainment with user-friendly message and news. Other features of the iBus include an anti-lock braking system (ABS), electronic engine management, and an elegantly designed VIP enclosure, complete with Internet access.
Experts believe that the new low floor buses currently on display could provide commuters with a safer travel option, not just in New Delhi, but everywhere in the country.
The Delhi administration is planning to float tenders for buses to help it tide over the public transportation crisis. Ashok Leyland is expected to bid for the next tender for low-floor buses from the Delhi Transport Corporation. Leyland is also expected to bid for the second and third tender of the DTC for about 3,500 buses.
The Delhi Transport Corporation plans to bring in as many as an 8,000 buses to its fleet before the 2010 Commonwealth Games. This initiative is expected to cost Rs 4000 crore for the Corporation.
Ashok Leyland is gearing up to sell as many as 100-150 iBUSes in the next fiscal.

Air cushion vehicles (ACV)

In the world of crafts Air cushion vehicles (ACV) are fast catching up. Air cushion vehicle is a craft that travels on a layer of compressed air just above any kind of surface- land, water, ice etc. Their main area of applications are in military vehicles, helicopters and where transportation using wheeled or tracked vehicles are impossible. Air cushion vehicle (ACV) is a craft that travels on a layer of compressed air just above any kind of surface – land, water, ice, sand, mud etc. The compressed air serves as an invisible cushion that eliminates almost all friction between the vehicle and the surface. Air cushion vehicles are also known as Hovercraft. They can carry both passenger and freight. Some air cushion vehicles can travel as fast as 480 km per hour.

USE OF RINGS & SIGNIFICANCE OF GAP

USE OF RINGS & SIGNIFICANCE OF GAP

Sometimes the best solutions are deceptively simple. Take, for example, sealing the combustion chamber in an internal combustion engine. Extreme temperatures mean pretty significant expansion rates when it comes to moving components within an engine and the exacting tolerances required to make that engine work properly. It gets worse when you mix metals that have different expansion rates, which is exactly what happens when you have an aluminum piston traveling inside a cast-iron cylinder bore. Leave enough tolerance between the piston and cylinder when it's hot, and it will never seal well enough to even start when it's cold. Tighten up the tolerances enough to achieve a cold start, and the engine tears itself apart from the inside out before you can even get the car on the track.

The top ring is the most important. It provides the seal that is used to create compression, hold the burning-and rapidly expanding-air/fuel mixture in the combustion chamber on the power stroke, and push the burnt remains of combustion out of the chamber to complete the process. The second ring is a bit of a backup; whatever compression slips past the first ring, the second ring helps to contain. The third ring is commonly referred to as the oil ring. It is actually two scraper rings assembled with a corrugated spacer ring between them. The oil ring's job is to scrape excess oil off the cylinder walls so that it doesn't mix with the air/fuel charge.

IN SHORT

RINGS DO NOT ALLOW THE COMPRESSED MATERIAL TO BY-PASS

AND GAP DO NOT ALLOW THE RING TO STICK..........BY RESEARCH ENGINEER JITESH

latest liner's technology

Ceramic linersCeramic Liners have better performance than metal liners in wear-proof,corrosion resistant and service life. Ceramic liners have reduced the drilling cost and improved the labour intensity in locale .So ceramic liners are the frist choice of upgrade high-voltage mud pump liners.The material of ceramic liner is the most advanced international increased flexible zirconium.The fracture toughness is K 10～15MPa (10 times valve of traditional ceramic),bending strengh is σ 600～800Mpa,Weber coefficient is m18.The specification size is （Φ150～180×310～440mm）.

LATEST PISTON TECHNOLOGY

In an effort to reduce CO2 emissions and improve fuel economy, engineers at Federal-Mogul have come up with an innovative aluminium piston design that can withstand the severe mechanical and thermal loads produced by heavily boosted diesel engines, all of which allows for significant improvements in engine performance and durability. Called DuraBowl, Federal-Mogul’s design strengthens the crown of a diesel engine piston by locally re-melting the alloy around the bowl, thus improving the fatigue strength of the aluminium where it is most needed. The result is an extension of component life to between four and seven times to that achieved with a conventional cast piston.

Federal-Mogul’s solution is to pre-machine the cast piston and then re-melt the alloy around the rim of the bowl. The re-melted alloy cools a thousand times faster than it did when originally cast, which leads to much smaller silicon particles. “The strength and efficiency of our solution is that the process is physically simple,” continues Doernenburg. “The sophistication is in the control of key parameters, which ensure consistent quality. The result is a technically advanced, high-performing and very cost-competitive product when compared with both fibre-reinforced and steel pistons.”

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