Basic behind tyre re-grooving

1. Tyre Inspection
2. Tyre Buffering
3. Tyre Builder
4. Pressure chamber
5. Mono rail
6. Envelope spider

Egyptian reliefs from 1500BC depict siphons used to extract liquids from large storage jars.There is physical evidence for the use of siphons by Greek engineers in the 3rd century BC at Pergamon.
Hero of Alexandria wrote extensively about siphons in the treatise Pneumatica.In the 9th century,the Banu Musa brothers invented a double-concentric siphons,which they described in their Book of Ingenious Devices.
Siphons were studied further in the 17th century,in the context of suction pumps

The i-Vtech technology is a part or further Invansion of VTEC Technology.

Before seeing i-vtec first let us see what is VTEC is ?

Now first Let us see What is actually VTEC Technolgy.

VTEC stands for (Variable Valve Timing Engine Control) is Valvetrain system developed by Honda to (Improve the Volumetric Efficency) of four Stroke Engine.

JTD ENGINE / MULTI-JET ENGINE / QUADRA-JET ENGINE

JTD ENGINE

JTD stands for (unijet Turbo Diesel). This is Fiat Group's Current Terms for (Common nail Turbo diesel Engine). The unijet Involves Two Injection In one combustion process.

The common rail system prototype was developed in the 1960's by Robert Huber of Switzerland and the technology further  developed by Dr.Marco Ganser at the swiss Federal Institute of Technology in Zurich.
               The first successfull usage in production vehicle began in Japan by the mid-1990's. Dr.Shohei Itoh & Masahina Miyaki of the Denso Corporation.

" Note: CRDI are governed by an Engine Control Unit(E.C.U) which opens
each injector electronically rather than mechanically."

DO YOU KNOW WHAT IS MAIN PART OF AN AUTOMOBILE ???

Yes, you are right it is CHASSIS ! They are referred to as skeleton of an Automobile.A large number of designs in pressed-steel frame a skeleton on which an engine,axle assemblies,transmission,steering mechanism,brakes and suspension members are mounted.

BASIC FUNCTION OF CHASSIS ARE
1.it absorbs the reaction from the movement of an engine and axle.
2.blances the reaction forces of the wheel in acceleration and braking.
3.Absorb aerodynamics wind forces and road shocks through the suspension.
4.Absorb the major"Energy of Impact"in the event of an accident.

LET  US SEE ASSEMBLING OF PETROL CAR ENGINE

1.The first thing you saw was CYLINDER BLOCK OR BODY
2.The sccond thing was assembling of CRANKSHAFT on which PISTON is mounted and it also turn reciprocatory  motion of piston into rotatory and fitting of FLY-WHEEL.
3. Then you saw how PISTON is joined to CONNECTING ROD via GUDGEON PIN and fitted to block.
4.Then you saw the mounting of CYLINDER HEAD and MOUNTING OF CAMSHAFT and fitting of INLET and OUTLET VALVE 
5. Then you saw the joining of CRANK AND CAM via chain to ADJUST of inlet and outlet time and covering of it by TABET COVER and covering of CYLINDER HEAD.
6.Then you saw the fitting of OIL SUMP or bed from bottom of engine.
7. Then you saw application of alternator and its wiring.
8.Then you saw the assembling of INLET MANIFOLD,CHOKE WIRE,SPARKPLUG.SUPERCHARGERS and they are joined by timing belt ASSEMBLING of alternator and dynamo.
9.Then you saw assembling of EXHAUST MANIFOLD  and covering of it !!
10.Then you saw the running of engine the inlet stroke the explosion and exhaust and working of cam !!

 Do you know How to read your tyre  ??

 DIESEL ENGINE VS PETROL ENGINE
                                           
On basis of working
Inlet stroke
 In petrol engines the mixture of air and petrol is drawn in by the falling piston
 In diesel engines only air is drawn in by the falling piston

Compression stroke
 In petrol engine, the mixture is compressed upto about 1/7th to 1/11th of its original size.
 In diesel engine, only air is compressed upto about 1/15th to 1/26th of its original size.

History 

Nikolaus August Otto as a young man was a traveling salesman for a grocery concern. In his travels he encountered the internal combustion engine built in Paris by Belgian expatriate Jean Joseph Etienne Lenoir. In 1860 Lenoir succeeded in creating a double acting engine which ran on illuminating gas at 4% efficiency. The 18 liter Lenoir Engine was able to produce only 2 horsepower. The Lenoir engine ran on the illuminating gas that was made from coal which had been developed in Paris by Philip Lebon.

HISTORY 

The first commercial two-stroke engine involving in-cylinder compression is attributed to Scottish engineer Dugald Clerk, who in 1881 patented his design, his engine having a separate charging cylinder. The crankcase-scavenged engine, employing the area below the piston as a charging pump, is generally credited to Englishman Joseph Day.

See guys this generally happen in winters. In winters the temperature is low outside as-well-as inside the engine and it is not an optimum condition for combustion.So when we kick them we give initially force to the fly-wheel to perform first stroke so that combustion take place and we can get power stroke and then process get spontaneous! But due to low temperature the first combustion does not took place and the energy stored in fly-wheel(which is provided by us on kicking) is return back to us (by newton 3rd law of motion) and we get that back force or we say BACK.( BUT THIS PROCESS TOOK PLACE VERY QUICKLY

Thinking putty (silly putty) is a silicone polymer.It has unique properties:It is viscoelastic i.e it can be stretched & shaped & mashed back together again; & as its apparent viscosity increase directly with respect to the amount of  force applied.Silly putty in non-newtonian visco-elastic polymer;better characterized as a dilant fluid.
  BY adding a ferrous component  to an silly putty we can keep all characteristics of the original putty,but now have the additional dimension of MAGNETISM ! & we called it MAGNETIC PUTTY !!

 

What is ABS ?