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Do Cartrade explain three valve CC-VTi technology, fired by twin spark plugs? We w'd love to learn if some one like you can explain both schematically as well as technically. Thanks!
By Rajesh Shah 11 November 2009

The CCVTi technology features total 3 ports, out of which 2 different intake ports called Swirl port & Power port and 1 Exhaust port. Swirl port creates swirl motion of air-fuel mixture in the combustion chamber. This Swirl motion helps in efficient combustion of lean air-fuel mixture thus giving highest fuel economy. Power Port gives high flow rate, which is a greater air-fuel mixture, which helps in delivering high power.
With Twin Spark Plug, there will be complete combustion leading to better power delivery, better mileage and very low emissions.
I guess that it also has a variable valve timing (as the name suggests) which are present in cars like new sx4, city, civic, jazz etc. Variable valve timing alters the Cam Shaft speed and the amount of opening of the valves ensuring better mileage.

Answer by Abhishek 11 November 2009

Looks like cutting and pasting information from the TVS website won't quite bring the truth out! CCVTi is an abbreviation for "combustion chamber variable timing intelligent" and is really a combination of a few different improvements and does not represent any remarkable breakthrough. The word "technology" should be used a little more respectfully, only when a new way of doing something scientific has been achieved. Automobile companies are notorious for pushing a bunch of letters as some great "technology" while the fact is that the internal combustion engine has remained fundamentally the same since it was invented.

Answer by B S Kumar 11 November 2009
Expert`s comment:

Both Abhishek and B.S.Kumar has given correct information. First one deals with theoritical advantage and second one practicality of the same.

Answer by Shiva Shankar 11 November 2009
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