Automobile terminologies

VTEC basically stands for variable valve timing & lift electronic control. it is basically controlled by an ECU which adjusts the valve timings for good efficiency at low RPM & good power output at higher RPM. in normal engines, the valve timings are fixed irrespective of the RPM. this was invented by honda.

i-VTEC is an evolution of the VTEC system, again invented by honda. it stands for intelligent-VTEC.

for further details, go through this article:
http://asia.vtec.net/article/ivtec/

@ CC: VVT-i is toyota's version of this tech, not honda's.

raj_5004 wrote:
@ CC: VVT-i i toyota's version of this tech, not honda's.

What is meant is VTEC is Honda's name for VVT-i, that is both are similar. Small changes and different names are the difference.

similar thing exists in suzuki cars too
DDIS-direct diesel injection system

@ CC: ohh, sorry bro.

@ napster: i feel DDIS is totally different. it has more to do with the injection of diesel in the combustion chamber & nothing to do with the timing of the valves.

napster wrote:similar thing exists in suzuki cars too
DDIS-direct diesel injection system

but Raj this is what maruti says it to their DDiS engine given in swifts and ritz now.Which they have named it for multijet as we all know.

DDIS is just CRDi. It is about the injection and got nothing to do with timing of the valves.

But one thing, do diesel cars have valves like petrol cars? I should be really ignorant for not knowing this :stupid:


EDIT: @vijay, that's right. DDIS is found in Ritz and Swift diesel. But it is about injection of diesel and it has got nothing to do with valve timing like VTEC,etc..

ok good differentition on ivtec, vvti and ddis
now what is LUGGING?- lugging power, lugging ability and all.

Lugging usually occurs when you drive at low rpms.
Like you are cruising at 60 in 4th gear and brake to 20 and still in 4th gear, it will lead to some kind of a noise from the engine bay.

When in gear, if you accelerate and the car is unable to accelerate - that is lugging.

If you hear gurgling, grinding or other noises that reduce when the RPMS increase - thats lugging.

so "lugging is injurious to your vehicle's health" and may also result in bad FE- i hope.

It sure is.
Causes usage of excess fuel and damage to the engine.

@ vijay: as CC said, its basically the CRDi tech & has nothing to do with valves. maruti calls it DDiS, tata call its quadrajet, hyundai - CRDi, mahindra - CRDe, fiat - multijet. the tech is the same with different names due to copyright issues.

@ fihast: lugging capability is more in diesels than petrols. since dieseld have more torque comparitively, they are able to pull the load in lower gear as compared to a petrol engine of nearly same size.

good info raj. so here goes the next discussion,
hatchback/liftback, saloon, sedan-notchback fastback sporthatch, estate,coupe,station wagon,limousine and more if any
also add images/examples from indian roads

hatchback: a car which has an opening tailgate eg. maruti800, zen, santro, wagon R etc.


saloon aka sedan: three box, four door cars. eg. honda city, ford ikon. hyundai accent etc.


notchback: is similar to a saloon. with a short boot. eg. desire


semi notchback: some cars have short boots like notchback but their tailgate opens like a hatchback. eg. accent viva, skoda octavia etc.


fastback: a car which has a sloping roofline at the rear. a sedan, hatchback or coupe can be a fastback. eg. Mustang eleanor gt500


estate aka station wagon: a mix of a saloon with a hatchback. by extending the roofline and making the car a hatchback thereby creating more luggage space. eg. opel corsa swing, baleno altura, tata indigo marina, skoda octavia combi etc.


coupe: a two door car and has rakish roof similar to fastbacks. eg. audi TT, bmw M3 etc


limousine: a car with a extra long wheelbase.


spyder: an open top sports car. eg. porsche boxster


please add more whatever i have missed out. also please point out if i have made any mistakes.

good job dimri
also add ( i read somewhere)
coupe has interior space<33 cubic ft
sedan has interior space=/> 33 cubic ft

fihast wrote:good job dimri
also add ( i read somewhere)
coupe has interior space<33 cubic ft
sedan has interior space=/> 33 cubic ft

thanks. well i didnt know bout that.

cabrio coach- semi convertible
cabriolet - convertible
crossover
hearse
SUV- sports utility vehicle
MUV-multi utility vahicle
MAV-multi activity vehicle
MPV-multi purpose vehicle
LAV-leisure activity vehicle
delivery sedans

Crossover Utility Vehicle(CUV) is a vehicle with car platform but shares features of SUV like all wheel drive, high ground clearance etc.
eg:-mitsubishi outlander. right?

@ fihast:
crossover - Honda CRV too.
SUV - scorpio, safari, pajero
MUV - innova

I won't call the CR-V a cross over.
Its more towards the SUV side.

abhinavgupta wrote:I won't call the CR-V a cross over.
Its more towards the SUV side.

but it seems the honda CR-V is on honda civic's platform, hence a crossover.

abhinavgupta wrote:I won't call the CR-V a cross over.
Its more towards the SUV side.

honda CRV cannot be a SUV. it has no 4WD, it chassis is from the civic & GC is low.

raj_5004 wrote:

abhinavgupta wrote:I won't call the CR-V a cross over.
Its more towards the SUV side.

honda CRV cannot be a SUV. it has no 4WD, it chassis is from the civic & GC is low.

I guess CRV has 4WD. But IMO, its not a SUV. A crossover, just like Outlander.

@ CC: sorry buddy, my bad. mu neighbour has a 2.0 CRV, it does not have 4WD. the 2.4 does have.

It is not based on the civic in any sense.
It has better dynamics than the civic.

But the fact is CRV is based on Civic.