[poheric]

Hi all,
anybody know what is different between Dohc & Sohc engine, which 1 is more
advance? why Vios use Dohc but city use Sohc? which 1 better

[houseater]

well, both system got it own advantage n disadvantage lo..
sohc engine is simpler thus less mechanical movement result better
reliability. mercedes benz love sohc...
dohc engine is more efficient n better performance since 2 cam shaft is
used to control intake or out-goin valves...

[poheric]

thanks, houseater

[ring]

SOHC = Better FC = Lower end torque = Feel less power

DOHC = FC high = Higher torque = More power

One of the most advance engine come with something "...TI, VVTI,VTEC or
CVT". Even if you ve DOHC but with caburator engine it is not high tech
yet.

[Itchibawa]

Unless I'm mistaken, CVT that I know, don't have anything to do with
engine head/camshaft.

It stands for Continuous Variable Transmission. It eliminates the
jerkiness when an automatic gearbox change gears.

[cax]

Consider this fact:

Honda Accord 2.0i (RM 140,000) -> i-VTECH, DOHC, 16V (4 cylinders)
Honda Accord 2.4i (RM 140,000) -> i-VTECH, DOHC, 16V (4 cylinders)
Honda Accord 3.0i (RM 200,000) -> VTECH, SOHC, 24V (V6)

Laymen only talk of "power". Automotive engineers talk of horsepower,
torque, power-to-weight ratio, drag co-efficient etc etc. There must be a
trade-off between these factors in designing a car.

[kevin62]

CVT also use in NISSAN. Called continuous variable valve timing.

[cax]

CVT, VVT-i, i-VTECH and so on...

The Renault engine in Waja 1.8i also got a variable valve timer
technology. somehow the european makes don't use fanciful terms like
their japanese rivals.

[PotenzaG3]

yes... european makes also uses these terms, BMW is using M-power,

CVT is gearbox type, not engine.

[Itchibawa]

Valvetronic and Double-VANOS, BMW speak.