At present, humans continue to innovate and compete in the field of technology. An awful lot of technology-advanced technology that currently has succeeded in creating by humans to support today's modern era. No exception on vehicle technologynowadays, mankind continues to strive to create new technologies that are more sophisticated and more efficient in order to support human needs in the present.
Notion VTEC SOHC, DOHC, VVT-i, I-DSi and EFI
This time it will be I will explain the sense and an explanation of the notion of technology, DOHC VTEC, SOHC, I-DSi, and EFI which I took from a variety of sources and then I auto summary and I combine into one in this article. Just I described one by one in the above sense.
1. VTEC TECHNOLOGY
VTEC
VTEC (Variable Valve Timing and Lift Electronic Control) is a sophisticated valve control technology invented by Honda, and until now is still in use by the Honda lineup.VTEC technology excellence lies in the ability of the small bersilinder engine produces power comparable to the great bersilinder machine, and in addition it also provides good fuel consumption, and can also be used on a daily basis.
With VTEC technology, optimum performance at high speeds, yet still be able to maintain fuel efficiency so as to lower the levels of emissions and pollution. VTEC engine settings only at the height of the valve openings are set electronically.
On a low round, a full open valve and other valve is only open a little to create the effect of rotation of the air inside the combustion chamber, so that it can achieve the optimal engine power and responsive acceleration either at the time of high or lowRPM rotation.
In principle, the VTEC is divided into three kinds: VTEC-E, VTEC SOHC, DOHC VTEC and. All three utilize rocker arm as timer valve openings. VTEC-E (Economic) first usedin Indonesia by 1996 Honda Civic Ferio. At the low, the number of valves that open only 12 of 16 valves, the rest will be open when high engine rotation.
VTEC SOHC as used first in Indonesia by the old Honda City. Long time (duration) and distance (lift) the incoming valve openings will be different when idle, round medium and high. Exhaust valve, but to not set the duration and lift. On VTEC DOHC, valves buangnya else set the duration and lift. The principle it works similar to the VTEC SOHC cam, but his separate into two.
Excellence VTEC
Small bersilinder machine, able to produce power comparable to a large bersilindermachine.
Provide good fuel consumption.
Maintain optimum engine performance to stay, either for a round of low or high round.
The process of disposal does not require variable valve opening causes smoother exhaust, so the engine will work the more lightly.
The Weakness Of The VTEC
Because it uses oil, work could be compromised because of the VTEC engine oil less, dirty or low oil pressure because of a leak in the system, for example O-ring are damaged.
2. DOHC and SOHC
DOHC and SOHC
Between the SOHC DOHC does have differences with the concept. Both of those terms to talk about the mechanism of the movement of the valve. SOHC stands for Single OverHead Camshaft DOHC, whereas is the length of the Double OverHead Camshaft.
Seen from the abbreviations of both there is one word that is the same i.e., camshaft or noken as. Indeed in the US this is located noken difference both of these technologies.
Camshhaft or u.s. noken has a function to unscrew the suction valve and the exhaust valve. Suction valve on duty to the fuel mixture sucked air into the combustion chamber. Instead, the exhaust valve has the task to transmit the rest of combustion to exhaust.
The actual mechanism of valve technology is not only a SOHC and DOHC, but there is still another system called OHV (Over Head Valve). The working mechanism of thevalve is very simple and has high durability. His camshaft placement is on the blockcylinder valve lifter and assisted the push rod between the rocker arm.
The mechanism used by many OHV diesel engine trucks that just need the torque. Because of the technology development limited, the system OHV already rarely usedagain on a gasoline engine.
Automotive experts continue to think to create a new valve mechanism system. They switched to a model OverHead Camshaft (OHC) that puts us above the noken cylinder head. Noken direct u.s. moves the rocker arm without going through the lifterand the push rod. The camshaft is driven by the crankshaft through a chain or straplugs.
This type is a bit more complicated than with OHV. Because does not use the lifter and a push rod, weighted moving parts be reduced. This makes the machine capabilities at high speeds is quite good because the valve is able to open and close with greater precision at high speeds. OHC who wears a single u.s. noken as storage of suction and exhaust valve ser
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