Let me say that Honda's vtec ~ This thing is transferred by Honda car ~! Not small! Vtec is first used in the car out of this Out, (as if it is a happy car, of course, the Accord car is also used, do not believe in a wide range of production to see PP, know :-))!
Later, I used it on the motorcycle ~ The first is used for CB400. CB400 This car is a green tree in Honda, so Honda will continue to work hard ~ CB400VTEC has now used the third generation! (Earth people know ~ huh)
Honda's VTEC is the opening and closing of the engine valve ~
It is mainly principle that the engine is running at low speed ~ a intake shutter is closed, reducing intake air, fuel can be efficient, stably combustful, realizing low fuel consumption, low emissions, engine high speed, two intake doors open, Increase the amount of intake, meet the needs of fuel combustion! And the control computer of the engine controls the work of the cam of the two working conditions by controlling the collected and analysis of the speed, load, engine speed, water temperature, etc., and controls the working condition of the cam to switch the opening, closing moment and lift of the valve. Change the amount of air entering the cylinder ~~ thus changing the working characteristics of the engine ~!
And VC is the technology of Lingmu on motorcycle ~! ! !
First, use the pirates of 75A,
There were also 7AA 77A and red robe (RF400), also used VC!
This VC technology can also control the switch of the valve!
When the engine is at the specified low speed (for the pirates, it is 8000 to the following) ~ just opens half, that is, 4 intake and 4 exhaust, the remaining half starts when it reaches a set high speed Work. The biggest advantage is to reduce the wear of the engine itself, improve air utilization and burning rate! I met with Vtec at this point!
Where is the biggest difference between VTEC?
The VC is equipped with two different shapes of camshafts ~~ The reason is that the engine is different from the air inhau and exhaust when the engine is high, and the valve driven by the high-speed cam is not the same. To achieve the best valve switching time, it is impossible to use a cam to be completely suitable ~ so there are two different cams to control the time of the valve switch ~! A low speed time, allowing torque to be most reasonable ~ When the engine enters a high speed, the ball is driven by the oil pressure, and then drives the other high speed cam to drive the valve. Finally, it is of course low speed and high speed, and it has the best inhalement, exhaust time, power and torque to play ~~! ! ! (Later, since Suzuki Company transferred the focus on the flyback imitation of the row ~ and the large row has had sufficient power to ensure that the tail section of the car is accelerated.
So what is the biggest role in VTEC? ?
It is a smooth work and oil supply ~! (As if the third generation of CB400VTEC has appeal to accelerate and explode! Hehe)
The main role of VC is to speed up 2 times ~!
By the way, the VC full name is the VANIABLE VALVE Control system (variable valve system)!
So in NK in 400! With the same car ~! The speed of theft is the best! And the CB with a large number of followers is the long-selling ~ Time to today ~
