The invention of CVT continuously variable transmission system makes cycling a lot easier. The CVT system composed of several organizations plays an important role in the power transmission of scooter motorcycles. At the same time, many enthusiastic car owners are constantly seeking the best transmission configuration. As a user of CVT system, do you really know the set of CVT system under the cushion? Today, for scooter motorcycles, let's take you to know CVT system.
Do you understand every part of CVT?
What functions does the CVT system of scooter motorcycle have?
Continuously variable speed, automatic clutch, transmission power.
Firstly, the most admirable CVT mechanism is introduced. According to the design of Plywood and belt, different speed ratios can be automatically changed according to the increase or decrease of engine speed. By adjusting the transmission configuration, it can also be more in line with the acceleration state required by the knight. Integrating the design of automatic clutch, when the vehicle stops waiting for the red light, it does not need to operate the clutch, nor need to worry that the engine will stall. Besides, it also has the function of transmitting power, which is responsible for transmitting the power output from the engine crankshaft to the rear wheel.
What are the advantages and disadvantages of CVT system for scooter motorcycle?
Advantages: simple, comfortable, easy to use, disadvantages: low transmission efficiency.
In normal use, at least the throttle, clutch and gear rod should be operated, while the CVT system used on the scooter motorcycle can make the knight avoid shifting action and drive the vehicle easily only by operating the throttle. Besides being simple and easy to use, the vibration generated by the combination of belt and Plywood plate is relatively low and can maintain excellent comfort. 。 But the only criticism is that CVT on scooter motorcycles is simple in structure and relatively inefficient in transmission. Especially when changing speed, the friction between belt and disk will affect the efficiency of power transmission.
CVT Bridge: V-belt
In CVT system, it acts as the medium of variable speed and transmission power.
Fixed length V-belt, one end fixed between the Puli disk (front drive group), one end fixed between the open and closed discs (rear drive group), through the constant change of the belt to do speed-changing action, and the belt in addition to providing speed-changing mechanism, is also an important medium of transmission power, the engine generated power, transmission to the rear wheel and make it rotate.
The front and rear groups of transmission can be connected by V-belt.
Belt drive is simpler in cleaning and maintenance than chain drive used in gearbox, and has better shock-proof effect for transmission. Therefore, the vehicle with belt drive will feel more comfortable in riding. In terms of appearance, it can be divided into two kinds: single-tooth belt and double-tooth belt. Single-tooth belt, as its name implies, has only one side teeth. Its manufacturing process is simple and its cost is relatively low. This is common in small scooter motorcycles, and double-tooth belt on both sides of the belt are designed teeth, can effectively improve transmission efficiency and belt life, common in large scooter motorcycles or the United States.
Single teeth are the most commonly used type of belt for scooter motorcycles.
PGO TIGRA 150 uses double-tooth belt to improve transmission efficiency and durability.
The Key to Start CVT: Plywood and Plywood
The Plywood plate installed on the crankshaft end receives power from the engine. It is commonly known as the "front drive group" in conjunction with the Plywood beads. When the engine speed starts to increase, the Plywood beads will throw out because of the centrifugal force, while pushing the Plywood disk, shortening the distance between the two discs, pushing the V-belt out of the two discs, simulating the increase of the front teeth of the gearbox; conversely, when the engine speed starts to decline, the Plywood beads losing centrifugal force will gradually approach the crankshaft, and the position of the V-belt will also be close to the crankshaft. In order to simulate the state of rear gear enlargement.
Puli beads placed in the Plywood disk are important factors in the transmission mechanism.
The lines on the outer disc of Puli can introduce air and increase heat dissipation when it rotates.
Does the lighter the prize, the quicker the start?
This statement is not entirely correct. The effect of Plywood is how fast the engine speed rises. The lighter the Plywood is, the faster the engine speed rises. On the contrary, the slower the engine speed rises. The faster the speed increases, the lighter the ride will feel, but it does not mean that the vehicle will start faster. Therefore, the lighter the Plywood beads, the faster the start is not absolute. It must depend on the transmission configuration.
The effect of the weight of Plywood beads is the speed of speed rise, not the starting speed. The Secret of CVT Variable Speed: Open and close disc and big spring belong to the role of continuous variable speed in CVT system.
The front drive group consists of Plywood beads and Plywood discs, while the rear drive group consists of open and close discs, large springs and clutches. When the front drive group starts to move, the rear drive group will also start to operate by V belt, while the V belt clamped between the open and close discs will start to control the distance between the open and close discs. At this time, the big spring will start to play the role of speed change. Its softness and hardness affect the speed of the vehicle, and the speed of speed change can be compared to the speed and slowness of the shift action of the gearshift vehicle.
Drive rear group.
The V-belt is clamped between the opening and closing discs.
People say that big spring is good, really?
Wrong. We need to consider the weight of Plywood. Springs with different tonality will change the opening and closing time of the opening and closing discs, and then change the riding effect. Therefore, not only the degree of hardness and softness of the big springs, but also the matching of the weight of the Plywood beads is very important in the configuration of the transmission. Only when the best balance is reached between the two, the best power output can be achieved. This is also the case.
渝公网安备50010702505024号