If you analyze that the motorist pays attention when the machine is upgraded, then this will first turn out to be the technical characteristics of the model. But far a few know that the main indicators of manageability by car, its speed and fuel consumption parameters have a large value of the gear ratio.

Any manufacturer of cars The main principle of the gearbox device is the same - this is a certain amount of shafts on which gears with a certain amount of teeth are placed. All this complex system is designed to distribute the effort produced by the engine. Do not be in the device of this unit, move the car from the scene it would be quite difficult, but if it somehow it would be possible to implement, then you would like to give a maximum speed, I would probably have managed to leave the car from the mountain, and the minimum - climbing her .

On the other hand, overclock the car can still be adjusting the fuel supply to the engine, i.e. Using the accelerator pedal, but the acceleration time in this case will be quite long, but what seconds it will not be to go, but about the economy of the car and is suppressed.

Therefore, in the design of the car and introduced the necessary unit, called the gearbox, which continues to install on all modern models, equipping their mechanical or automatic gearbox, except for the variator, it has a slightly different work technology. Therefore, the role of the gear ratio is the topic is quite relevant.

The effect of the gear ratio on the dynamics

The gear ratio is the value calculated, it is the ratio of the number of teeth driven gear to the number of leading. The higher this value, the engine will turn the desired number of revolutions faster and turn away the car more rapidly. "Super!", "You will say, but you will be mistaken in the main thing - the maximum speed in this case will be smaller, and you will have to switch the transmissions much more often. Therefore, manufacturers adhere to the average gear ratios of gearboxes, creating multistage structures.

First, the design of the gearbox contained 3 shafts, where the 3rd transmission was direct and allowed to achieve the limit speed. The subsequent adjustment of the speed was reduced to a decrease in the engine speed through the fuel supply, in this case the speed control effect was achieved, but the auto efficiency was lost completely. Therefore, the number of gears increased, and the former direct third became the fourth or fifth, and then reached and higher feet.

The transfer numbers of the mechanical transmission gear of the most common 5-speed gearbox are located in the following ranges:

• 1st transmission - from 3 to 4;
• 2nd gear - from 2 to 2.9;
• 3rd transmission - from 1.2 to 1.9;
• 4th gear - from 0.9 to 1.2;
• 5th gear - from 0.7 to 0.9;
• rear - from 3 to 4.

In the automatic transmission, the gear ratios have a range somewhat wider so that the unit has functioned more rhythmically and smooth at different modes.

If the transmission numbers of the automatic transmission will be configured incorrectly, then it will not be possible to achieve comfort from traveling driving. But in the automatic transmission transition numbers, the unbalanced movement of the car is capable of turning into riding on a stubborn donkey, accompanied by constant jerks and unreasonably large fuel consumption.

Optimal experts consider the values \u200b\u200bclose to each other, then the car has overclocking without jerks when switching speeds. Such a crushing will not be able to implement if the gear is not enough, so the more gear - the better for your comfort when driving. This is especially true of machines with a machine gun: if there is a choice, then the automatic transmission with the 5th, 6th, 7 centuries will be much more preferable to the 4ACP. Here the automation switches for you speeds, and the more often it will do it, the faster the expensive mechanisms will fail.

Often the values \u200b\u200bof the transfer numbers indicate in the characteristics of the car. For these numbers it is a scrupulous selection by the manufacturer of optimal values. Some ideal values, as when evaluating other parameters, does not exist here. Therefore, it is impossible to call one value, and the other is good, since gearboxes affect the dynamics of the machine, and the type of driving and preferences among the car owners are often dramatically different, and it is difficult to consider the CAT separately from the entire "body" of the machine.
All high-speed modes and manufacturer's recommendations are formed only after determining the gear ratios, for they must take into account such nuances as:

• comfort in driving a car, eliminating frequent gear shift both on mechanics and on an automatic machine;
• good vehicle dynamics;
• all transmissions should work simply so that no travel mode is knocked out of the specified rhythm;
• fuel consumption must be normal and commensurate declared litters, there should be no passage;
• the long last transmission is able to dispel the car to the maximum speed;
• there must be complete compatibility of the engine and gear ratios.

The last item is explained in more detail. For each engine, the developers create a box with predetermined gear ratios, so thinking about replacing the checkpoint, the option of a non-rigorous box should not even be considered. With this modification, you can acquire a lot of problems. If a new box is taken from the same engine, but more powerful, then you are guaranteed a larger wear of the motor and not too convenient switching speeds, but it can be used to it with time, but the engine wear is an unpleasant.

No better, the situation is obtained and when replaced - the box took from a pair, where the engine was weaker. This modification you are divided by the potential of the car and increase the fuel costs of the trip.

Thus, for the full operation of the car in it there should be a native transmission. But the folk craftsmen of automobile tuning have already learned to change the transfer number in the car using new gears in the ranks and getting other characteristics of the model. Such modifications are often carried out with VAZ cars. The consequence of this is more intense throughout the car, but it has to sacrifice the maximum speed.

The gear ratio of racing cars is also highly different from serial models, because they have other operating tasks.

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