Look carefully at all the symbols on the car, the engine and in the accompanying documents. Automatic transmission is often denoted by the letters A or at. The CVT is always indicated by a combination of characters CVT.
Gather as much information about the car. Sources of information can be a variety of automotive publications, catalogs, Internet, technical and reference literature. This way you will know exactly the type of transmission, which could be installed on a particular brand of car.
Do a test drive on the car. The main difference of the variator from the machine is that a gear in the machine gives the characteristic perceptible tremors with a simultaneous change of the number of revolutions, which can be defined as the tach and by ear.
Note that modern variable-speed drives with fixed ranges with the measured drive fairly accurately replicate the operation of the machine. Therefore, the lack of aftershocks can be determined only by dynamic acceleration. Engine with a CVT with a sharp pressing the gas pedal "hangs" at a certain number of turns, and the car accelerates without bumps and when stationary the needle of the tachometer.
During the trip, find a stretch of road with driving uphill. Will slow down the car and release the brake pedal. The machine will not fall back, and start slow movement forward, the CVT on the contrary - slightly set back, and movement at idle will not. This method of determining suitable only for those CVTs that have no stop mode when rolling.
Ignore the recommendations, advice to distinguish between automatic and CVT for signs of modes of their work. It's too unreliable option, very different depending on the brand and model of the car. In addition, the designation of the modes on the machines and CVTs may be the same.
If you are still in doubt about the type of transmission installed, the final answer will receive the branded service stations. Experienced professionals will first look at the bottom of the car to say CVT or automatic.
Advice 2: How to determine speed by tachometer
Tachometer is a device intended to measure the speed of rotation of the wheel or shaft. The simplest example of such a device is a revolution counter, which in the presence of a stopwatch to measure the average rotation speed.
Modern vehicles have more sophisticated models of tachometers – digital and analog, showing the instantaneous speed of rotation. All rate information is displayed on the electronic LCD display. Their principle of operation is based on registration of the number of pulses coming from the sensors, the sequence of their receipt and pauses between pulses.
In the digital tachometer includes the Central processor, the sensor temperature of the liquid, the chip reset of the processor, ADC, 8 digits, LCD panel and the optocoupler diagnostics of the valve of idling. Tachometers of this type are usually made in the form of electronic display, which displays all the information – the number of revolutions of the engine and the shaft.
So, to read the rpm with a laser digital phototachometer on the rotation object is glued to a special reflective label included in the kit. In operation the laser beam is reflected from the marker, and the signal is read with a sensor device. Digital tachometer is indispensable in the adjustment of electronic blocks of ignition of engines mounted on vehicles.
Analog automotive tachometers more convenient. The readings reflect moving the dial hand. It consists of a magnetic coil, a chip, a graduated scale, arrow and wire. The analog tachometer is a device in which the signal from the shaft is transferred via wires to the chip, and that, in turn, leads to the movement of the arrow on the graduated scale.
The testimony of the tachometer transformirovalsya, as a rule, in certain values – hours, minutes, seconds, meters, etc. the Most accurate electronic enable measurement of up to 100 rpm According to the method of installation of tachometers are divided into regular and remote. So, if regular devices are mounted directly into the dashboard, remote control, installed on a special stalk on the torpedo panel. In some newer models of cars use tachometers which applied a stroboscopic effect is achieved by using a bright flash lamp.
Advice 3: How to adjust the variator
Proper tuning of variator allows to slightly improve the dynamic performance of the scooter or the smoothness of the drive. For tuning the scooter settings will help smooth out the appeared shortcomings of forced engine. For example, such as failures at low and medium rpm. The basic idea of the setting of the variator – weights selection in mass and size.
You will need
- tool for removing and disassembling the variator;
- - puller variator;
- - new weights-videos
Before configuring the powertrain of the scooter make sure the engine is fully serviceable and correctly adjusted. Disassemble the CVT. This is in itself a difficult task, if you never did. To efficiently analyze the transmission of the scooter and not break the splines of the crankshaft, get a special puller variator. Find weights-rollers inside of a moving part of the pulley. Assess their condition and wear.
If your scooter is not manufactured in Europe, and the Chinese or intended for the domestic market of Japan, be sure to perform the measurements and weigh-in all weights. The owners of European models and Japanese, intended for export, the data on the size and mass of the rollers can be taken from the instruction manual or booklets of tuning companies.
Visit the parts shop for a scooter or tuning shop. According to the booklet any good tuning company pick up their new weights-rollers. Note that the rollers should match the native, and the mass is 0.5-1.5 grams less than regular. The ideal option would be the purchase of three sets of weights: for half a gram, gram and a half grams lighter. This will allow more fine-tune the CVT for your weight and engine.
Be sure to consult with the seller if tuning your rollers the size was not in the booklet. Entirely on his opinion is not necessary to rely, as store employees, too, are not always competent. Therefore it is suggested you samples definitely obmerte and weigh yourself.
Installing new rollers on your variator, you will receive a small but noticeable improvement in dynamics. If you have prudently acquired a few aftermarket sets of rollers, and experiment with the drive on each set. But in any case, do not use too light weights – they will not allow the motor to reach maximum rpm that will adversely affect the maximum speed.
If goal setting CVT – aliasing failures forced engine at low revs, the weights get not easier, but harder standard. If you put heavier loads on the motor with a standard motor, the dynamic is noticeably worse, but the gain in smoothness of acceleration, especially with a heavy load.
Advice 4: Automatic or CVT: experts
All motorists know that in a manual transmission – five speed, automatic box – about eight and a CVT has an infinite number of gears. So what is better to choose an automatic or CVT, and what their functions should be guided by the choice?
The advantages of CVT
A variator is a device between the engine and the wheels, which allows for maximum smoothness to change the rotation speed of the master and slave drives. Traditionally, variable-speed drives are used in mopeds, scooters, snow and water scooters, however, it has recently been implemented in modern cars. Unlike automatic, the CVT moves much smoother accelerating as a powerful motor – in the set speed there are no failures and loud noises.
A vehicle with a CVT accelerates more rapidly the more powerful machines by saving time on the gear shift.
Compared to the automatic transmission, according to the set rpm the CVT is the clear leader. In addition, a car with a CVT does not stall at traffic lights and not roll back at uphill, and starting off is always very smooth, regardless of the skill of the driver. Some motorists don't like smooth and constant hum of the motor caused by the variator, and the absence of beloved by many men "sporty growl" under hard acceleration of the vehicle. This is because the variator in a timely manner optimizes the operation of the motor, not allowing it to reach critical values.
What to choose?
Some car owners prefer the CVT because it is more silent compared to the automatic transmission, fuel economy, rapidly accelerates the engine and other drive components are more optimized load. In addition, the CVT, unlike a machine, working in a sparing mode, which provides e-governance. The result is a car much less maintenance and almost never needs repair variator.
The CVT also has a positive effect on the environment the level of harmful substances in its exhaust gases is much lower than in gases machine.
Fans of the classic gearboxes can buy a variator with Tiptronic emulator switch speed settings. Lovers of speed and power will appreciate the CVT with a "kick-down", through which the sharp pressing the gas pedal to the max instantly changes the gear ratio and the car is accelerating at lightning speed, literally. Thus, the CVT has more advantages compared to automatic transmission.