Why do some hybrid vehicles use ECVT transmissions?

The ECVT gearbox is more stable and comfortable when shifting gears, and the hybrid model is more suitable for the ECVT gearbox because of the frequent switching of fuel and electricity.

Designed according to the needs of the car, hybrid vehicles are in higher demand.

This type of gearbox will be more stable when changing gears, so this type of gearbox will be chosen.

This kind of gearbox is more stable, so some hybrid cars should be used.

This is because some hybrid vehicles are built to be very suitable for this type of transmission.

The main advantage is that the manufacturing cost is low, and the reasonable control can also save fuel.

It could be that this gearbox is able to provide better power for hybrids.

It's because this gearbox has better performance and better cost performance.

It is more stable when changing gears, and the engine torque output is a hydraulic converter or a multi-plate clutch.

In fact, ECVT and CVT gearboxes are basically the same in terms of function, both are continuously variable gear.

The working principle of the CVT gearbox is to rely on two sets of gears with a steel belt clutch to achieve functional adjustmentThrough the speed difference between the two gears to achieve the function of continuously variable speed, this way of working is very simple, but the shortcomings are also obvious, because the mainstream CVT gearbox design process is relatively long and the design is simple, so the steel belt of the gearbox in the face of many new car technology, the bearing capacity of the steel belt has become a problem.

ECVT is an automotive transmission process designed and developed by Toyota in recent years, compared with CVT, ECVT transmission is specially designed for new energy vehicles and hybrid vehiclesBecause ECVT uses a gear and two motors, one large and one small, to achieve the balance between engine power and motor power.

Therefore, the car's engine does not directly drive the vehicle, but uses these two motors to achieve power output, the large motor is responsible for the forward power of the vehicle, and the small motor is responsible for the operation of the bicycle that does not require much power, because the ECVT does not have a reverse gear. Although the ECVT is not as good as the traditional CVT gearbox in terms of power output, it has great advantages in energy saving and fuel saving.

Answer Autumn is high and cool, the mountains are red all over, in this fruitful golden autumn, I wish you wealth like autumn rain, love like autumn water, troubles drifting away with the autumn wind, career as mature as autumn fruits, and a clear mood like the autumn moon.

It's pretty much the same, but the usage is not the same.

The functions of the ECVT and the CVT are basically the same, and both belong to the continuously variable transmission. The advantage of continuously variable transmission is to make the power output of the vehicle stable, so that the owner and passengers can get a good driving experience.

The working principle of the CVT gearbox is to rely on two sets of gears with a steel belt clutch to achieve functional adjustmentThe function of continuously variable speed is achieved by the speed difference between the two gears, which is simple in the way that CVT works, but it also has obvious disadvantages.

ECVT gearbox is specially developed for new energy vehicles and hybrid models, ECVT is with the help of a gear and a large and a small two motors to achieve the balance of engine power and electric motor power, so the engine of the car will not directly drive the vehicle, but through these two motors to achieve power output. The large motor is responsible for the forward power of the vehicle, while the small motor is responsible for the operation of the bicycle that does not require too much power, and the ECVT has no reverse gear.

Later, an ECVT gearbox appeared on some new energy gasoline-electric hybrid vehicles, and many people would be puzzled: are ECVT and CVT the same gearbox, and what is the difference between them?

ECVT has an additional motor power drive system, which is the so-called dual-mode drive

The ECVT gearbox has a long life, no problem for decades, and is the most reliable transmission, because the gears are occlusive, the gearbox has no physical action at all, it is theoretically impossible to break at all, and it is simpler than a manual transmission.

The ECVT gearbox is specially developed for new energy vehicles and hybrid models, and is to achieve the balance between engine power and electric motor power with the help of a gear and two motors, one large and one small, so the engine of the car will not directly drive the vehicle, but through these two motors to achieve power output.

The details of the ECVT gearbox are as follows:

The disadvantage of the ECVT transmission is that it is less able to withstand torsional forces and is slower to respond to changes in speed. The advantage of ECVT gearbox is that it can realize the continuous change of the transmission ratio, so as to obtain the best match between the drive train and the engine working conditions, and it is characterized by good smoothness, no frustration and strong driving comfort.

The traditional regular discharge and filling of automatic transmission transmission fluid will leave more than 75% of the old transmission fluid in the cooling pipe of the hydraulic torque converter and transmission, and the new automatic transmission transmission fluid will be contaminated by the old transmission fluid in the system immediately after it is added, and the deposits that are not discharged will seriously affect the working performance of the system.

These two gearboxes are definitely the E CVT gearbox. This gearbox is the gearbox used in hybrid models, and it has this motor and this gear in this gearbox to form this gearbox. The tradition in his gearbox is still geared, and its output torque is relatively large, and it can withstand this relatively large power output.

CVT's gearbox, he is a steel belt or chain drive, he can't withstand too much torque output, and after using a large number of kilometers, this is relatively high failure rate.

From a structural point of view, ECVT and CVT have no half-dime relationship, but they both belong to the infinitely variable gear, so they are very close in the process of power transmission and driving feeling, except for smooth or smooth. At the same time, the ECVT does not have anything resembling a pulley steel belt inside, but instead has a planetary gear structure in a traditional AT gearbox, plus two electric motors to assist the engine to output power.

In terms of advantages.

CVT: 1. The structure is simple and not easy to break, and the most important parts are pulleys and steel belts, and there is really nothing that can be broken;

Smooth economy. The infinitely variable speed of the CVT transmission can achieve seamless connection between the gears and gears, so as to obtain the best match between the drivetrain and the engine operating conditions, and improve fuel economy.

ECVT: 1. There is no clutch by nature, and the engine and the two electric round machines are infinitely coupled by planetary gears, so no matter at low speed and high speed, any frustration is non-existent.

The difference is that the ECVT is an upgrade over the regular CVT, so that this gearbox can be used with the motor.

Their working principle and internal structure are completely different, and the wear resistance of CVT gearboxes of traditional fuel vehicles is not so great.

The difference between the two is still very big, but I still think that the CTV of traditional fuel vehicles is better.

The gearbox structure of E -CVT and ordinary CVT is different, they are driven in different ways, E CVT is a trillion sleepy idea through the motor drive planetary gear mechanism to transmit power, CVT is a ruler banquet through the transmission steel belt bevel gear in the gearbox to change the transmission ratio to transmit power.

Compared with the steel belt drive of ordinary CVT, although the E-CVT reduces the power loss, because its inherent stealth body cannot achieve different stove finger transmission ratios by switching different gears of the spring lift, its transmission ratio range is still relatively small and cannot withstand large instantaneous torque.

The difference between the two is that the e-CVT has lower fuel consumption and a longer battery life.

Now, more and more nouns are called"cvt", but the E-CVT has nothing to do with the CVT that we have in mind as being driven by a steel belt. Can you find fish in shredded fish? That's basically what it means.

E-CVT and CVT have nothing to do with each other, and we have to understand why CVT and E-CVT are named this way. "cvt "This is the abbreviation, and the full name of the word translates to call"Continuously variable gearbox", I won't read the English anymore.

The e-CVT is an electronic CVT, instead of a traditional steel belt CVT, it has an electric motor and an electronic control system. CVT is in its own right"Infinitely variable speed"The meaning of the meaning, and the ability to continuously change speed can be called"cvt", not referring to this structure. It's like:

We hear it a lot"at", AT actually means automatic transmission, including all automatic transmissions. When we talk to each other, we usually say:"6at、8at"That's the case.

But how exactly is it structured? You can't confuse it.

So, in layman's terms,"e-cvt "It is a very general term that can be seen as the system used by a hybrid vehicle to coordinate the engine, battery, and electric motor. For example. Toyota Camry Hybrid official ** is written on the e-CVT electronic continuously variable transmission system, Honda Accord Hybrid is also written on the e-CVT, in fact, the principle of the two is very different, the difference is very big, both are called"e-cvt"。

Let's start with Toyota's e-CVT, which uses a planetary gear set to achieve hybridization. Zheng Changshun from the School of Mechanical and Power Engineering of Shanghai Jiao Tong University published an article in the journal "Transmission Technology" "A Brief Analysis of Mainstream E-CVT Power Split Hybrid Transmission", which said. This is a description of the principle of the Toyota THS hybrid system.

The planetary gear set is connected to the engine, two motors and wheels, which can distribute the power of the engine and motor to achieve efficient driving of the vehicle.

"CVT" is a "continuously variable transmission", and the e-CVT is an electronic continuously variable transmission, which is a set of systems or systems that can be wild-fired to achieve the cooperation of engine, battery and motor.

The full name of E-CVT is Loose Electronic Control Electromagnetic Clutch Continuously Variable Transmission, and from the last few words to understand why it uses the suffix "CVT", because it can achieve continuously variable transmission, but its implementation is completely different from ordinary CVT.

There are no steel belts and tapered wheels inside the E-CVT gearbox, and there are two kinds of E-CVT before the Mechong Jianhe, one of which is the Toyota series hybrid E-CVT, which is composed of a clutch, planetary gear, and dual motors, and the other is the e-CVT of parallel hybrid, which is composed of a clutch and a dual motor.

These two are the general gearboxes of the car, their use is very extensive, the two gearboxes are the same number of functions, but the use of different cars, the envy of the brother Biling to choose their own car, according to the model to choose these two gearboxes.

It's not the same.

First, the structural difference of CVT The structure of CVT is mainly composed of two sets of pulleys (driving wheels, driven wheels) and transmission belts (steel belts), oil pumps, hydraulic torque converters, actuator hydraulic attitude calling mechanisms (valve body, oil circuit), sensors, control computer chains, etc. The composition is relatively complex, and the steel belt has limited torque, so it can generally only be used as a transmission system in small vehicles. The structure of ECVT is simple.