Even in the later hybrid system, the patent of planetary power shunt was held by Toyota. Honda suddenly developed IMMD hybrid power system, replacing the planetary gear power split system with clutch. Finally, it was even with Toyota, and even Toyota admitted that Honda's hybrid system had lower fuel consumption.
The same is true for CVT gearboxes. In fact, Honda originally used Gatco CVT gearbox (for Fit), so it naturally took a while to make CVT gearbox. It is not difficult for Honda to make CVT gearbox, and Honda is good at innovation. 1995 Six-generation Civic matched its own CVT gearbox. The highlight is that Honda Civic had the largest engine displacement among the cars using CVT at that time. This is Honda. It likes to be extreme. 20 13 domestic nine-generation accord is equipped with CVT gearbox. The steel belt used for Honda CVT gearbox is self-produced. Of course, the steel belt is authorized by Bosch Technology. After Honda is authorized, its own production can be more exquisite. Compared with other brands of cars, Honda pays more attention to performance, so even the CVT gearbox adjustment is obviously different from Nissan. For the same CVT model, Honda releases when it steps on the accelerator, and the car will rush forward when it stops. What about Nissan? When you step on the accelerator, you release it immediately. It feels like a neutral throttle, and the gearbox is dull and unresponsive.
At present, the most widely used gearbox in Honda is CVT gearbox, which has achieved various sizes. CVT gearboxes are used in Fit/Civic/Odyssey/Accord/Crown Road and other models. This is not because Honda CVT has anything extraordinary, but because Honda currently has no more suitable gearbox to use. The technology of balanced shaft gearbox is old and heavy, so it can't be used. The 8DC gearbox is very expensive. ZF 9AT gearbox costs a lot, and few models need to be purchased. 10AT gearbox is too expensive to match the high-power engine.
In this way, Honda can only continue to dig deep into cvt.
"gearbox, quality problems are not allowed, the main reliability. At present, there are frequent problems with 1.5T engine. There is something wrong with the gearbox, Honda may not cry! Toyota, on the other hand, is more calm than Honda in power layout. Its Aisin gearbox can provide excellent AT gearbox, and never have to worry about gearbox problems. In some small cars/compact cars, using AT gearbox is obviously not conducive to fuel consumption, and using CVT gearbox is a good choice. There is no pressure on the Toyota gearbox, so there are more ways to play on the CVT gearbox, such as the S-CVT gearbox used by Corolla/Ralink.
On the surface, it seems that only a few gears are simulated. In fact, the internal oil pump has been optimized and replaced by a dual-displacement oil pump. The displacement of oil pump is different under high and low speed and high and low load, and can be automatically switched. This also reduces the energy consumption of the oil pump by 30%. Even so, Toyota engineers are not satisfied. They have developed a gear-driven cvt gearbox.
It can be said that the CVT gearbox was broken by Toyota.
The structure of CVT gearbox leads to the phenomenon of power lag when the gearbox starts. There is still a difference between pulley transmission and gear transmission. Gear transmission is more direct and power is not delayed. When the pulley starts, it will always be a beat slower, and the engine power will be suppressed, which is also to protect the CVT chain (steel belt). Therefore, CVT gearbox is not as good as AT/DCT gearbox. After solving the problem of food and clothing, Toyota began to consider more problems (desires), so it improved the starting problem of CVT gearbox, adding two starting gears, which are equivalent to 1 and 2 gears of AT gearbox. After the starting task is completed, the 3rd, 4th, 5th, 6th and 7th gears are handed over to CVT transmission mechanism. In this way, the combination of AT and cvt becomes: gear direct drive CVT gearbox.
With the addition of gears, the start becomes smoother and hearty! And the transmission ratio of the gearbox has also increased.
Compared with the previous generation CVT gearbox, the transmission ratio is extended from 6.5 to 7.5. The wider transmission ratio improves the economy, the starting power is stronger and the fuel consumption is lower. Honda's CVT is a rice bowl, carefully afraid of breaking it. Toyota's CVT is playing with tickets, playing cool, showing off and high-profile, so it was first adopted in Yize /CHR.
Honda's cvt gearbox has clutch plates, but no gears.
Cvt gearboxes used in some Toyota models, such as Camry 2.0l, are geared at starting and low speed, so as to minimize the slippage and wear of steel belts.
In fact, Nissan also has this technology, and it can also manufacture cvt gearboxes with gears inside. However, due to the slightly higher cost, Nissan has few practical applications.
Since its listing, cvt has been full of controversy. Those who praise it think it is the best gearbox in the world, and those who don't like it dare not avoid it. Most of the three major Japanese car companies: Toyota, Nissan and Honda's automatic transmission models use cvt gearboxes, and they are basically steel belts. The steel belt slips, which means that the gearbox is completely scrapped! Moreover, the cvt gearbox has a fault, and it is generally only replaced without repair, that is, the assembly is replaced.
Although the manufacturing cost of cvt gearbox is extremely cheap, the price of cvt assembly is not cheap. For example, if Toyota Camaro changes the price of steel belt assembly, 4s will quote 60,000 yuan! Don't think it's a fantasy. Just a few days ago, a car owner in Xi 'an paid 55,000 yuan for it.
So Honda bought the engine to deliver the car, and Corolla bought the gearbox to deliver the car!
CVT Chinese name stepless speed change
At the same time, it is driven by steel belt to realize seamless power connection without gears. But in one case, it complains that it slips, once it slips, it loses power and cannot bear too much torque output. It is only suitable for slow-moving cars in family cars. Once it is opened violently, it will overheat due to slipping and cut off the power output!
It is this feature that makes it always one step behind others. Toyota has made a CVT gearbox with first and second gears. Suitable for the latest models! Honda doesn't have this design!
You said that only Toyota started temporarily, Nissan shifted gears at high speed to get a higher gear ratio range, and Honda has no gear structure for the time being.
Honda doesn't, Toyota has a starting gear, and Nissan uses 2AT+CVT on small displacement vehicles.
The best CVT technology is Nissan Gatco, and it is also the only OEM that applies CVT to 3.5L displacement models. Adding the starting AT structure to CVT is the first initiative of Nissan, which was applied to Nissan Sunshine as early as 20 10, and the model is CVT 7,2at+CVT structure. Although Nissan occasionally has cvt problems, the probability is very low, because Nissan uses CVT except for a few large-displacement models, so it is normal to have a high probability of quality problems. Toyota's previous low-end cars, such as the 20 14 Vios Corolla, used the old 4AT, while other models, such as the Camry, used 6AT. Toyota's large-scale adoption of cvt has only been rolled out in recent years. Honda used to use its own parallel axis 5at, and the first generation Fit used Nissan Gateco cvt, which has never seen a large-scale Volkswagen. Cvt is the main project that Nissan GATT can focus on, so it focuses more on R&D than these two fields. The slogan of technology Nissan is not without confidence. As early as ten years ago, Nissan had mass-produced 7at.
The cvt gearbox of Honda Civic should be shifted to low gear! How else to save so many cars! Nissan Sylphy's gearbox is stuck in the throttle, and the response is at least three seconds slow. I think the steel belt inside slipped.
This is a technical problem. CVT gearbox is the most used gearbox for Japanese cars. It is mainly used because of its ultra-low cost, simple structure, small experience and light weight. For Japanese car companies, it is absolutely tailor-made and plays a very important role in the performance of car fuel consumption. Honda is no exception, and low-profile models all use CVT gearboxes. It has no starting device. The CVT with starting gear is Toyota's CVT gearbox.
CVT gearbox has both advantages and obvious disadvantages. First, the torque is small. Although its maximum bearing torque has been obviously improved now, it is actually a shortcoming and cannot be fundamentally changed. Toyota used a technical mobile phone to change it, that is, adding a second gear at AT, that is, starting the gear. When starting, the friction of steel belt is not needed, and the torque that the gear can bear is much larger. At the same time, it can further improve the high-speed driving of CVT and achieve the purpose of high-speed fuel saving. Honda does not have such a gearbox yet. However, it also made the CVT shift.
Honda's gearbox G-Design Shift CVT and G-Design Shift control technology combine wide transmission ratio, precise hydraulic control technology and brand-new high-strength transmission belt &; CVT transmission fluid.
Honda responded better to the start of its own CVT and the acceleration was more linear. Moreover, in terms of high g, there are more continuations.
There is no starting gear, it is best not to touch Honda cvt, which has thermal attenuation. The starting gear is only available in Toyota 10 cvt.
My 20 1 1 Corolla 1.8cvt has a starting gear.