Toyota’s CVT is more distinctive, and the quality of Honda’s CVT is relatively more stable!
Among the many Japanese brands, Honda is undoubtedly an "alternative". Unlike other car companies, Honda's car manufacturing philosophy seems to be more inclined to "independence". If you make something yourself, use others temporarily and then make it yourself. The reason for this concept is that the original Honda was born because of technology.
Honda's CVT is completely developed and produced by itself. After years of development and multiple recalls, it has gradually matured from initial instability to now. Honda is also the only company that can design and produce CVT steel belts by itself. of manufacturers. The CVT steel belts of other car companies come from Bosch or Schaeffler. In addition, in order to reduce power consumption and improve efficiency, Honda has optimized the control logic of the hydraulic torque converter and CVT cone wheel. By increasing the wide speed ratio and using precise hydraulic control technology, the transmission efficiency has been improved. Therefore, Honda's CVT pays more attention to energy saving. and efficacy, reflecting the balance of power and energy efficiency. Toyota's CVT comes from Japan's Aisin. Although Aisin is very famous in the AT field, it is still a newcomer in the CVT field.
Toyota's CVT is produced by Aisin. Aisin is very famous in the field of AT gearboxes. It was the first in the world to develop a variety of AT gearbox models. Aisin gearboxes have many names in the industry. has a halo, and the gearboxes it produces have also been loved by many car companies and consumers. Let’s briefly share with you:
In 2002, the world’s first front-wheel drive transverse 6AT gearbox
In 2006, the world's first rear-drive longitudinal 8AT gearbox
In 2012, the world's first front-wheel transverse 8AT gearbox
In 2016, the world's first rear-drive multi-stage hybrid Automatic transmission
In 2017, the world’s first rear-drive longitudinal 10AT transmission
In 2019, the world’s first direct-drive CVT (Direct Shift-CVT)
This is the focus of what I am talking about today, Direct Shift-CVT, the new continuously variable transmission, which is the feature of Toyota CVT. Let’s focus on it below:
Before Toyota’s Direct Shift-CVT came out, the world’s The principle of all CVTs is the same. The cone wheel presses the steel belt or chain, and combined with hydraulic control, the inner diameter of the cone wheel changes to achieve the purpose of changing the transmission ratio.
The biggest disadvantage of the traditional CVT is that due to the radius limitations of the cone wheel and steel belt, the transmission ratio cannot be wider, otherwise it will affect the efficiency of power transmission, especially in extreme low gears. The inner diameter of the cone wheel needs to be made smaller. An inner diameter that is too small will bring another disadvantage, that is, it requires particularly high hydraulic pressure, which in turn results in a loss of energy consumption. In addition, it cannot handle too much torque.
In order to improve these shortcomings of CVT, Toyota innovatively added a starting gear inside the traditional CVT gearbox. The gear is used for power transmission in conditions such as starting and rapid acceleration. When driving at medium and high speeds, , how to switch to cone wheel and steel belt for transmission. This design is very good and avoids the disadvantage of being unable to withstand large torque at low speed. At the same time, it can also increase the transmission ratio of the cone wheel and steel belt to reduce fuel consumption. In addition, since there is no need to consider low-speed and high-torque working conditions, the angle of the Cvt steel belt has also been increased by 6°, and the transmission ratio range has been expanded by 15%, reaching a maximum of 7.5, and cruising fuel consumption can be further reduced. Friction losses can be further reduced. To put it simply, Toyota's CVT can be called a combination of AT+CVT.
Of course, Toyota's CVT is not perfect. From a structural point of view, it increases the complexity. Since power is transmitted through two different structures, when switching between the two structures , will produce a certain amount of frustration and abnormal noise, which is also a common complaint about this CVT.
However, from a development perspective, the advent of this CVT is definitely a milestone. Through gradual optimization of the design, the stability of this CVT has become better. Many people may still have concerns about CVT. If you are skeptical, then let me tell you that the next generation of Toyota's mid-to-large hardcore off-road vehicle Pula will use this CVT gearbox in many of its relatively small-displacement models.
Toyota’s advantage lies in the overall quality control of its vehicles. No part is particularly good or top-notch, but the quality is stable. No one part wants to break. After all, no one wants to be left on the road, especially on the road. In the wild, such as Baoge and Land Cruiser, because it is Toyota, the quality of the Niutou car logo gives people confidence, so it has an abnormal value retention rate. The car is composed of tens of thousands of parts.
If there are any among these ten thousand parts If one is broken, the failure rate of the car is 100%. If the failure rate of the car is to be lower than %1, then the failure rate of these more than 10,000 parts must be less than one in a million. For 1 Only by strictly controlling the quality of more than 10,000 huge auto parts can we obtain the excellent quality of the entire vehicle. This is easier said than done. This is the great thing about Toyota. Unlike some cars that have been driven for 7.8 years, they seem to have nothing. It's a big problem. The engine hasn't been run yet, but either the water tank is repaired today or the relay is replaced tomorrow. Otherwise, the shock absorber leaks oil. Then there is a small problem with the steering gear the day after tomorrow, or there is an abnormal noise in the gearbox, the motor won't start, and the temperature rises. The engine is not working, the water temperature is too high, the five-axis shaft is rattling... and other minor problems, if you ask him, my car has never been overhauled.
The great thing about Honda is technology. The blood of Soichiro Honda flows in the bones of Honda. He is almost obsessed with technology to the point of perversion. As long as Dunxun works hard, nothing is impossible, from motorcycles to cars to Aircrafts are made one after another, and almost all of them are top-notch in the industry. Motorcycles are extremely durable. Car engines are not only as durable as Toyota, but also have low fuel consumption and high power. Toyota has a gasoline-electric hybrid and thinks it has applied for a patent. You can sit back and relax, blocking all technical barriers. As a result, Honda has also come up with it. Not only has it perfectly avoided patents, but its key overrides are also better than Toyota. Others buy CTV parts for home use, but Honda develops and produces its own chain. , almost everything you want can be done by yourself. Almost all the technologies of automobile internal combustion engines have been broken through by Honda, and there is nothing to play with. In order to continue Soichiro's dream, he built an airplane. Not only did it fly into the sky, but hundreds of them have been sold. It can be said that Honda can achieve the same quality control as Toyota, but it can also achieve power, control and driving pleasure that Toyota cannot. Therefore, in terms of single-wheel CVT or technology, Honda is even better than Toyota.< /p>