Which CVT gearbox is more advanced, Toyota or Nissan?

Toyota Toyota Holdings Aisin AW and Nissan Holdings Gateke Jatco should be more advanced in the research and development and promotion of CVT gearbox technology. Domestic Toyota S-CVT gearbox is provided by Toyota Changshu Parts Co., Ltd., and domestic Nissan CVT gearbox is provided by Gatco Guangzhou Automatic Transmission Co., Ltd. According to the actual feedback, Dongfeng Nissan CVT gearbox has high failure rate and insufficient stability and durability. However, there are many types of CVT gearboxes from the two manufacturers, and the matching models are different, so we should discuss them separately from the technical level. 1, about Gateke Jatco and aisin AW

Gateco Co., Ltd., founded in 1943, is one of the three largest automatic transmission manufacturers in the world. By 1997, continuously variable CVT gearboxes are produced, with a cumulative output of more than 40 million units, accounting for 37% of the global total, and it is in a leading position in the CVT gearbox industry. Nissan, Mitsubishi and Suzuki are major shareholders of Jatco. Gateco Guangzhou Automatic Transmission Co., Ltd. was established in 2007 and put into production in 2009.

Aisin Seiki Co., Ltd., founded in 1969, is a world-famous R&D professional automobile automatic transmission manufacturer. Its transmission core subsidiary Aisin AW products (AT transmission) has the world's largest market share. AI of Aisin Seiki Co., Ltd. and AW of Aisin Co., Ltd. are expected to merge in April 20021year. Aisin AW will buy back all AW shares held by Toyota Motor Corporation, and then merge with Aisin Seiki AI. Domestic Toyota Changshu Parts Co., Ltd. was established on 20 12, and officially put into production on 20 14.

2. Guangzhou Gatco Automatic Transmission Co., Ltd..

Gateke Guangzhou Factory is Gateke's first production base in China, and the second production base in Zhangjiagang is under construction. The mass production history of the main gearbox products in Gatco Guangzhou factory is: Jatco CVT7 was officially mass-produced in April of 20 1 1 year, Jatco CVT8 was officially mass-produced in April of 201year, and Jatco CVT7 W/R gearbox was first mass-produced in the world in August of 201year. Jatco CVT7 is the first product with auxiliary transmission mechanism in the world. Jatco CVT7 W/R adopts brand-new steel belt and pulley, reaching the world's largest transmission ratio range of 8.7, which can be locked when starting. Jatco CVT8 can still reach the transmission ratio of 7.0 without auxiliary transmission mechanism, and its torque capacity can cover 2.0L to 3.5L engines.

3. Toyota Changshu Parts Co., Ltd..

Toyota Changshu Parts Co., Ltd. is Toyota's first overseas CVT production plant, which mainly produces continuously variable transmissions and hybrid drive axles. The new generation S-CVT has been specially developed and adjusted for the needs of consumers in China and the road environment in China. By adopting the world's first coaxial double-outlet oil pump, a new flexible locking system, a new gearbox oil, a new speed change control system, and motion cycle shifting and other measures. The steel belt and valve body inside the new generation S-CVT gearbox in China are imported, and the gear and shell are made in China.

4. Several key points of 4.CVT gearbox?

(1) Maximum transmission ratio range. Gatcvt7W/R has the largest transmission ratio range of 8.7 in the world; Toyota is the world's first gear-driven CVT direct shift-the maximum transmission ratio of CVT is 7.5.

(2) Torque of transmission bearing. Gatco CVT8 normal version can carry 250Nm, and the enhanced version can carry 380Nm；; Toyota K 120 direct shift -CVT can carry 2 15 Nm. Gatco CVT8 can match 2.0T and 2.0L-3.5L displacement engines, while Toyota CVT currently only matches 1.2T and 2.0L displacement engines.

(3) Toyota direct shift -CVT gearbox is known as the world's first gear-driven CVT. The gear mechanism is responsible for the low-speed area, and the steel belt is responsible for the middle and high-speed area. Gateke's auxiliary transmission mechanism planetary gear technology has a history of 10 years.

5. Use of domestic Nissan and Toyota CVT gearboxes

(1) Nissan 1.6L adopts CVT7 W/R, 2.0L and 2.5L models adopt CVT8 normal version, and 2.0T models adopt CVT8 enhanced version. There are many factors in Guangzhou Gateke CVT gearbox, such as poor quality of steel belt, unreasonable design of solenoid valve, poor filtering effect of filter screen, substandard assembly process and so on. At present, Dongfeng Nissan provides a 5-year/65,438+0,500 km vehicle warranty, but it is an objective fact that the failure rate of Dongfeng Nissan CVT gearbox is high.

(2) Toyota 1.2T model adopts S-CVT analog 10 speed gearbox, and 2.0L model adopts direct shift -CVT analog 10 speed CVT gearbox. Toyota direct shift -CVT(K 120) gearbox is optimized and upgraded on the basis of the original Toyota Conculture CVT (k114) gearbox. In 20 18, Toyota IZOA Tomzawa and Toyota C-HR models were recalled due to gearbox defects only half a year after they were launched, and qualified torque converter and CVT assemblies were replaced.

Summary: Nissan's Gatco CVT gearbox is more advanced in overall technology, and its dedicated small CVT gearbox auxiliary transmission mechanism maintains the world's largest transmission ratio record of 8.7; Its large CVT gearbox adopts steel chain transmission, which keeps the record of the maximum load torque of CVT gearbox of 380Nm. Toyota's 2.0L displacement-matched direct shift -CVT gearbox is a direct drive mode, which is superior to Nissan's 2.0L CVT in fuel economy and speed-up power performance. Toyota Holdings Aisin is still dominated by AT gearboxes, and both 6AT and 8AT gearboxes are quite good. However, as far as the actual situation in China is concerned, it is an objective fact that the CVT gearbox produced by Guangzhou GATT has a high failure rate.