Globally, the load capacity of continuously variable transmissions is about 10. As we all know, CVT is the least popular among transmissions. The car companies that can widely and maturely apply CVT are Tammy and Nissan, known as Japan's three giants. Generally speaking, the improvement of CVT is in the process of continuous improvement and upgrading, and Nissan's improvement of CVT is more like a change, which solves almost all the core problems of CVT.
Nissan took the lead in replacing traditional steel belts with Bosch zippers, which can withstand a maximum torque of 450 Nm, so Nissan CVT has also changed its fragile image in the past. In addition, Nissan has integrated a set of planetary gear mechanisms based on the traditional CVT, and its integration turns the CVT into a main/auxiliary transmission. This set of planetary gear sets is an auxiliary gearbox, which can effectively improve the soft start of the CVT. In general, Nissan's CVT technology is constantly being upgraded, but it is still very innovative.
According to the proverb of Honda's gearbox: "The engines outsourced by Honda are cheaper than those developed by Honda!" It can be seen that CVT is a helpless move for Honda. Since Honda lacks basic 6AT in its own research and development, and the cost of the latest 10AT gearbox is relatively high, we can only choose to outsource it. At this time, the emergence of CVT has undoubtedly just solved Honda's urgent need, but CVT is not Honda's development direction.
Toyota pioneered the CVT coaxial dual-discharge oil pump patented technology. Simply put, the dual-discharge port is designed like this. In order to allow the transmission to use two different oil passages under different workloads, the CVT It can automatically switch to the low-pressure discharge port to reduce the workload of the transmission oil pump. Currently, Toyota CVT can reduce the energy loss of the oil pump by 30%. In general, Toyota, which has made great efforts in energy conservation, has not completely solved the real disadvantages of CVT.