Why does the motorcycle clutch gearbox have such obsession and irritability?
Double clutch source 1939 Frenchman Adolf Garch (Adolf? Kgresse？ ), but unfortunately, this advanced concept is limited by the times, and industrial production technology cannot make the dual-clutch housing mass-produced for commercial use.
This kind of transmission only existed in theory and drawings for a long time in the past. It has been 24 years since the theory of double clutch was put forward, and the industrial technology of major manufacturers in the world has begun to be mass-produced. It was produced in Porsche in 1964, and it is the world's first five-speed semi-automatic dual clutch housing, which was later incorporated into Porsche 908 racing car. I used this car to participate in the passing 1000 km endurance race which was very popular with the team at that time.
Although many fans may know little about this antique five-speed semi-automatic powershift that has been obliterated by time and history, this transmission laid the foundation for Porsche PDK powershift.
With the determination to develop and produce powershift, Porsche successfully developed its own PDK dual-clutch automatic transmission with superb technology until 198 1. After that, Porsche PDK powershift was put on Porsche 956 and Porsche 962, which dominated the world endurance championship in 1980s and 1990s, and manufacturers began to realize the performance potential of powershift.
In the mid-1980s, in the era of industrial progress, both European cars and Japanese cars were a dynamic scene, but many consumers and manufacturers attached great importance to the performance of the engine, and Porsche made many improvements to the gearbox.
1987, Audi Sport with Porsche 6-speed powershift? Quattro？ Pikes peak S 1 (pikes peak? Peak? ) The mountain road showed great strength and won the championship easily. The debate about the clutch has never subsided! So, how much do you know about the past life of Double Clutch?
However, when Audi sports? Quattro？ When S 1 became famous, more audiences paid attention to Audi's big killer-Quattro four-wheel drive system. After all, dual clutch is a very radical and exaggerated concept at this time. Even though the concept of dual clutch has been put forward for nearly 50 years, it was still quite crazy for the team at that time and could not be put into the folk field.
The real reason for powershift's popularity is that Volkswagen Group was restricted by Aisin in the field of at transmission in 1990s. At that time, Volkswagen planned to switch to CVT transmission, but it would also vote to limit Bosch's patents.
At the end of 1990s, with the support of Borg Warner, Volkswagen realized the first mass production in the world and developed powershift-DSG? DQ250. Volkswagen Group installed this transmission on the first generation Audi TT car. Thanks to the blessing of this wet 6-speed powershift, it has also been highly praised in the small sports car Audi TT.
In 2008, Volkswagen launched a product called DSG? DQ200' s 7-speed dry powershift. In other words, this transmission began to ruin the reputation of my brother DQ250. This gearbox scheme is really strong in performance, but it is not commendable in quality. The transmission can't solve the heat dissipation problem under the condition of high engine speed and high torque output, and there are many uncertain factors in the transmission.
In urban congested areas and long-term low-speed driving, powershift's setback is more obvious than other transmissions. When the clutch is in the semi-clutch state for a long time, the clutch is overheated, and the dry powershift with air cooling and heat dissipation prompts the overheating to stop. With the accumulation of various problems, the transmission effect becomes worse and the wear degree is higher, which affects the service life of the dual clutch. When the dry dual clutch is worn to a certain extent, there will be various problems such as abnormal sound and reduced transmission efficiency. In the later maintenance, the maintenance price of powershift is higher than other transmissions.