Recently, multi-gear transmissions have gradually become a response to fuel efficiency and emissions problems of many auto manufacturers. Starting with the initial five-speed transmission instead of the four-speed transmission, the number of transmission gears has been increasing, and now the eight-speed transmission is all car manufacturers. The highest technical level of products offered. However, the eight stalls will also become past. Recently, the famous German transmission manufacturer ZF announced that the world’s first 9-speed automatic transmission, codenamed 9HP, will soon be available.
ZF said that this 9HP transmission is mainly designed for a four-wheel drive with a transversal engine. Compared with the current 6-speed automatic transmission, the fuel efficiency is improved by up to 16%. The best fuel consumption speed range is 1,900rpm. In comparison, the normal 6-speed automatic transmission is now at 2,600 rpm.
It is reported that this 9-speed transmission can be applied to four-wheel drive vehicles and hybrid vehicles, but the torque range is only between 280-480Nm. The 9HP transmission can provide a structural kit that adds a transfer case to the four-wheel drive system. In addition, 9HP can also choose to stop the system without the need for additional pumps.
ZF has not announced the timetable for the production of a 9-speed transmission in the mass production car. It will not follow the 16% increase in fuel consumption. The mid-size car is now expected to drop to 5.9 litres of fuel at a speed of 6.7 litres. This will be a leap forward.
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