Mercedes-Benz is going to put more effort into creating a new shifter nine speeds for large displacement engines. While other automakers are offering four-speed automatic transmission, Mercedes-Benz expects the nine-speed drive can meet strict CO2 emissions and fuel economy standards while ensuring high performance engines.
Mercedes-Benz will be the maximum of nine technical experts from a traditional internal combustion engine. So far no other automaker that is interested in more than eight units of speed. Chrysler, Audi and Toyota have just joined in efforts to offer eight speed versions.
The gearbox 9G-Tronic is a big improvement to speed gearbox 7G-TRONIC seven. Probably will debut at the 2012 S-Class. The 7G-Tronic was the first seven-speed automatic transmission introduced in 2003. However, recently new eight-speed ZF transmission used by Audi and BMW overtook Mercedes Benz.
Audi has announced that its entire 2011 lineup principal, ie A4, A5 and Q5 will have eight-speed Tiptronic automatic transmission to go under the brand. The 2011 version of the BMW X6 will also have a version in the speed of eight years.
Automatic transmission automatically mean changing the gear ratios as the car moves, so the driver does not have to change gears manually. Larger cars and traffic worse were the incentives for automakers to improve the transmission from manual to automatic. The transmission cars have been sold in North America since the 1950s. In Europe, its transmission is less popular in Asian markets automatic transmission has become popular since the 1990s.
Cars with automatic transmission can be conducted more easily. Henry Ford's Model T was a significant advance in the history of the vehicle transmission. ZF Friedrichshafen, along with BMW were the first to introduce the first six-speed in 2003, comes with seven-speed Mercedes-Benz 7G-Tronic, Toyota introduced the rate of eight in the Lexus LS 460 in 2007.
ZF has developed eight-speed automatic transmission that can reach 11% fuel savings, since the priority was not the number of gears, but its minimum. The six-speed transmission developed by ZF in 2006 showed a high level in the reaction time was faster than human perception, adaptive control software that can read the intentions of the driver of your foot. The latest guidelines were intended to improve fuel consumption. However, the transmission rate also had eight steps shorter gears, said quicker acceleration and better shift quality. Only 200 milliseconds is required for the eight-speed automatic transmission to perform a shift.
If a decade ago, four-speed automatic transmission seemed sophisticated enough, recently, automakers have continued to add numbers. However, it appears that the rate of nine is the limit. One factor is that consumers do not seem interested in accepting more. Although most drivers six-speed transmission considered more convenient than the older four-speed automatic, the cost to develop new transmissions is offset by the potential fuel savings. Gear changes in the cars of the eight-speed transmission are as smooth as a piece, is not perceived as earth shattering.