Hyundai shows off direct-injected V6, four-cylinder, eight-speed automatic
04-29-10, 10:58 AM
#16
Lexus Champion
In short 8 speeds is not an overkill with today's advancements.
Example:
The ZF designed new 8-speed automatic transmission passenger cars allows for additional fuel savings of approximately six percent compared with the optimized second generation of 6-speed automatic transmission, with increased torque capacity, while utilizing the same installation space without requiring more components.
But we shouldn't lose sight of the biggest motivator for car makers to implement advanced transmissions (such as the 8 speed example given), it's simply gas mileage, no matter what other marketing hype is given.
Example:
The ZF designed new 8-speed automatic transmission passenger cars allows for additional fuel savings of approximately six percent compared with the optimized second generation of 6-speed automatic transmission, with increased torque capacity, while utilizing the same installation space without requiring more components.
But we shouldn't lose sight of the biggest motivator for car makers to implement advanced transmissions (such as the 8 speed example given), it's simply gas mileage, no matter what other marketing hype is given.
04-29-10, 11:03 AM
#17
Lexus Fanatic
Exactly, because the performance advantage is real even if not huge. But the gas mileage gain is too important for major automakers to pass up, they are looking for every technology available that doesn't degrade performance (and in this case enhances performance).
04-29-10, 12:12 PM
#18
Lexus Fanatic
In short the automakers application of 6/7/8 speed trannys have nothing to do with autobahn speeds. In fact most 6 speed tranny cars will hit top speed in 5th gear, most 7 speed tranny cars will hit top speed in 5th or 6th gear, etc., etc.
As Meowcat has pointed out the multispeed autos allow tall overdrive top gear (for max fuel economy) combined with close ratios for smooth, responsive high performance accleration, win/win.
btw - Everyday the 8 speed car is driven normally and legally at speeds over 50mph, all 8 speeds will be used.
No different than my 7 speed Mercedes or 6 speed Lexus, all gears are used in normal/legal/moderate daily driving everyday.
As Meowcat has pointed out the multispeed autos allow tall overdrive top gear (for max fuel economy) combined with close ratios for smooth, responsive high performance accleration, win/win.
btw - Everyday the 8 speed car is driven normally and legally at speeds over 50mph, all 8 speeds will be used.
No different than my 7 speed Mercedes or 6 speed Lexus, all gears are used in normal/legal/moderate daily driving everyday.
Last edited by IS-SV; 04-29-10 at 06:12 PM. Reason: sp
Thread
Thread Starter
Forum
Replies
Last Post
