9HP transmission is one of the latest technology developed ZF Friedrichshafen AG. Currently, the 9HP is the number of transmission gears in the world. Nine teeth for possible commercial car casual. But for the medium-sized passenger cars, this very special achievement.
"Compared to a 6-speed transmission on the same car, the 9HP transmission could save fuel consumption by up to two digits, or rather at the rate of 16%," said Michael Hankel, Board of Management, Corporate Productions, Car Powertrain Technology Car Chassis Technology, Electronic Systems, ZF Friedrichshafen AG.
Gearbox ZF 9HP is designed specifically for front -engined car with a transverse or transverse layout. Whereas before 9HP come, only the highest gear transmission with up to 8 - speed, the engine is in the car position lengthwise ( longitudinal ) such as BMW and Lexus.
ZF 9HP developed with its British manufacturer, Land Rover. Line - up of products that are used as the first transmission this car is a Range Rover Evoque. Although the number of teeth a lot more, but the displacement is mounted on a smooth New Land Rover Evoque at the Geneva Motor Show this year.
When we tried to directly Evoque vehicle development in Schlusselfeld ZF, Germany in mid-June, almost imperceptible difference to most outstanding transmission now. It dispelled fears that the more teeth will be more uncomfortable as bothered by the frequent shifting process occurs.
The transmission is able to move quickly and smooth. In fact, almost imperceptible tugs if cruising speeds because the engine speed is relatively lower.
Although the concept has been introduced since 2009 in the event the ZF internationalen Automobil - Ausstellung ( IAA ) 2009, Frankfurt, but 9HP new Evoque was introduced at the Geneva Motor Show 2013.
ZF gear is designed to de - passenger car with 2 wheel motion and 4 wheels. ZF to develop not only for cars but also being compact cars that are increasingly popular in the world. It means that a wide scale, 9HP can be installed in nearly 75 % of total vehicles worldwide.
Dog Clutch
One of the biggest challenges is the dimension 9HP. Classic problem of transverse -engined cars are very limited transmission space width of the car. To that end, ZF outsmart by placing the gear set is not in the longitudinal axis, but rather put in it.
While the multi- disc clutch models often result in power loss, using the clutch 9HP rotator models are more efficient. Coupling is also often called the dog clutch pplications. Why were the workings of interference, and not friction as the model of multi disc. 16 % better frugality could occur due to a smaller gear ratio. At a speed of 120 km / h - using gear 9th - engine speed 2,170 rpm only, while the 6-speed transmission takes 2,890 rpm for the same speed.
0 komentar:
Post a Comment