z***7
发帖数: 555 | 1 https://www.youtube.com/watch?v=3EscjWEQp4Y
Published on Jun 16, 2017
Toyota has developed two new automatic transmissions―the 8-speed Direct
Shift-8AT and the 10-speed Direct shift-10AT. For both, various measures
were taken to minimize energy loss and heighten transmission efficiency.
Gear tooth surfaces were processed using a new technique for a lower
coefficient of friction when the gears engage, and the configuration of the
friction material used inside the clutch was optimized to reduce clutch
torque loss by approximately 50 percent during rotation (compared to a
conventional 6-speed transmission). These and other efforts resulted in
achieving one of the world's best transmission efficiencies*3. The new
automatic transmissions are more compact and lighter than comparative
conventional transmissions, lowering a vehicle's fuel requirements. And
their lower center of gravity results in both improved straight-driving
stability and better cornering stability.
Furthermore, widened gears and a newly developed high-performance compact
torque convertor combine for a broader gear lockup range. The resulting
quick and smooth response to accelerator pedal operation creates an "as
desired" direct driving feel.
In the case of the Direct Shift-10AT, even though the number of gears has
been increased to 10 (compared to eight gears in the case of the Direct
Shift-8AT), the use of close-ratio gears optimizes the range of use of each
gear, particularly in the low-to-mid speed range. The resulting smooth gear
changes, which are among the world's quickest*3, create a rhythmical and
comfortable sensation that is suitable for a premium rear-wheel-drive
vehicle.
Through such measures, fundamental vehicle performance in practical driving
situations ranging from driving around town to driving on the highway has
been improved to a degree that drivers can distinctly experience. Smooth
response to accelerator pedal operation enables "as desired" vehicle
departure and, in overtaking maneuvers, it allows lag-free and rhythmical
acceleration that meets driver expectations, even in cases of sudden and
heavy accelerator pedal use.
New 2.5-liter Direct-injection, Inline 4-cylinder Gasoline Engine
Toyota has named its new line of internal-combustion power plants "Dynamic
Force Engines". To bring out the new engines' potential to the fullest,
their basic structure was completely rethought using TNGA, and their overall
structure and configuration were wholly innovated to achieve high-level
driving and environmental performance. Work will continue to make the new
engines even more advanced.
The new engines employ high-speed combustion technology and a variable
control system. They also achieve greater thermal efficiency, resulting in
high output, due to a reduction in energy losses associated with, among
others, exhaust and cooling systems and the movement of mechanical parts.
Their lineup includes a 2.5-liter engine that has one of the world's best
thermal efficiencies*3―40 percent when used in gasoline-powered vehicles
and 41 percent when used in hybrid vehicles (HVs). This new, thoroughly
reconsidered and greatly evolved engine features numerous new technologies,
such as technologies for minute control that make it highly responsive and
allow it to generate ample torque at all speeds.
Category
Autos & Vehicles
License
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发帖数: 817 | 2 新的引擎技术什么时候会用在其它车的引擎上？比如sequioia 8缸自吸 | z***7
发帖数: 555 | 3 《父子》
如果你是一棵参天大树
我就是一粒种子
你宽大的树荫把我守护
我每天眺望你的高度
等到有一天你慢慢长大
也许我的枝干早已干枯
无论你的繁华蔓延何处
不要忘记脚下那片泥土
我知道你的辛苦 明白你的付出
却忘了如何跟你相处
我们都不善表露
可心里全都清楚
这就是血脉相传的定数
我心里有满满的爱
可是说不出
只能望着你远去的脚步
给你我的祝福
我心里有满满的爱 可是说不出
你是世间唯一的男人
让我牵肠挂肚
我知道你一直默默关注
无论我光荣或屈辱
无论成功失败都别太在乎
一定要把自己好好照顾
你给我的不只身体发肤
还有理解与宽恕
你会自己面对慢慢长路
要懂得忍让学会知足
我知道你的辛苦 明白你的付出
却忘了如何跟你相处
我们都不善表露 可心里全都清楚
这就是血脉相传的定数
我心里有满满的爱 可是说不出
只能望着你远去的脚步
给你我的祝福
我心里有满满的爱
可是说不出
你是世间唯一的男人
让我牵肠挂肚
我害怕有一天自己苍老
成为你的包袱
我会在你身旁把你搀扶
就像当初
你带着我走出人生第一步 |
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