1. 2 vs 3: 停止時 N 檔煞車,離合器 1,2 都沒有壓力,且檔位調節器A 的位置不同,可能真的是切到空檔,應該比 D 檔踩煞車好, N 檔可能離合器磨損比較少
2. 4 vs 5 vs 6 vs 7, 可以看到,當2檔時速低於 20 km/hr 時,如果用較大的油門,此時扭力輸出較大時,離合器的滑差會變大,應為半離合造成離合器打滑磨損
3. 8 vs 9 高速檔時速偏低時,踩油門使離合器扭力輸出變大時,仍會有微量的離合器打滑,但轉速差比 2 檔低時速時少
結論: 停車打N 檔, 避免時速過低(塞車,蠕行)處於2檔, 應該有利於延長離合器壽命
DQ200 的變速箱, 應該也可以用 VCDS 看這些數據,得知如何選檔比較好
2017/7/30:
我有新筆電了,所以用示波圖觀察一下:
基本上就是離合器被加壓後,扭力就可以被輸出,而 input shaft 就會跟著轉動:
M1 檔:
M1-M2 檔:
D1-D2檔:
M1 檔慢速 DSG 變速箱油溫, DSG是用水冷的,所以沒有激烈操駕時,跟水溫差不多:
結構與原理:
資料來源:
1. http://www.vaglinks.com/vaglinks_com/Docs/SSP/VWUSA.COM_SSP_386_6speed_TwinClutch_DSG_Audi.pdf
2.http://www.volkspage.net/technik/ssp/ssp/SSP_308.pdf
離合器的滑差計算是根據網路上找到的技術資料的算法:
截圖不少張,全 post 太累,post 兩張代表一下:
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另外:
拖吊車:
Towing
In the event that a vehicle with S tronic has to be towed, the following restrictions apply:
• The selector lever must be in the "N" position.
• A max. towing speed of 50 kph must not be exceeded.
• A max. towing distance of 50 km must not be exceeded.
When towing (engine at standstill) the vehicle, the oil pump is not driven and there is no lubrication of rotating parts. Failure to observe the above restrictions will result in serious gearbox damage
DSG 油幫浦在上圖最左側,是利用引擎驅動的,轉速與引擎相同,如果熄火,就無法提供油壓與潤滑,所以,熄火拖車時,最高時需要低於 50 km/h, 距離也不可以超過 50 km
這段話敘述了這樣限制的原因:
easons for towing speed limit:
Example:
A vehicle breaks down in 1st gear.
The clutches are open because the system is
pressureless. The wheels drive the input shafts
and clutches via the output shafts.
If the vehicle is towed too quickly, the shafts and
gears will reach engine speeds for which they are
not designed. As mentioned previously, there is no
lubrication, which is why there is also a limit on
towing distance.
A further example illustrates the problem:
In selector lever position "P" or "N" reverse (R) gear
and 2nd gear are always selected. When a vehicle is
towed in this gear configuration, this will result in a
high speed differential between the input shafts
and the clutches, which can result in terminal
gearbox damage if the max. allowable towing
speed is exceeded.
爬行,與蠕行:
這段話可以知道,爬行與蠕行會利用離合器半離合動作,來取得平順的慢速移動,且踩煞車時會降低離合器壓合的力道,
但這動作一定會加速離合器磨損,所以沒必要盡量少用..
尤其是塞車的時候
Creep control
"Creep" refers to the creep behaviour which
a conventional automatic gearboxes with a torque
converter exhibits when the engine is idling and a
gear is selected.
The creep control function works like this:
when the engine is idling and a gear is selected,
a defined slip torque is set at the clutch (clutch
torque) causing the vehicle to "creep".
This allows the vehicle to be manoeuvred (e.g. when
parking) without using the accelerator pedal, thus
enhancing driving comfort.
The vehicle behaves as one would expect an
automatic gearbox to.
The clutch torque is adjusted to between 1 and
40 Nm, depending on the driving condition and
vehicle road speed.
A special feature of the creep control is that of
reduced clutch torque at vehicle standstill with the
brake applied, whereby less torqueis required of the
engine (the clutch is further open).
Clutch torque is reduced to approx. 1 Nm,
depending on the brake pressure.
The tendency of the vehicle to creep is reduced
accordingly.
This has a positive effect on fuel efficiency
and comfort, because the vehicle has better
acoustics when at a standstill and considerably
less brake pressure is required to hold the vehicle.
If the stationary vehicle begins to roll back on an
incline with the brake only lightly applied, clutch
torque will be increased slightly.
The vehicle must be held by increasing the brake
pressure or by applying the handbrake.
The vehicle behaves as one would expect a normal
manual gearbox to.
