[bluedog]

Zitat von dmpantanis

If i increase the throttle in idle for 850rpm to 1100rpm its better?
I see that in drive dont have vibration only in idle.

Vibration in Idle is completely normal with this type of Car, the construction of it and the type of transmission. At 850rpm, you'd also have vibration in that car if it had a manual transmission.


If you put it in D or R, the engine has to work against the troque converter inside the transmission, and it is clear, that this ends up in some vibration. As soon as you then release the brakes, it starts rollling and vibration gets less then.


This vibrations are normal. It is a three-cylindred engine in a small, lightweight car. If it was 200kg heavier constructed, you'd have less vibration. But then it'd consume more fuel and thus be less attractive to own.


The vibration in D and R comes from the type of Transmission. In a manual transmission, when in neutral or the clutch pedal is depressed, there is no connection at all between engine and Transmission/wheels. Therefore there is little or no vibration.


That corresponds to N in your automatic transmission. No Vibration in N idle. Because the Engine is not connected to the rest of the drivetrain.


In any position other than P or N, the engine is connected to the transmission and drives the engine-sided part of the torque converter. Since the brakes are not released and therefore the car is held stationary, that causes vibration, due to the Engine working against the stationary-held turbine wheel inside the torque converter. If the brakes are then released, that turbine wheel (which is via Planetary gearsets connected to the wheels) is free to turn. Vibration stops, as the car starts rolling.


That is the reason for the vibration in D or R idle.


If you want it vibration-free, drive electric. There is then no sort of Clutch, and no combustion engine too to cause vibration. And, btw. an electric car doesn't know a state called idle neither.


Second best: Drive a heavier and more modern car. Some automatic gearboxes disconnect themselves (nothing other than to switch from D to N as long as no engine work is required, internally, while the Gear lever is left in D) when idling. And: Due to heavier, more massive construction of the car body itself, it takes less vibration over to caus resonances. But: It will cost more money and fuel. See if you find it worth that...