What are the reasons for the jerky feeling when braking?

[JonathanDella]

The reasons for the jerky feeling when braking include upshift jerkiness, downshift jerkiness, and low-speed jerkiness. Below are detailed explanations and solutions: Upshift jerkiness: This is mostly caused by the transmission's response speed being insufficiently fast, where the upshift speed cannot keep up with the throttle input speed. As a result, a jerky sensation occurs during the moment of gear shifting. Downshift jerkiness: This is often due to the intervention of the energy recovery system. Once the driver releases the throttle pedal or presses the brake pedal, the generator immediately starts working, placing a load on the engine and affecting its speed. This causes the engine speed to become out of sync with the clutch plate speed, leading to a jerky sensation. Low-speed jerkiness: During low-speed driving, the gear frequently shifts between first and second gears, causing the clutch to repeatedly disengage and engage. The power transmission cannot be smoothly completed in a short time, resulting in common low-speed jerkiness. Jerky sensations during startup and low-speed driving are usually normal, often caused by the turbocharger engaging at low RPMs, which affects the engine speed.