What Causes the Jerking During Start-up with a 7-Speed Wet Dual-Clutch Transmission?
2 Answers
7-speed wet dual-clutch transmission jerking during start-up is caused by clutch sensor failure. Below is an introduction to clutch-related content: Clutch: The clutch is located in the flywheel housing between the engine and the transmission. The clutch assembly is secured to the rear plane of the flywheel with screws, and the output shaft of the clutch serves as the input shaft of the transmission. Function: The function of the clutch is to allow gradual engagement between the engine and the transmission, ensuring smooth vehicle start-up. It temporarily disconnects the link between the engine and the transmission to facilitate gear shifting and reduce impact during gear changes. During emergency braking, the clutch separates to prevent overload in the transmission and other drivetrain components, providing a certain level of protection.
When experiencing jerky starts with a 7-speed wet dual-clutch transmission while driving, I've pondered the possible causes. Issues with clutch plate engagement, especially when the oil thickens in cold conditions leading to rough friction, can cause the car to lurch during takeoff. Another factor could be overly aggressive software logic, where the shifting program is set too abruptly and fails to synchronize with throttle inputs. Additionally, aged or insufficient transmission fluid can impair lubrication; forcing the transmission before the oil warms up may also exacerbate the jerking. Poor driving habits, such as sudden throttle application or aggressive acceleration at low speeds, can highlight these issues. It's advisable to regularly check and refresh the fluid, start gently after warming up the car, and seek professional software updates or clutch inspections for severe cases. Combining these measures can improve most situations—never overlook routine maintenance.