What type of lock-up allows the lock-up timing to be affected by load and driver input conditions?

What type of lock-up allows the lock-up timing to be affected by load and driver input conditions?

• A. Converted
• B. Modulated
• C. Scheduled
• D. Moderated

Answer: (B)

Modulated lock-up is about adjusting the torque converter lock-up timing in real time based on how hard the engine is working and how you’re driving. Instead of simply snapping the lock-up clutch on or off at a fixed point, a modulated system varies the clutch engagement pressure (often with a speed-based or load-based control signal). This lets the transmission slip a little under heavy load or aggressive throttle to keep temperatures down and drivability smooth, and fully engage when conditions are light or steady to maximize efficiency. In short, the timing and degree of lock-up respond to load and driver input, rather than following a fixed schedule. The other terms don’t describe this responsive behavior.

Modulated lock-up is about adjusting the torque converter lock-up timing in real time based on how hard the engine is working and how you’re driving. Instead of simply snapping the lock-up clutch on or off at a fixed point, a modulated system varies the clutch engagement pressure (often with a speed-based or load-based control signal). This lets the transmission slip a little under heavy load or aggressive throttle to keep temperatures down and drivability smooth, and fully engage when conditions are light or steady to maximize efficiency. In short, the timing and degree of lock-up respond to load and driver input, rather than following a fixed schedule. The other terms don’t describe this responsive behavior.