BLIPPING Control

WARNING: This page is about a different car, the 2011 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

This system makes transmission clutch engage readily by controlling (synchronizing) engine revolution according to the (calculation of) engine revolution after shifting down.

"BLIPPING CONTROL" functions.
- When downshifting by accelerator pedal depression.
- When downshifting by the manual mode.
  
  Fig 1: Blipping Control Block Diagram
  Courtesy of NISSAN MOTOR CO., U.S.A.
TCM selects "BLIPPING CONTROL" or "NORMAL SHIFT CONTROL" according to the gear position, the selector lever position, the engine torque and the speed when accelerating by pedal depression.
Engine speed control demand signal is transmitted from TCM to ECM under "BLIPPING CONTROL".
ECM synchronizes the engine speed according to the engine speed control demand signal.

Fig 2: Gear Position Signal Graph (Downshifting With Accelerator Pedal Depression)
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Gear Position Signal Graph (Downshifting With Manual Mode)
Courtesy of NISSAN MOTOR CO., U.S.A.