1989-05-01

Nissan's New “High-Drivability” Vibration Control System 891157

Attenuation of fore and after vehicle vibration caused by transient throttle pedal maneuvering is a key factor in achieving a good drivability.
The dynamics of this vibration is analyzed considering torque generated by combustion as the exciting force. The relationship between vibration attenuation and improvement of drivability is determined using a subjective, low frequency vibration test. Through these analyses and tests, a new vibration control system is developed which controls the above noted torque by providing optimum adjustment of ignition timing. Decreasing fore and after vehicle vibration without adversely affecting vehicle performance, this control system improves drivability in both FF and FR cars by more than 1.0 evaluation point.

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