C.r.f. Societa Consortile Per Azioni

Gianpiero Einaudi

Gianluca Morra

Stefano Re Fiorentin

Giancarlo Osella

Aldo Perotto

Constantinos Vafidis

Paolo Tubetti

Corrado Elia

Savino Luigi Lupo

Michele Pennese

A powertrain control system for management and supervision of engine and servo-assisted gearbox control modules is arranged for determining the power to be applied to the drive wheels of the vehicle as a function of signals indicative of commands imparted by the driver, of the engine and gearbox state parameters and of possible requirements from the engine and gearbox control modules and supplementary on board vehicle traction/drive control systems; calculating data indicative of the torque to be delivered at the engine drive shaft, the torque transmissible by the clutch and the required transmission ratio, as a function of the determined value of the power to be applied to the drive wheels, of the state parameters and of the requirements of the engine and gearbox control modules and the traction/drive control systems; and transmitting the calculated data as signals to the engine and gearbox control modules.

Integrated power train control system for a motor vehicle

A method of detecting and controlling detonation, including the steps of: generating ( ) a vibration signal (D) proportional to the intensity of vibration on the crankcase; wide-band-filtering ( ) the vibration signal (D) to generate a first intermediate signal; rectifying ( ) the first intermediate signal to generate a second intermediate signal; integrating ( ) the second intermediate signal to generate a first numeric value; calculating ( ) a logarithm of the first numeric value to obtain a second numeric value (X ); calculating ( ) a difference between the second numeric value (X ) and the mean value (&mgr; ) to obtain a third numeric value (&dgr; ) with a predetermined threshold value (&dgr; ); determining ( ) the presence of detonation in the event the third numeric value (&dgr; ) has a first predetermined relationship with the predetermined threshold value (&dgr; ); forming ( ) a detonation index (I ) indicating the behavior of the engine in terms of detonation; and obtaining ( ) a spark lead correction value (CA ) as a function of the detonation index (I ).

Method of detecting and controlling detonation of an internal combustion engine

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Orbassano, Italy

Gianpiero Einaudi