Antonio156alfa
Alfista Megalomane
- 20 Gennaio 2010
- 4,734
- 7,810
- 181
- 45
- Regione
- Lombardia
- Alfa
- Mi.To
- Motore
- 1.4 Turbo benzina Multiair 135cv
Prova a motore spento spingendo la macchina e fai una frenata brusca e vedrai che l'ABS non si attiva.Non è corretto: Giulia ha la frenata elettrica, con centralina di pompaggio e ABS attive anche a motore spento (e che si attivano all'apertura dell'auto e rimangono attive per diversi minuti dopo lo spegnimento).
Vedi (fonte: manuale d'officina ufficiale FCA):
Normal wake up situation of the system
Visualizza allegato 231975
- Driver and vehicle
- Entry into vehicle
- Position in vehicle
- Switch on - startup - shut off
- Brake in by wire mode not available
- Brake in by wire mode available
From the opening of the vehicle door the ABS module is awakened. In less than 1.8 seconds it starts and performs the self-diagnosis test (primary circuit, master cylinder and the secondary circuit). The driver enters and sits in the driver's seat pressing the brake (in case of an automatic transmission) and starts the engine. The figure above shows that in less than 1.8 seconds, the brake control module is ready for normal "Brake by wire" operation.
Normal sleeping situation of the system
Visualizza allegato 231974
- Driver and vehicle
- Brake pressed - vehicle shut off
- Leaving the vehicle
- Brake in by wire mode available
- Brake in by wire mode not available
- ABS Module shut off
The driver releases the brake pedal, closes the door, locks the doors and leaves. After the doors are locked, the ABS module remains active for about 10 minutes and then shuts off. During the 10 transitory minutes, the ABS brake control module keeps its normal operating functions active. Afterwards, it passes to "Fallback" recovery operation.
Possible system wake-up scenario
Instead of existing the vehicle and locking the doors, the driver remains in the vehicle with the engine off and key off for a period of time sufficient for the ABS brake control module to turn off (sleep). Then he presses and holds brake pedal and starts engine:
- Driver and vehicle
- Driver in the vehicle
- Switch on - start-up engine
- Move or at least release brake pedal
- Brake in by wire mode not available
- Brake in by wire mode available but not completely functioning
- Brake in by wire mode available
- Awaiting release of brake pedal
- The indicator lights on the instrument panel remain lit until the driver releases the brake pedal.
- As long as the ABS module does not wake up and does not start, it does not provide the brake in by wire mode.
- Once started, the ABS module awaits the release of the brake pedal and while it is still pressed, it does not provide the "Brake by wire" functionalities and as a result, maintains the "fallback" recovery configuration.
- After the driver releases the brake pedal, the ABS module provides all the normal "Brake by Wire" operative functionalities and as soon as possible performs the routine self-diagnostic tests.
Possible scenario of system shut off.
Visualizza allegato 231972
- Driver and vehicle
- Brake pedal pressed -Vehicle stopped - Vehicle shut off
- Brake pedal pressed.
- Brake in by wire mode available
- Brake in by wire mode not available
- Brake in by wire mode available but no control of function of active stability
- ABS Module shut off
The driver presses the brake pedal, turns off the engine and keeps the brake pedal pressed. The ABS module keeps the braking system in the normal "Brake by Wire" operating function for up to about 60 minutes and compensates for the loss of oil volume by activating, when required, the electric motor.
Once the 60 minutes have elapsed, the ABS module switches off and as a result the braking system changes to the "fallback" recovery configuration.
Possible scenario of system shut off.
Visualizza allegato 231971
- Driver and vehicle
- Brake pedal pressed -Vehicle stopped - Vehicle shut off
- Brake pedal pressed.
- Leave the vehicle
- Brake in by wire mode available
- Brake in by wire mode not available
- Brake in by wire mode available but no control of function of active stability
- ABS Module shut off
The driver presses the brake pedal, turns off the engine and keeps the brake pedal pressed for a period of between 10 and 60 minutes. As long as the pedal is pressed, the ABS compensates for the loss of oil volume activating, when required, the electric motor.
The ABS module provides all the normal "Brake by Wire" operating functionality for up to 1 minute after the brake pedal was released; afterwards the system is configured to function according to the "fallback" recovery mode.
Tutti i sistemi e centraline all'avvio del quadro sono attive ma dormienti, solo nel momento in cui avi il motore quest'ultime avviano i sistemi di sicurezza, dopo che la eprom rileva tramite il sensore di fase che l'albero motore sta girando, in alcuni casi quando il sensore di fase rileva un anomalia nei giri motore, oltre al relativo messaggio di errore ti troverai anche in errore il sistema ABS.
Tempo fa qualcuno fece la prova su i rulli, e il sistema non si è attivato.
Come vedi dice che rimane attivo qualche minuto dopo aver spento la macchina non prima, come del resto anche i finestrini e la radio funziona per qualche minuto dopo aver spento l'auto e addirittura dopo aver girato il quadro su off, ma non prima di avviare il motore, solo dopo l'avvio e lo spegnimento.
Poi ripeto spegnere il quadro e magari staccare anche il polo positivo male non fa..
Ma danni non ne fai, a meno che la prendi con una mazzetta allora il discorso cambia.
Poi magari mi sbaglio e mi devo aggiornare con le nuove motorizzazioni.
Alla fine l'ABS visto dalla ruota non è nient'altro che un sensore magnetico che rileva quando la ruota sta girando e si attiva solo nel momento in cui sei in marcia e in fase di frenata le ruote si bloccano, lui si attiva e tramite la centralina rallenta la corsa delle pastiglie impedendoti di bloccare le ruote totalmente.