Introduction to Maserati
Quattroporte
ABS operating principle
1. 2. 3. 4. 5.
Vehicle speed Wheel speed during braking Wheel acceleration Solenoid valve current Pressure in the braking wheel’s hydraulic circuit
Stage 1) Wheel deceleration nearing limit: locking risk (-a ) Stage 2) Circuit pressure reduction: brake force reduction, wheel deceleration reduction Stage 3) Pressure maintenance: wheel speed decreases, then rises again Stage 4) Pressure increase: wheel acceleration to value + A Stage 6) Peripheral acceleration reduction Stage 7) Maintenance Stage 8) Pressure increase: wheel acceleration +a, vehicle and wheel speeds similar Stage 9) Maximum pressure: maximum brake force Operation speed: From 4 to 10 adjustments are carried out every second, depending on the friction conditions. Processing takes just a few milliseconds.
CAUTION!
Performance of the ABS system is strongly affected by the condition of the wheel/tyre assembly. For the correct operation of the system it is of most importance that the vehicle is fitted with rims, tyres and brake pads approved by the manufacturer and in perfect working order.
Maserati Academy
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