Maserati Spyder Bedienungshandbuch PDF herunterladen (Seite 40)

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ASR system (electronic anti-skid device)

ASR system (electronic

anti-skid device)

The ASR system prevents the driving

wheels skidding during acceleration

via the engine's ECU action (delayed

spark advance, reduced engine supply

throttle opening and injection cut-off)

and that of the rear brakes.

The ASR's action helps to increase the

stability and the vehicle's active safety

when it is running, especially in the

following situations:

– internal wheel skidding on curves

because of the dynamic variations of

the load or excessive acceleration

– excessive power transmitted to the

wheels, also in relation to the

roadbed conditions

– acceleration on slippery surfaces or

where there is snow or ice,

– in the event of loss of grip on wet

roadbeds (aquaplaning).

The ASR acts in combination with the

electronic suspension adjustment

system: in normal conditions (SPORT

mode disabled) stability is prioritized

in low and medium grip conditions,

while with the SPORT mode enabled

the system gives priority to the

traction, optimizing the vehicle's

performance and allowing it.

MSR function (engine braking

torque adjustment)

The ASR system also controls the

engine braking torque when the

accelerator pedal is released under low

grip conditions (snow, ice etc.): in these

conditions, in fact, the engine's high

braking torque may cause instability of

the vehicle.

The system, using the same sensors as

the ABS, detects the skidding arising

on one or both of the driving wheels

when the accelerator is released and

opens the engine supply motorized

throttle, therebt reducing the braking

torque and restoring the driving

wheels' maximum grip conditions.

WARNING However, the maximum

deceleration that can be obtained with

the engine brake still depends on the

tire grip on the roadbed. Obviously,

snow or ice on the road greatly reduce

the grip values.

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