Page 31 - i-MeIV Product Information

Brake system

7. Brakes
7-1 Brake system general

Since i-MiEV does not equipped the conventional petrol engine with generates negative pressure at intake manifold,
Electrical motor driven Vacuum pump for brake booster is adopted. and it enable to carry the same brake system for
petrol powered “i”.
i-MiEV has the larger side of brake system than that of the petrol powered “i” because increase of the vehicle weight.

Brake booster
Electrical motor driven
Vacuum pump

2010MY i-MiEV Petrol powered “i”

Front brake 14 inch Ventilated disc 13 inch Ventilated disc

Cylinder bore [mm] Φ51.1 Φ51.1
Rear brake 8 inch LT drum 8 inch LT drum

Cylinder bore [mm] Φ19.1 Φ17.5
Brake booster 8 inch single 8 inch single

Source of negative pressure Electrical motor driven Vacuum pump Intake manifold
Master cylinder Φ20.6 Φ20.6

7-2-1 Brake system: Electrical motor driven Vacuum pump
Since i-MiEV does not equipped the conventional petrol engine with generates negative pressure at intake manifold,
Electrical motor driven Vacuum pump for brake booster is adopted. and it enable to carry the same brake system for
petrol powered “i”.

Bracket

Vibration isolating rubber

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