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Which control blends regenerative and friction braking?

  • A.The proportioning valve, which reduces the hydraulic pressure by the amount of regeneration being provided
  • B.A brake by wire system with a pedal feel simulator
  • C.The anti-lock modulator alone, which meters the pressure to each wheel according to the regeneration available
  • D.A mechanical linkage

Answer: B

Because the pedal must feel consistent while the split between regeneration and friction varies, the pedal is decoupled and a simulator provides the feel. The modulator applies the hydraulic part. The simulator is what makes the blend imperceptible. A symptom that appears under one condition and not another is what narrows the diagnosis quickly. Naming what changes and what stays the same is the reliable route through questions of this shape. A single measurement chosen to respond to the one asymmetry beats several that respond to shared behaviour.

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