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Which idle strategy does a controller apply when electrical load rises?

  • A.It raises the idle speed to meet the alternator load
  • B.It reduces the idle speed, which lowers the load on the engine and therefore prevents it from stalling under load
  • C.No change
  • D.It anticipates the load, opening the throttle as the load is applied rather than waiting for the speed to fall

Answer: A

Load anticipation from the alternator or the air conditioning prevents the dip that would otherwise occur. The last option describes exactly that anticipatory strategy, which makes it a correct and more precise statement. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb. Most errors here come from carrying across a result from a neighbouring case where it does not hold.

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