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Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
ISBN: 9781133612315

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BuyFindarrow_forward

Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
ISBN: 9781133612315
Textbook Problem

Which of the following could cause an extremely hard brake pedal?

  1. Air in the system

  • Excessively worn brake pads
  • Use of the wrong fluid
  • A leaking diaphragm in the vacuum power booster
  • To determine

    The cause of an extremely hard brake pedal.

    Explanation

    If brake pedal is hard during the pressing operation then the problem lies mainly in the power braking systems. In automobiles, mainly two types of power-assisted brake mechanism are used.

    1. Vacuum assisted: This type of system uses engine vacuum or vacuum generated by some external parts to apply the brakes. These are mainly used in cars.

    2. Hydraulic assisted: This system uses hydraulic pressure developed by the power steering pump to apply the brakes. They are used in heavy trucks and turbocharged vehicles.

    In vacuum assisted power braking the system generated the energy by opposing the engine vacuum to atmospheric pressure. The braking function is assisted by piston and cylinder, a diaphragm and bellow pins.The main function of the diaphragm is to remain balanced using the engine vacuum until the brake pedal is depressed...

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