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Pressure modulator for anti-skid brake systems

  • US 4,714,300 A
  • Filed: 07/23/1986
  • Issued: 12/22/1987
  • Est. Priority Date: 07/23/1985
  • Status: Expired due to Fees
First Claim
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1. A pressure modulator for a motor vehicle brake system actuated via a pressurized brake fluid and including a master cylinder and at least one wheel brake, comprising a pressure-tight housing including means defining a pump cylinder disposed between said master cylinder and said at least one wheel brake, said pump cylinder provided with a pump plunger longitudinally displaceable therein forming an armature, said armature encompassed by a surrounding electromagnetic coil disposed securely in said housing, at least part of said armature being comprised of a polarized permanent magnet operable for displacement by an exciter current supplied to said electromagnetic coil further to displace the pump plunger in a first direction to force brake fluid to flow to at least one driven wheel associated with a wheel brake, which driven wheel is tending to spin due to excessive drive mount applied thereto, whereby the rising brake fluid pressure in said wheel brake causes wheel spin thereof to be reduced.

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