EP0223358A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Anti-lock brake control apparatus
Assignee: Motors Liquidation Co
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Filing: 1986-09-16
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Granted: —
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Expires: 2006-09-16
Abstract
Abstract An anti-lock control apparatus is described that prevents a wheel lockup condition by identifying the brake pressure that produces the maximum possible braking effort during each brake pressure application period and applying a predetermined fraction of the identified pressure after an incipient wheel lockup condition is sensed. The predetermined fraction provides for adaptive adjustment of the brake pressure if the identified brake pressure is in error until a pressure is applied that produces substantially the maximum possible braking effort.
Inventors
- 👤 Alexander Kade
- 👤 Harland Glenn Hopkins
- 👤 Mutasim Abdurrahman Salman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 20:13
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/321; B60T8/3255; B60T8/326; B60T8/17; B60T8/176; B60T8/1763; B60T8/17636; B60T8/34; B60T8/50; B60T8/5056; B60T8/58; Y; Y10; Y10S; Y10S303/00; Y10S303/02; Y10S303/03; Y10S303/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
166 words
I. An anti lock control apparatus for a brake - (10) of a wheel (II) of a vehicle for limiting the brake pressure applied to the brake, comprising detecting means (100,102) for detecting an incipient wheel lockup condition; and reapplying means (108-112) for reapplying the brake pressure following a detected incipient wheel lockup condition; characterised by monitoring means (94) for monitoring the braking force tending to accelerate the wheel during the application of brake pressure; by storing means - (96,98) for storing the value of brake pressure corresponding in time to the maximum brake force monitored following each application of brake pressure; and in that the reapplying means reapplies the brake pressure to a value that is a predetermined fraction of the last stored value of brake pressure, whereby the brake pressure is lowered by the predetermined fraction each time the reapplied brake pressure results in an incipient wheel lockup condition until a stable brake pressure is reapplied which establishes substantially the maximum possible braking force.
Claim 2
Dependent Claim
46 words
An anti-lock control apparatus as claimed in Claim I, characterised by releasing means (90,128) for releasing the brake pressure in response to the sensed incipient wheel lockup condition to allow wheel speed recovery; the reapplying means (10& 112) reapplying the brake pressure following wheel speed recovery.
Claim 3
Dependent Claim
33 words
An anti-lock control apparatus as claimed in Claim I or Claim 2 characterised by applying means (12,14,20) for applying the brake pressure at a value in accordance with a vehicle operator brake command.
Claim 4
Dependent Claim
194 words
An anti-lock control apparatus as claimed in Claim 3, characterised in that the applying means - (12,14,20) applies brake pressure in accordance with a brake pressure command value; by setting means (106) for setting the value in accordance with an operator requested brake pressure when the operator requested brake pressure is less than a maximum allowable brake pressure; in that the reapplying means (108-112) sets the brake pressure command value in accordance with a predetermined fraction of the maximum allowable brake pressure when the operator requested brake pressure is greater than the maximum allowable brake pressure; by ramping means (114-118) for ramping the maximum allowable brake pressure at a predetermined rate when the operator requested brake pressure is greater than the maximum allowable brake pressure; and by responsive means (126,128) responsive to a detected incipient wheel lockup condition for disabling the applying means, for setting the maximum allowable brake pressure to the last stored value of brake pressure, and for enabling the releasing means (90,128) to release the wheel brake pressure to allow wheel speed recovery from an incipient wheel lockup condition; the reapplying means disabling the releasing means and enabling the applying means.
Claim 5
Independent Claim
90 words
A method of operating an anti-lock control apparatus for a brake (10) of a wheel (11) of a vehicle comprising monitoring the braking force tending to accelerate the wheel during the application of brake pressure; storing the value of brake pressure corresponding in time to the maximum brake force monitored following each application of brake pressure; detecting an incipient wheel lockup condition; and reapplying the brake pressure following a detected incipient wheel lockup condition to a value that is a predetermined fraction of the last stored value of brake pressure.
References Cited (Backward Citations)
US4094555A
Cited
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