US 6,854,550 B2Granted

Method of improving the control response of an automatic slip control system

AssigneeContinental Teves AG & Co. oHG

InventorsRalph Gronau, Burkhard Sappok, Gerold Schneider, Roland Caspari

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Abstract

A method of improving the control performance of a traction slip control system so that faulty control activations of the TCS control system are prevented in critical situations such as driving downhill. The invention concerns a method wherein a vehicle reference speed and a vehicle deceleration signal are derived from the rotational behavior of the vehicle wheels and wherein a vehicle deceleration signal is obtained by way of a longitudinal deceleration sensor. The course of the two deceleration signals is compared and analyzed for detecting stable or unstable wheel rotational behavior. Preferably a difference signal is formed indicating the difference between the two deceleration signals. The difference signal is evaluated by a multistage filter arrangement.

Claims8

Dependent claims

Method of improving the control performance of a traction slip control system (TCS system) by preventing or reducing control errors or faulty control activations, comprising the steps of:

collecting a vehicle reference speed from the rotational behavior of the individual vehicle wheels,
collecting a vehicle deceleration signal by means of a longitudinal deceleration sensor (B sensor),
calculating a vehicle deceleration value from said wheel rotational behavior,
comparing and analyzing said value calculated from said rotational behavior of the individual vehicle wheels with said deceleration signal produced by means of the longitudinal deceleration sensor (B sensor), for detecting stable or unstable wheel rotational behavior,
wherein a signal is produced for comparing and analyzing the deceleration signals, said signals representing the difference between the deceleration signal derived from the wheel rotational behavior and the deceleration signal produced by means of the longitudinal deceleration sensor (B sensor).

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/399,438Filed 4 Oct 2001
Priority: DE 100 51 82817 Oct 2000
Published: US 2004/0059492 A125 Mar 2004
Granted: 15 Feb 2005
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

B60T 8/1769
Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS: specially adapted for vehicles having…
B60T 8/175
Using electrical or electronic regulation means to control braking: brake regulation specially adapted to prevent excessive wheel spin during…
B60T 2270/202
ASR control systems: for all-wheel drive vehicles
B60T
Vehicle brake control systems or parts thereof