Method and system for drivetrain oscillation detection and contr

Details Method and system for drivetrain oscillation detection and contr Method and system for drivetrain oscillation detection and contr

1995-05-05

1996-04-30

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Speed-controlled

Odd condition or device detection

180197, 303158, 303195, 303169, B60T 832

Patent

active

055118674

ABSTRACT:
A method and system for modifying anti-lock brake control to a vehicle experiencing drivetrain-induced oscillations. A wheel speed of each of the wheels is sensed to generate a corresponding speed signal. A drivetrain-induced oscillation condition is detected in one of two ways. First, a wheel speed peak count is determined for each of the wheels. A drivetrain-induced oscillation is then detected if multiple peaks occur within a predetermined period of time. Alternatively, a frequency of oscillation for each of the wheel speeds is determined and compared to a predetermined frequency threshold. Upon determining that the vehicle is experiencing drivetrain-induced oscillation during an ABS event, brake pressure is applied to the driven wheels at approximately the same frequency as the frequency of oscillation of the drivetrain-induced oscillation.

REFERENCES:
patent: 4992945 (1991-02-01), Kumpfmueller

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