Relative spin speed traction control

Details Relative spin speed traction control Relative spin speed traction control

1996-03-04

1998-04-14

Nguyen, Tan Q.

Boots, shoes, and leggings

364426027, 364424024, 303128, 303133, 180197, 2461681, B60T 832, B61C 1508

Patent

active

057400431

ABSTRACT:
An apparatus for providing relative spin speed traction control on a railway vehicle. Such apparatus includes a wheel spin detection device connected to receive a plurality of input signals; one of such input signals being an externally generated axle rate signal which represents an acceleration/deceleration rate of a particular wheel/axle set being monitored with respect to wheel slippage. This device generates a spin speed selection output signal and a respective axle's wheel spin detection signal. A wheel spin correction device connected to receive as input signals; a power/brake signal which represents when such vehicle is either in a braking mode or not, a spin speed selection output signal and the respective axle's wheel spin detection signal. This device determines the appropriate output force command signal selected from remove, hold and apply and also generates an output signal indicating a spin correction being in progress or not in progress for a respective axle. A wheel spin axle force command signal generating unit connected to receive a power/brake signal, an output force command signal and a signal indicative of spin correction, for generating a re-application jerk limiting output signal and communicating this signal to respective truck 1 and truck 2 propulsion control units. A speed normalization unit connected to receive raw axle speed signals, a power/brake signal, axle rate signals and an output signal representative of car level spin for generating an output signal representative of normalized axle speed.

REFERENCES:
patent: 4095147 (1978-06-01), Mountz
patent: 4347569 (1982-08-01), Allen, Jr. et al.
patent: 4941099 (1990-07-01), Wood et al.
patent: 4987543 (1991-01-01), Wood et al.
patent: 5471387 (1995-11-01), Wood et al.

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