Top-of-rail lubrication rate control by the hydraulic pulse widt

Details Top-of-rail lubrication rate control by the hydraulic pulse widt Top-of-rail lubrication rate control by the hydraulic pulse widt

1998-02-23

2000-06-20

Bucci, David A.

Lubrication

Rail or rail vehicle wheel lubricator

On vehicle

188 38, 239 67, 239 69, 239 71, 222 54, 222399, B61K 302

Patent

active

060766379

ABSTRACT:
A lubrication system for a railroad locomotive applies a lubricant with great accuracy in computer-controlled, precise quantities behind the last axle of the last locomotive such that the lubricant is consumed by the time the entire train has passed under all track, speed, temperature and train size conditions. Hydraulic pulse-width modulation (PWM or % PWM) controls the quantity of lubricant delivered. Time is divided into a series of windows each consisting of a few seconds. Lubricant delivered from a pressurized tank through long hoses to a solenoid controlled valve is then metered by the duration within this time window for which the computer computes and opens the valve. Compensation is provided for train tonnage and lubricant temperature as well as track curvature and train speed.

REFERENCES:
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patent: 5570694 (1996-11-01), Rometsch
patent: 5791369 (1998-08-01), Nishino et al.

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