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Method of calculating the design parameters of a modulator anti-lock braking system with a high flow of working fluid

100%

Zhilevich M. , Ermilov S. , Kapski D. , Vovk Y. , Lyashuk O. , Vovk I.

tom z. 110

199--210

The design dimensions of the executive hydraulic cylinders of the brake system of heavy-duty mining dump trucks cause high fluid flow during the braking process. Therefore, dimensions of the anti-blocking system modulator spool pair require unique electromagnets or hydraulic amplifiers to control. These solutions do not allow the required modulator performance. Thus, a modulator scheme with a division of the flow of fluid from the source to the brake cylinders was developed. This scheme allows during emergency braking passing, an additional amount of fluid to cylinders through the valve, installed parallel to the main valve upon pressure increase phase and controlled by the pressure difference. The task is to develop a method for calculating the main structural dimensions of a modulator. The calculation of the valve of the second cascade, installed in parallel to the main stage, is carried out for the emergency braking mode with the maximum flow rate to ensure the required performance of the braking system. The balance of fluid flows equations is compiled at the key points. The flow rate of the fluid through each of the valves is determined by the Torricelli formula, and the pressure difference across the valves is assuned equal. The obtained relations allows building a family of Q-p curves, which can be used to select the diameter and stroke of the additional valve depending on the flow rate in the brake system.

The influence of various pressures in pneumatic tyre on braking process of car with anti-lock braking system

100%

Hadryś D. , Węgrzyn T. , Miros M.

tom T. 3, z. 1

85-94

In this article has been presented the influence of various pressures in pneumatic tyre of passenger car Fiat Panda 1.3 JTD with anti-lock braking system on chosen parameters of braking process: course of braking declaration, maximum value of deceleration, braking distances.

W pracy przedstawiono wpływ zamian ciśnienia powietrza w ogumieniu pojazdu osobowego Fiat Panda 1,3 JTD wyposażonego w układ ABS na wybrane parametry procesu hamowania: przebieg opóźnienia hamowania, maksymalną wartość opóźnienia hamowania, drogę hamowania.

An analysis of hydraulic braking system reliability

100%

Walusiak S. , Dziubinski M. , Pietrzyk W.

tom 05

Antilock brake system of trolleybus

80%

Safonau A.

tom Vol. LIX, nr 1

21-30

The antilock brake system (ABS) was developed, which coordinates actions of auxiliary and working braking systems of a trolleybus. A trolleybus type 321 "Belkommunmash", equipped with the proposed ABS was tested in road conditions. The results of tests confirmed compliance of the trolleybus with requirements of the rules UN EEC No 13. Decrease in slippage of the driving wheels, improved stability, roadability and traffic safety of the trolleybus was noted.

Opracowano przeciwpoślizgowy system hamulców (ABS), który koordynuje działanie dwu systemów hamowania trolejbusu: roboczego i pomocniczego. Trolejbus typu "Belkommunmash 321", wyposażony w proponowany system ABS, był testowany w warunkach drogowych. Wyniki testów potwierdziły zgodność trolejbusu z wymaganiami normy UN EEC No 13. Odnotowano zmniejszenie poślizgu kół napędzanych, poprawę stabilności trolejbusu, lepsze trzymanie się drogi i lepsze bezpieczeństwo w ruchu.