Compensation Control Network and Test of Bus Air Brake System in Under-Pressure State

The paper aims at pressure compensation control of bus air brake system in under-pressure state, based on SAE J1939 protocol, using CAN bus technology, the nodes such as vehicle status data acquisition node, brake system pressure information collection node, brake pressure compensation controller node, brake actuator system node, test and diagnostic node were defined, hardware and software of communication interface were designed, under-pressure compensation control network of bus air brake system was built and test, the test results show reliability, stability, real-time of the network meet the requirements of brake control.

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Development of Diagnostic Algorithms for an Air Brake System: Theory and Implementation

ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control, Volume 2 ◽

10.1115/dscc2011-6127 ◽

2011 ◽

Author(s):

Sandeep Dhar ◽

Swaroop Darbha ◽

K. R. Rajagopal

Keyword(s):

Motor Vehicle ◽

Brake System ◽

Chamber Pressure ◽

Vehicle Safety ◽

Brake Pad ◽

Safety Standard ◽

Brake Pressure ◽

Brake Application ◽

Air Brakes ◽

Air Brake System

In this paper, we consider the problem of designing an algorithm for estimating the stroke of a pushrod of the air brake system. The stroke of pushrod directly relates to the braking force available at the wheels and also affects the response time. The longer the stroke, the volume available for expansion is larger and correspondingly, the response is slower. The stroke depends on the clearance between the brake pad and the drum, which can vary due to variety of factors such as thermal expansion of drum and mechanical wear. Typical safety inspections of air brakes include the measurement of the stroke of the pushrod of each brake chamber. Regulations on trucks such Federal Motor Vehicle Safety Standard (FMVSS) 121 require the inspection to be carried out at 90 psi supply pressure and at full brake application. The evolution of the brake pressure depends on the stroke of the pushrod and the area of the treadle valve, which is controlled by the driver. The treadle valve meters compressed air from the supply reservoir to the brake chamber. The proposed scheme requires the measurement of pressure and a model for predicting the evolution of brake chamber pressure in response to full application of the brake (brake pedal is fully depressed). We experimentally corroborate the effectiveness of the proposed algorithm.

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Research on double tower dryer based on air brake system of rail vehicle

Journal of Physics Conference Series ◽

10.1088/1742-6596/1948/1/012120 ◽

2021 ◽

Vol 1948 (1) ◽

pp. 012120

Author(s):

BuDu Xu ◽

Xuan Zhang ◽

ShiXi Zhang ◽

QingXuan Li ◽

XiaoYu Zhu

Keyword(s):

Brake System ◽

Rail Vehicle ◽

Air Brake System

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PERANCANGAN ALOKASI PENYIMPANAN DI GUDANG BAHAN BAKU PADA DIVISI ALAT PERKERETAAPIAN PT PINDAD (PERSERO) UNTUK MENGURANGI WAKTU DELAY MENGGUNAKAN PENDEKATAN ANALISIS FSN DAN CLASS BASED STORAGE POLICY

Jurnal Rekayasa Sistem & Industri (JRSI) ◽

10.25124/jrsi.v3i03.22 ◽

2016 ◽

Vol 3 (03) ◽

pp. 48 ◽

Cited By ~ 1

Author(s):

Yurinda Amalia ◽

Ari Yanuar Ridwan ◽

Budi Santosa

Keyword(s):

Value Added ◽

Brake System ◽

Value Stream Mapping ◽

System Delay ◽

Value Stream ◽

Future State ◽

Air Brake System

PT Pindad merupakan perusahaan manufaktur di bawah Badan Usaha Milik Negara (BUMN) yang memproduksi produk militer dan produk komersial. PT Pindad memiliki beberapa gudang, salah satunya adalah gudang Divisi Alat Perkeretaapian yang menyimpan berbagai bahan baku untuk memproduksi produk air brake system. Delay terjadi aktivitas storing dan picking, hal ini disebabkan karena adanya proses searching. Penempatan produk secara random oleh operator, menyebabkan alokasi penyimpanan SKU pada tempat penyimpanan tidak tertata rapi dan teratur. Langkah awal yang dilakukan adalah memetakan seluruh proses bisnis dan aktivitas yang terdapat pada gudang Divisi Alat Perkeretaapian PT Pindad dengan menggunakan value stream mapping (VSM) dan process activity mapping (PAM) sehingga didapatkan waktu proses dan value dari masing-masing aktivitas. Untuk itu dilakukan alokasi penyimpanan produk agar mengurangi waktu non value added dengan pengklasifikasian menggunakan analisis FSN, kemudian dilakukan slotting dan zonafikasi untuk menentukan area penempatan barang untuk-untuk masing-masing SKU berdasarkan klasifikasi. Setelah dilakukan pengklasifikasian, slotting dan zonafikasi, maka langkah selanjutnya adalah merancang future state map perancangan usulan, sehingga didapatkan disimpulkan waktu delay menurun 22% dari total waktu keseluruhan waktu proses yaitu 846,26 detik atau 14,10 menit, dan penurunan persentase non value added sebesar 17%.

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Collaborative control of a dual electro-hydraulic regenerative brake system for a rear-wheel-drive electric vehicle

Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering ◽

10.1177/0954407018754678 ◽

2018 ◽

Vol 233 (4) ◽

pp. 1035-1046 ◽

Cited By ~ 4

Author(s):

Jonathan Nadeau ◽

Philippe Micheau ◽

Maxime Boisvert

Keyword(s):

Electric Vehicle ◽

Energy Recovery ◽

Rear Wheel ◽

Brake System ◽

Force Distribution ◽

Hydraulic Brake ◽

Brake Pressure ◽

Wheel Drive ◽

Brake Force ◽

Brake Force Distribution

Within the field of electric vehicles, the cooperative control of a dual electro-hydraulic regenerative brake system using the foot brake pedal as the sole input of driver brake requests is a challenging control problem, especially when the electro-hydraulic brake system features on/off solenoid valves which are widely used in the automotive industry. This type of hydraulic actuator is hard to use to perform a fine brake pressure regulation. Thus, this paper focuses on the implementation of a novel controller design for a dual electro-hydraulic regenerative brake system featuring on/off solenoid valves which track an “ideal” brake force distribution. As an improvement to a standard brake force distribution, it can provide the reach of the maximum braking adherence and can improve the energy recovery of a rear-wheel-drive electric vehicle. This improvement in energy recovery is possible with the complete substitution of the rear hydraulic brake force with a regenerative brake force until the reach of the electric powertrain constraints. It is done by performing a proper brake pressure fine regulation through the proposed variable structure control of the on/off solenoid valves provided by the hydraulic platform of the vehicle stability system. Through road tests, the tracking feasibility of the proposed brake force distribution with the mechatronic system developed is validated.

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A New Calculating Method of Pressure Response Time of Pneumatic Brake Pipe Based on Experiments

Mathematical Problems in Engineering ◽

10.1155/2019/1039474 ◽

2019 ◽

Vol 2019 ◽

pp. 1-13 ◽

Cited By ~ 1

Author(s):

Zhiqiang Gu ◽

Shiyu Hu ◽

Fan Yang ◽

Rui Yang ◽

Jian Hua

Keyword(s):

Response Time ◽

Initial Pressure ◽

Pressure Response ◽

Brake System ◽

Tube Length ◽

Analysis Method ◽

Pipe Length ◽

Correlation Degree ◽

Gray Correlation ◽

Air Brake System

Air brake system is one of the common braking methods for buses and trucks; its excellent performance guarantees the safety of the vehicle and the stability of the braking. As an important part of the pneumatic brake system, the brake pipe is an important factor influencing the pressure response time of the pneumatic brake system. Based on the exploratory experiment of pneumatic brake pipe, the influence of pipe length, pipe diameter, inlet sonic conductance, initial pressure, and supply pressure on pipe pressure response time was analyzed by fuzzy gray correlation analysis method. The results show that tube length is the most important factor affecting the pressure response time. Combined with the analysis results of gray correlation degree, the experimental scheme of the response time of the pneumatic brake pipe was designed by the response surface experimental design method. Based on the multiparameter analysis method, the influence of the experimental parameters on the pipe pressure response time was analyzed. Based on the experimental data, the form of calculation formula is derived by dimension analysis method, which provides a theoretical basis for the selection of pneumatic brake pipes and the design of air brake system.

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