Diagnosing the air brake system of commercial vehicles

2006 ◽  
Author(s):  
S.C. Subramanian ◽  
S. Darhha ◽  
K.R. Rajagopal
Keyword(s):  
Brake System ◽  
Commercial Vehicles ◽  
Air Brake System

scholarly journals Modeling the Pneumatic Subsystem of an S-cam Air Brake System

2004 ◽  
Vol 126 (1) ◽  
pp. 36-46 ◽  
Author(s):  
Shankar C. Subramanian ◽  
Swaroop Darbha ◽  
K. R. Rajagopal
Keyword(s):  
Real Time ◽  
Diagnostic System ◽  
Brake System ◽  
Experimental Setup ◽  
Commercial Vehicles ◽  
Free Model ◽  
Air Brake System ◽  
Diagnostic Applications

This paper deals with the development of a fault-free model of the pneumatic subsystem of an air brake system that is used in commercial vehicles. Our objective is to use this model in brake control and diagnostic applications. The development of a diagnostic system would be useful in automating enforcement inspections and also in monitoring the condition of the brake system in real-time. This paper presents a detailed description of the development of this model and of the experimental setup used to corroborate this model for various realistic test runs.

scholarly journals Forensic Engineering Analysis of Commercial Vehicle Air Brake Systems Performance

2018 ◽  
Vol 35 (2) ◽  
Author(s):  
Jerry S. Ogden ◽  
Mathew Martonovich
Keyword(s):  
System Performance ◽  
Difficult Problem ◽  
Performance Criteria ◽  
Brake System ◽  
Motor Vehicles ◽  
Commercial Vehicles ◽  
Weight Percentage ◽  
Acceleration Rate ◽  
Braking Force ◽  
Air Brake System

Braking systems for heavy commercial vehicles differ greatly from the design for light-duty motor vehicles. For example, 49 CFR 571.121 and 49 CFR 393.52 require loaded buses, single unit commercial vehicles, and vehicle-trailer combinations equipped with air brake systems to generate sufficient braking force to meet specific stopping distance, stopping acceleration rate, and brake force-to-weight percentage performance criteria. The combination of unique design, mechanical complexity, and maintenance issues characteristic to air brake systems also pose difficulty in the analysis of air brake system performance. Air brake system performance presents a difficult problem for the forensic engineer with limited familiarity regarding air brake system functions and the elements affecting brake performance. This paper provides insight into the evolution of air brake system standards and the applicable performance criteria for heavy commercial vehicles. The methods presented allow the forensic engineer to mathematically analyze and determine the effects of brake size, mismatched components, brake adjustment, and system air pressure on the overall braking force and stopping capabilities of air brake equipped commercial vehicles.

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

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

Modelling an electropneumatic brake system for commercial vehicles

2011 ◽  
Vol 1 (1) ◽  
pp. 41-48 ◽  
Author(s):  
P. Karthikeyan ◽  
Ch. Siva Chaitanya ◽  
S.C. Subramanian ◽  
N. Jagga Raju
Keyword(s):  
Brake System ◽  
Commercial Vehicles

scholarly journals 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

2016 ◽  
Vol 3 (03) ◽  
pp. 48 ◽  
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%.

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

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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