SUSPENSION SYSTEMS Making Everyday Smoother
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Development of Active Air Suspension System for Small Agricultural Vehicles
Big Data In Agriculture (BDA) 2(2) (2020) 41-46 Big Data In Agriculture (BDA) DOI: http://doi.org/10.26480/bda.02.2020.41.46 ISSN: 2682-7786 (Online) CODEN: BDAIDR RESEARCH ARTICLE DEVELOPMENT OF ACTIVE AIR SUSPENSION SYSTEM FOR SMALL AGRICULTURAL VEHICLES Kamran Ikrama, Yasir Niaza, Shanawar Hamida, Muhammad Usman Ghanib, Muhammad Zeeshan Manshad, Muhammad Adnan Bodlaha, Muhammad Nadeemb,f, Muhammad Mubashar Omarb, Faizan Shabira, Muhammad Mohsin Waqasa*, Hassan Arshadc, Robeel Alic, Ghulam Yasine, Shoaib Hassanc, M. Bilal Akramc a Departmennt of Agricultural Engineering, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan. Pakistan b University of Agriculture, Faisalabad, Pakistan c Department of Mechanical Engineering, IEFR, Pakistan d Department of Plant Pathology, College of Agriculture BZU, Bahadur Sub-campus Layyah, Pakistan e Department of Forestry and Range Management, BZU, Multan, Pakistan f Department of Engineering, Faculty of Agriculture, Dalhousie University, Canada *Corresponding Author Email: [email protected] This is an open access article distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited ARTICLE DETAILS ABSTRACT Article History: Air ride suspension carries the load on each axle with a pressurized air bag just as a high pressure balloon. This system provides the smoothest and most shock free ride of any of the known vehicle suspension system. Received 11 January 2020 An air suspension includes a multiple air spring assemblies that each includes a piston airbag and a primary Accepted 13 February 2020 airbag mounted over the piston airbag. -
Multi-Axle Air Suspension System for a Vehicle
Europaisches Patentamt European Patent Office Office europeen des brevets (g) Publication number: 0 435 587 A2 12 EUROPEAN PATENT APPLICATION @ Application number : 90314050.7 © Int CI.5 : B60G 5/00, B60G 11/27, B60G 17/052 (22) Date of filing : 20.12.90 (So) Priority : 23.12.89 GB 8929185 @ Inventor : Griffiths, Paul John 13 East Green, Sealand Manor, Sealand Deeside, Clwyd, CH5 2SG, Wales (GB) (43) Date of publication of application : 03.07.91 Bulletin 91/27 @ Representative : Spall, Christopher John et al BARKER, BRETTELL & DUNCAN 138 Hagley @ Designated Contracting States : Road BE DE DK ES FR IT NL Edgbaston Birmingham B16 9PW (GB) (71) Applicant : RUBERY OWEN-ROCKWELL LIMITED P.O. Box 10, Booth Street, Darlaston Wednesbury West Midlands WS10 8JD (GB) (3) Multi-axle air suspension system for a vehicle. @ A multi-axle air suspension system for a tipping vehicle having towards its near a rear axle (7'") and at least one other axle (7", T) forward of the rear axle, provides selective over-riding of the normal load equalising system between the axles during tipping so as to alleviate hogging bending moments on the vehicle's chassis. A selectively operable pressure reducing valve (41) is in circuit with a pressure air source, air springs (7C, 8C) of the rear axle (7"') and with first and second valves (23, 32), selectively operated by a third valve (39), which are in circuit with the air springs (7C, 8C ; 7B, 8B ; 7A, 8A) of the rear axle (7"') and the other axle(s) (7", 7). Operation of the first and second valves (23, 32) isolates the air springs (7C, 8C) of at least the rear axles (7"') from those of the other axle or axles (7", 7') and connects the pressure reducing valve (41) to the latter air springs (7B, 8B ; 7A, 8A) so as to lower the air pressure in those air springs. -
Active Air Suspension System
IJSRD - International Journal for Scientific Research & Development| Vol. 6, Issue 05, 2018 | ISSN (online): 2321-0613 Active Air Suspension System Suchit Naresh Moon Department of Mechanical Engineering Nagpur Institute of Technology, India Abstract— Air ride suspension carries the load on each axle with a pressurized air bag just as a high pressure balloon. This system provides the smoothest and most shock free ride of any of the known vehicle suspension system. An air suspension includes a multiple air spring assemblies that each includes a piston airbag and a primary airbag mounted over the piston airbag. The primary and piston airbags each have a variable volume that is controlled independently of the other for active suspension control. Air ride system provides some important following features: 1) The system automatically adjusts air pressure in the air bag so that the trailer always rides at the same height, whether lightly loaded or heavily loaded. 2) The higher air bag pressure associated with higher trailer loads automatically provides a stiffer suspension which is required for a smooth ride. 3) The lower air bag pressure for lightly loaded conditions automatically provides for a softer suspension, thus providing the same ride quality for all trailer loading conditions. Since each axle is independently supported by its own air bag, Fig. 1: Locating Suspension Units the air ride suspension is known as fully independent suspension system. The automatic control of the air bag II. FULLY ACTIVE SUSPENSION SYSTEM pressure is accomplished by a solid state electronic control system specifically designed and packaged for vehicle use. Active suspension system has the ability to response to the This system continuously checks the ride height of the vertical changes in the road input. -
Cars • Chassis & Active Safety Systems Suspension Systems in Model 164
Cars • Chassis & active safety systems Suspension systems in model 164, 221, 251 Specialist training Information module Cars • Chassis & active safety systems Suspension systems in model 164, 221, 251 Specialist training Information module r As at 12/05 This document is intended solely for use in training and is not subject to regular updating. Printed in Germany Note: © 2005 Copyright DaimlerChrysler AG The term »employees« does not imply any preference of gender and incorporated male and refers to maler Publisher: Global Training and female employees alike. This document with all its sections is protected under the laws of copyright. Its use for any purpose whatsoever requires the prior written consent of DaimlerChrysler AG. This applies in particular to its reproduction, distribution, modification, translation, recording on microfilm or storage and/or processing in electronic systems, including databases and on-line services. 1511 1724 02 - 1st Edition 12.05 42 As at 12/05 Content 11.01.2006 Title Page Suspension <> AIRmatic ..................................................................................................................................................................................................................... 1 AIRmatic W221 Signal Path / Block Diagram ..................................................................................................................................................................................... 2 AIRmatic W221 Level Stages............................................................................................................................................................................................................. -
BRAKING PERFORMANCE of AIR SUSPENDED CONVERTER DOLLIES Mr
Pages 319-335 BRAKING PERFORMANCE OF AIR SUSPENDED CONVERTER DOLLIES Mr. Scott McFarlane and Dr. Peter Sweatman Roaduser Research Pty Ltd ABSTRACT In 1996 the National Road Transport Committee (NRTC) released a national heavy vehicle axle Mass Limit Review (MLR). The MLR recommended an axle mass increase for axle groups suspended by road-friendly air-suspension. For an air-suspension to be classified as Road Friendly it is required to have a bounce frequency below 2.0Hz and have damping greater than 20% of critical. It is also a requirement that the suspension group achieves load sharing within 5%. Air suspended converter dollies have become popular in Australia, particularly the triaxle type. Triaxle dollies offer a productivity benefit of between 2.5 and 4.5 tonne when compared to a tandem converter dolly. There was concern that the increased mass offered to air-suspended dollies would significantly affect the performance of road trains under braking. The Roaduser Autosim Truck Engineering Dynamics (RATED) computer simulation models were used to simulate the performance of hinged and rigid drawbar tandem and triaxle dollies under braking. The results from the simulation showed that an air-suspended tandem converter dolly could pitch significantly under braking when compared to mechanically suspended dollies. Triaxle air suspended dollies were found to pitch somewhat less than the tandem air-suspended dolly and generated a lower longitudinal force in the coupling. This indicated that the triaxle dolly has better brake balance and should be encouraged by allowing the weight increase. Rigid drawbars on converter dollies reduce the amount of dolly pitch and hence have better brake balance. -
OFFROAD Suspension Systems
SUSPENSION SYSTEMS making everyday smoother • Increased comfort • Better driveability • More safety OFFROAD Increased comfort Driving on what are usually poor roads or off-road stretches demands a lot of the driver and the vehicle. A good air suspen- sion system minimises noise levels inside the vehicle and ensu- res a relaxing journey. Goods that are sensitive to shock are transported gently. Better driveability The constant ride height guaranteed by VB-FullAir suspension means your vehicle remains stable and responds to steering A safe and comfortable journey inputs as you expect. The dual channel control system ensures Everything under control with suspension systems from VB-Airsuspension your vehicle remains level and reduces body roll. Start the day relaxed More safety The day starts well; after loading you climb into your vehicle It’s therefore very important that your vehicle and its The (air) suspension systems from VB-Airsuspension improve in a relaxed frame of mind. suspension are in good shape. vehicle stability in crosswinds, when cornering and when What you gain: Away you go, fully loaded, and that’s when the stress levels evasive action, for example, is necessary. ✓ Constant ride height start to rise. A comfortable and properly working suspension Hidden, but effective ✓ Prevents off-centre level can make all the difference to your working day, so you’re A good suspension is hidden underneath your vehicle. You can’t ✓ Less body roll just as relaxed at the end of it as you were in the morning. see it, but it’s essential if you’re to enjoy a comfortable and safe ✓ Increased comfort journey. -
Sidecar Torsion Bar Suspension
Ural (Урал) - Dnepr (Днепр) Russian Motorcycle Part XIV: Plunger, Swing-Arm and Torsion Bar Evolution ( Ernie Franke [email protected] 09 / 2017 Swing-Arms and Torsion Bars for Heavy Russian Motorcycles with Sidecars • Heavy Russian Motorcycle Rear-Wheel Swing-Arm Suspension –Historical Evolution of Rear-Wheel Suspension Trans-Literated Terms –Rear-Wheel Plunger Suspension • Cornet: Splined Hub • Journal: Shaft –Rear-Wheel Swing-Arm Suspension • Stroller, Pram: Sidecar • Rocker Arm: Between Sidecar Wheel Axle and Torsion Bar • One-Wheel Drive (1WD) • Swing-Arm – Rear-Drive Swing-Arm • Torsion Bar (Rod) • Sway Bar: Mounting Rod • Two-Wheel Drive (2WD) • Suspension Lever: Swing-Arm – Rear-Drive Swing-Arm • Swing Fork: Swing-Arm –Not Covered: Front-Wheel Suspension Torsion Bar • Sidecar Frames and Suspension Systems –Historical Evolution of Sidecar Suspension –Sidecar Rubber Bumper and Leaf-Spring Suspension –Sidecar Torsion Bar Suspension –Sidecar Swing-Arm Suspension • Recent Advances in Ural Suspension Systems –2006: Nylock Nuts Used to Secure Final Drive to Swing-Arm –2007: Bottom-Out Travel Limiter on Sidecar Swing-Arm –2008: Ball Bearings Replace Silent-Block Bushings in Both Front and Rear Swing-Arms Heavy Russian motorcycle suspension started with the plunger (coiled spring) rear-wheel suspension on the M-72. This was replaced with the swing-arm (pendulum) and dual hydraulic shock absorbers on the K-750. Similarly the sidecar suspension was upgraded from the spring-leaf 2 to rubber isolators and a swing-arm approach in the -
Car Construction
CAR CONSTRUCTION EQUIPMENT DIMENSIONS AND SPECIFICATIONS All specifications apply to all Quarter and Half classes unless otherwise specified. Dimension’s 1. Height Quarter Midgets: ........................50” maximum, including roll cage 2. Length (Measurements include the bumpers) Quarter Midgets: 84” maximum Half Midgets: 76” minimum, 88” maximum 3. Tire Size Front Maximum 11” diameter Rear maximum 12 1/2” diameter.As branded by the manufacturer. 4. Weight Quarter Midgets: Minimum 160 lbs. Half Midgets: Minimum 170 lbs. 5. Wheelbase (Measured center to center of axle. Both sides must be within specifications.) Quarter Midgets: 42” minimum, 56” maximum Half Midgets: 48” minimum, 56” maximum 6. Wheel Tread (Measured center to center of tires.) Quarter Midgets: 28” minimum, 36” maximum Half Midgets: 28” minimum, 36” maximum Car Constrution Axle A. Axle, axle hubs, or axle nuts may not extend beyond the outer edge of the wheel rim. B. All rear axles will be made out of aluminum, titanium or steel only. Battery A. All wet-cell batteries, which are mounted in the cockpit area must be enclosed and vented out of the cockpit area. B. All batteries must be securely mounted to prevent loss during operation. C. Battery and electronic ignition equipment not allowed on or in cars in the Honda and Briggs classes. Belly Pan A. The pan must extend from the front axle to the firewall. B. The ground clearance shall not exceed 3.5”. C. The belly pan must be constructed in such a manner as to comply with D. Aluminum: minimum thickness 0.040” (1) Steel: minimum thickness 0.025” (2) No open holes in the belly pan. -
Electronic Stability Control Systems on Heavy Vehicles
U.S. Department Of Transportation National Highway Traffic Safety Administration PRELIMINARY REGULATORY IMPACT ANALYSIS FMVSS No. 136 Electronic Stability Control Systems On Heavy Vehicles Office of Regulatory Analysis and Evaluation National Center for Statistics and Analysis May 2012 People Saving People TABLE OF CONTENTS EXECUTIVE SUMMARY------------------------------------------------------ E-1 I. INTRODUCTION --------------------------------------------------- I-1 II. PROPOSED REQUIREMENTS ---------------------------------- II-1 A. Definition of ESC ------------------------------------------- II-3 B. Performance Requirements ---------------------------------II-4 1. Slowly Increasing Steer Maneuver ------------------- II-5 2. Sine With Dwell Maneuver ---------------------------- II-6 C. ESC Malfunction Telltale and Symbol ------------------- II-13 D. ESC Off Switch, Telltale and Symbol -------------------- II-14 III. HOW ESC WORKS ------------------------------------------------ III-1 A. ESC Systems ------------------------------------------------- III-1 B. How ESC Prevents Rollovers ------------------------------ III-1 C. How ESC Prevents Loss of Control ---------------------- III-3 IV. BENEFITS ----------------------------------------------------------- IV-1 A. Effectiveness of ESC and RSC ---------------------------- IV-3 B. Initial Target Population ------------------------------------ IV-7 C. Projected Target Population ------------------------------- IV-13 D. Benefits ------------------------------------------------------ IV-21 -
Study of the Torsion Bar Passive Suspension System
Minia Journal of Engineering & Technology (MJET), Vol. 37, No. 1. January 2018 STUDY OF THE TORSION BAR PASSIVE SUSPENSION SYSTEM Mohamed Khairy1, S. Allam1 and M. Rabie2 1Automotive Technology Department, Faculty of Industrial Education, Helwan University. 2Automotive and Tractor Dept., College of Engineering, Minia University. E-mail of corresponding author: [email protected]. Abstract A torsion bar passive suspension is a general term for any vehicle suspension that uses a torsion bar as its main weight bearing spring. The main advantages of a torsion bar passive suspension system are durability, easy adjustability of ride height, and small profile along the width of the vehicle. It takes up less of the vehicle's interior volume than coil springs. The purpose of this study is to investigate the effect of the ride height of a vehicle which adjusted by the torsion bar on the vehicle body vibration in torsion bar passive suspension system. In this work the study, a front suspension of double-wishbone type suspension with upper torsion bar is assigned as quarter car model and is considered for the performance index study. Tire speed, sprung mass weight and presence of the hump are taken into consideration as the operation parameters. The results show the change of the torsion bar bolt position has sufficient effect on the sprung mass acceleration Keywords: vehicle suspension systems, torsion bar, ride comfort. 1. Introduction One of the major subsystems in a modern passenger car is the suspension system. The suspension system of a road vehicle refers to the assembly between the sprung mass and the unsprung mass. -
Trim Height Inspection
3/11/2016 Document ID: 745583 2004 C adillac Escalade - AWD [1gyek63n34r121918] | Avalanche, Escalade, Suburban, Tahoe, Yukon VIN C /K Service Manual | Suspension | Wheel Alignment | Specifications | Document ID: 745583 Trim Height Inspection Trim Height Measurements Trim height is a predetermined measurement relating to vehicle ride height. Incorrect trim heights can cause bottoming out over bumps, damage to the suspension components and symptoms similar to wheel alignment problems. Check the trim heights when diagnosing suspension concerns and before checking the wheel alignment. Perform the following before measuring the trim heights: Make sure the vehicle is on a level surface, such as an alignment rack. Remove the alignment rack floating pins. Set the tire pressures to the pressure shown on the certification label. Refer to Vehicle Certification Label in General Information. Check the fuel level. Add additional weight if necessary to simulate a full tank. To ensure proper weight distribution make sure the rear storage compartment is empty. Close the doors and hood. Z Height Measurement Important: K models only the Z height must be adjusted before the alignment. The Z height dimension measurement determines the proper ride height for the front end of the vehicle. Vehicles equipped with torsion bars use a adjusting arm in order to adjust the Z height dimension. Vehicles without torsion bars have no adjustment and could require replacement of suspension components. Important: All dimensions are measured vertical to ground. Cross vehicle Z heights should be within 12 mm (0.47 in) to be considered correct. 1. Place hand on the front bumper and jounce the front of the vehicle. -
Air Suspension Specific Information
12/11/2019 Front Suspension • Wheel Alignment • Standard Procedure • 2011 Jeep Grand Cherokee (5.7L) - WK • MotoLogic CURB HEIGHT MEASUREMENT Report a problem with this article The wheel alignment is to be checked and all alignment adjustments made with the vehicle at its required curb height specification. Vehicle height is to be checked with the vehicle on a flat, level surface, preferably a vehicle alignment rack. The tires are to be inflated to the recommended pressure. All tires are to be the same size as standard equipment. Vehicle height is checked with the fuel tank full of fuel, and no passenger or luggage compartment load. Inspect the vehicle for bent or weak suspension components. Compare the parts tag on the suspect coil spring(s) to the parts book and the vehicle sales code, checking for a match. Once removed from the vehicle, compare the coil spring height to a correct new or known good coil spring. The heights should vary if the suspect spring is weak. Ride height is measured at each corner of the vehicle by calculating the difference between the cradle bolt and the center of the wheel or axle heights as follows: AIR SUSPENSION SPECIFIC INFORMATION NOTE: For vehicles with Air Suspension (SER), metric measurements must be used for accuracy AND when writing ride height values to the Air Suspension Control Module (ASCM) using a scan tool. NOTE: A different ride height setting is used for checking or performing an alignment. When measuring curb height, vehicles equipped with Air Suspension (SER) must be in the manually selected "Auto" position (5) of the terrain select switch (10), or the Normal Ride Height (NRH) mode if using a scan tool.