All-Wheel Steering System for Heavy Truck Applications

1995 ◽  
Author(s):  
Duane R. Pillar ◽  
Eric E. Braun
Keyword(s):  
Steering System ◽  
All Wheel Steering ◽  
Heavy Truck

scholarly journals Effect of Road Profile on Suspension System of Heavy Truck

2019 ◽  
Vol 12 (2) ◽  
pp. 71-75
Author(s):  
Salem F. Salman
Keyword(s):  
Steering System ◽  
Suspension System ◽  
The Road ◽  
Road Profile ◽  
Road Roughness ◽  
Road Type ◽  
Heavy Truck ◽  
Main Factors ◽  
On The Road ◽  
The Stability

All vehicles are affected by the type of the road they are moving on it.  Therefore the stability depends mainly on the amount of vibrations and steering system, which in turn depend on two main factors: the first is on the road type, which specifies the amount of vibrations arising from the movement of the wheels above it, and the second on is the type of the used suspension system, and how the parts connect with each other. As well as the damping factors, the tires type, and the used sprungs. In the current study, we will examine the effect of the road roughness on the performance coefficients (speed, displacement, and acceleration) of the joint points by using a BOGE device.

scholarly journals Hopf Bifurcation Characteristics of Dual-Front Axle Self-Excited Shimmy System for Heavy Truck considering Dry Friction

2015 ◽  
Vol 2015 ◽  
pp. 1-20 ◽  
Author(s):  
Daogao Wei ◽  
Ke Xu ◽  
Yibin Jiang ◽  
Changhe Chen ◽  
Wenjing Zhao ◽  
...  
Keyword(s):  
Hopf Bifurcation ◽  
Dry Friction ◽  
Steering System ◽  
Front Axle ◽  
Friction Torque ◽  
The Self ◽  
Lagrange’S Equation ◽  
Excited Vibration ◽  
Heavy Truck ◽  
Manifold Theory

Multiaxle steering is widely used in commercial vehicles. However, the mechanism of the self-excited shimmy produced by the multiaxle steering system is not clear until now. This study takes a dual-front axle heavy truck as sample vehicle and considers the influences of mid-shift transmission and dry friction to develop a 9 DOF dynamics model based on Lagrange’s equation. Based on the Hopf bifurcation theorem and center manifold theory, the study shows that dual-front axle shimmy is a self-excited vibration produced from Hopf bifurcation. The numerical method is adopted to determine how the size of dry friction torque influences the Hopf bifurcation characteristics of the system and to analyze the speed range of limit cycles and numerical characteristics of the shimmy system. The consistency of results of the qualitative and numerical methods shows that qualitative methods can predict the bifurcation characteristics of shimmy systems. The influences of the main system parameters on the shimmy system are also discussed. Improving the steering transition rod stiffness and dry friction torque and selecting a smaller pneumatic trail and caster angle can reduce the self-excited shimmy, reduce tire wear, and improve the driving stability of vehicles.

Ranking Tires for Heavy Truck Steering Feel Performance Using a Simulation Model2

2006 ◽  
Vol 34 (1) ◽  
pp. 64-82 ◽  
Author(s):  
S. L. Haas
Keyword(s):  
Vehicle Dynamics ◽  
Performance Metrics ◽  
Steering System ◽  
Lateral Acceleration ◽  
Steering Wheel ◽  
Dynamics Model ◽  
Objective Testing ◽  
Steering Feel ◽  
Wheel Torque ◽  
Heavy Truck

Abstract The effects of seven different tire sets on heavy truck steering feel characteristics were demonstrated from objective testing. Also, the steering behavior and vehicle dynamics were modeled in order to determine how well the resulting simulations could rank the steering performance of the tire sets relative to the objective results. The objective testing was performed using a 6×4 tractor with a two-axle flatbed semi-trailer. Measured data included steering wheel torque, steering wheel angle, and lateral acceleration behavior resulting from on-center-type steering tests. In addition, the hydraulic pressure from the power steering system was also measured. The tests consisted of multiple cycles at 0.2 Hz and ±0.2 g. Steering-related performance metrics were selected and calculated based on the interaction between measured parameters. The same test procedure was also applied using an analytical model of a steering system. The input was steering wheel torque, and outputs included the road wheel angles at the steer axle, which were then fed into a commercial vehicle dynamics model providing the vehicle dynamics behavior along with feedback required for the steering model (e.g., king pin moments). Tire loads and slip angles were also provided by the vehicle dynamics model and used as input to a tire model predicting tire force and moment behavior. The related metrics were subsequently computed and compared to the measured results. Effects of the different tire sets on steering characteristics were seen from both the objective and simulation tests. Seven performance metrics were applied in a ranking comparison between measured and modeled results. Correlation of the modeled to measured metrics ranged from R2 values of 0.40 to 0.99 for the seven metrics considered.

Non-Off-Tracking Control for Articulated Bus With All-Wheel-Steering System

2005 ◽  
Author(s):  
Tetsuya Kaneko ◽  
Hisashi Iizuka ◽  
Ichiro Kageyama
Keyword(s):  
Tracking Control ◽  
Steering System ◽  
All Wheel Steering

J1001-1-7 Tracking Control for Advanced Guideway Bus System with All Wheel Steering System

2009 ◽  
Vol 2009.7 (0) ◽  
pp. 197-198
Author(s):  
Byungmo YANG ◽  
Tetsuya KANEKO ◽  
Shohei KITAZAWA ◽  
Ichiro KAGEYAMA ◽  
Yuzuru MATSUURA
Keyword(s):  
Tracking Control ◽  
Steering System ◽  
All Wheel Steering ◽  
Bus System

All-Wheel Steering Technology and its Development Prospects of Wheeled Vehicles

2011 ◽  
Vol 127 ◽  
pp. 257-261
Author(s):  
Xi Xia Liu ◽  
Lei Yuan ◽  
Yi Jin ◽  
Di Wu
Keyword(s):  
Technology Development ◽  
Steering System ◽  
Lateral Dynamics ◽  
All Wheel Steering ◽  
Chassis Control ◽  
Working Principle ◽  
Armored Vehicles ◽  
Vehicle Active Safety ◽  
Wheeled Vehicles ◽  
Vehicle Lateral Dynamics

The article introduces the all-wheel steering technology development process and its characteristics of the wheeled armored vehicles. The article analyses the basic system components and the working principle of all-wheel steering system. All-wheel-steering technology can be implied to improve vehicle lateral dynamics, enhance vehicle active safety of wheeled armored vehicles. It is the development of all-wheel steering system which combines the active chassis control systems to form a modular mobile platform organically.

Research on the Steering Character for Kiloton all Terrain Crane

2014 ◽  
Vol 1078 ◽  
pp. 187-190
Author(s):  
Zhong Ying Liu
Keyword(s):  
Deflection Angle ◽  
Steering System ◽  
Front Wheel ◽  
All Wheel Steering ◽  
Turning Radius ◽  
Minimum Turning Radius ◽  
Vehicle Capacity ◽  
Relationship Of ◽  
The Relationship ◽  
Two Degree Of Freedom

Based on the two degree of freedom model of kiloton all-terrain crane, he effects of relationship of deflection angle on turning radius were investigated in multi-axle steering system. MATLAB/Simulink was used to analyze the relationship of every axle in multi-axle steering and optimize the minimum turning radius. The studies show that the kiloton all-terrain crane adapted all-wheel steering driving at 5speed , and the front wheel angle was 32.3°, as compared to the rolling radius before optimization, the turning radius in all wheel turnaround reduced by 33%, which improved the vehicle capacity through the complex curve and increased the vehicle steering flexibility.

scholarly journals Design and Fabrication of Four-Wheel Steering System for Efficient Transportation Systems

2019 ◽  
Vol 8 (10) ◽  
pp. 401-407
Keyword(s):  
Automobile Industry ◽  
Steering System ◽  
Transportation Systems ◽  
Small Radius ◽  
Transport Sector ◽  
Steering Wheel ◽  
Confined Space ◽  
Bevel Gears ◽  
Key Factor ◽  
All Wheel Steering

Automobile industry is one of the most important segment for a country’s growth. India facing its own challenges due to its huge and varied transport sector. These challenges may overwhelmed by using energy efficient advancements with the customer focused approach. The driver always driving the automobile with sophisticated technologies and should feel very comfortable. Automobile moving higher than the cruising speeds stability of the vehicle is the key factor. In four-wheel navigation system the tail wheels turning opposite to the forwardfacing wheels while vehicle moves at high speeds instability chances are more. To avoid this instability rear wheels follows the same track of the forward-facing wheels while tuning of the all-wheel steering system. This paper focusing light on to the difficulty faced when all wheel steering system taking a turn in a very confined space. By switching from two wheel steering to four wheel steering owing to this the driver on the way to make turns in small radius. It also laidback for parallel parking and maneuvering the vehicle quite with no trouble on highways. In command to succeed this, a mechanism established with the two bevel gears and intermediary shaft, which transfer 100% rotating force as well turns tail wheels in out of period. The spiraling radius of the automobile with two steering wheel system is 4400 mm after switching to four-wheel steering system radius is 2596mm only. Hence, radius reduced to 1804 mm.

Multiple Limit Cycles Shimmy of the Dual-Front Axle Steering Heavy Truck Based on Bisectional Road

2019 ◽  
Vol 14 (5) ◽  
Author(s):  
Daogao Wei ◽  
Yingjie Zhu ◽  
Tong Jiang ◽  
Andong Yin ◽  
Wenhao Zhai
Keyword(s):  
Dynamic Model ◽  
Limit Cycle ◽  
Dry Friction ◽  
Bifurcation Theory ◽  
Steering System ◽  
Front Axle ◽  
Adhesion Coefficient ◽  
The Road ◽  
Heavy Truck ◽  
Multiple Limit Cycle

The shimmy problem causes considerable harm to vehicles and is difficult to solve, especially multiple limit cycle shimmy. Moreover, the dynamic behavior of the multiple limit cycle shimmy of vehicles based on a bisectional road is more complex. Shimmy is practically observed in trucks of cooperative factories during utilization. Thus, we take a heavy truck of a cooperative factory as the prototype and establish a dynamic model of the vehicle-road coupling shimmy system, considering the road adhesion coefficient and dry friction between the suspension and steering system. Based on the dynamic model, the Hopf bifurcation theory is used to qualitatively analyze the existence of the limit cycle for the vehicle shimmy system, and the multiple limit cycle shimmy phenomenon is successfully reproduced using a numerical method. Moreover, the effect of the road adhesion coefficient on the multiple limit cycle shimmy characteristic is studied. Results show that the speed interval and amplitude of the multiple limit cycle shimmy decrease with the road adhesion coefficient; when the coefficient is reduced to a certain extent, the multiple limit cycle shimmy phenomenon is not observed. In addition, the adhesion coefficient of the second axle has a stronger effect on the shimmy characteristic than that of the first axle.

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