Development of Air Suspension Systems for Highway Tractors and Trailers

1970 ◽  
Author(s):  
O. Lee Henry
Keyword(s):  
Suspension Systems ◽  
Air Suspension

scholarly journals Methods for controlling the elastic damping characteristics of pneumatic seat suspensions

2021 ◽  
Vol 1 (2) ◽  
pp. 27-33
Author(s):  
M.V. Lyashenko ◽  
◽  
V.V. Shekhovtsov ◽  
P.V. Potapov ◽  
A.I. Iskaliyev ◽  
...  
Keyword(s):  
Vibrational Energy ◽  
Working Fluid ◽  
Technical Solution ◽  
Technical Literature ◽  
Seat Suspension ◽  
Suspension Systems ◽  
Damping Characteristics ◽  
Air Suspension ◽  
Wide Range ◽  
Vehicle Seat

The pneumatic seat suspension is one of the most important, and in some situations, one of the key components of the vibration protection system for the human operator of the vehicle. At the present stage of scientific and technical activities of most developers, great emphasis is placed on controlled seat suspension systems, as the most promising systems. This article analyzes the methods of controlling the elastic damping characteristics of the air suspension of a vehicle seat. Ten dif-ferent and fairly well-known methods of changing the shape and parameters of elastic damping characteristics due to electro-pneumatic valves, throttles, motors, additional cavities, auxiliary mechanisms and other actuators were considered, the advantages, application limits and disad-vantages of each method were analyzed. Based on the results of the performed analytical procedure, as well as the recommendations known in the scientific and technical literature on improving the vibration-protective properties of suspension systems, the authors proposed and developed a new method for controlling the elastic-damping characteristic, which is implemented in the proposed technical solution for the air suspension of a vehicle seat. The method differs in the thing that it im-plements a cyclic controlled exchange of the working fluid between the cavities of the pneumatic elastic element and the additional volume of the receiver on the compression and rebound strokes, forming an almost symmetric elastic damping characteristic, and partial recuperation of vibrational energy by a pneumatic drive, presented in the form of a rotary type pneumatic motor. In addition, the method does not require an unregulated hydraulic shock absorber, while still having the ad-vantage of improved vibration-proof properties of the air suspension of a vehicle seat over a wide range of operating influences.

scholarly journals Optimal design parameters of air suspension systems for semi-trailer truck. Part 2: results and discussion

2020 ◽  
Vol 33 ◽  
pp. 147-152
Author(s):  
Le Van Quynh ◽  
Nguyen Van Tuan ◽  
Vi Thi Phuong Thao ◽  
Le Quang Duy
Keyword(s):  
Optimal Design ◽  
Design Parameters ◽  
Suspension Systems ◽  
Air Suspension

A novel tripped rollover prevention system for commercial trucks with air suspensions at low speeds

2017 ◽  
Vol 232 (11) ◽  
pp. 1516-1527 ◽  
Author(s):  
Haitao Ding ◽  
Amir Khajepour ◽  
Yanjun Huang
Keyword(s):  
Road Safety ◽  
Commercial Vehicles ◽  
Dynamics Model ◽  
Air Spring ◽  
Severe Injuries ◽  
Low Speed ◽  
Suspension Systems ◽  
Rollover Prevention ◽  
Air Suspension ◽  
Prevention System

This paper presents a novel system to avoid tripped rollovers at low-speed operations for commercial vehicles with air suspension systems. This is of particular significance since truck rollovers have become a serious road safety problem, which usually lead to severe injuries and fatalities. Several active anti-rollover systems have been proposed in the past two decades; however, most of them focus on untripped rollover prevention instead of the tripped rollovers. Up to now, very few pieces of literature discuss the approaches that are used to avoid tripped rollovers of trucks. Furthermore, the air suspension is widely used for commercial vehicles, thus it provides an opportunity to prevent rollovers when properly manipulated. Therefore, a novel tripped rollover prevention system is proposed for trucks at low-speed operations with air suspensions. A roll dynamics model with an air spring is built to investigate the dynamic behavior and the time response of the whole system. More importantly, the feasibility of this new anti-rollover system is discussed and verified by the co-simulations in TruckSim and MATLAB/Simulink under two possible tripped rollover conditions.

scholarly journals Optimal design parameters of air suspension systems for semi-trailer truck. Part 1: modeling and algorithm

2020 ◽  
Vol 33 ◽  
pp. 72-77
Author(s):  
Le Van Quynh ◽  
Nguyen Van Tuan ◽  
Vi Thi Phuong Thao ◽  
Le Quang Duy
Keyword(s):  
Optimal Design ◽  
Design Parameters ◽  
Suspension Systems ◽  
Air Suspension

An Air Suspension System With Adjustable Height, Damping and Stiffness Using No Viscous Dampers

2019 ◽  
Author(s):  
Reza Kashani
Keyword(s):  
Real Time ◽  
Numerical Study ◽  
Relative Displacement ◽  
Suspension System ◽  
Viscous Dampers ◽  
Proportional Valve ◽  
Suspension Systems ◽  
Air Suspension ◽  
Stiffness And Damping ◽  
Comfortable Ride

Abstract Air suspension is gaining more and more popularity with both the auto industry and drivers. Traditionally the height adjustability aspect of air suspension systems has been their main attracting attribute. More recently, resolving the classic conflict of combining comfortable ride with sport handling in a single suspension setup has become the main attraction of air suspension. An air suspension system has been developed which in addition to height adjustment, can adjust its damping and stiffness in real time with using neither viscous dampers nor any additional actuators. This is done by real-time adjustment air flow to and from the air springs using proportional valves. Measured relative displacement and acceleration as well as estimated velocity of the sprung mass with respect to unspring mass at each corner are fedback, thru their corresponding gains, to create the control signal that adjusts the proportional valve with the goal of controlling the height, stiffness, and damping at that corner. In a numerical study followed by laboratory testing, the effectiveness of the proposed air suspension system in terms of its ability to vary the damping and stiffness as well as the height of the suspension system is demonstrated.

Adaptive vehicle posture and height synchronization control of active air suspension systems with multiple uncertainties

2019 ◽  
Vol 99 (3) ◽  
pp. 2109-2127
Author(s):  
Rongchen Zhao ◽  
Wei Xie ◽  
Pak Kin Wong ◽  
David Cabecinhas ◽  
Carlos Silvestre
Keyword(s):  
Synchronization Control ◽  
Suspension Systems ◽  
Air Suspension ◽  
Multiple Uncertainties
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