Recent developments in passive interconnected vehicle suspension

Abstract

This paper presents an overall review on the historical concept development and research advancement of passive hydraulically interconnected suspension (HIS) systems. It starts with an introduction to passive HIS systems and their various incarnations developed over many decades. Next, a description is provided of a recently proposed multidisciplinary approach for the frequencydomain analysis of vehicles fitted with an HIS. The experimental validation and applications of the method to both free and forced vibration analysis are discussed based on a simplified, roll-plane half-car model. A finite-elementmethod-based approddach for modelling the transient dynamics of an HIS vehicle is also briefly outlined. In addition, recent work on the investigation of NVH associated with HIS-equipped vehicles is mentioned. Discussion is then provided on future work to the further understanding of HIS and its applications. The paper concludes that interconnected suspension schemes can provide much greater flexibility to independently specify modal stiffness and damping parameters -a characteristic unique among passive suspensions. It points out that there is a need for system optimisation, and there are troublesome NVH issues that require solutions. It suggests that further research attention and effort be paid to NVH issues and system level optimisation to gain a greater understanding of HIS and to broaden its applications.

Improvement of Dynamic Wheel Load Oscillations by Coupling Pitch Motion into Bounce Motion during Pitching Motion of Passenger Vehicle

“…(34), (35) and (36) are considered, it is clearly seen that the positions of vehicle body CG within wheelbase are important factor affecting the location of oscillation center as seen in Eqs. (9), (10) and (11). Thereby, the results are analyzed with respect to the different positions of CG for different front and rear axle loads as follows:…”

“…For this, the criteria and methods were designed to couple pitch motion to bounce motion. The following conditions have been proposed by [10,11,12] to couple the motions. a) k2,f lf > k2,r b) lr k2,f lf < k2,r lr c) k2,f lf = k2,r lr 3These conditions couple the pitch to bounce motion.…”

Modeling and performance analysis of a vehicle with kinetic dynamic suspension system

“…The suspension system is one of the most significant parts of a vehicle, providing a connection between the vehicle’s road wheels and the vehicle body. 1 Generally, the basic function of a suspension system is to isolate the vehicle body from road excitations and to help maintain the preferred handling performance and ride comfort. As is well known, body motion caused by the vehicle’s four wheels can be classified into four motion modes (bounce, pitch, roll, and warp modes), and these modes play a key role in analyzing the characteristics of the vehicle.…”

Stiffness Characteristics Analysis of Interconnected Hydro-Pneumatic Suspension for Heavy Multi-Axle Vehicles

“…CAO et al studied the roll stiffness, pitch stiffness and damping characteristics of interconnected suspension system with different modes [3]. Smith et al studied the dynamic characteristics of an off-road vehicle equipped with hydraulic interconnected system [4]. Wang Zeng Quan, et al considering the factors of oil compression and piston rod friction, established a nonlinear model of interconnected hydro-pneumatic suspension, and verified by test [5].…”