Influence of Clearance on the Rocker Arm Pin on the Steerability and Stability of the Vehicle Motion

Abstract

The article presents an analysis of the impact of a malfunction resulting from excessive clearance on the rocker arm pin of the front suspension on the vehicle’s steerability. The first part of the article presents an analysis of the influence of the clearance on the rocker arm pin on the geometry of the suspension and steering system. The occurrence of forces acting on the rocker arm pin in various phases of the vehicle motion was analyzed. To assess the vehicle’s steering, the vehicle’s response time to sudden steering wheel movement was used. The vehicle’s response time to sudden movement of the steering wheel was used to assess the vehicle’s steerability. The second part presents the results of bench tests and traction tests of a vehicle equipped with a specially made measuring rocker arm with the possibility of simulating a clearance. The tests were carried out on a class B passenger car in selected road tests. The results of measurements obtained for the roadworthy vehicle and the vehicle with the rocker arm with clearance were compared. The influence of the clearance on the rocker arm pin on the change of vehicle steerability in steady and dynamically changing conditions was analyzed. The test results show the effect of clearance on vehicle steering and on the vehicle steerability. The study tried to determine to what extent the clearance on the rocker arm affects the vehicle’s steerability and thus the safety in road traffic.

Method for regulation of permissible irregularity of brake forces on front axle

“…The main internal disturbing factor, in this case, is the turning moment from the unevenbraking forces of the front axle. Under the influence of this moment, an initial heading angle occurs, leading to curvilinear movement and skidding of the car's rear axle [6][7].…”

“…This determines the urgency of improving the regulatory framework regulating the braking properties of a car in operating conditions and methods for their control. This work aims to develop a method for normalizing the permissible unevenness of braking forces on the front axle [1][2][3][4][5][6][7].…”

Vehicle and Traffic Safety

“…Various research methodologies were used (experimental research on real objects, simulation research, questionnaire research, etc.). Some articles directly related to vehicle safety in the field of car passive safety [1,14], active vehicle safety [7,11,12,20,26], or comfort [25]. Several papers were devoted to issues related to the operation and safety of electric vehicles [10,19,29] and autonomous vehicles [2,8,9,13,16,18].…”

Study on the Influence of an UGV Suspension System on Camera Motion of the Teleoperation System

“…In the literature, numerous research findings dedicated to the design of suspension systems for machines and vehicles can be found [41,3,35]. They primarily focus on three criteria: − health and comfort [6,17,39,42] in terms of vibration frequency and amplitude; − safety [22,29] concerning stability and motion steadiness.…”