ANALYSIS OF THE IMPACT OF VARIOUS PRESSURES IN THE VEHICLE WHEELS ON THE WHEEL GEOMETRY

ABSTRACT

Lew K. Analysis of the impact of various pressures in the vehicle wheels on the wheel geometry. Visnyk of National Transport University. Series «Technical sciences». Scientific and Technical Collection. – Kyiv: National Transport University, 2021. – Issue 3 (50).

The steering system in a vehicle is one of the main systems that ensures its controllability and is important for road safety. The steering system consists of two main mechanisms, namely the steering gear, the task of which is to convert the rotary motion into reciprocating motion, and the steering gear, the task of which is to ensure the correct steering of the vehicle. In this case, the steering system is interconnected with the suspension of the car, in which there are four main angles of the wheels that are responsible for the correct maneuverability of the vehicle, namely: camber angle, toe angle, angle of rotation of the axle of the fist and the angle of inclination of the pivot axis of the fist.

Measuring the geometry of a vehicle's suspension has several interrelated purposes. One of them is the modification of the stability of the vehicle, that is, the effective impact on the maintenance of the vehicle on the road. Handling also depends on the geometry setting and ensures proper maintenance on the road. Well adjusted geometry ensures even tire wear on each axle. The purpose of the steering system is to maintain the correct position of the steering wheel in relation to the steering wheels.

The tests were carried out in stationary conditions at the diagnostic station of the Rzeszow University of Technology using an automatic device for measuring and regulating the air pressure in the tires of the Unitrol PA-10K car and the Launch X-631 car wheel alignment system. The object of the study was a passenger car of the Opel Agila brand. The tests were carried out for various values of air pressure in the car wheels.

Based on the above, the task was set - to demonstrate how incorrect air pressure in the wheels of a car changes the angles of inclination of the wheels of the car.

When analyzing the obtained test results, it was found that the pressure in the wheels, different from the nominal, but the same in each wheel, does not significantly affect the change in the values of the parameters of the angles of inclination of the vehicle wheels. If the pressure in the wheels on one side of the vehicle drops by 1 bar, there is a significant difference in the camber angles of the front axle. Changes in the air pressure in one of the rear wheels of the car do not significantly affect the angles of inclination of the car wheels.

KEY WORDS: AIR PRESSURE IN THE WHEELS, UNEVEN PRESSURE, WHEEL MOUNTING ANGLES, CAMBER AND TOE ANGLES, STEERING.

REFERENCES

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AUTHOR

LEW Krzysztof, PhD in Technical Sciences, Rzeszow University of Technology, associate professor, Department of Automotive Vehicles and Transport Engineering, e-mail: klew@prz.edu.pl, tel.: +48 17 865 1593, 35-959, Rzeszow, Poland, Warsaw Insurgents Boulevard 12, orcid.org/0000-0003-0019-1428.

REVIEWERS

Wojewoda Paweł, PhD in Technical Sciences, associate professor, Rzeszow University of Technology, associate professor of the motor vehicles and transport engineering department, Rzeszow, Poland.

Sakhno V.P., Doctor of Technical Sciences, professor, National Transport University, head department of automobiles, Kyiv, Ukraine.

Article language: Polish

Open Access:

http://publications.ntu.edu.ua/visnyk/50/210-220.pdf

Print date: 29.09.2021

Online publication date: 30.10.2021

 

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