Improvement driving characteristics of electric tricycle

Abstract

The article deals with the design of a modified system for changing of the driving direction of a threewheel vehicle with electric drive. The classic solution of three-wheeled vehicles is unstable at a certain speed, which leads to dangerous tilting. The new designed steering system of such a vehicle should contribute to increasing its safety and to widening the scope for its use. The vehicle is currently designed for one person, but it is expected to increase its capacity to two persons and their luggage. It brings changes in a construction of the vehicle and results in a change in the centre of gravity. The modified solution of the vehicle steering system increases its maximum speed. The vehicle construction consists of an electric drive located above the rear axle with torque transmission to the rear wheels. The front wheel is steered. The classic steering solution is replaced by a steering wheel that facilitates steering. The article compares the stability of a vehicle with a modified steering system to the conventional solution during driving in a curve. The calculations were performed for various speeds using the multibody simulation on the virtual model in Simpack software. The solution is a part of the project supported by the Volkswagen Slovakia Foundation oriented on the support of electromobility, students and young scientists.

Road train motion stability in BRT system

“…In the paper [8] the system of equations of a double-articulated trailed road train ( Fig. 1) is presented in the form (where mi are the masses of individual parts of the road train; Мі are the moments of resistance to the rotation of individual parts of the road train; с is the distance from the rear axle of the truck tractor to the coupling point; а is the distance from the center of mass of the truck tractor to its front axle; b1і is the distance from the center of mass of the truck tractor to its middle and rear axles; di, li is the distance from the center of mass of individual modules to the front axle and the coupling points respectively; Y1, Y1i, Y2j, Y4 are the lateral forces acting on the wheels of the front, rear axle of the truck tractor, the first and the second trailers respectively; b2j, b4 is the distance from the center of mass of the first and the second trailers to their rear axles respectively): 2 3 3 1 2 3 4 1 1 2 4 1 1 1 2 3 3 1 2 3 4 1 1 1 2 4 1 1 1 1 23 1 1 2 1 3 4 2 1 2 2 4 1 2 3 11 3 2 2 2 2 2 2 1 3 ;…”

“…In the works known today, issues of controllability and stability are considered in two aspects [6][7][8][9][10][11][12][13][14][15]: 2 MATEC Web of Conferences 254, 03007 (2019) https://doi.org/10.1051/matecconf/201925403007 MMS 2018 1. The research taking into account the characteristics of all elements of the "driver-car-road" system, which is considered as a closed-loop system of automatic control [14].…”

Analysis of driving properties of a three-wheeled vehicle with a newly designed steering system

“…Therefore in our workplace the task to solve this problem has risen. The effort has eventuated to the new technical solution of the steering system of a three-wheeled vehicle [15].…”

“…The fundamental of our technical solution is the fact, that the front part of an electric tricycle contains the combination of rotating and shifting joints, which allows in addition to the rotary movement also the shifting movement in the lateral direction [15].…”

Processing and recycling of rubber and oil wastes into hydrocarbon fuel by method of physico-chemical activation

“…The limitation of the amount of the fuel reserve of petroleum origin creates pressure on finding its substitute by alternative methods of its production [1][2][3][4][5]. Alternative fuels are mainly obtained from raw materials of other than petroleum origin (alcohols, ethers) obtained industrially from coal, peat, slate and biomass.…”