scholarly journals Study of the combined drive of the road train

2021 ◽  
Vol 1 (2) ◽  
pp. 26-35
Author(s):  
S.M. Zuyev ◽  
◽  
R.A. Maleyev ◽  
YU.M. Shmatkov ◽  
P.S. Shirokov ◽  
...  
Keyword(s):  
Dynamic Properties ◽  
Heavy Duty ◽  
Additional Energy ◽  
Turbine Engine ◽  
The Road ◽  
Rational Distribution ◽  
Three Phase ◽  
Parallel Circuit ◽  
General Cargo ◽  
Difficult Road

This article describes purpose, areas of application and main parameters of heavy road trains for the transportation of special and general cargo. Heavy-duty road trains with drive wheels of trailed links are considered. The advantages of using heavy-duty road trains in comparison with single trucks are shown. Additional energy sources for a standard engine (diesel or gas turbine engine for driving a three-phase generator), designed to overcome steep ascents and difficult road sections, are considered. The analysis of the turn of the road train is carried out. The advantages of ring and parallel circuit with individual control are shown. The analysis of the traction forces on the wheels and the spread of losses when turning the road train in a multi-engine drive are made. The traction and dynamic properties of road trains are presented. They characterize the limiting power and kinematic capabili-ties of road trains in various modes of movement. A search for a rational distribution of currents depending on the forces acting on the wheels and losses in the tires was made. The study of the turning of the vehicle was carried out. The values of currents, the magnitude of the spread of currents and their influence on the efficiency were calculated. The economic charac-teristics of road trains were determined. A methodology and algorithms for calculating losses and efficiency were developed. An algo-rithm for calculating at equal currents is presented. Calculations of the efficiency at various speeds and turning radii when the road train is moving are carried out. The analysis of the efficiency at the equality of currents and powers when the speed of movement is changed was made. Various design and technological measures are proposed to improve the technical characteristics of the road train.

Occurrence and Prevention of Changes in the Chemical Structure of Natural Rubber Tire Tread Vulcanizates during Service

1970 ◽  
Vol 43 (5) ◽  
pp. 1215-1224 ◽  
Author(s):  
J. I. Cunneen ◽  
R. M. Russell
Keyword(s):  
Chemical Structure ◽  
Main Chain ◽  
Heavy Duty ◽  
Structural Alterations ◽  
The Road ◽  
Rubber Tire ◽  
Before And After ◽  
On The Road ◽  
The Stability ◽  
Made In

Abstract The chemical structure of the tread vulcanizate of heavy-duty tires has been investigated before and after service on the road, and after testing under conditions designed to induce tread-lift. Significant changes occurred. These included a marked reduction in the concentration of polysulfide crosslinks, and an increase in the amount of monosulfide crosslinks and main chain modification. Experiments with vulcanizates made in the laboratory indicated that the structural alterations in the tires were due to thermal anaerobic reactions caused by heat build-up, and that they resulted in a deterioration in some of the physical properties of the tread vulcanizate. The rate of desulfuration of ‘model’ polysulfides has been found to depend critically upon the nature of the vulcanization recipe. These novel findings point the way to improving the stability of vulcanizates used in the treads of tires and, consequently, tire performance.

Control for 600-Bhp Dump Truck Gas Turbine Engine With Recuperator

1974 ◽  
Author(s):  
H. Hiraki ◽  
K. Nakao ◽  
T. Nakayama ◽  
T. Miyamaru
Keyword(s):  
Control System ◽  
Gas Turbine ◽  
Gas Turbine Engine ◽  
Dump Truck ◽  
Bench Test ◽  
Heavy Duty ◽  
Turbine Engine ◽  
Hybrid Simulator

A fuel control system for a prototype gas turbine with recuperator is described. The electronic fuel control was designed with the aid of a hybrid simulator. Its performance is verified on the bench test for a 600-bhp gas turbine engine with recuperator. Prediction of vehicle behavior and transmission requirements were made for a heavy-duty, 32-ton dump truck equipped wtih the 600-bhp gas turbine engine.

An Online Estimator for Heavy Vehicle's Mass and Road Grade

2006 ◽  
Author(s):  
M. McIntyre ◽  
A. Vahidi ◽  
D. Dawson
Keyword(s):  
Accurate Estimate ◽  
Control Area ◽  
Area Network ◽  
Heavy Duty ◽  
Two Stage ◽  
Estimation Strategy ◽  
The Road ◽  
Control Area Network ◽  
Road Grade ◽  
Stage Estimation

This work proposes a two stage estimation strategy to determine a heavy duty vehicles's mass and road grade. The estimation strategy uses standard signals available through the vehicle control area network. The first stage of this approach utilizes an adaptive least-squares estimation strategy to determine the vehicle's mass. Due to the time varying nature of the road grade, a nonlinear estimator is then developed that provides a more accurate estimate of the road grade. An estimation analysis is provided for both stages that proves, under a set of qualifying conditions, both the mass and road grade can be estimated. The validity of this two stage approach is verified using experimental data.

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