ECU controlled intelligent lift axle dropping and lifting system for heavy trucks

The roadway infrastructure constantly deteriorates because of environmental conditions, but other factors such as exposure to heavy trucks exacerbates the rate of deterioration. Therefore, decision-makers are constantly searching for ways to optimize allocation of the limited funds for repair, maintenance, and rehabilitation of New Jersey’s infrastructure. New Jersey legislation requires operators of overweight (OW) trucks to obtain a permit to use the infrastructure. The New Jersey Department of Transportation (NJDOT) issues a variety of permits based on the types of goods carried. These permits allow OW trucks to use the infrastructure either for a single trip or for multiple trips. Therefore, one major concern is whether the permit revenue of the agency can recoup the actual cost of damage to the infrastructure caused by these OW trucks. This study investigates whether NJDOT’s current permit fee program can collect enough revenue to meet the actual cost of damage to the infrastructure caused by these heavy-weight permit trucks. The infrastructure damage is estimated by using pavement and bridge deterioration models and New Jersey permit data from 2013 to 2018 containing vehicle configuration and vehicle route. The analysis indicates that although the cost of infrastructure damage can be recovered for certain permit types, there is room for improvement in the permit program. Moreover, based on permit rules in other states, the overall rank of the New Jersey permit program is evaluated and possible revisions are recommended for future permit policies.

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Study on Elevator Drive System Dynamics Simulation of Rail Transport Conveyer

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.511-512.619 ◽

2014 ◽

Vol 511-512 ◽

pp. 619-622 ◽

Cited By ~ 3

Author(s):

Shou Cheng Li ◽

Xue Jun Wang

Keyword(s):

Design Research ◽

System Modeling ◽

Metallurgical Industry ◽

Electrolytic Cell ◽

Rail Transport ◽

Dynamics Simulation ◽

Speed Ratio ◽

Technical Problems ◽

Transportation Equipment ◽

Lifting System

Rail transport conveyer is special transportation equipment that is widely used in the field of metallurgical industry. It is the key to ensure equipment operation efficiency on a production site. But the low lift system efficiency and poor reliability are difficult technical problems in the enterprise. In this case, rail transport conveyer uses the worm gear and screw nut lifting mechanism. The project carries on rail vehicle lifting system modeling and dynamic simulation study through Solid Edge ST5 and ADAMS, combined with simulation technology, virtual prototype design. Research purpose is in order to match the coefficient of friction between the screw and screw nut better, and to match different speed ratio for the drive gear pair and the lifting mechanism being in empty back to travel and work schedule. Another aim is to match the speed of the lifting speed and walking speed, and to reduce the error probability. Results show that the motor can get better speed matching relation with lifting mechanism through research, further optimizing the structure of lifting system parameters. Through the analysis and structure optimization, we can improve the reliability of rail transport vehicle lift system, and implement efficient fast for copper anode lifting and positioning precision. The ultimate goal is to achieve vertical hanging in electrolytic cell anode plate, and to make electrolytic operation to achieve the best state.

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High Efficient Viscoelastic Damper for Heavy Trucks

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.215-216.318 ◽

2012 ◽

Vol 215-216 ◽

pp. 318-321 ◽

Cited By ~ 2

Author(s):

Sai Fei Zhang ◽

Xiao Ling Liu ◽

Yong Liu

Keyword(s):

Flow Rate ◽

Viscous Damping ◽

Calculation Formula ◽

Performance Curve ◽

Test Results ◽

Viscoelastic Damper ◽

Damping Force ◽

Heavy Trucks ◽

High Efficient ◽

Damper Design

In this paper, a new viscoelastic damper design for heavy trucks is presented and a calculation formula of viscous damping force considering the effect of Viscoelastic Fluids (VF) flow rate is carried out. By numerically simulating this equation, curves of the viscoelastic damper performance curve is obtained, and the results show that theoretical calculation result and the test results are well consistent, with the exception at the start point. Theoretical curves are more plumpness in compared with test curves.

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