Electrically Powered Hydraulic Steering On Medium Duty Trucks

Gupta, Vishisht V.; Williams, Daniel E.; Sherwin, Kenneth A.

doi:10.4271/2010-01-1886

Cited by 6 publications

(2 citation statements)

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“…where T c = D c 2p P s . Here, T c is the load torque of the hydraulic pump generated from the supply pressure that is derived in equations (10) to (12). w pump is the pump-rotation speed that is supposed to be same to the engine speed.…”

Section: Dynamic-model Correlation For the Proposed Driving Cyclementioning

confidence: 99%

“…The supply power of the Hybrid EPS system can be the products of the supply current and the supply voltage. 12 Under an assumption that the energy loss due to internal and external resistances is negligible, the supply current is almost equal to the armature current of the EHPS and EPS motors that are derived by equations (14) to (18). This is expressed in the following equation (19)…”

Section: Modeling Of the Hybrid Eps Systemmentioning

confidence: 99%

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An investigation on the energy-saving effect of a hybrid electric-power steering system for commercial vehicles

Park

Jeon

2018

Proceedings of the Institution of Mechanical Engineers, Part D:

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This article describes an investigation on the energy consumption of an alternative hybrid electric power steering system. The conventional hydraulic power steering system that is widely used in commercial vehicles can provide high steering-feel and reliability performances. However, since the combustion engine drives the pump, the hydraulic power steering system is energetically inefficient. To cope with this disadvantage of the hydraulic power steering system and to provide a technical base for the steering-related advanced driver assistance system, the Hybrid electric power steering system offers a solution for heavy commercial vehicles. The ''Hybrid'' of the title means that, for heavy commercial vehicles, the electric power steering system and electro-hydraulic power steering system are integrated in a ball-nut steering system. In this paper, to verify the energy-saving effect of the Hybrid electric power steering system, a dynamic model of the Hybrid electric power steering system was developed to estimate the energy consumption in the steering system. Furthermore, the fuel-efficiency test for the Hybrid electric power steering system were conducted while replacing the two steering systems (the conventional hydraulic power steering and Hybrid electric power steering system) in one vehicle on the chassis dynamometer for the proposed driving cycle. The driving cycle including the steering-angle profile has been developed to clearly investigate the effect on the energy-saving potential by the types of the steering system (hydraulic power steering and Hybrid electric power steering). The simulation results of the energy-consumption estimation showed that the hybrid electric power steering system can reduce the steering-system energy consumption by more than 50% under the proposed driving cycle. Also, the vehicle testing of the chassis dynamometer revealed that the Hybrid electric power steering system can improve the fuel efficiency of the vehicle by 1% for the specified driving cycle.

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Section: Dynamic-model Correlation For the Proposed Driving Cyclementioning

confidence: 99%

Section: Modeling Of the Hybrid Eps Systemmentioning

confidence: 99%