• 제목/요약/키워드: Hybrid electric power steering system

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대형 상용차량 하이브리드 전동식 조향 시스템 주행 성능평가를 위한 HILS 시스템 개발 (Development of HILS System for Performance Evaluation of a Heavy Commercial Vehicle Hybrid Electric Power Steering System)

  • 유춘식;최규재
    • 한국자동차공학회논문집
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    • 제25권1호
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    • pp.103-110
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    • 2017
  • Most commercial vehicles have adopted the hydraulic power steering system. To reduce fuel consumption and to improve steering controllability, a hybrid electric power steering system is being developed for commercial vehicles. In this study, the HILS (Hardware In the Loop Simulation) system equipped with a commercial vehicle hybrid electric power steering system was developed and the vehicle dynamic performance of a truck with the steering system was evaluated. The hybrid electric power steering system is composed of the EHPS motor pump, column mounted EPS system, and ball nut steering gear box for heavy commercial vehicles. The accuracy of vehicle models equipped with the HILS system was verified with comparisons between the simulation results and field test results. The road reaction forces of the steering system were generated from the vehicle model and verified using field test results. Step steering tests using the verified HILS system were carried out and the performance of a newly developed commercial vehicle hybrid electric power steering system was evaluated.

전동식 조향장치용 영구자석형 브러시리스 모터의 타입별 특성 비교 (Characteristic Comparison of Brushless Motor Type for EPS System)

  • 이민환;김일용;이충성
    • 한국자동차공학회논문집
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    • 제20권1호
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    • pp.53-60
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    • 2012
  • As enforced by the regulation on the improving fuel efficiency and increased the demand on green technology, many interests are focused on electric vehicles and hybrid vehicles. Thus the technology development in electrification of vehicle operation system, including steering and braking field, is actively progressive. Especially electric power steering substitutes for hydraulic power steering rapidly in the market, which is more complex and bigger in packaging volume compared with electric power steering system. The core component in electric power steering system is a motor, which is required to be silent and powerful to guarantee required system performance. Brushless synchronous motors are widely used and many variations of the motors are introduced in the market, while the performance of each type is not well defined or studied for electric power steering system. In this paper, recent developments in brushless synchronous motor are reviewed and compared applying finite element analysis in electromagnetic field. As results, each characteristic of different types of brushless synchronous motors is compared and summarized for optimized selection in electric power steering system.

자작형 하이브리드카의 제작 및 제어에 관한 연구 (A Study on Manufacture and Control of a Self Manufacturing Hybrid Electric Vehicle)

  • 김학선;정찬세;양순용
    • 한국자동차공학회논문집
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    • 제20권1호
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    • pp.8-13
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    • 2012
  • In this paper, Hybrid Electric Vehicle is directly designed and manufactured for base study of HEV's system and Green Car. Foundation design consists of power train design and the frame design. The power train concept includes motor, engine, generator and battery. And the concept of the frame is the single-seat of this self-made HEV. A frame installed in hybrid system contains suspension, steering wheel, seat, accelerating pedal, brake pedal, clutch handle and various chassis parts with bearings. Electromagnetic clutch is equipped to transmit engine power to drive axle. The control algorism make using LabVIEW to control of an engine and a motor depending on drive condition. A parallel type hybrid system is manufactured to control operation of a motor and an engine depending on vehicle speed.

하이브리드 트램의 시스템 구성 (Main Systems Composing Hybrid Tram)

  • 장세기;이강원;배창한
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2007년도 춘계학술대회 논문집
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    • pp.730-734
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    • 2007
  • National projects on renewable energy and new energy are driven more actively than ever in many countries for the exhaustion of fossil fuel energy from the turn of the century. Such activities began to spread out in railway industry with centering around west European countries. Electric energy is generated on the hybrid vehicle itself, which contributes to reduction of the cost for construction of the infrastructure required for the supply of electric power. Hybrid tram is mainly composed of propulsion system to control electric energy, automatic guidance system to control steering and operation, and central vehicle unit to control and monitor major electronic devices. Generation and supply of electric power are made by the combination of engine generator and battery, or fuel cell and super capacitor.

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조향장치용 인텀 샤프트 설계변수 평가를 위한 수치적 연구 (Numerical Study on Evaluation of Design Parameters of Intermediate Shaft in Steering System)

  • 강영수;두민수;김정;강범수;송우진
    • 한국정밀공학회지
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    • 제29권12호
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    • pp.1351-1359
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    • 2012
  • Due to the development of electric and hybrid vehicles, the trend has changed from hydraulic power steering system to electric power steering system (EPS). In this paper, design parameters are deduced through the structural analysis based on the finite element analysis for the intermediate shaft of the EPS on the market. By analyzing the design parameters, the structure design is improved to support the required high torque on the EPS. The numerical analysis is performed to obtain the improved design of the intermediate shaft model and the analysis results are compared with the existing model. It is noted through this numerical approach that the improved design of the intermediate shaft can be acquired the structural safety and high stiffness than existing model.