Development of a hybrid pneumatic-power vehicle

Abstract. The charging process is one of the critical processes in the hydro-pneumatic driveline storage system. It converts the kinetic energy of the vehicle braking and coasting to the compression energy. This energy is stored in the storage device called the accumulator. The system is planned to be used on the dual hydro-pneumatic hybrid driveline and applied to a hydraulic hybrid passenger car. The aim of this paper is to find the effect of charging parameters on the storage performance through simulation. Through the storage behaviour, the desirable and optimal sizing of the accumulator can be selected. The paper emphasized on the effect of pressure elevation, pre-charge pressure, effective volume, thermal reaction and required time of the accumulator's charging process. The circuit of charging process has been designed and simulated by using the hydraulic tool in the Automation Studio software. The simulation results were corroborated through the component specification for data rationality. Through the simulation, it was found that pre-charge pressure had a significant effect on the charging process. It determined the efficiency of the effective volume. The higher the pressure elevation, the higher the effective volume. Nevertheless, the more energy required to compress the nitrogen gas in the bladder. Besides, in term of volume displacement, higher volume displacement reduced charging time and lower the fluid temperature. The simulation had been positively highlighted the critical point in charging process which later on, benefited the sizing process in the component selection specification.

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“…where ideal ΔV is the effective volume, 1 V is volume before compression and 2 V is volume after compression.…”

Section: Methodsmentioning

confidence: 99%

“…Lately, hybrid technology has become so popular in the field of automotive due to the factor of energy-saving, environmentally friendly and also more efficient compared to conventional vehicles [1]. In the field of automotive, hybrid means the vehicle has more than one propulsion system to move the vehicle.…”

Section: Introductionmentioning

confidence: 99%

Simulation of storage performance on hydropneumatic driveline in dual hybrid hydraulic passenger car

et al. 2016

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“…Filipi researched the fuel economy improvement of a hybrid pneumatic system in [7] and Huang et al in [8] developed a hybrid pneumatic concept for vehicle powertrain. Also the compressed air is an efficient technology for diesel engines operating strategies and low cost storage tanks, applied in the power generation domain as in [9] and [10].…”

Section: Figure 1: Pneumatic Hybrid Powertrain With 3 Cylinders Enginementioning

confidence: 99%

Performance and economic optimization of an organic rankine cycle for a gasoline hybrid pneumatic powertrain

Dimitrova

Lourdais

Maréchal

2015

Energy

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Highlights:• The hybrid pneumatic powertrain is efficient for urban usage • Organic rankine cycle suits for peri-urban and holiday drives and downsized engines • Both technologies combine efficiently on combined driving cycles Abstract:This article presents an innovative concept for alternative mild hybridization. The concept is studied on a CSegment vehicle. Short term hybrid pneumatic energy storage and a waste heat recovery system are introduced for the efficiency improvement of a small downsized gasoline engine. The modelling methodology for the hybrid pneumatic powertrain is presented. The waste heat recovery system is an organic rankine cycle. An innovative methodology using energy integration and multi-objective optimization is applied for the design of the organic rankine cycle loop. The selection of the organic rankine cycle design is based on techno-economic indicators and is done by using a qualification utility function for the population of solutions on the Pareto curve. The concept of hybrid pneumatic powertrain and organic rankine cycle is evaluated on different driving cycles and the economic analysis of the customer mobility is done, according to his drive profile.

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“…Takemura et al proposed a hybrid pneumatic/electric motor, so that the hybrid actuator has better damping and ease of control than the pneumatic motor [10]. Tzeng et al presented other hybrid pneumatic power for motorcycles to investigate and develop the pneumatic motor combined with an ICE [11]. Hsu and Lu also presented a hybrid management system in motorcycles to investigate and develop the electric motor combined with an ICE [12].…”

Section: Introductionmentioning

confidence: 99%

System Identification and Integration Design of an Air/Electric Motor

Hwang

Huang

2013

Energies

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This paper presents an integration design and implementation of an air motor and a DC servo motor which utilizes a magnetic powder brake to integrate these two motors together. The dynamic model of the air/electric hybrid system will be derived and eventually leads to successful ECE-40 driving cycle tests with a FPGA-based speed controller. The testing results obtained by using the proposed experimental platform indicate that the total air consumption is about 256 L under air motor mode and the electric charge consumption is about 530 coulombs under DC servo motor mode. In a hybrid mode, the current reduction of the battery is about 18.5%, and then the service life of the battery can be improved. Furthermore, a prototype is built with a proportional-integral (PI) speed controller based on a field-programmable gate array (FPGA) in order to facilitate the entire analysis of the velocity switch experiment. Through the modular methodology of FPGA, the hybrid power platform can successfully operate under ECE-40 driving cycle with the PI speed controller. The experimental data shows that the chattering ranges of the air motor within ±1 km/h and ±0.2 km/h under DC servo motor drive. Therefore, the PI speed controller based on FPGA is successfully actualized.

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Development of a hybrid pneumatic-power vehicle

Cited by 56 publications

References 5 publications

Simulation of storage performance on hydropneumatic driveline in dual hybrid hydraulic passenger car

Simulation of storage performance on hydropneumatic driveline in dual hybrid hydraulic passenger car

Performance and economic optimization of an organic rankine cycle for a gasoline hybrid pneumatic powertrain

System Identification and Integration Design of an Air/Electric Motor

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