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Research Papers: Fuel Combustion

Development of Wobble-Plate-Type Fuel Pump in Compression Ignition Engine Fueled With Dimethyl Ether

[+] Author and Article Information
Hyun Kyu Suh

Assistant Professor
Division of Mechanical
and Automotive Engineering,
College of Engineering,
Kongju National University,
1223-24 Cheonan Daero, Seobuk-gu,
Cheonan-si, Chungnam 331-717, South Korea
e-mail: hksuh@kongju.ac.kr

1Corresponding author.

Contributed by the Internal Combustion Engine Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received June 13, 2014; final manuscript received November 3, 2014; published online December 30, 2014. Assoc. Editor: Stephen A. Ciatti.

J. Energy Resour. Technol 137(3), 032208 (May 01, 2015) (7 pages) Paper No: JERT-14-1186; doi: 10.1115/1.4029104 History: Received June 13, 2014; Revised November 03, 2014; Online December 30, 2014

This experimental work describes the operation of a wobble-plate-type fuel pump for the stable supply of dimethyl ether (DME) fuel and evaluates its application possibility in a compression ignition engine. To achieve this, different types of flow control valves (normally open and normally closed types) were installed on the wobble-plate-type fuel pump. At the same time, the variations in fuel flow rate, torque, and temperature variation in the main parts of the pump were investigated under various operating conditions using a pump performance test system. In addition, a dummy-rail, which has half the volume of a common-rail, was installed to analyze pump stability under high flow rate/high load conditions. The wobble-plate-type fuel pump has showed satisfactory performance for DME fuel supply. The maximum flow rate (∼60 kg/h) is two times higher and the maximum torque value (∼32 N m) is three times higher than the required fuel flow and torque for stable driving of the DME engine (∼30 kg/h and ∼10 N m), respectively. Application of dummy-rail in wobble-plate-type fuel pump system would be a good solution to control the instability of pump operation in high flow rate/high load conditions.

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Figures

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Fig. 1

Schematic diagram of the wobble-plate-type fuel pump

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Fig. 2

Schematic diagram of the pump performance test system and flow control valves. (a) Pump performance test system. (b) Normal close type valve. (c) Normal open type valve.

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Fig. 3

Effect of flow control valve type on the DME flow rate. (a) Normally closed-type control valve. (b) Normally open-type control valve.

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Fig. 4

Effect of valve control duty on the flow rate variations of the wobble-plate-type fuel pump

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Fig. 5

Effect of valve control duty on the torque variations of the wobble-plate-type fuel pump

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Fig. 6

Effect of valve control duty on the temperature variation of the main parts of the wobble-plate-type fuel pump. (a) Pump inlet temperature. (b) Pump return temperature. (c) Pump body temperature. (d) Rail return temperature.

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Fig. 7

Effect of orifice diameter in the dummy-rail on the flow rate variation of the dummy-rail

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Fig. 8

Effect of orifice diameter in the dummy-rail on the torque performance of the wobble-plate-type pump

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Fig. 9

Effect of orifice diameter in the dummy-rail diameter on the temperature of the common-rail returns part

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Fig. 10

Summary of possible control of the wobble-plate-type pump

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Fig. 11

Injection rate characteristics of DME fuel

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