Ghulam Ishaq Khan Institute of Engineering Sciences and Technology

About: Ghulam Ishaq Khan Institute of Engineering Sciences and Technology is a education organization based out in Topi, Pakistan. It is known for research contribution in the topics: Quantum efficiency & Diode. The organization has 618 authors who have published 940 publications receiving 10674 citations.

Investigation of the characteristics of the fuel injection pump of a diesel engine fuelled with viscous vegetable oil-diesel oil blends

Abstract: The potential of vegetable oils as an alternative to diesel fuel has already been proved. Nevertheless, the high viscosity of vegetable oils poses some problems concerning their use in unmodified vehicle diesels. In particular, distortion of the speed characteristics of a distributor fuel injection pump with a maximum-minimum speed mechanical governor when using sunflower oil-diesel oil blends has been observed. A diesel engine fuelled by a viscous blend could not develop its rated power. After fuel delivery was increased to retain the rated power, the engine was overfuelled at lower speeds and the smoke limit was exceeded. In the present paper, measures required to retain the characteristics of an injection pump fuelled by viscous blends are described. This can be done by readjusting the pump governor and changing the hydraulic characteristics of the fuel delivery system.

Multi-mode vibration based electromagnetic type micro power generator for structural health monitoring of bridges

Abstract: This article presents the development of multi-mode vibration based electromagnetic type micro power generator (MPG). Along the stainless steel planar spring (SPS) and magnet assembly, a movable coil (MC) is a novel addition to the resonant frequencies of the device. The design with MCs on either side of the magnet provide higher power generation for the same footprint of the device at multiple modes. Computer numerical control (CNC) milling machine, wire-cut electric discharge machine (EDM) and 3D printer are used to fabricate the MCs, SPS and spacers respectively to yield a MPG with an overall volume of 29.03 cm3. The developed MPG is characterized to generate power at four different resonant frequencies below 100 Hz. At 3rd mode (82 Hz) the developed MPG is able to produce a maximum 33 mV open circuit voltage, 14.5 mV load voltage and a power of 68.4 μW. Furthermore, the present development and experimentation of the MPG with a yielded power density of 2.35 μW/cm3 at 2 g acceleration can be regarded as guidelines for multi-mode devices.