Document Type
Thesis
Date of Award
5-31-1985
Degree Name
Master of Science in Mechanical Engineering - (M.S.)
Department
Mechanical Engineering
First Advisor
John Vincent Droughton
Second Advisor
Bernard Koplik
Third Advisor
Aaron Deutschman
Abstract
A six cylinder, 200 cu. in. spark ignition engine, model 1-AC-100-200 manufactured by Ford was tested by means of a Clayton dynamometer, model 8-200. The purpose of the test was to establish a reference base and to determine the effects of ultrasonic excitation on performance and combustion characteristics of the internal combustion engine. Variable load tests were performed at full throttle, 90% throttle, 60% throttle, and 40% throttle for the standard carburetor and the carburetor modified for ultrasonic excitation. Power was supplied by a Firbra-Sonics, model G-100 Mark 3, Ultrasonic generator. Exhaust gas concentrations were measured by means of a United technologies, Hamilton lest Systems, model CEA-640 Non-Dispersive Infrared Analyzer with a Polarographic oxygen sensor. Significant improvements, (e.g. as high as 8%), were observed in enthalpic efficiency, and brake specific fuel consumption. Improvements in overall (e.g. all engine cylinders) air-fuel ratios were as high as 3% whereas individual cylinders showed improvements as high as 10%. Significantly, it should be noted that the reduction in carbon monoxide emissions resulted in leaner overall engine operation.
A comprehensive bench test was also performed on the Ford 1100 carburetor which was modified to accept the UTHE model 25 AT ultrasonic transducer operating at constant throttle and at variable vacuum and power level settings. Power to the ultrasonic horn was suoolied by a UTHE 10 watt power logicon model 10 CA as well as the aforementioned 20 watt Fibrasonics power generator. From a statistical analysis of the effects of ultrasonnic excitation, as observed from bench testing the simulated configuration, ultrasonic excitation significantly decreases the fuel mass rate of flow as the power input to the transducer is increased.
Recommended Citation
Kooman, Michael John, "The effects of ultrasonic excitation of a hydrocarbon fuel on the performance characteristics of a spark ignition engine" (1985). Theses. 3446.
https://digitalcommons.njit.edu/theses/3446
