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Experimental study of the electrohydraulic injectors technical condition effect on the fuel efficiency of a diesel vehicle equipped with accumulator fuel-delivery system

Abstract

Fuel economy of the vehicle is a very important performance indicator characterizing the road transport operating efficiency. Therefore, its timely monitoring with the purpose of diagnostics is an urgent task. The more the mileage of the vehicle, the worse the technical condition of the accumulator fuel- delivery system (AFDS) and as a result it affects the amount of fuel consumption, but the relationship between these quantities has not been practically investigated. The article is devoted to the experimental study of the technical condition influence of the AFDS vehicles electrohydraulic injectors. Among the available methods for measuring fuel consumption, the preference was given to its direct measurement, which meant the difference in the amount of fuel which passed through the forward and return lines, the volumetric flow was measured by means of sensors with oval gears. The sensors were characterized by high reproducibility of results, stable indicators at high temperature (on average up to 80°C) and sufficient measurement accuracy (1%). The information on the passed way, speed and acceleration of the vehicle was provided by the standard sensor of the angular speed of the anti-lock braking system from the driven wheel operating without a withdrawal. The experiments were carried out both in steady motion and at acceleration of the vehicle on a smooth asphalt concrete cover with a fully depressed fuel delivery pedal. The technical condition of the electrohydraulic injectors had been previously determined in bench conditions, after which they were installed on the vehicle (GAZ-2217) and check-in tests were conducted. The paper presents the test results of a vehicle with a AFDS equipped with injectors both in a nominal technical condition and in a close to limited technical condition, as the most interesting from the diagnostic point of view.

About the Authors

S. N. Krivtsov
Irkutsk National Research Technical University
Russian Federation


V. G. Zimin
Irkutsk National Research Technical University
Russian Federation


T. I. Krivtsova
Irkutsk National Research Technical University
Russian Federation


I. V. Yakimov
Irkutsk National Research Technical University
Russian Federation


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For citations:


Krivtsov S.N., Zimin V.G., Krivtsova T.I., Yakimov I.V. Experimental study of the electrohydraulic injectors technical condition effect on the fuel efficiency of a diesel vehicle equipped with accumulator fuel-delivery system. Trudy NAMI. 2017;(1):29-36. (In Russ.)

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ISSN 0135-3152 (Print)