System test method for liquid pressure fuel tester

Abstract

A testing system of a liquid pressurized fuel tester adopts two fuel consumption meters for measurement, and is characterized in that a flowmeter is chosen to measure the amount of incoming oil in an oil incoming channel; a returning oil testing instrument which measures the amount of fuel consumption by the constant volume timing method is used for measuring the amount of oil in the oil returning channel of an engine; the flowmeter for measuring the oil amount in the oil incoming channel is a mass flowmeter; the measurement of the oil amount in the oil returning channel is completed by the liquid pressurized fuel tester; a singlechip is used for information acquisition, processing, calculation and displaying as well as examination and correction of abnormal condition; and finally a computer is used for outputting and printing the fuel consumption of the engine.

Description

technical field [0001] The invention relates to a liquid pressure fuel tester system testing method, which belongs to the technical field of fluid measurement, in particular to the technical field of fuel consumption measurement in engine bench tests. Background technique [0002] At present, in the engine bench test, the gravimetric method is generally used to measure the consumption of liquid pressure fuel, as shown in the figure figure 1 shown and the flow diagram as figure 2 Measure as shown. [0003] The gravimetric method is to use a precision electronic scale to measure the weight lost by the fuel tank per unit time, so as to calculate the fuel consumption of the engine per unit time. The test device of this method is a precision electronic scale. Take Huazhong University of Science and Technology as a representative to adopt this method (Yusheng Zhang, Chunlan Mo, Huiya Zhang et. 17 / 12 / 2004, paper No. 235, Hong Kong) [0004] The disadvantages of gravimetric mea...

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Problems solved by technology

[0004] The disadvantages of gravimetric measurement are: in order to make the cumulative consumption conform to the range and accuracy of the electronic scale, the engine is required to maintain a stable working condition for a long time. This method has low measurement accuracy and cannot measure the dynamic instantaneous fuel consumption of the engine.

[0007] The disadvantages of flow method measurement are: the test basis of this test method is based on the premise of "the fuel volume in the auxiliary fuel tank is constant". The internal fuel density is also non-constant, in which case it is difficult to measure the change in fuel mass in the drop tank or to keep the fuel mass constant, so the measurement is inaccurate

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