Abstract
The paper presents the results of comparative research of selected most popular vapor phase LPG pulse injectors. A group of brand new injectors was compared with the ones already in service. The investigations aimed at determining of the parameters of the electromagnetic circuit, involved flow tests and the response time to the pulse. The coil parameters were determined using an RLC bridge for different feed frequencies. For the flow tests, where, for safety reasons, air was applied instead of vapor phase LPG, an original test stand was applied. The same test stand was used for the assessment of the response time. In the flow tests, volumetric flow rate reduced to normal conditions was analyzed at different feed frequencies. The maximum variant of the volumetric flow was also analyzed. The determined response times for the pulse have shown differences depending on the design of the actuator, coil parameters or rigidity of the springs. As a result, only some of the injectors realized their tasks in the pulse-response relation. The presented results may be useful in simulation research as a source of data for the initiation of calculations as well as in the global aspect when estimating the fuel flow rate.
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