| 摘要 |
PURPOSE:To prevent an error of flow rate due to vapor in fuel, by providing a flow rate sensor and a thermosensor to a fuel pipe and correcting the value of the flow rate from the flow rate sensor in accordance with a signal of the thermosensor. CONSTITUTION:A detection signal of a flow rate sensor 1 provided between a gasifying passage and a fuel pump is inputted into a microcomputer 16 through a waveform shaping circuit 14 and a detection signal of a thermosensor 15 for detecting a temperature of fuel in a fuel pipe is inputted into the microcomputer 16 through an AD converter 15. Vapor containing in the fuel pipe is increased with increasing temperature, and a real flow rate QM and a flow rate Q per one pulse from the sensor 1 are varied as curves A(T<=To), B(To<T<=T1), C(T1<T<=T2), D(T2<T) shown in the figure. Accordingly, each of the temperature curves A-D is selected in accordance with a signal of a thermosensor 2 by the microcomputer 16 and the flow rate in the fuel having no error of vapor is found by correcting the signal of the sensor 1. |
