v-cone expansion device for a vehicle fuel supply amount of the test

The present invention provides a V-cone expansion device for a vehicle fuel supply amount for testing, comprising a tubular body, the main measurement channel and the bypass channel measurement, the main channel and the check valve bypass passage check valve, the main channel type V throttle bypass passage and a V-shaped orifice, the high-pressure and low-pressure line to take pressure measuring line; the main diameter greater than the measuring channel measurement channel bypass tube diameter, measured by sequentially two or more bypass channels decreases, the check valve opening pressure of the main passage is larger than the opening pressure of the check valve bypass passage, the check valve opening pressure of the bypass passage gradually decreases successively, after the check valve in the main passage and the bypass passage-way valve each V-shaped stopper opposite the main channel and the bypass passage orifice V-shaped orifice, the high-pressure pressure measuring line are provided before the main passage and the bypass passage-way check valve valve, low-pressure line, respectively taken penetration the main channel V-throttle bypass passage and the V-shaped orifice in communication with the main channel and the measuring bypass channel measurements.