| 摘要 |
PURPOSE:To feed proper quantity of liquidized gas to a mixer by controlling the secondary chamber of vaporizer to predetermined pressure level upon variation of the pressure and the composition of liquidized gas and correcting the variation. CONSTITUTION:Upon temperature rise to cause pressure rise in pressure-resistant container 1, the pressure in primary chamber 7 functioning to the secondary valve 14 will increase to enable easy opening of secondary valve 14 thus to increase the gas pressure in secondary chamber 10. The pressure rise is detected through a pressure sensor 28 and fed to a control unit 31 where arythmetic processing is performed to feed a drive signal to a control valve 39 thus to increase the negative pressure in negative pressure chamber 35 and to lower the opening force of secondary valve 14. Upon variation of the composition of liquidized gas, the composition is calculated through the control unit 31 on the basis of electric signals from pressure sensor 29 and temperature sensor 30 to determine necessary air-fuel ratio and to control the gas pressure in secon dary chamber 10 such that predetermined liquidized gas will be fed to the mixer 23.
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