| 摘要 |
PURPOSE:To stably operate an engine, by supplying a rich mixture temporarily when a valve for acceleration time is closed, in the case of a liquefied petroleum gas (LPG) fuel supply device equipping a valve controlling air-fuel ratio and a valve opening when the engine is accelerated. CONSTITUTION:Liquefied petroleum gas (LPG) fuel, being allowed to flow in a valve 44 controlling air-fuel ratio and from a valve 66 opening at acceleration time through a Venturi 38, is supplied to a combustion chamber 20. When an engine is accelerated, a device, switching a selector valve 76 so as to introduce the atmosphere to a diaphragm 72, supplies acceleration fuel by opening the valve 66. If the valve 66 is closed after acceleration is finished, a mixture tends to temporarily become a lean state, but the device, controlling the air-fuel ratio control valve 44 to a rich side by a signal from a control device 80, performs a normal lean control after a predetermined time. In this way, the fuel supply device, obtaining good combustion of the engine when it is in transient operation, stably operates the engine. |
