FUEL INJECTOR VALVE FOR LIQUIFIED FUEL

摘要

A solenoid actuated fuel injector for liquified petroleum gas (LPG), compressed natural gas (CNG) or the like has a fuel passage therethrough and a valve to control the flow of fuel through the fuel passage. The valve has a valve hea d formed of a generally flexible and substantially resilient material engageable with a valve seat to prevent fuel flow through the injector. The valve is preferably spring biase d to a closed position which compresses the valve head against the valve seat to prevent fuel flow between them. Compression of the valve head is preferably limited by contact between the metal valve body and the metal valve seat which limits the travel of the valve body relative to the valve seat. The valve head and valve seat are also construct ed to be highly resistant to wear to provide a consistent seal between them. The valve head preferably engages the valve seat over a limited surface area to facilitate disengaging the valve head from the valve seat so that the force provided by the solenoid will be sufficient to accurately move the valve to its open and closed positions.