The method of determining the air-fuel mixture valve solenoid coil

摘要

PROBLEM TO BE SOLVED: To miniaturize an opening/closing valve for air-fuel mixture and reduce power consumption of an electromagnetic coil. ;SOLUTION: An opening/closing valve of this type is opened by moving a core 83 due to magnetic force of an electromagnetic coil 73, and moving a valve shaft 81 through the core, for supplying mixture M of fuel G and compressed air A to a combustion chamber of an internal combustion engine. Fm denotes axial force due to magnetic force of the electromagnetic coil, Fv denotes force required when the valve is opened and closed without the air-fuel mixture being supplied to the opening/closing valve, and fa denotes force of the compressed air to open the opening/closing valve. In this case, the following expression is satisfied when the magnetic force of the electromagnetic coil is determined: Fm≥Fv-fa.;COPYRIGHT: (C)1998,JPO