초록 ▼

A cylindrical vortex generator of a Karman shedding flow meter is set in an inlet tube of an air cleaner of a combustion engine. An air flow uniforming device such as a wire netting is disposed in the inlet tube at a position upstream of the vortex generator for producing in the inlet tube a turbule

A cylindrical vortex generator of a Karman shedding flow meter is set in an inlet tube of an air cleaner of a combustion engine. An air flow uniforming device such as a wire netting is disposed in the inlet tube at a position upstream of the vortex generator for producing in the inlet tube a turbulent but considerably uniformed air flow directed toward the vortex generator. A bypass means is arranged in the inlet tube to make a bypass flow of air directed toward the vortex generator when the combustion engine is under high speed operation.

대표청구항 ▼

An air induction apparatus for feeding a combustion engine with air which is metered by using a Karman vortex shedding flow meter to control as a result of this meterage the amount of fuel fed to the engine, comprising: an inlet tube of an air cleaner which is arranged upstream of the engine proper;

An air induction apparatus for feeding a combustion engine with air which is metered by using a Karman vortex shedding flow meter to control as a result of this meterage the amount of fuel fed to the engine, comprising: an inlet tube of an air cleaner which is arranged upstream of the engine proper; a cylindrical vortex generator of said flow meter, said generator being disposed in said inlet tube in a manner to be perpendicular to the longitudinal axis of said inlet tube; a first wire netting disposed in said inlet tube at a position upstream of said vortex generator in a manner to be perpendicular to the longitudinal axis of said inlet tube; a second wire netting disposed in said inlet tube at a position upstream of said first wire netting in a manner to be perpendicular to the longitudinal axis of said inlet tube, said second wire netting producing a turbulent but uniformed air flow directed toward said vortex generator upon flowing of the air in said inlet tube; means for defining an opening in said inlet tube at a position upstream of said first wire netting; a damper door swingably connected to said inlet tube to selectively open and close said opening; and damper door operator for operating said damper door in such a manner that under low speed operation of the engine, the damper door closes said opening, and under high speed operation of the engine, the damper door opens said opening.