The invention is based on a throttle valve connection piece as defined hereinafter. A throttle valve connection piece is already known (German Offenlegungsschrift 29 52 375; U.S. Pat. No. 1,422,896), in which a throttle valve is heated. The heating device is an electrical resistance heater, the hot wires of which are applied to a surface of the throttle valve. This arrangement has the disadvantage of pronounced vulnerability to corrosion of the surface of the hot wire; deposits on the hot wire surface thus make for inadequate heat transfer.
Moreover, the flow of the fuel-air mixture is adversely affected by the hot wires applied to the throttle valve surface. Undesirable turbulence is developed in the mixture as a result.
Furthermore, the power supply to the hot wires, the throttle valve shaft, represents considerable complication in terms of additional components, and assembling these components additionally increases the production cost.
USPTO Backgrounds
USPTO Backgrounds