Intake device
AssigneeAndreas Stihl AG & Co. KG
InventorsReinhard Gerhardy, Klaus Geyer
Life of this patent
Estimating the term…
Abstract
An intake device having an intake channel that includes an intake channel section is provided. A butterfly valve is pivotably mounted in the intake channel section. A dividing wall is disposed downstream of the butterfly valve and divides the intake channel section into an air duct and a mixture duct. The air duct has a flow cross-section that is greater than the flow cross-section of the mixture duct. A fuel jet opens into the mixture duct.
Claims20
An intake device having an intake channel that includes an intake channel section, comprising:
- a butterfly valve pivotably mounted in the intake channel section;
- a first dividing wall disposed downstream of said butterfly valve and dividing said intake channel section into an air duct and a mixture duct, wherein said air duct has a flow cross-section that is greater than a flow cross-section of said mixture duct;
- and
- a second dividing wall, wherein said second dividing wall divides said intake channel section upstream of said butterfly valve, and wherein said second dividing wall is spaced from a longitudinal axis of a butterfly valve shaft by a distance that corresponds approximately to a radius of said butterfly valve shaft;
- and
- a fuel jet that opens into said mixture duct.
An intake device having an intake channel that includes an intake channel section, comprising:
- a butterfly valve pivotably mounted in the intake channel section;
- a first dividing wall disposed downstream of said butterfly valve and dividing said intake channel section into an air duct and a mixture duct, wherein said air duct has a flow cross-section that is greater than a flow cross-section of said mixture duct;
- a second dividing wall, wherein said second dividing wall is disposed upstream of said butterfly valve and is a choke valve that is pivotably mounted in said intake channel section, and divides said intake channel section upstream of said butterfly valve, and wherein said second dividing wall is spaced from a longitudinal axis of a butterfly valve shaft by a distance that corresponds approximately to a radius of said butterfly valve shaft;
- and
- a fuel jet that opens into said mixture duct.
An intake device having an intake channel that includes an intake channel section, comprising:
- a butterfly valve pivotably mounted in the intake channel section;
- a first dividing wall disposed downstream of said butterfly valve and dividing said intake channel section into an air duct and a mixture duct, wherein said air duct has a flow cross-section that is greater that a flow cross-section of said mixture duct;
- a second dividing wall, wherein said second dividing wall divides said intake channel section upstream of said butterfly valve, and wherein said second dividing wall is spaced from a longitudinal axis of a butterfly valve shaft by a distance that corresponds approximately to a radius of said butterfly valve shaft;
- and
- a fuel jet that opens into said mixture duct, wherein said fuel jet opens into said mixture duct downstream of said butterfly valve.
An intake device having an intake channel that includes an intake channel section, comprising:
- a butterfly valve pivotably mounted in the intake channel section;
- a first dividing wall disposed downstream of said butterfly valve and dividing said intake channel section into an air duct and a mixture duct, wherein said air duct has a flow cross-section that is greater than a flow cross-section of said mixture duct, and wherein a cross-section reducing ramp is disposed in said mixture duct, and wherein in an open position of said butterfly valve, said ramp is spaced from said butterfly valve by a distance that is 10 to 40%, of a diameter of said intake channel;
- a second dividing wall, wherein said second dividing wall divides said intake channel section upstream of said butterfly valve, and wherein said second dividing wall is spaced from a longitudinal axis of a butterfly valve shaft by a distance that corresponds approximately to a radius of said butterfly valve shaft;
- and
- a fuel jet that opens into said mixture duct.
Dependencies are inferred from the claim text.