Device for the control of gas admissions into the induction manifold of an internal combustion engine
AssigneeRobert Bosch GmbH
InventorFranz Eheim
Life of this patent
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Abstract
A device for controlling the admission of additional gas, such as exhaust gas, to the induction tube of the engine so that additional gas quantities are admitted to the induction tube only during partial load operation. The device includes an additional gas quantity valve situated within the induction tube. The valve includes, in its various embodiments, structure to assure a high tolerance factor in the engagement of the valve seat and the movable valve member so that wear and temperature effects will not adversely affect the control of the additional gas quantity flow.
Claims22
In an air induction tube of an internal combustion engine within which a throttle flap valve is pivotably mounted with a portion thereof being pivoted in the direction of air flow through the induction tube, a device for controlling the admission of additional gas quantities into the induction tube, comprising:
- an additional gas supply line;
- means mounting the additional gas supply line to the induction tube with part of the additional gas supply line extending into the induction tube;
- an opening element arranged within the induction tube as an extention of the additional gas supply line and defining therein a free end;
- resilient means connected to the additional gas supply line and the opening element for biasing part of the opening element past the additional gas supply line into the induction tube where said free end defines a valve seat;
- and
- a movable valve member for engagement with the valve seat for controlling the flow of additional gas quantities from the additional gas supply line past the valve seat and into the induction tube, said movable valve member consisting of that portion of the throttle flap valve which is pivoted in the direction of air flow, wherein said opening element is both axially and rotationally shiftable relative to the additional gas supply line due to engagement with the movable valve member under the influence of said resilient means.
In an air induction tube of an internal combustion engine within which a throttle flap valve is pivotably mounted with a portion thereof being pivoted in the direction of air flow through the induction tube, a device for controlling the admission of additional gas quantities into the induction tube, comprising:
- an additional gas supply line having a free end;
- means mounting the additional gas supply line to the induction tube with part of the additional gas supply line extending into the induction tube and defining therein a valve seat with its free end;
- and
- movable valve means for engagement with the valve seat for controlling the flow of additional gas quantities from the additional gas supply line past the valve seat and into the induction tube, said movable valve means comprising:
- that portion of the throttle flap valve which is pivoted in the direction of air flow;
- and further means mounted to said throttle flap valve portion for engagement with the valve seat, wherein said further means is both axially and rotationally shiftable relative to the additional gas supply line due to engagement with the valve seat under the influence of the mounting of said further means to said throttle flap valve portion.
Dependencies are inferred from the claim text.