Variable-flow-rate valve mechanism and turbocharger
AssigneeIHI Corporation
InventorJinhee Byon
Life of this patent
Estimating the term…
Abstract
A clearance δ between an inner peripheral surface of an attachment hole of an attachment tongue and an outer peripheral surface of a valve shaft is set to be smaller than an allowable displacement amount λ in an axial direction of a valve with respect to the attachment tongue. When a condition is satisfied in which the outer peripheral surface of the valve shaft comes into contact with a front-side periphery and a back-side periphery of the attachment hole of the attachment tongue, and in which a top surface of a valve body comes into contact with a back surface of the attachment tongue, a waste gate valve is constituted so that a metal washer becomes non-contact with a front surface of the attachment tongue.
Claims14
A variable-flow-rate valve mechanism comprising:
- an attachment member provided with an attachment hole;
- a valve including a valve body and a valve shaft provided with the valve body, the valve shaft swingably provided in the attachment hole;
- and
- a clasp provided at a tip of the valve shaft, wherein
- a clearance between an inner peripheral surface of the attachment hole of the attachment member and an outer peripheral surface of the valve shaft is set to be smaller than a value obtained by subtracting a depth dimension of the attachment hole of the attachment member from an interval dimension between a top surface of the valve body and a back surface of the clasp,
- in a state where the outer peripheral surface of the valve shaft comes into contact with a front-side periphery and a back-side periphery of the attachment hole of the attachment member, and where the top surface of the valve body comes into contact with a back surface of the attachment member, the clasp is free of contact with a surface of the attachment member, and
- a ratio of the value obtained by subtracting the depth dimension of the attachment hole of the attachment member from the interval dimension between the top surface of the valve body and the back surface of the clasp to the clearance is set to be 3.5 to 6.5.
A variable-flow-rate valve mechanism comprising:
- an attachment member provided with an attachment hole;
- a valve including a valve body and a valve shaft provided with the valve body, the valve shaft swingably provided in the attachment hole;
- a clasp for the valve, attached to the valve shaft on a position across the attachment member from the valve body, and
- a clearance between an inner peripheral surface of the attachment hole of the attachment member and an outer peripheral surface of the valve shaft wherein
- in a state where the valve is in contact with a front-side periphery of the attachment hole due to an inclination of the valve with respect to the attachment member, the clasp is free of contact with a surface of the attachment member, and
- a ratio of the value obtained by subtracting a depth dimension of the attachment hole of the attachment member from an interval dimension between a top surface of the valve body and a back surface of the clasp to the clearance is set to be 3.5 to 6.5.
A variable-flow-rate valve mechanism comprising:
- an attachment member provided with an attachment hole;
- a valve including a valve body and a valve shaft swingably provided in the attachment hole;
- and
- a clasp for the valve, attached to the valve shaft on a position across the attachment member from the valve body;
- wherein
- the valve satisfies a relationship:
- λ>(R1+R2) tan(β), in which
- λ is a value obtained by subtracting a depth dimension of the attachment hole of the attachment member from an interval dimension between a top surface of the valve body and a back surface of the clasp,
- R1 is a radius of the top surface of the valve body,
- R2 is a radius of a portion of the back surface of the clasp, and
- β is an inclination angle of the valve with respect to a center line of the attachment hole.
Dependencies are inferred from the claim text.