Flexible turbocharger air duct with constricting rings
a flexible, turbocharger technology, applied in the direction of combustion-air/fuel-air treatment, fuel air intake, machines/engines, etc., can solve the problems of air duct or hose expansion, duct surface abrasion, duct expansion is typically exposed to high temperatures, etc., to achieve the effect of limiting duct expansion and low cos
Inactive Publication Date: 2017-01-26
FORD GLOBAL TECH LLC
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AI Technical Summary
Benefits of technology
The solution effectively limits duct expansion, preventing interference and noise while maintaining cost-effectiveness and using conventional rubber materials, thus addressing the issues of high-pressure and temperature-induced expansion in turbocharger systems.
Problems solved by technology
Moreover, the ducts are typically exposed to high temperatures.
The high temperatures and pressures may cause an air duct or hose to expand during turbocharger operation.
The inflation of the duct outside diameter can cause interference with surrounding components, potentially resulting in abrasion of the duct surface, breaking of mounting brackets, burst hoses (resulting in lack of power), or slow leaks with a resulting hissing noise.
In addition, a unrestrained pressurized duct surface can result in radiated sound from the turbocharger that reaches the passenger compartment, causing unacceptable noise disturbances to the passengers.
This results in a greatly increased manufacturing cost, as well as a greater difficulty of installation due to a higher stiffness.
Such composite ducts suffer the same drawbacks, such as increased manufacturing costs and environmental issues.
Method used
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[0025]Referring now to FIG. 1, a flexible air duct 10 has an elongated elastomeric body extending longitudinally between a first end 11 and second end 12. Ends 11 and 12 are configured to attach to respective turbocharger devices, such as a compressor 13 and a charge air cooler 14. A set of constricting rings 15 has individual rings 16, 17, and 18 spaced longitudinally between ends 11 and 12. Each ring 16-18 applies a radial compression force around a respective circumference of duct 10. The compression force limits local expansion of duct 10 when subjected to turbocharger operating pressure (which may rise to between 25 and 35 psi, for example). By appropriate spacing of the rings, a density (e.g., the aggregate longitudinal width of all the rings divided by the longitudinal length of duct 10 between devices 13 and 14) is obtained which is sufficient to limit a volume increase of duct 10 under turbocharger operating pressure to less than about 20% (as compared to the expansion that...
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A turbocharger system includes a flexible duct having an elongated elastomeric body extending longitudinally between first and second ends configured to attach to respective turbocharger devices. A plurality of constricting rings are spaced longitudinally between the ends. Each constricting ring applies a radial compression force around a respective circumference of the duct. Each ring is comprised of a molded thermoplastic retained in a concentric shape by a clasp. The spacing of the constricting rings has a density sufficient to limit a volume increase of the duct under turbocharger operating pressure to less than 20%. Each constricting ring has an inner surface including an intrusion feature providing a reduced compression force on the duct so that a portion of the duct enters the intrusion feature, thereby anchoring the constricting ring in a substantially fixed position.
Description
CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a division of co-pending U.S. application Ser. No. 14 / 133,876, filed Dec. 19, 2013, entitled “Flexible Turbocharger Air Duct with Constricting Rings,” which is hereby incorporated by reference.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH[0002]Not Applicable.BACKGROUND OF THE INVENTION[0003]The present invention relates in general to turbocharger systems for motor vehicles with internal combustion engines, and, more specifically, to air ducts for moving pressurized air between separate components within a turbocharged system.[0004]Turbo systems can increase the power derived from an internal combustion engine by compressing the intake air provided to the engine. Turbochargers require ducting to move air from a compressor to a charge air cooler, and then to a throttle body on the engine. Elastomeric duct sections are typically used in order to provide easy installation, to accommodate variable alignment / distances bet...
Claims
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IPC IPC(8): F02M35/10
CPCF02M35/10137F02M35/10144Y02T10/144F02M35/10321F02M35/10157F02M35/10354Y02T10/12
InventorSTEC, RANDALL A.KHAMI, ROGERBISHOP, CHRISTOPHER B.HERMANN, ERIK H.
OwnerFORD GLOBAL TECH LLC