Continuously variable electrically actuated flow control valve f

Details Continuously variable electrically actuated flow control valve f Continuously variable electrically actuated flow control valve f

1998-07-16

2000-06-27

Yuen, Henry C.

Power plants

Fluid motor means driven by waste heat or by exhaust energy...

With supercharging means for engine

12356821, 25112911, F02D 2300, F02B 4708

Patent

active

060792108

ABSTRACT:
A continuously variable electrical actuator rotationally coupled to and thermally isolated from a butterfly valve. The butterfly valve may be used to modulate high temperature exhaust gas flow through an engine turbocharger. An electrical actuator provides a continuously variable output to an output shaft. The butterfly valve has its rotary position controlled by an input shaft. The input shaft and output shaft are rotationally coupled through minimum contact points to reduce heat transfer. The connection between input and output shafts also minimizes vibration transfer therebetween. An coupling tube coaxially interposed between the input and output shafts provides a thermal block to further reduce heat transfer. The input and outputs shafts are rotationally coupled to the intermediate shaft by torsion spring mechanisms to allow a limited range of axial translation for the input shaft. The torsion spring mechanisms are preloaded to prevent rotational hysteresis in the butterfly valve.

REFERENCES:
patent: 2753147 (1956-07-01), Welge
patent: 4380246 (1983-04-01), Casale et al.
patent: 4819696 (1989-04-01), Takikawa et al.
patent: 5085401 (1992-02-01), Botting et al.
patent: 5148678 (1992-09-01), Ueda et al.
patent: 5638926 (1997-06-01), McCrickard
patent: 5738072 (1998-04-01), Bolte et al.
patent: 5913329 (1999-06-01), Haynes et al.

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