Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1995-09-20
1997-03-11
Chambers, A. Michael
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
25112904, 25112911, 251368, F16K 3102
Patent
active
056091842
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a regulating device.
A magnetic probe is known from the published International Patent Application No. WO 92/10722. It comprises a magnet that surrounds a rotating shaft and a stator associated with the magnet. The stator is secured to a housing by a holder. A Hall sensor and an exciter coil face each other in a recess in the stator.
Although this probe has been proven, it needed to be further developed for use in motor vehicles.
An overall throttle-valve assembly is known from the German Patent No. 4,021,691 A1. It comprises a housing accommodating a throttle valve that spins on a shaft. Attached to the shaft are a potentiometer and a transmission. The transmission is powered by an electric motor. A regulating device compares signals representing engine speed, for example, and intercepted by the potentiometer and regulates the throttle valve by way of the motor.
There is a drawback in that, since the mechanisms and regulating device are accommodated in a housing, the whole valve must be removed and replaced in the event of a malfunction. It is too expensive to repair the defective components, so that the whole useless valve must be discarded. Another drawback is that the potentiometer is not precise enough.
SUMMARY OF THE INVENTION
The object of the present invention is accordingly to so improve a regulating device that operates magnetically in conjunction with a angle-of-rotation sensor that (1) they can be used in motor vehicles, (2) they are very precise, and (3) they can be manufactured easily and cost-effectively.
This object as well as other objects which will become apparent from the discussion that follows, are achieved in accordance with the present invention, by providing a shaft component arranged adjustably in a housing element and a rotating unit of a rotation angle sensor which can move in relation to the fixed unit. The stator element preferably consists of two rounded cusp-shaped subcomponents held with a bracing unit and secured in a stator mount. A clearance recess is provided between the subcomponents of the stator element. The rotating unit is a ring-shaped magnet element held by a magnet holder connected to the shaft element; this arrangement allows the magnet element to move around the stator element subcomponents leaving an air gap.
The particular advantages obtainable in accordance with the present invention are that the magnet can be secured directly to the shaft by the magnet holder and the stator and electromagnetic components directly to the housing that houses the overall throttle-valve assembly or a similar structure by the stator holder. It is accordingly possible to manufacture these subassemblies independent of the overall assembly. The result is the major advantage that the components comprising the angle-of-rotation sensor can be attached to overall throttle-valve assemblies of different types. Maintenance and repair etc. are also essentially more cost-effective and rapid.
Another very essential advantage is that the stator-tensioning subassembly secures the stator in the stator holder without screws or other fasteners.
The stator-tensioning subassembly ensures that the stator will be positioned precisely in its holder and will not need to be adjusted to the rotating components. Again, the stator-tensioning subassembly represents a simple means of preventing rotation and displacement on the part of the stator components, which will remain stationary enough to provide precise and reproducible results.
It is of advantage for the stator components to have at last one approximately 45.degree. bezel and at least one accommodating bore for a tensioning pin to extend through. The bezels affect the magnetic flux and increase the precision of the angle-of-rotation sensor. The stator components can comprise stamped-out blanks of specially treated, "textured", sheet metal stacked into packages. The stator components are designed in particular to prevent magnetization losses in the stator from contaminating the results
REFERENCES:
patent: 3602254 (1971-08-01), Fawkes
patent: 4316254 (1982-02-01), Levin et al.
patent: 4601211 (1986-07-01), Whistler
patent: 4694390 (1987-09-01), Lee
patent: 4967792 (1990-11-01), Magee
patent: 5148106 (1992-09-01), Ozawa
patent: 5257014 (1993-10-01), Zimmermann
Apel Peter
Hauschopp Marion
Wilczek Klaus
AB Elektronik GmbH
Chambers A. Michael
LandOfFree
Regulating device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Regulating device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Regulating device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-437029