Diaphragm arrangement for pressure transducers
AssigneeKistler Instrumente AG
InventorsGunther Witzke, Hans Ulrich Baumgartner
Life of this patent
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Abstract
A diaphragm arrangement for a pressure transducer, particularly one employed in monitoring an internal combustion engine and employing a force measuring transducer element abuts either against the pressure transducer directly or a preload element coupled therewith. The diaphragm arrangement includes a plurality of ring-shaped portions, one coupled to a preload volt element and another at the periphery of the transducer. Between these inner and outer portions of the diaphragm arrangement is an elastic portion interconnecting the two which permits the transducer to accurately monitor the pressure behavior, without the introduction of errors due to temperature shocks acting on the diaphragm during the measurement.
Claims25
A diaphragm arrangement for a pressure transducer especially for use in monitoring an internal combustion engine, said transducer having a force measuring transducer element, said diaphragm arrangement comprising:
- an outer ring portion;
- an inner ring portion;
- an elastic portion interconnecting said outer ring portion to said inner ring portion;
- at least each of the inner and outer ring portions of said diaphragm arrangement forming a first surface coplanar with a surface by way of which said pressure transducer is mounted for measuring an input force applied thereto, and the inner ring portion having a second surface which provides support for said transducer element;
- and
- means, coupled to said force measuring transducer element and said inner ring portion, for applying a preload to said force measuring transducer element.
A diaphragm arrangement for a pressure transducer, especially for use in monitoring an internal combustion engine, said transducer having an annular housing into which is fitted a force measuring transducer element and a preload sleeve element associated therewith, said diaphragm arrangement comprising:
- an outer ring portion;
- an inner ring portion;
- an elastic portion interconnecting said outer ring portion to said inner ring portion;
- at least each of the inner and outer ring portions of said diaphragm arrangement forming a first surface coplanar with a surface by way of which said pressure transducer is mounted for measuring an input force applied thereto, and the inner ring portion having a second surface which abuts said preload sleeve element;
- means, coupled to said preload sleeve element and said inner ring portion, for applying a preload to said force measuring transducer element, said preload applying means comprising an adjustable screw threaded in said preload sleeve element;
- and
- a preload sleeve surrounding said outer ring portion and forcing said outer ring portion against said annular housing.
Diaphragm arrangement for pressure transducers in particular for monitoring internal combustion engines, characterized by a diaphragm mounting surface lying in the same plane as a diaphragm pressure transmission surface, the diaphragm arrangement including an outer ring and an inner ring with the diaphragm therebetween and joined in one piece to the rings by elastic means forming the supports of a bridge-like connection, and the support of the inner ring on a force measuring element being adjustable with preloading means.
Dependencies are inferred from the claim text.