Measuring and testing – Simulating operating condition – Marine
Patent
1982-08-17
1984-05-22
Myracle, Jerry W.
Measuring and testing
Simulating operating condition
Marine
73204, G01F 168
Patent
active
044493975
ABSTRACT:
An apparatus for measuring the mass of a pulsating medium flowing in a flow cross-section, in particular for measuring the aspirated air mass of internal combustion engines. The apparatus includes a temperature-dependent measuring resistor, whose temperature and/or resistance is regulated in accordance with the mass of a flowing medium. The measurement signal (U.sub.S) representing the mass of the medium can be influenced in accordance with the flow direction by use of a pressure-sensing element which has corresponding electrical contacts and when there is a flow reversal the pressure-sensing element, via a correction circuit, suppresses the delivery of the measurement signal (U.sub.S) to an electronic control unit. By use of the correction circuit it is also possible to subtract the amount measured during a reverse flow from the measurement signal made during flow in the desired flow direction. As a result, an error in the measurement signal (U.sub.S) during pulsating flow is prevented.
REFERENCES:
patent: 4264961 (1981-04-01), Nishimura et al.
patent: 4404846 (1983-09-01), Yamauchi et al.
Greigg Edwin E.
Myracle Jerry W.
Robert & Bosch GmbH
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