Measuring and testing – Simulating operating condition – Marine
Patent
1985-09-03
1987-04-21
Levy, Stewart J.
Measuring and testing
Simulating operating condition
Marine
73204, G01M 1900, G01F 168
Patent
active
046586415
ABSTRACT:
A method and an apparatus are disclosed for determining the flow rate of a flowing medium such as the amount of air supplied to an internal combustion engine. The apparatus includes at least one temperature-dependent resistor arranged in the flowing medium. For this purpose, an arrangement is provided which applies a quantity dependent on at least the flow rate to the temperature-dependent resistor. The method includes the step of abruptly reducing the flow rate dependent quantity to a value such as approximately zero in the presence of a flow-rate value lying below a predeterminable threshold value. Because the reduction takes place only for a predetermined period of time, normal operation will be resumed automatically when the flow rate rises again. A hot-wire air-flow sensor is arranged in the intake pipe of an internal combustion engine and the output signals thereof are a measure of the amount of air inducted by the internal combustion engine.
REFERENCES:
patent: 3747577 (1973-07-01), Mauch et al.
patent: 4334186 (1982-06-01), Sasayama et al.
patent: 4505248 (1985-03-01), Yozawa et al.
patent: 4562731 (1986-01-01), Nishimura et al.
Drews Ulrich
Kleinhans Josef
Levy Stewart J.
Ottesen Walter
Raevis Robert R.
Robert & Bosch GmbH
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