Measuring and testing – Simulating operating condition – Marine
Patent
1982-06-25
1984-05-01
Goldstein, Herbert
Measuring and testing
Simulating operating condition
Marine
73203, 73204, G01F 168, G01F 500
Patent
active
044453680
ABSTRACT:
A air flow rate meter apparatus includes an air bypass line, which branches off from a filter housing on the air intake fitting of an internal combustion engine and discharges at a restriction of the air intake tube upstream of a throttle valve. An injection valve is disposed in the restricted section, ejecting fuel in the direction toward a throttle valve. The air bypass line extends vertically and has a first U-shaped section, the connecting portion of which is located at a lower level than its legs. A temperature-dependent resistor in the form of a hot wire or hot strip is disposed in the downstream leg of the first U-shaped section, so that during a burnoff procedure of the temperature-dependent resistor a flow is effected in the direction toward the mouth of the air bypass line, thus preventing the aspiration of a fuel-air mixture into the air bypass line and thus avoiding the danger of ignition with the possible destruction of the temperature-dependent resistor.
REFERENCES:
patent: 1304920 (1919-05-01), Thomas
patent: 3559492 (1971-02-01), Baker et al.
patent: 4381668 (1983-05-01), Sato et al.
Goldstein Herbert
Greigg Edwin E.
Robert & Bosch GmbH
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