Method for measuring the flow rate of pulsating medium having a

Details Method for measuring the flow rate of pulsating medium having a Method for measuring the flow rate of pulsating medium having a

1983-04-11

1985-12-03

Lacey, David L.

Measuring and testing

Simulating operating condition

Marine

73204, G01M 1500

Patent

active

045559376

ABSTRACT:
A method is proposed for measuring the flow rate of the pulsating air mass aspirated by an internal combustion engine when there is a backflow. To this end, an integration process in one direction is initiated at a zero passage of the flow rate measurement value (U.sub.S) of the air flow rate measuring device at a given time, which indicates the beginning of the backflow; this integration process is continued until a subsequent zero passage occurs. Directly thereafter, an integration process in the opposite direction is initiated, which is terminated at a time when the latter integration value returns to zero. During the first integration process the flow rate measurement value (U.sub.S) is set to the value of zero and is not deregulated until the termination of the second integration process, so that it then jumps to a value which is subtracted from the flow rate measurement value, and the result is a flow rate measurement value from which the backflow has been excluded.

REFERENCES:
patent: 4264961 (1981-04-01), Nishimura et al.
patent: 4275695 (1981-06-01), Bauer et al.
patent: 4279146 (1981-07-01), Wessel et al.
patent: 4404864 (1983-09-01), Yamauchi et al.
patent: 4449397 (1984-05-01), Lauterbach
patent: 4457167 (1984-07-01), Sumac
patent: 4463601 (1984-08-01), Rask
patent: 4468963 (1984-09-01), Schauble

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