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US 4,381,679 AGranted
Pick-up for the measurement of the velocity of an ionization gas
AssigneeRegie Nationale des Usines Renault
InventorClaude Lombard
Life of this patent
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Abstract
A pick-up for measuring the velocity of a gas by ion transit time including a coupling positioned between a valve for the gas, the velocity of which is to be measured and an electrode serving to measure the transit time inside a conduit delimiting the gaseous discharge. This pick-up can be used to measure the velocity of discharge gases at the intake of the cylinders of an internal combustion motor.
Claims7
A pick-up for measuring the velocity of a gas comprising:
- a conduit through which the gas flows;
- a valve member mounted in said conduit;
- at least one gas ionization electrode positioned in said conduit for emitting ions;
- at least one measurement electrode positioned at a certain distance within said conduit from said at least one gas ionization electrode;
- a source of pulsating high voltage power connected to said gas ionization electrode;
- means for measuring the distance between said gas ionization electrode and said measurement electrode;
- means for measuring transit time of said ions from said gas ionization electrode to said measurement electrode and for calculating the velocity to the gas from the measured transit time and the measured distance between said gas ionization electrode and said measurement electrode;
- and
- position coupling means interconnecting said valve member and one of said electrodes for variably positioning said one of said electrodes in response to movement of said valve member.
6 more elements
Dependencies are inferred from the claim text.