Mass flow measurement device

Details Mass flow measurement device Mass flow measurement device

1997-06-17

1999-06-15

Chilcot, Richard

Measuring and testing

Simulating operating condition

Marine

73113, 731173, G01M 1500

Patent

active

059132396

ABSTRACT:
A gas mass flow sensor for sensing the flow of a gas to an internal combustion engine including a main flow passage having an inlet and an outlet for directing a gas flow to the internal combustion engine with the inlet communicating with a source of the gas and an outlet communicating with the internal combustion engine. A secondary flow passage for isolating a portion of the gas flow from the main flow passage is provided with the secondary flow passage including an inlet surrounding the main flow passage and a flow sensing section. Positioned within the flow sensing section of the secondary flow passage is a gas mass flow sensor for sensing the mass flow of gas through the secondary passage which is indicative of the mass flow through the main flow passage. Positioned within the main flow passage is a nozzle with the nozzle including a nozzle inlet and nozzle outlet wherein the outer diameter of the nozzle inlet is less than an inner diameter of the main flow passage with the inlet of the secondary flow passage being in the form of an annulus between the nozzle inlet and the main flow passage. The mass flow sensor may be incorporated into a unitary mass flow sensing and mixing module for sensing a flow of both air and fuel as well as for mixing the air and fuel together for delivery to an internal combustion engine.

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