Gas density ratio detector, gas concentration detector, and...

Details Gas density ratio detector, gas concentration detector, and... Gas density ratio detector, gas concentration detector, and...

2007-06-26

2007-06-26

Miller, Carl S. (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S520000, C073S861520, C073S114220

Reexamination Certificate

active

11397891

ABSTRACT:
When a gas flow producer is driven, plural kinds of gases flow into a measure-passage at respective timing. An orifice is provided in the measure-passage. The orifice has a diameter-changing portion which restricts a separation of gases from an inner surface of the measure-passage. A pressure sensor is provided in the measure-passage to detect a pressure determined by the orifice and the gas flow producer. A microcomputer calculates a density ratio between the gases based on the detected differential pressure.

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