EXHAUST GAS RECIRCULATION MEASUREMENT DEVICE

摘要

An EGR measurement device for recirculating a portion of exhaust gas of an internal combustion engine that is adapted to allow accurate measurement of exhaust gas flow when the exhaust gas flows in a reverse direction that is opposite to the forward direction toward the intake of the engine. In one embodiment, an extension portion is used which extends over a second tap to allow measurement of pressure in the reverse flow direction so that flow rate can be calculated. In another embodiment, one or more pitot tubes are provided that allows accurate measurement of exhaust gas flow when the exhaust gas flows in a reverse direction.