Real-time Fuel Consumption Measurement Using Raw Exhaust Flow Meter and Zirconia AFR Sensor

By: Masanobu AKITA

10 June 2014


The improvement of fuel efficiency is one of the most important issues in the R&D of powertrain system. The real-time fuel consumption can be determined by AFR (air-to-fuel ratio) and raw exhaust gas flow rate and can be easily obtained without delay time by the in-situ measuring devices which can be installed at the same location. Integrated fuel consumption by this method showed a good correlation with that by the carbon balance method. On the other hand, when a fuel-cut is operated, the difference in transient behavior of the fuel consumption has been also observed due to the response time difference between these two methods. The result suggests that this method has a large potential for measuring the real-time fuel consumption.

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