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White Paper
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Topic
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Adobe PDF
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#1
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Lambda Calculation – The Brettschneider Equation, general principles and methods
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The Brettschneider equation is the de-facto standard method used to calculate the normalized air/fuel balance (Lambda) for domestic and international I&M inspection programs. It is taken from a paper written by Dr. Johannes Brettschneider.... |
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#3
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Troubleshooting the Bridge exhaust gas analyzer for air leaks – Road Vehicle Product Configuration
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Due to sample gas air diution, an air leak will cause the CO, HC, and CO2 readings all to be low by an identical ratio. That is, if you see that CO is 5% low, (like 1.00% CO actual reading 0.95%) and also see that the HC and CO2 readings are likewise.... |
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#4
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Exhaust Gas Analyzer Accuracy – Calibration, Warm-up, Zero Drift and Span Errors
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Gas analyzer accuracy is comprised of two components – absolute error and relative error - commonly referred to as zero drift and span error. Zero drift is generally caused by thermal factors as the analyzer is warming up – and span error is generally caused by gas dilution.... |
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#7
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Oxidation and Reduction Efficiency Calculations
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One of the ways to look at the efficiency of an oxidation process is to evaluate how much of the fuel is oxidized by looking at the relative concentrations of the constituents of the output gas. For example, a gasoline engine oxidizes a blend of hydrocarbons.... |
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#10
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Using Lambda to determine Air / Fuel Ratio
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The Bridge Model 9004 (4-Gas) and Model 9005 (5-Gas) analyzers calculate the Oxygen/Combustibles balance (l - Lambda) from the measured values of O2, CO, CO2, unburned HC, and NOx (for the Model 9005) in the exhaust gas. This is a direct....
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#12
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Combustion Efficiency Calculations
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One of the ways to look at the efficiency of an oxidation process is to evaluate how much of the fuel is oxidized by looking at the relative concentrations of oxygen and combustibles in the output gas. For example, a gasoline engine oxidizes a blend of hydrocarbons.... |
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New Software Features - Alternative Fuels Selection & Enhanced Diagnostic Screen with 3-Decimal Lambda and Combustion Efficiency Displays
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