Exhaust Gas Analyzers
Technical Support Notes for Exhaust Gas Analyzers
01 Exhaust Gas Analyzer Lambda Worksheet – Brettschneider Calculation – Spreadsheet 03 ...
Read MoreChemical Sensor vs. NDIR Technologies for Measuring CO in Vehicle Exhaust - 17 EGA
Chemical Sensor Carbon Monoxide Measurement: Because CO is a chemically reactive gas, sensors based on the oxidation of CO to CO2 have been used for many years to detect and...
Read MoreExhaust Gas Analyzer Field Calibration Recommendations - 16 EGA
Technical Overview: The Bridge Exhaust Gas Analyzers use a mix of technologies to make gas measurement. NDIR (Non-Dispersive InfraRed) technology is used to measure CO, HC, and CO2. Chemical Sensors...
Read MoreDiagnosing Fuel Control and Catalytic Converter Efficiency - 15 EGA
Using Lambda and Combustion Efficiency The Bridge 4 Gas Analyzer (Model 9004) and 5 Gas Analyzer (Model 9005) calculate the Oxygen/Combustibles balance (Lambda) from the values of O2, CO, CO2,...
Read MorePerformance Tuning Using NOx as Precursor of Combustion Detonation - 14 EGA
Overview of NOx Generation and Measurement: NOx is formed during the early part of the combustion process, where there are high enough temperatures to cause nitrogen (80% of air) to...
Read MoreMotorcycle Performance Tuning with 2 Gas Analyzer - 13 EGA
Using a Model 9003 2-Gas (CO/HC) Gas Analyzer for Motorcycle Tuning: CO as an indicator of Air/Fuel Ratio, and HC as an indicator of Combustion Efficiency – Comparison to the...
Read MoreLambda Calculation for Performance Tuning - 12 EGA
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...
Read MoreExhaust Gas Readings and the Combustion Process - 11 EGA
Overview: In the past 30 years, the Exhaust Gas Analyzer has become a standard feature in many workshops. This need has been driven by a combination of requirements – the...
Read MoreCombustion Efficiency for Performance Tuning - 10 EGA
Combustion (Carbon Oxidation) Efficiency: 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...
Read MoreCombustion Efficiency Calculations - 09 EGA
Combustion (Carbon Oxidation) Efficiency: 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...
Read MoreUsing Lambda to Determine Air/Fuel Ratio - 07 EGA
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...
Read MoreOxidation and Reduction Efficiency Calculations - 06 EGA
Oxidation and Reduction Efficiency Calculations Combustion (Carbon Oxidation) Efficiency: One of the ways to look at the efficiency of an oxidation process is to evaluate how much of the fuel...
Read MoreNon-Dispersive Infrared Technology Overview - 05 EGA
NDIR Technology Overview, Compliance, and Comparison to Other Generally Available Gas Measurement Technologies Overview: Bridge Exhaust Gas Analyzers use two measurement methods for exhaust gas analysis: NDIR for CO, CO2,...
Read MoreTroubleshooting Extended Tailpipe Probe Air Leaks - 04 EGA
Air leaks in general: Due to sample gas air dilution, an air leak will cause the CO, HC, and CO2 readings all to be low by an identical ratio. That...
Read MoreExhaust Gas Analyzer Measurement Accuracy - 03 EGA
Exhaust Gas Analyzer Accuracy – Calibration, Warm-up, Zero Drift and Span Errors About gas analyzer accuracy: Gas analyzer accuracy is comprised of two components – absolute error and relative error...
Read MoreAlternative Fuels: Calculating Lambda and Air/Fuel Ratio - 08 EGA
Alternative Fuels – Measuring HC and Calculating Lambda and A/F Ratio on Gas Analyzers that normally measure Gasoline Fueled Vehicles Bridge gas analyzers prior to ‘Series 3’ versions (Serial numbers...
Read MoreTroubleshooting Exhaust Gas Analyzer Probe Air Leaks - 02 EGA
Air leaks in general: Due to sample gas air dilution, an air leak will cause the CO, HC, and CO2 readings all to be low by an identical ratio. That...
Read MoreLambda Calculation Brettschneider Equation - 01 EGA
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...
Read MoreLambda Calculation – Modified Brettschneider Equation - 01A EGA
Lambda Calculation – The Modified Brettschneider Equation – Corrected for Gasoline NDIR Measurement The Brettschneider equation is the de-facto standard method used to calculate the normalized air/fuel balance (Lambda) for...
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