Exhaust Gas Analyzers

Brettschneider Equation Spreadsheet

Here is a link to download the Brettschneider Equation Spreadsheet. Brettschneider Calculation Excel Spreadsheet

Air-to-Fuel Ratio Basics for Motorcycle Tuning

The air-to-fuel ratio (AFR) is an important factor to consider when tuning a motorcycle. It refers to how much fuel and air are mixed together in the engine’s combustion chamber....

Tuning an LPG Engine using 2-gas and 4-gas analyzers - 18 EGA

A 2-gas (CO/HC) analyzer which can be used for basic small engine tuning using the CO gas reading to set fuel mixture, and the HC level to confirm running efficiency. ...

Technical Support Notes in PDF or Excel for Exhaust Gas Analyzers

01 Exhaust Gas Analyzer Lambda Worksheet – Brettschneider Calculation – Spreadsheet 03 ...

Chemical 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...

Exhaust 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...

Diagnosing 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,...

Performance 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...

Motorcycle 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...

Lambda 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...

Exhaust 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...

Combustion 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...

Combustion Efficiency Calculations - 9 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...

Using Lambda to Determine Air/Fuel Ratio - 7 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...

Oxidation and Reduction Efficiency Calculations - 6 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...

Non-Dispersive Infrared Technology Overview - 5 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,...

Troubleshooting Extended Tailpipe Probe Air Leaks - 4 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...

Exhaust Gas Analyzer Measurement Accuracy - 3 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...

Alternative Fuels: Calculating Lambda and Air/Fuel Ratio - 8 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...

Troubleshooting Exhaust Gas Analyzer Probe Air Leaks - 2 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...

Lambda Calculation Brettschneider Equation - 1 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...

Lambda 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...

The Catalytic Converter & Exhaust Gas Analyzers

At Bridge Analyzers, we are proud to be able to say that the roots of our company are firmly embedded in the ground of emissions testing and performance tuning for...

5 EGA Testing Tips for Diesel Engines

Diesel engine exhaust can be pretty dirty. Operate the gas analyzer with clean filters. Plan on changing filters (ALL of them) much more frequently than you have to with gasoline...

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Exhaust Gas Analyzers