Tag Archives: sensors

Diagnostics

Various jurisdictions now legislate on-board diagnostics to monitor the function and condition of the emissions-control system, including the catalytic converter. On-board diagnostic systems take several forms. Temperature sensors are used for two purposes. The first is as a warning system, … Continue reading →

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Installation

Many vehicles have a close-coupled catalysts located near the engine’s exhaust manifold. This unit heats up quickly due to its proximity to the engine, and reduces cold-engine emissions by burning off hydrocarbons from the extra-rich mixture used to start a … Continue reading →

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Types of catalytic converter

Two-way A two-way (or “oxidation”) catalytic converter has two simultaneous tasks: Oxidation of carbon monoxide to carbon dioxide: 2CO + O2 → 2CO2 Oxidation of hydrocarbons (unburnt and partially burnt fuel) to carbon dioxide and water: CxH2x+2 + [(3x+1)/2] O2 … Continue reading →

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