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  2. Catalytic converter - Wikipedia

    en.wikipedia.org/wiki/Catalytic_converter

    A three-way catalytic converter on a gasoline-powered 1996 Dodge Ram Simulation of flow inside a catalytic converter. A catalytic converter is an exhaust emission control device which converts toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalyzing a redox reaction.

  3. Secondary air injection - Wikipedia

    en.wikipedia.org/wiki/Secondary_air_injection

    There was significant unburned and partially burned fuel in the exhaust of 1960s and early 1970s vehicles, and so secondary air injection significantly reduced tailpipe emissions. However, the extra heat of recombustion, particularly with an excessively rich exhaust caused by misfiring or a maladjusted carburetor , tended to damage exhaust ...

  4. Carburetor - Wikipedia

    en.wikipedia.org/wiki/Carburetor

    Heat from the exhaust is used to warm the intake manifold and in turn the carburetor. On V configurations, exhaust gases were directed from one head through the intake cross over to the other head. One method for regulating the exhaust flow on the cross over for intake warming was a weighted eccentric butterfly valve called a heat riser that ...

  5. Engine tuning - Wikipedia

    en.wikipedia.org/wiki/Engine_tuning

    Vintage engine testing equipment that can test ignition timing, ignition dwell, manifold vacuum and exhaust emissions. Engine tuning is the adjustment or modification of the internal combustion engine or Engine Control Unit (ECU) to yield optimal performance and increase the engine's power output, economy, or durability. These goals may be ...

  6. Crankcase ventilation system - Wikipedia

    en.wikipedia.org/wiki/Crankcase_ventilation_system

    The draught tube routes all blow-by gases back into the intake mixture and is usually located between the air filter and carburetor. Dry sump engines in some drag racing cars use scavenging pumps to extract oil and gases from the crankcase. [18] A separator removes the oil, then the gases are fed into the exhaust system via a venturi tube.

  7. Feedback carburetor - Wikipedia

    en.wikipedia.org/wiki/Feedback_carburetor

    The basic operation of a feedback carburetor: The carburetor would take in a signal from the oxygen sensor and would determine if the mixture was correct; If the mixture needed to be adjusted, a solenoid or stepper motor would move to adjust the AFR; Most included electric chokes for cold starting