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  2. Anti-dribble valve - Wikipedia

    en.wikipedia.org/wiki/Anti-dribble_valve

    The valve resembles a typical spring-loaded check valve, with a small addition for the anti-dribble function. These valves are mounted on the outlet fittings of the fuel injection pump, one per cylinder injector. They are always mounted at the pump end of the pipes between the pump and injectors.

  3. Air-blast injection - Wikipedia

    en.wikipedia.org/wiki/Air-blast_injection

    Before the invention of precombustion chamber injection, air-blast injection was the only way a properly working internal air fuel mixture system could be built, required for a Diesel engine. During the 1920s, [2] air-blast injection was rendered obsolete by superior injection system designs that allowed much smaller but more powerful engines. [3]

  4. Secondary air injection - Wikipedia

    en.wikipedia.org/wiki/Secondary_air_injection

    A sensitive reed valve assembly called the aspirator valve is placed in the air injection pumping, which draws its air directly from the clean side of the air filter. During engine idle, brief but periodic negative pressure pulses in the exhaust system draw air through the aspirator valve and into the exhaust stream at the catalytic converter.

  5. Fuel injection - Wikipedia

    en.wikipedia.org/wiki/Fuel_injection

    Prior to 1979, the electronics in fuel injection systems used analogue electronics for the control system. The Bosch Motronic multi-point fuel injection system (also amongst the first systems where the ignition system is controlled by the same device as the fuel injection system) was the first mass-produced system to use digital electronics.

  6. Partially premixed combustion - Wikipedia

    en.wikipedia.org/wiki/Partially_premixed_combustion

    Its high specific power, high fuel efficiency and low exhaust pollution have made it a promising technology. As a compression-ignition engine, the fuel mixture ignites due to the increase in temperature that occurs with compression rather than a spark from a spark plug. [5] A PPC engine injects and premixes a charge during the compression stroke.

  7. Engine knocking - Wikipedia

    en.wikipedia.org/wiki/Engine_knocking

    Engines using indirect injection generally have lower levels of knock than direct injection engines, due to the greater dispersal of oxygen in the combustion chamber and lower injection pressures providing a more complete mixing of fuel and air. Diesels actually do not suffer exactly the same "knock" as gasoline engines since the cause is known ...

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