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  2. MAP sensor - Wikipedia

    en.wikipedia.org/wiki/MAP_sensor

    The engine requires the same mass of fuel in both conditions because the mass of air entering the cylinders is the same. If the throttle is opened all the way in condition 2, the manifold absolute pressure will increase from 50 kPa to nearly 100 kPa (14.5 psi, 29.53 inHG), about equal to the local barometer, which in condition 2 is sea level.

  3. Mass flow sensor - Wikipedia

    en.wikipedia.org/wiki/Mass_flow_sensor

    A mass (air) flow sensor (MAF) is a sensor used to determine the mass flow rate of air entering a fuel-injected internal combustion engine. The air mass information is necessary for the engine control unit (ECU) to balance and deliver the correct fuel mass to the engine. Air changes its density with temperature and pressure.

  4. MAFless Tuning - Wikipedia

    en.wikipedia.org/wiki/MAFless_Tuning

    The MAP sensor measures pressure in the engine's inlet manifold. When coupled with data regarding the engine's revolutions per minute, or RPM, and a table of volumetric efficiency over the operating range of the engine, the MAP sensor can be used by the engine management computer to calculate fuel requirements.

  5. Motronic - Wikipedia

    en.wikipedia.org/wiki/Motronic

    Fuel enrichment during cold-start is achieved by altering the timing of the main injectors based on engine temperature. The idle speed is also fully controlled by the digital Motronic unit, including fast-idle during warm-up. Updated variants ML 2.10.1 through 2.5 add MAF Mass Air Flow sensor logic and direct fire ignition coils per cylinder.

  6. Nissan Xterra - Wikipedia

    en.wikipedia.org/wiki/Nissan_Xterra

    The Nissan Xterra is a truck-based compact SUV manufactured and marketed by Nissan from 1999 to 2015 across two generations; the first (1999–2004) sharing a platform and many of its major exterior parts from the front doors forward with the Nissan (D22) Frontier pickup [1] – and the second (2005–2015) sharing the Nissan F-Alpha platform with the Frontier and Pathfinder.

  7. Engine control unit - Wikipedia

    en.wikipedia.org/wiki/Engine_control_unit

    Fuel pressure regulator; Rev limiter; Wastegate control and anti-lag; Theft prevention by blocking ignition, in response to input from an immobiliser; In a camless piston engine (an experimental design not currently used in any production vehicles), the ECU has continuous control of when each of the intake and exhaust valves are opened and by ...

  8. Lean-burn - Wikipedia

    en.wikipedia.org/wiki/Lean-burn

    The heart of the Mitsubishi's MVV system is the linear air–fuel ratio exhaust gas oxygen sensor. Compared with standard oxygen sensors, which essentially are on-off switches set to a single air/fuel ratio, the lean oxygen sensor is more of a measurement device covering the air/fuel ratio range from about 15:1 to 26:1. [19]

  9. Fuel injection - Wikipedia

    en.wikipedia.org/wiki/Fuel_injection

    K-Jetronic was a mechanical injection system, using a plunger actuated by the intake manifold pressure which then controlled the fuel flow to the injectors. [52] Also in 1974, Bosch introduced the L-Jetronic system, a pulsed flow system which used an air flow meter to calculate the amount of fuel required. L-Jetronic was widely adopted on ...

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