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  2. Exhaust gas recirculation - Wikipedia

    en.wikipedia.org/wiki/Exhaust_gas_recirculation

    EGR valve the top of box on top of the inlet manifold of a Saab H engine in a 1987 Saab 90. In internal combustion engines, exhaust gas recirculation (EGR) is a nitrogen oxide (NO x) emissions reduction technique used in petrol/gasoline, diesel engines and some hydrogen engines. [1]

  3. Secondary air injection - Wikipedia

    en.wikipedia.org/wiki/Secondary_air_injection

    The first systems injected air very close to the engine, either in the cylinder head's exhaust ports or in the exhaust manifold. These systems provided oxygen to oxidize (burn) unburned and partially burned fuel in the exhaust before its ejection from the tailpipe. There was significant unburned and partially burned fuel in the exhaust of 1960s ...

  4. Fault detection and isolation - Wikipedia

    en.wikipedia.org/wiki/Fault_detection_and_isolation

    Therefore, the low speed of the training phase is a limitation of SVMs when it comes to its usage in fault detection and diagnosis cases. [20] Time domain waveform (top) and CWTS (bottom) of a normal signal. Artificial Neural Networks (ANNs) are among the most mature and widely used mathematical classification algorithms in fault detection and ...

  5. Cold start (automotive) - Wikipedia

    en.wikipedia.org/wiki/Cold_start_(automotive)

    A cold start is an attempt to start a vehicle's engine when ambient temperatures are much lower than its normal operating temperature. [1] A cold start can be difficult for an engine due to higher viscosity of oil and fuel in cold temperatures.

  6. Camless piston engine - Wikipedia

    en.wikipedia.org/wiki/Camless_piston_engine

    Camless valve trains have long been investigated by several companies, including Renault, BMW, Fiat, Valeo, General Motors, Ricardo, Lotus Engineering who developed electro-hydraulic valve actuation in the late 1980s as a spinoff of their active suspension program (both utilised similar electro-hydraulic actuation and control), Ford, Jiangsu Gongda Power Technologies, and Koenigsegg's sister ...

  7. Volkswagen emissions scandal - Wikipedia

    en.wikipedia.org/wiki/Volkswagen_emissions_scandal

    Bosch supplied two exhaust treatment components and engine control software. [167] In the case of 3.0-litre V6 TDI engines, Volkswagen suggested it can provide an uncomplicated fix that will bring the vehicles into compliance without adversely affecting performance, a move that the company hopes will avoid an expensive buyback of these cars. [348]

  8. Vehicle extrication - Wikipedia

    en.wikipedia.org/wiki/Vehicle_extrication

    Crashed car. Vehicle extrication is the process of removing a patient from a vehicle which has been involved in a motor vehicle collision. [1] Patients who have not already exited a crashed vehicle may be medically (cannot exit a vehicle due to their injuries) or physically trapped, [2] and may be pinned by wreckage, or unable to exit the vehicle because a door will not open.

  9. Chromosomal deletion syndrome - Wikipedia

    en.wikipedia.org/wiki/Chromosomal_deletion_syndrome

    The chromosomal basis of Cri du chat syndrome consists of a deletion of the most terminal portion of the short arm of chromosome 5. 5p deletions, whether terminal or interstitial, occur at different breakpoints; the chromosomal basis generally consists of a deletion on the short arm of chromosome 5.

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