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Ignition systems are used by heat engines to initiate combustion by igniting the fuel-air mixture. In a spark ignition versions of the internal combustion engine (such as petrol engines), the ignition system creates a spark to ignite the fuel-air mixture just before each combustion stroke .
There are two kinds of enthalpy of combustion, called high(er) and low(er) heat(ing) value, depending on how much the products are allowed to cool and whether compounds like H 2 O are allowed to condense. The high heat values are conventionally measured with a bomb calorimeter. Low heat values are calculated from high heat value test data.
The block wears over time, reducing how much the points open (the "point gap") and causing a corresponding change in both the ignition timing and the fraction of time during which the points are closed. Tune-ups for older vehicles usually involve replacing the points and condenser and setting the gap to factory specifications. A third problem ...
Articles relating to ignition systems, which generate a spark or heat an electrode to a high temperature to ignite a fuel-air mixture. Subcategories This category has only the following subcategory.
The spark-ignition engine was a refinement of the early engines which used Hot Tube ignition. When Bosch developed the magneto it became the primary system for producing electricity to energize a spark plug. [37] Many small engines still use magneto ignition. Small engines are started by hand cranking using a recoil starter or hand crank.
The instrument gathers data about the ignition time, mass loss, combustion products, heat release rate, and other parameters associated with the sample's burning properties. The measurement of the heat release rate is based on Huggett's principle [ 2 ] that the gross heat of combustion of any organic material is directly related to the amount ...
The ignition source of a diesel engine is the heat generated by the compression of the air in the cylinder, rather than a spark as in gasoline engines. The dieseling phenomenon occurs not just because the compression ratio is sufficient to cause auto-ignition of the fuel, but also because a hot spot inside the cylinder (spark plug electrode ...
A condenser is designed to transfer heat from a working fluid (e.g. water in a steam power plant) to a secondary fluid or the surrounding air. The condenser relies on the efficient heat transfer that occurs during phase changes, in this case during the condensation of a vapor into a liquid. The vapor typically enters the condenser at a ...