spark advance

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Spark advance

Early automobiles had a spark control that allowed the timing of the spark with respect to the position of the piston to be manually adjusted. Retarded too much, the engine would not run well at high speeds. Advanced too much and the engine would fire too soon and kick while being cranked. This sometimes resulted in a broken arm.
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Noun1.spark advance - the timing of ignition relative to the position of the piston in an internal-combustion engine
timing - the time when something happens
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With reference to the above discussed literature overview, in this paper, a more detailed experimental analysis of the water injection technology is presented with the aim to quantify its impact on main engine performance parameters, such as fuel consumption and IMEP, and control parameters (knock-limited spark advance, A/F ratio and TIT).
In addition, especially in a turbocharged engine, the WI substantially changes the boost pressure, airflow rate, TIT and hence relevant adjustments of spark advance, A/F ratio and waste-gate opening are expected in a prefixed torque-speed operating point.
Automatic spark advance later was built into the distributor.
Baytech's engine calibration software provides optimized closed-loop fuel control, spark advance and other engine parameters.
In the CFD simulations, only the combustion portion has been simulated, restarting the calculation at before the spark occurrence and shifting the spark advance from 12 to15 CAD.
V3 had a different spark advance (calibration) strategy imposed by the engine management system.
Figure 9 shows the effect of spark advance and it is observed that increasing the spark advance beyond 6[degrees]CA resulted in a decrease in the torque for non-EGR operation.
We specifically focus on how the biomass-derived oxygenates ethanol, isobutanol, 2,5-dimethylfuran (DMF), anisole, 4-methylanisole (4-MA), 2,4-xylenol, and 2-phenylethanol (2-PE) impact fuel properties, as well as knock-limited spark advance and PM emissions from a single cylinder DISI engine.
In fact, the spark advance, fuel maps and other variables can all be adjusted while the engine is running.
In particular, both a spark advance and an air-to-fuel ratio (a) sweep are actuated.
22] For each blend tested, the fuel flow rate and intake air pressure were held constant after achieving the nominal 925 kPa NMEP load at 10[degrees] BTDC spark advance.