Residual Gases

Residual Gases

 

the gases that remain in the cylinder of an internal-combustion engine after the exhaust stroke has been completed. Residual gases contain combustion products and nitrogen. Before combining with the incoming fuel-air mixture, residual gases have a temperature between 700° and 800°C. They constitute from 8 to 15 percent of the weight of fresh charge in the cylinder. The contents of cylinders in an idling engine have the maximum possible proportion of residual gases—25 percent. For every percent of weight of the mixture of fresh charge and residual gases that is contributed by the residual gases, the air-fuel mixture is warmed by 8° to 10°C. As compression in the cylinder increases, both the absolute and relative amounts of residual gases in the cylinder decrease.

References in periodicals archive ?
supply from tank residual gases, supply of gas bottles;
The intake pressure, on the other hand, is higher for the early EVC setting due to the wider throttle position required to compensate for the charge dilution by residual gases.
Residual gases, such as methane and ethane, are used by domestic
Residual gases, such as methane and ethane, are used by domestic industry and for power production, he said.
Long considered a tradeoff for the higher resolution, higher brightness and smaller energy spread of a cold FEG TEM, emission stability degrades because of residual gases in the area of the tip.
7 Internal moisture content measurement and the analysis of other residual gases.
The residual gases being used as a chemical plant feedstock.
The AJAX LE engine-scavenging process removes the residual gases from the previous cycle out of the power cylinder, pushing these gases into the exhaust pipe.
Never cut open any tank unless it is empty and has been completely filled with water to displace all residual gases.
The observation was striking and led to numerical simulations of isochoric cooling that show that the composition of the residual gases in the vessel remains frozen to a temperature as high as 1650[degrees]K after hours of standing at the final room temperature.
30] torr, the specific gas that dominates the residual gases is water vapor desorbing from the chamber's internal surfaces and diffusion from within the bulk of hygroscopic materials.
continuous clamping with no corebox movement during the entire blow and cure cycle, and built-in exhaust connections to capture residual gases directly from the corebox.