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.

单词	residual gases
释义	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.
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