tomahvisucik16

02.12.2020 20:48 •  Английский язык

Выписать из текста предложения с глаголами в форме причастие или герундий и сослагательное наклонение. the internal combustion engine is a machine that develops power from the combustion of fuel within a cylinder. the cycle of operation is as follows: a) suction stroke- just before the piston reaches the inner dead-centre, a valve, usually of the "poppet" type, is opened. on its outward stroke, the piston draws into the cylinder an explosive mixture of air and fuel vapour. shortly before the piston reaches the outer dead-centre, the inlet valve is closed and the compression stroke begins. 1. compression stroke- during this stroke, the whole of the gas in the cylinder is compressed into the free space at the head of the cylinder. 2. explosion, or working stroke- when the compression stroke is almost complete, the explosive mixture is ignited by an electric spark or by other suitable means. the gases reach their maximum pressure almost immediately, and work is done until the piston has again reached a position just before the outer dead- centre, when a second exhaust valve is opened. if the ignition takes place too late, the piston begins its outward journey before the maximum pressure is developed and power is lost. if, on the other hand, the explosive mixture is ignited too early, the maximum pressure is reached before the piston has completed its inward journey, and engine is slowed down or even stopped. d) exhaust stroke- the burnt gases are driven out in front of the and its return until the inlet valve again opens, when the cycle is repeated.