Page:Motors and motor-driving (1902).djvu/148

116 (3) The Spray Carburetter.—The carburetter fitted to the Daimler two-cylinder engine is a good representative of this class. It is depicted in fig. II. The general principle is as follows: The petrol enters the float chamber through a pipe. It is then drawn by the suction of the engine along a circular passage, and through the jet, and impinges against the sloping sides of the carburetter. At the same time air is drawn though the air cylinder and into the jet chamber through



the aperture. Here, rushing upward, it mixes with the atomised petrol, and the two are thoroughly mingled in the carburetter, and are thence drawn along the passages and  to the induction valves, which in turn give admission to the combustion chamber.

The supply of petrol is governed as follows: As it ascends through pipe into the float chamber  it raises the float  until the petrol has reached a point in the float chamber almost as high as the top of the jet. At this stage the upward