The Vaporizing Of Paraffin for High-Speed Motors
(Electric Ignition Type)

114 VAPORIZING OF PARAFFIN. constant temperature maintained and partly to the special method of admission eontrol; for these reasons such motors can be handled with success under circum- stances wherewith motors of the change-over bi-fuel type would be a failure. In place of the ordinary practice for regulating the mixture supply, the admission period is controlled by a lever g acting on a series of wedge blocks n, by which means the timing of the opening and closing of the admission valves can be varied over a sufficiently wide range for all practical purposes. As the vaporizers are kept at a constant and the most suitable working temperature under all speed and load conditions, the carburetion problem is materially simplified, also the motor is rendered capable of running light or declutched with a clear exhaust, which in regard to fuel efficiency, more than compensates for the oil used in the burners. When applied to a launch or other purpose, where the motor is required to be run on continuous heavy duty, a water feed is provided for and supplied direct to the cylinders through snifting valves s in the covers, to which water from the circulating system h, h1, A2, h3 and rotary pump p, is fed by pin-drips d, the stream being broken up by air jets entering at a1. It will be seen that the admission-valve seatings are partly mixture- and partly flame-jacketed, and effectu- ally prevents the occurrence of liquid paraffin escaping down the valve stems. But with a flame-heated vaporizer the most important point is the burner, as the motor is as entirely dependent on its continuous action as is ignition on properly timed sparking at the igniter; however, judging from the number and variety of pur- poses to which these motors are used, this difficulty has