The Petrol Engine A Text-book dealing with the Principles of Design and Construction, with a Special Chapter on the Two-stroke Engine

Important factors in the choice of a liquid fuel for use in portable internal combustion engines are: (1) low cost; (2) ease and safety of transportation or storage; (3) high vo...

In the two-stroke type of petrol engine the cycle of operations is completed in two working strokes of the piston instead of the four required by the “Otto” cycle; there is thus...

=Poppet Valves.=—Valves are provided for the purpose of controlling the admission of the mixture to the cylinder and also for controlling the exhaust or ejection of the burnt ga...

We have already stated that the charge of explosive mixture is ignited in the cylinder at the end of the compression stroke by means of an electric spark. The electric spark tak...

=The Piston= is perhaps the most important detail to consider, for it is on the piston that the force of the explosion acts when the heat energy is converted into mechanical ene...

=Work.=—A force is said to do mechanical work when it overcomes a resistance in its own _line of action_. The line of action of a force is a line indicating the direction in whi...

A carburettor is a contrivance for supplying an explosive mixture of air and petrol vapour to a petrol engine. Petrol, although a liquid fuel, is a combination of carbon and hyd...

For the purpose of explaining the cycle of operations we have considered only a diagrammatic sketch of an imaginary motor-car engine, but in Fig. 7 we illustrate an up-to-date m...

=Choosing the Number of Cylinders.=—It is a very difficult problem to select the _best_ engine for a particular purpose, as there are so many factors which influence one’s choic...

We have already explained the necessity for cooling the cylinders of a petrol engine by means of a water-jacket, and we now proceed to show how the circulation system may be arr...

=Properties of Oils.=—Owing to the very high speed at which the modern petrol engine runs great attention must be paid to lubricating the moving parts, otherwise undue wear or e...

=Explosive Mixtures.=—If a small quantity of liquid petrol or benzol be placed in an open vessel and exposed to a current of air it will quickly disappear or _evaporate_. We say...

This book deals with _principles_. There are many books which give a descriptive account of existing types of engines, but my object in writing this volume has been to assist th...

IGNITION AND IGNITION DEVICES— The Sparking Plug 51 The High Tension Magneto 52 The Ignition Coil 57 Wiring Diagram for Magneto Ignition System 60 Wiring Diagram for a Coil Igni...

THE CARBURETTOR AND CARBURATION— The Float Chamber 44 The Petrol Jet and Choke Tube 46 The Mixing Chamber and Throttle Valve 47 Recent Improvements in Carburettors 47 Pressure F...