They are or were used in: the Volkswagen ( Engine Details Blog)Beetle, some Porsche and Subaru cars, many BMW and Honda motorcycles, and aircraft engines (for propeller driven aircraft), etc.It should not be confused with the opposed-piston engine, in which each ... four or more cylinders canted 90 degrees into the horizontal plane.I saw a newspaper reference to a vehicle at the Detroit Auto Show having pistons positioned horizontally opposed to each other, in what the writer described . This is especially evident with the popularity of smaller diesel engine propelled cars in Europe.
Continuance of the use of the internal( Automobile Sells Price USA ) combustion engine for automobiles is partly due to the improvement of engine control systems (onboard computers providing engine management processes, and electronically controlled fuel injection). Forced air induction by turbocharging and supercharging have increased power outputs and engine efficiencies. Similar changes have been applied to smaller diesel engines giving them almost the same power characteristics as petrol engines.
Larger diesel engines are still often( New Engine Motors News ) used in trucks and heavy machinery, although they require special machining not available in most factories. They do not burn as clean as gasoline engines, however they have far more torque. The internal combustion engine was originally selected for the automobile due to its flexibility over a wide range of speeds. Also, the power developed for a given weight engine was reasonable; it could be produced by economical mass-production methods; and it used a readily available, moderately priced fuel - petrol.
An engine or motor is a machine( UK Car Sells Price ) designed to convert energy into useful mechanical motion. Heat engines, including internal combustion engines and external combustion engines (such as steam engines) burn a fuel to create heat which is then used to create motion. Electric motors convert electrical energy into mechanical motion, pneumatic motors use compressed air and others, such as wind-up toys use elastic energy. In biological systems, molecular motors like myosins in muscles use chemical energy to create motion.
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